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Thread: AOD TV Pressure High in Neutral, Transmission Shifts Like the TV Pressure is Low

  1. #21
    I'm an air-conditioned gypsy gadget73's Avatar
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    should already be the long AOD in a Lincoln, unless there is an extra long one from a truck maybe? The Lincoln AOD is an inch and some change longer than the Ford one. Driveshaft too. 3" longer wheel base, basically half is in the trans and the other half is in the driveshaft.

    Pretty sure the output shaft is also different, not just the housing on the back. You can swap that but still not have proper spline engagement. The output spline should be pretty much flush with the end of the trans. If its down inside about an inch its the short output shaft in a long housing and that won't work right.

    86 Lincoln Town Car (Galactica).
    5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

    91 Lincoln Mark VII LSC SE, triple black (Timewarp) - poly front bushings, KYB struts and shocks, Holley SystemMax1 lower intake, SilverFox AOD valve body,

    1984 Lincoln Continental TurboDiesel - rolls coal

    Quote Originally Posted by phayzer5 View Post
    I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

  2. #22
    88 LTC nfldfordltd's Avatar
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    So I have an update since yesterday.

    The extension housing bushing was grabbed by the driveshaft yoke and spun in the housing. I removed the housing and went looking for parts. Found a trans shop that had a new bushing in stock, they pressed it in for me. Brought it home and slid it on over the driveshaft yoke, it was snagging.

    I grabbed some emery paper and rubbed down the outer surface of the yoke. Checked it and it slid in and out nicely.

    I put the extension housing seal back in place, used some JB Weld to hold er and put it back onto the transmission.

    Been driving it since yesterday evening now, seems to be OK.

    I think the outer surface of the driveshaft yoke was pitted, rusty and scored and pulled the bushing out, causing everything else to come unglued due to excessive vibrations.

    Still need to find a valvebody to try and see if that's why my shifts are so mushy despite the TV pressure being so high.

    Thanks for the advice, guys.

    Summer car-> 1988 Lincoln Town Car, triple blue, 292,xxx km. New HO 5.0 in and running. Bought 2006/08/22. June 2017 PotM!
    Winter vehicle-> 1995 Ford F-250 XLT SuperCab 4x4, 237,xxx+km. AKA "Brutus" 460/E4OD/4.10 axles and 12 MPG. Bought 2019/08/14

    Quote Originally Posted by phayzer5 View Post
    I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

  3. #23
    I'm an air-conditioned gypsy gadget73's Avatar
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    Had similar from my original drive shaft. it had been put in a vise to change the U joints and it kept destroying rear seals before I found it. It also had bad vibration problems so the fix was just swapping the whole thing with one that wasn't screwed up. Lost the heavy duty tow package part, but meh.

    86 Lincoln Town Car (Galactica).
    5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

    91 Lincoln Mark VII LSC SE, triple black (Timewarp) - poly front bushings, KYB struts and shocks, Holley SystemMax1 lower intake, SilverFox AOD valve body,

    1984 Lincoln Continental TurboDiesel - rolls coal

    Quote Originally Posted by phayzer5 View Post
    I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

  4. #24
    88 LTC nfldfordltd's Avatar
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    Got a valvebody of unknown reliability this past week. Brought it home, took the separator plate off and checked it to ensure it was all there and the balls were where they belonged. Everything looked good, so I put the plate back on and put it into the transmission to try it out.

    Never touched TV pressure adjustment, just plugged and played the valvebody. Remember I have my TV cable as short as it will go, max TV pressure.

    Took it for a test run, exact same shifting as with the valvebody that was already there. If anything the shifts were even softer, earlier and piling up worse. Still no 3-2 kickdown unless you're almost stopped, blah blah blah.

    What else, other than a valvebody could cause this? Or was I unlucky enough to have tried two pooched valvebodies?

    If anyone has a spare governor (preferably an HO governor, as I have done the HO conversion to mine) laying around, I could be interested in obtaining it. PM here or on facebook if you would like to complete a transaction.

