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88 300E Transmission Issues!
The Car:
1988 300E 722.xx Automatic Transmission I pulled the transmission over the winter of 05/06 and took my time with a rebuild. I replaced ALL clutch plates, seals, gaskets and the Vacuum Modulator. About a month ago I finished the job, tested the trans and all seemed fine, that is until I realized I was not getting 4th gear. I did some asking around on the message boards and most people thought is was related to the B2 piston. I recalled during the re-assembly that the cover for the B2 piston did not pop back out when I pressed it in to put the snap ring in place. I figured it would just pop out once the transmission had some pressure in it. After driving the car up to the store and back, I put it park to open my garage door and when I got back in I had no gears at ALL. I pushed it backwards with the car still running and suddenly reverse kicked in. Once I had it off the ground I looked and saw the B2 piston cover had never popped back out. I removed the cover, transmission pan, valve body(s) and took the piston completely out. Cleaned everything, put it back together only this time I pushed the B2 piston out from the inside of the trany to get the cover to seat against the snap ring. The only other thing I did differently was put a paper gasket between the smaller part of the valve body (sorry I don’t know the technical name) and the steel plate. I noticed that I had gotten one with the rebuild kit so I wanted everything to be right this time. There wasn’t one there when I took it apart, but like I said it was included with the kit and all the holes lined up fine with the passages. Once again reassembled everything added trans fluid and fired it up. I put the car in gear on jack stands and the wheels turned!! Unfortunately I only have first gear now!!! I mean ONLY. In reverse, neutral and all forward gears…1st gear only. But hey… Park works!! This is no longer fun. Any ideas???? Thanks -Ron- |
trans
if you are really lucky the kickdown solenoid was either [1]jammed open or has power all the time [2]you used a sealing washer between the case and the kickdown solenoid when you reassembled. otherwise,remember that short shaft in the back of the trans the one that b2 fits onto with the band? there are two seals that fit onto the shaft and line up with the fluid passages in b2 [the rear clutch pack is 4th gear]sounds like one of those seals got cut when you were doing your labor of love. david poole european performance dallas tx.
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