Volvo RWD 700 Forum

INDEX FOR 10/2025(CURRENT) INDEX FOR 12/2006 700 INDEX

[<<]  [>>]


THREADED THREADED EXPANDED FLAT PRINT ALL
MESSAGES IN THIS THREAD




  REPLY TO THIS MESSAGE    PRINT   SAVE 

rear differentialoptions for 87 740 Turbo 700

posted by  someone claiming to be 850 T-Gul on  Sat Jan 22 09:02 CST 2005 [RELATED]

Hey, my 740 Turbo needs a new rear end and I was wondering if there were more options other than just replacing it with a new Dana OEM replacement. I know I could buy the stock Dana rear end and then have it strengthened by a trans shop. I was wondering if there any stronger rear ends that bolt in with no problems like a different model Dana, prefferebly one with a limited slip? TIA








  •   REPLY TO THIS MESSAGE    PRINT   SAVE 

    rear differentialoptions for 87 740 Turbo 700

    posted by  someone claiming to be Charles on  Sat Jan 22 16:23 CST 2005 [RELATED]

    IMO, unless you are planning a V8 conversion in the near future, it would be a waste of time and money to have the stock rear end "streghtened" by a machine shop. These rear ends usually fail for one of two reasons: lack of lubrication, or abuse at the hands of a garage lacky with a pneumatic air wrench after replacing the pinion seal.

    Barring the above misfortunes, they can and do run for several hundreds of thousand of miles without trouble. Have seen an '84 DL with 450K on the odometer and an original rear end.

    Your best bet is probably a used unit from the scrap yard. Make sure that it has the same ratio (3.91 for a turbo w/autobox) and is from the same type of car (sedan or wagon) as your own. Grab the entire axle, and you've got a spare set of bushings, discs, calipers and pads (assuming that the brake system hasn't been pilfered).








    •   REPLY TO THIS MESSAGE Replies to this message will be emailed.    PRINT   SAVE 

      rear differentialoptions for 87 740 Turbo 700

      uid 55's pic
      posted by  john sargent on  Sat Jan 22 18:04 CST 2005
      Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
      last visit: Wed Oct 22 09:07 CST 2014
      [RELATED]

      Turbo 700s with automatic have a 3.73 ratio, and turbo 700s with manual have 3.54 ratio.

      The Volvo rear ends seem to hold up well to high power including V8s, but the truss work attaching the rear end to the unibody fails on the 700 series.
      --
      john








      •   REPLY TO THIS MESSAGE    PRINT   SAVE 

        rear differentialoptions for 87 740 Turbo 700

        posted by  someone claiming to be Charles on  Sat Jan 22 20:33 CST 2005 [RELATED]

        "Turbo 700s with automatic have a 3.73 ratio, and turbo 700s with manual have 3.54 ratio."

        Yes, you are correct - the 3.91 ratio is only found in 700 series equipped with the ZF autobox, and I *believe* that most of those are GLE's. Sorry about that - I used keep up on this stuff, but recently I have been occupied with other activities and the cars have been running well (almost too well, if you know what I mean), so....

        "The Volvo rear ends seem to hold up well to high power including V8s, but the truss work attaching the rear end to the unibody fails on the 700 series."

        I was not aware of this. Is it only an issue when additional power comes into play (i.e. V8 conversions), or is it a known failure point on older 700s?








        •   REPLY TO THIS MESSAGE Replies to this message will be emailed.    PRINT   SAVE 

          rear differentialoptions for 87 740 Turbo 700

          uid 55's pic
          posted by  john sargent on  Sun Jan 23 04:29 CST 2005
          Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
          last visit: Wed Oct 22 09:07 CST 2014
          [RELATED]

          Even high powered four cylinder 700s can bend the part in the accompanying picture, particularly if they have a limited slip differential. This part does not fail on stock 700s.


          --
          john








        •   REPLY TO THIS MESSAGE    PRINT   SAVE 

          rear differentialoptions for 87 740 Turbo 700

          posted by  someone claiming to be Charles on  Sat Jan 22 20:40 CST 2005 [RELATED]

          Upon consulting the FAQ, I see that the ZF HP 22 was used mostly in the turbo and turbo diesels (D24/D24T). 3.73 ratio for 740 turbos and 740 gle's with AW 71/AW 72, respectively. 3.54 for either car with the M46.

          Not that I doubted you. :-)








          •   REPLY TO THIS MESSAGE    PRINT   SAVE 

            rear differentialoptions for 87 740 Turbo 700

            posted by  someone claiming to be Charles on  Sat Jan 22 20:41 CST 2005 [RELATED]

            3.91 for 240 turbos with AW71, though. That must have been what I was thinking of...had my wires crossed.







<< < > >>



©Jarrod Stenberg 1997-2022. All material except where indicated.


All participants agree to these terms.

Brickboard.com is not affiliated with nor sponsored by AB Volvo, Volvo Car Corporation, Volvo Cars of North America, Inc. or Ford Motor Company. Brickboard.com is a Volvo owner/enthusiast site, similar to a club, and does not intend to pose as an official Volvo site. The official Volvo site can be found here.