    Summer car-> 1988 Lincoln Town Car, triple blue, 292,xxx km. New HO 5.0 in and running. Bought 2006/08/22. June 2017 PotM!
    Winter vehicle-> 1995 Ford F-250 XLT SuperCab 4x4, 237,xxx+km. AKA "Brutus" 460/E4OD/4.10 axles and 12 MPG. Bought 2019/08/14

    Quote Originally Posted by phayzer5 View Post
    I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

  5. #25
    The Brown Blob 87gtVIC's Avatar
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    I do not have a spare ho governor but You can look into the aod hi rev kit from transgo. I put that in my Vic when going to HO and beyond. It is not an entire governor though just parts to convert your existing governor to a hi rev one.
    ~David~

    My 1987 Crown Victoria Coupe: The Brown Blob
    My 2004 Mercedes Benz E320:The Benz

    Quote Originally Posted by DerekTheGreat View Post
    But, that's just coming from me, this site's biggest pessimist. Best of luck

  6. #26
    88 LTC nfldfordltd's Avatar
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    Quote Originally Posted by 87gtVIC View Post
    I do not have a spare ho governor but You can look into the aod hi rev kit from transgo. I put that in my Vic when going to HO and beyond. It is not an entire governor though just parts to convert your existing governor to a hi rev one.
    I assume you're happy with the results of adding those parts?

    Summer car-> 1988 Lincoln Town Car, triple blue, 292,xxx km. New HO 5.0 in and running. Bought 2006/08/22. June 2017 PotM!
    Winter vehicle-> 1995 Ford F-250 XLT SuperCab 4x4, 237,xxx+km. AKA "Brutus" 460/E4OD/4.10 axles and 12 MPG. Bought 2019/08/14

    Quote Originally Posted by phayzer5 View Post
    I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

  7. #27
    88 LTC nfldfordltd's Avatar
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    Quote Originally Posted by nfldfordltd View Post
    Mine is so Frankensteined now that if the paint marks WERE visible, they have lost their significance anyway.

    -88 Town Car
    -HO converted 5.0
    -1983 AOD made up from three different transmissions and a couple new parts, including 2000 RPM stall B&M TorkMaster convertor
    -Driveshaft 'presumed' to be from a box Ford or Mercury (2 3/8" shorter than the driveshaft that came out of the Lincoln, believed to be about 1" too long and probably an incorrect part to begin with)
    -Only thing original and untouched in the driveline is the rear axle, that's a Y-code

    FWIW, my output shaft had at an estimated 1/4" of lateral play with the driveshaft and extension housing seal removed. Definitely bad bushing, which explains the vibration.

    Good luck sorting your balance issues.
    So I went to buy a driveshaft from a guy I know who's parting out an 86 this afternoon. I took my original driveshaft (the one that was giving me the grief for being too 'long') and laid it on the tailgate of my truck to compare to one that came out of a Town Car, turns out it was the exact same length as the one that came out of my car to begin with.
    Which brings me back to - why in the name of all that's holy would my rear axle be at least an inch or more too close to the tail of the transmission?
    I'm going to get a spacer made to go in behind the short driveshaft I'm running now, fork it.

    Summer car-> 1988 Lincoln Town Car, triple blue, 292,xxx km. New HO 5.0 in and running. Bought 2006/08/22. June 2017 PotM!
    Winter vehicle-> 1995 Ford F-250 XLT SuperCab 4x4, 237,xxx+km. AKA "Brutus" 460/E4OD/4.10 axles and 12 MPG. Bought 2019/08/14

    Quote Originally Posted by phayzer5 View Post
    I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

  8. #28
    The Brown Blob 87gtVIC's Avatar
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    Quote Originally Posted by nfldfordltd View Post
    I assume you're happy with the results of adding those parts?
    It did the job as advertised. I have a 5 speed in the car now though as it is more fun.
    ~David~

    My 1987 Crown Victoria Coupe: The Brown Blob
    My 2004 Mercedes Benz E320:The Benz

    Quote Originally Posted by DerekTheGreat View Post
    But, that's just coming from me, this site's biggest pessimist. Best of luck

  9. #29
    Wagon Addicted Tiggie's Avatar
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    I wonder if your engine/trans is in the right place? Or your rear axle?

