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Thread: Driveshafts

  1. #1
    GMN Founder Grand Marquis GT's Avatar
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    Default Driveshafts

    In my upcoming quest, I am on the lookout for another aluminum driveshaft. I know a later one will work, but how much of a difference in length is there? What years used a short driveshaft (referring to later model cars).

    i have to make up 5/8" by use of the UPR driveshaft spacer already. I would LOVe to snag a MMX driveshaft but I have read that they are too short.
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    Approaching 2 decades of DDing Box Panthers VicCrownVic's Avatar
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    I'd say Panterra77 might be most likely to have an answer.

    He has comparison pictures of driveshafts in the last 2 pics of this post:
    http://www.grandmarq.net/vb/showthre...l=1#post759431

    This post from the same thread might be more along the lines of the info you seek:
    http://www.grandmarq.net/vb/showthre...l=1#post759504
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    White collar, and a red neck P72Ford's Avatar
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    Tom, what was in the white coupe? I suspected that it was a little short, but not short enough to matter. It worked perfectly! Suspension was a little lower, but I don't imagine that was the only thing that made it useable.
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    John has an MMX driveshaft on his car, I don't believe he used any sort of spacer. Try seeing what he has to say. I'm using a late 90's aluminum police driveshaft on my 82, no problems, just swapped the yoke, even the U-joints were the same. (it fits the 8.8, would have had an issue with the 8.5)
    -Phil



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  5. #5
    I post a lot... pantera77's Avatar
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    You can use an MMX, just need to run a spacer to make up the difference.

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    Is running an mmx shaft with a spacer more adviseable than a stock steel shaft? Not trying to be comrade question here, just wondering if the benefits outweigh the risks.

  7. #7
    Fastest Box In South Jersey 86VickyLX's Avatar
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    I have the P71 aluminum driveshaft confirmed by the paint rings.
    MMX shafts have Pink/Green or Pink/Green/Blue bands. You can find a whole bunch of new ones on ebay for a ridiculous amount of money. XW7Z-4602-AA is the part number.
    If you can confirm with the seller via picture the colors of the rings on the driveshaft you can probably get one for 125 or so.
    Last edited by 86VickyLX; 01-15-2016 at 11:33 AM.
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    Fastest Box In South Jersey 86VickyLX's Avatar
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    http://www.gdmjoe.com/gothvic/drivel...t-tsb99181.pdf If you go fast a lot you should consider changing it.
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    Let's throw a wrench in here; what driveshaft upgrade options work on on the Lincolns? Were they the same underneath 'cept for the longer tailshaft housing on the tranny?

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  10. #10
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    Quote Originally Posted by P72Ford View Post
    Tom, what was in the white coupe? I suspected that it was a little short, but not short enough to matter. It worked perfectly! Suspension was a little lower, but I don't imagine that was the only thing that made it useable.
    I think it was from a 95 or so P71. If I can find another, I am using it.
    1983 Grand Marquis 2Dr Sedan "Mercules"
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  11. #11
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    What year did they change the diameter of the yoke? I know later whales won't fit in early aeros (regardless of driveshaft length)... or is that some misinformation I've been fed?

    The ballancer equipped yoke on my 93 is starting to fall apart. I'll need to replace it soonish.

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  12. #12
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    Quote Originally Posted by phayzer5 View Post
    Let's throw a wrench in here; what driveshaft upgrade options work on on the Lincolns? Were they the same underneath 'cept for the longer tailshaft housing on the tranny?
    Custom or Aluminum TownCar shaft (Pretty fucking rare btw). What is the length of the box TownCar driveshaft while we're talking about it?
    "Vicky" 1986 Ford LTD Crown Victoria LX ..................................."Blue" 1992 Mercury Grand Marquis LS

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  13. #13
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    Later whales got the bigger 1350 universal joint front and rear. Not sure what year the changeover was, but I want to say 2006. If yoke splines did not change and the axle flange did not change, it would be a nice upgrade to stronger ujoints.

    [back from a look at Rockauto.
    upto 6/18/06 is the 1330 ujoint.
    from 6/19/06 is the bigger 1350 joint.]

    Alex.
    Last edited by GM_Guy; 01-15-2016 at 05:28 PM.

  14. #14
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    Quote Originally Posted by phayzer5 View Post
    Let's throw a wrench in here; what driveshaft upgrade options work on on the Lincolns? Were they the same underneath 'cept for the longer tailshaft housing on the tranny?
    I have heard of a Thunderbird driveshaft being used on a Town Car, correct length but I don't know what year/configuration it was.
    http://www.crownvic.net/ubbthreads/u...Number=2731666
    Last edited by BlackVic_P71; 01-15-2016 at 05:26 PM.
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  15. #15
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    I keep reading the 4r7xw yoke is different from the AOD/C4/T5/shit tone of other transmissions... but the AODE seems to be an enigma. I can't find anything definitive about that one. I think the splines are the same, but the yoke is thicker on the 4R7x. I kinda wish I had kept the driveshaft instead of letting Nick have it when he bought the Lincoln. Tuned out that it had the long tailshaft housing and needed the shorter driveshaft. I could test fit that yoke without having to disable 2 cars at once. And I really want to get rid of that balancer yoke BS. I may end up having to get a high speed balanced shaft and there's a shop over near Fort Worth that does just that. But if I can just fit a yoke I can get off the shelf to a better driveshaft, that would work much better.

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  16. #16
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    1330 1350 conversion ujoints exist, so mix 'n match yokes and late shafts shouldn't be an issue.

    Alex.

  17. #17
    GMN Founder Grand Marquis GT's Avatar
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    Quote Originally Posted by GM_Guy View Post
    1330 1350 conversion ujoints exist, so mix 'n match yokes and late shafts shouldn't be an issue.

    Alex.
    Pretty much. I have used them in the past. I wish I had done better documentation of when we put that driveshaft in the white car...
    1983 Grand Marquis 2Dr Sedan "Mercules"
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  18. #18
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    I suffer from that. Information I figure I'll remember forever, then a ringer part comes along and screws up all that carefully tucked away in dusty memory banks.

    some measurements here;
    http://www.pontiacperformance.net/Te...haft_Swap.html

    Police aluminum shaft is shorter, 1" is often cited on cvn, above says 3/4". One big problem is, very few people know the right way to measure a driveshaft so measurments are all over the place.
    And I snagged this pic off of cvn, it is a 2005 civilian steel shaft next to a box wagon steel shaft, same length. You will need to retain the aod yoke though regardless of what shaft you end up with.

    Alex.
    Attached Thumbnails Attached Thumbnails cvgm 2005 shaft vs box wagon shaft DSCF3202.jpg  
    Last edited by GM_Guy; 01-17-2016 at 03:43 PM.

  19. #19
    Fastest Box In South Jersey 86VickyLX's Avatar
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    While we're on the subject of yokes. There are two different size yokes on the differential. There's the small one that's found on non heavy duty box applications, and the larger one (standard) that is used up until the end of production.
    "Vicky" 1986 Ford LTD Crown Victoria LX ..................................."Blue" 1992 Mercury Grand Marquis LS

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  20. #20
    Fastest Box In South Jersey 86VickyLX's Avatar
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    To clarify. According to the fordparts.com website, the MMC driveshaft is available only in late model 1999 (or TSB revised early 99), 2000, 2001, 2002, and 2003 Police interceptor models. With I'm figuring 3.55 rear axle.
    "Vicky" 1986 Ford LTD Crown Victoria LX ..................................."Blue" 1992 Mercury Grand Marquis LS

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