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Rear Transmission Seal & Bushing Job - Please Review 700

I'm about to embark on replacing the rear transmission seal and bushing on my '89 740 Turbo brick (115K miles). I've studied the FAQ carefully and read the many posts regarding this job. I think I've got this figured out, but I wanted to post my proposed steps, with the hopes of getting pointers from you in case I have something wrong. Thanks in advance!

1) Place the car on 4 jackstands, as high as possible
2) Drain ATF via drain plug on bottom of pan
3) Make alignment notes on end of drivetrain and end of flange, where they meet.
4) Place tranny in neutral
5) Using rear wheels to turn the drivetrain, loosen and remove all 4 bolts holding drivetrain to flange. Keep notes of which bolt goes where. Move drivetrain out of the way
6) Place tranny in park
7) Using 30mm socket, remove center flange nut. Remove flange. Catch oil.
8) Disconnect wires and linkage from tranny (how much do I need to remove?)
9) Support tranny at pan with hydraulic jack, using a board of wood to distribute weight
10) Remove center bolt holding transmission mount to cross member
11) Remove four bolts holding crossmember to chassis. Remove crossmember
12) Slowly lower the transmission to make room for access on the top.
13) Brush, wipe, blow all the debris off of the unit. Also wipe the body pan.
14) Remove bolts holding rear housing to tranny. Remove rear housing. Catch oil.
15) Inspect gasket to determine if reusable. If not, either scrape away leftover gasket on tranny and housing, or use sealant when putting things together again to insure proper seal.
16) Remove old seal
17) Either punch out old bushing, or bring to shop to press out old bushing and insert new bushing
18) Insert new seal (and bushing if applicable) into rear housing.
19) Attach new gasket if applicable.
20) Install rear housing, torque bolts to spec (does anyone know them?)
21) Install crossmember
22) Install center mount nut
23) Install flange, torque center bolt to spec
24) Attach flange to drivetrain, insuring proper bolts are used and alignment is as marked earlier
25) Lower car. Add ATF as needed. Test drive, check for leaks.

Do I have this right? Any and all comments are welcome - I want to this job once, and get it right.

Thanks again!






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New Rear Transmission Seal & Bushing Job - Please Review [700]
posted by  balladish  on Tue Dec 30 12:45 CST 2003 >


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