    I think I’d get the AOD from that parts car if it’s available. I think the combination of parts in your current one is not compatible, and it would take an AOD expert to examine each part figure out why the pressure is bleeding off.
    1988 Crown Vic Wagon - daily
    1990 Country Squire - weekend cruiser, former lawn ornament
    Other: 95 Ranger, 74 F250, 68 Mustang, 94 Mustang
    Sold: 1982 LTD and 1987 Crown Vic

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  10. #30
    I'm an air-conditioned gypsy gadget73's Avatar
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    I don't believe there are multiple mount points for the trans crossmember, and definitely not for the engine so even if you could play multiple choice with the trans, there is only one place it can bolt up that it will mate to the engine correctly. The rear also doesn't have multiple mount choices. Has this car ever been seriously wrecked before? I'm half wondering if the frame has been crunched and things just do not fit as they should anymore. Would take a hell of a crunch to move the engine and the rear together enough to make the driveshaft seem to be ~1" too long.

    I'm also not aware of any extra long AOD, just the short Ford one and the long Lincoln one. Lincolns got the long one. Unless maybe there is some super long truck one? Don't know on that.

    86 Lincoln Town Car (Galactica).
    5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

    91 Lincoln Mark VII LSC SE, triple black (Timewarp) - poly front bushings, KYB struts and shocks, Holley SystemMax1 lower intake, SilverFox AOD valve body,

    1984 Lincoln Continental TurboDiesel - rolls coal

    Quote Originally Posted by phayzer5 View Post
    I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

  11. #31
    88 LTC nfldfordltd's Avatar
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    Quote Originally Posted by Tiggie View Post
    I wonder if your engine/trans is in the right place? Or your rear axle?

    I think I’d get the AOD from that parts car if it’s available. I think the combination of parts in your current one is not compatible, and it would take an AOD expert to examine each part figure out why the pressure is bleeding off.
    I wanted it, but the guy preferred to sell the engine and transmission as a unit

    Summer car-> 1988 Lincoln Town Car, triple blue, 292,xxx km. New HO 5.0 in and running. Bought 2006/08/22. June 2017 PotM!
    Winter vehicle-> 1995 Ford F-250 XLT SuperCab 4x4, 237,xxx+km. AKA "Brutus" 460/E4OD/4.10 axles and 12 MPG. Bought 2019/08/14

    Quote Originally Posted by phayzer5 View Post
    I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

  12. #32
    88 LTC nfldfordltd's Avatar
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    Quote Originally Posted by 87gtVIC View Post
    It did the job as advertised. I have a 5 speed in the car now though as it is more fun.
    I'm keeping the auto, I will overcome it.

    Summer car-> 1988 Lincoln Town Car, triple blue, 292,xxx km. New HO 5.0 in and running. Bought 2006/08/22. June 2017 PotM!
    Winter vehicle-> 1995 Ford F-250 XLT SuperCab 4x4, 237,xxx+km. AKA "Brutus" 460/E4OD/4.10 axles and 12 MPG. Bought 2019/08/14

    Quote Originally Posted by phayzer5 View Post
    I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

  13. #33
    88 LTC nfldfordltd's Avatar
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    Quote Originally Posted by gadget73 View Post
    I don't believe there are multiple mount points for the trans crossmember, and definitely not for the engine so even if you could play multiple choice with the trans, there is only one place it can bolt up that it will mate to the engine correctly. The rear also doesn't have multiple mount choices. Has this car ever been seriously wrecked before? I'm half wondering if the frame has been crunched and things just do not fit as they should anymore. Would take a hell of a crunch to move the engine and the rear together enough to make the driveshaft seem to be ~1" too long.

    I'm also not aware of any extra long AOD, just the short Ford one and the long Lincoln one. Lincolns got the long one. Unless maybe there is some super long truck one? Don't know on that.
    There is no evidence of the car being smashed up and repaired, it was a 127,xxx km all original car when I bought it in 2006. In the 14 years I've owned it, I can guarantee it's not been in any accidents where the frame could be tweaked since I've had it. In 2007 a Chev Colorado backed into the middle of the driver's door and crooked the door skin, that's it. Fender-bender at best, the rear bumper of the truck was damaged just as much as the Lincoln's door. Carfax report does not reveal any accidents either.

    I discovered the long driveshaft problem when I broke off the output shaft in fall 2008. Needed to remove driveshaft as a step to remove transmission, took a full day of trying this, it not working, trying that, it not working, etc etc before I got it out. Once the replacement transmission was installed, it was equally as hard to get the driveshaft back in, that was spring 2009. U-joints were replaced during that winter while the shaft was out. Replacement transmission was from a scrap yard, missing the ID tag and appeared to have been rebuilt in the past.

    I built an engine and installed it in 2017, engine mounts were absolutely fine and I reused them. When I did the transmission overhaul this year, I bought and installed a new transmission crossmember mount (rear engine mount). Engine and transmission is where it belongs.

    What is interesting is today I got OH to come out and measure the wheelbase with me, just out of curiosity, we measured it to be 116 5/8" (2962 mm) between the centers of the Continental stars on the hub center caps. I then looked up the WB spec, triple checked it with multiple sources and verified it's supposed to be 117.3 (2979 mm). When the math is done, that means my WB is about 11/16" or 17 mm shorter than it's supposed to be. I could understand <1/4" or so for suspension position (spring compression) or suspension bushing wear, etc. But 11/16"?!? That's got to be outside of any tolerance allowed for that measurement...rear axle appears to be fine, control arms not bent, bushings original but not worn to being a concern. Car handles fine, no dog-tracking, etc.

    I always have the strange problems...lol

    Summer car-> 1988 Lincoln Town Car, triple blue, 292,xxx km. New HO 5.0 in and running. Bought 2006/08/22. June 2017 PotM!
    Winter vehicle-> 1995 Ford F-250 XLT SuperCab 4x4, 237,xxx+km. AKA "Brutus" 460/E4OD/4.10 axles and 12 MPG. Bought 2019/08/14

    Quote Originally Posted by phayzer5 View Post
    I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

  14. #34
    No mean-spiritedness here. IPreferDIY's Avatar
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    Quote Originally Posted by nfldfordltd View Post
    ... we measured it to be 116 5/8" (2962 mm) between the centers of the Continental stars on the hub center caps. ...
    Just to clarify, on both sides?

    2000 Grand Marquis LS HPP, a hand-me-down in 2008 with 128,000 km; 175,000 km as of July 2014
    mods: air filter box "tuba" (in place of the "trumpet"), headlight relay harness, J-mod (around 186,350 km), 70mm throttle body, NKL4 PCM (from a 2000 CVPI, nothing great there apart from highway cruising), KYB Gas-A-Just shocks (after >202,000 km on originals)

  15. #35
    I'm an air-conditioned gypsy gadget73's Avatar
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    is it the same on both sides? Thats pretty funky. I've never measured mine, but honestly never had reason to either. It always seemed long enough. The wheelbase at least.

    just trying to imagine what could even cause that. I'd expect that even if someone had replaced the rear control arms, there isn't anything else that would fit but move the axle that far forward. The front can't be moved from where it is. If the frame were compressed by that much in the middle you'd definitely know it. The doors wouldn't open and there would be some obvious carnage where things were buckled.

    86 Lincoln Town Car (Galactica).
    5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

    91 Lincoln Mark VII LSC SE, triple black (Timewarp) - poly front bushings, KYB struts and shocks, Holley SystemMax1 lower intake, SilverFox AOD valve body,

    1984 Lincoln Continental TurboDiesel - rolls coal

    Quote Originally Posted by phayzer5 View Post
    I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

  16. #36
    88 LTC nfldfordltd's Avatar
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    @ Gadget73 and IPreferDIY: I did not measure both sides, as my thought process on that was similar to yours, gadget in that the car would be all over the road if the wheelbase measurements weren't at least fairly close on both sides. Even if it handled and drove OK, it would be impossible to get it lined up so that one or more tires wasn't getting destroyed excessively fast. If the rear end were diagonal, I would suspect severe tire wear issues on the rear tires, which I do not have that problem. I can't do a burnout FFS...
    Just for clarity, I did have a wheel alignment done last Friday. Mechanic said the caster/camber adjustments were maxed out due to sagging front springs. My front lower control arm bushings are getting pretty worn too, but not 11/16" worn.
    Later on I'll check the other side's WB measurement and I'll try it with the car parked in a couple different positions as well to compare and see what kind of difference there is (if any). Need my assistant back to do that

    Summer car-> 1988 Lincoln Town Car, triple blue, 292,xxx km. New HO 5.0 in and running. Bought 2006/08/22. June 2017 PotM!
    Winter vehicle-> 1995 Ford F-250 XLT SuperCab 4x4, 237,xxx+km. AKA "Brutus" 460/E4OD/4.10 axles and 12 MPG. Bought 2019/08/14

    Quote Originally Posted by phayzer5 View Post
    I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

  17. #37
    I'm an air-conditioned gypsy gadget73's Avatar
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    even if the front arms were that wasted and shoved backwards 11/16", that wouldn't affect the distance from trans to diff any. Seems that has to be funky if the driveshaft acts too long.

    Unless its just the splines inside the drive shaft are f'd and its bottoming out on the damaged section?

    86 Lincoln Town Car (Galactica).
    5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

    91 Lincoln Mark VII LSC SE, triple black (Timewarp) - poly front bushings, KYB struts and shocks, Holley SystemMax1 lower intake, SilverFox AOD valve body,

    1984 Lincoln Continental TurboDiesel - rolls coal

    Quote Originally Posted by phayzer5 View Post
    I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

  18. #38
    No mean-spiritedness here. IPreferDIY's Avatar
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    I'm not OCD, but in a situation like this I would measure both sides just so I know. There might be no reason to believe it would be different etc, but I would be compelled to verify it anyway. Dunno about the finer points of caster etc, but if it's maxed out, is that adding to or taking away from the wheelbase?

    Something I noticed in your broken output shaft thread was that someone asked about whether the axle was at full drop when the driveshaft came out, and it looks like there was no answer. Any recollection?

    2000 Grand Marquis LS HPP, a hand-me-down in 2008 with 128,000 km; 175,000 km as of July 2014
    mods: air filter box "tuba" (in place of the "trumpet"), headlight relay harness, J-mod (around 186,350 km), 70mm throttle body, NKL4 PCM (from a 2000 CVPI, nothing great there apart from highway cruising), KYB Gas-A-Just shocks (after >202,000 km on originals)

  19. #39
    I'm an air-conditioned gypsy gadget73's Avatar
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    there isn't really a lot of caster adjustment possible on these. Positive caster would be moving the top of the spindle forward, so if anything it would add ever so slightly to the wheelbase. Definitely not enough adjustment range to account for 11/16". I'd honestly be surprised if it would do more than 1/8" over the entire range. Still wouldn't have anything to do with the driveshaft.

    86 Lincoln Town Car (Galactica).
    5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

    91 Lincoln Mark VII LSC SE, triple black (Timewarp) - poly front bushings, KYB struts and shocks, Holley SystemMax1 lower intake, SilverFox AOD valve body,

    1984 Lincoln Continental TurboDiesel - rolls coal

    Quote Originally Posted by phayzer5 View Post
    I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

  20. #40
    88 LTC nfldfordltd's Avatar
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    Update: OD started slipping yesterday. Fluid is burnt, and today I had virtually no OD at all.

    Summer car-> 1988 Lincoln Town Car, triple blue, 292,xxx km. New HO 5.0 in and running. Bought 2006/08/22. June 2017 PotM!
    Winter vehicle-> 1995 Ford F-250 XLT SuperCab 4x4, 237,xxx+km. AKA "Brutus" 460/E4OD/4.10 axles and 12 MPG. Bought 2019/08/14

    Quote Originally Posted by phayzer5 View Post
    I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

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