Mrmerlin

Sorry to hear of this issue Bill, lets give things a chance, your in good hands with 928 community.
First see if the mechanic has any thoughts about the trans in your car.
Greg B may have a trans you could have but I need to chat with him,
it might be the one from the 87 Granit green car if he still has it, I will give it to you.
Dont despair a lot of people have your back, Stan

Danieldd

I agree on giving the mechanic an opportunity to diagnose it and make it right. If he is really a sincere and honest guy, then he R&R the transmission and fix it for you, gratis. Hopefully you won't be screwed after all. Expect the best and keep us informed.

Landseer

Bill,

Am sorry you are having problems with it.

Its just mechanical stuff, don't let it defeat you, you will win.

I have most of the innards of an 84 4speed box carefully stored in my basement, in the event you need parts that might cross-reference to your 89 box. Free to you for the cost to send them.

T_MaX

Clean up the garage, put away tools, close garage doors, wash-up, change cloths, have a drink and take a few days off from thinking about your car.

This exact scenario has happened to me with a 5.0 mustang, turned out I damaged the front pump when installing the new high stall TQ that was also defective.

the flyin' scotsman

PM sent Bill

Gary Knox

Bill,

SO sorry to hear this - as Nicole said - after you've put so much work into it. Please keep us advised as you work through the problem. The 928 Community will NOT let you get away, so we have to find someway to get the mechanic to make this right for you.

Thanks for all you've done for us, please let us (even those that are far away) know how we can be helpful.

Gary Knox

Glen McCartney

Bill, sorry to hear about this, really sucks with all the work to get the tranny out and back in.
When I decided too have Steve Cattaneo rebuild mine, I was contemplating removing it myself and dropping it off to him. He talked me out of it (wasn't that much more in labor charges believe it or not) and boy am I glad. Two weeks after I got it back, it wouldn't shift from 3rd to 4th when it got hot. Called him up, brought it right back in. He had to pull it and found that one of the large thin o-rings had burst, said must have nicked it in reassembling. He fixed it right away, made it perfect. Try to get the rebuilder to make good and care of it. Have it flat bedded to him.

andy-gts

where is steve catteno and how do you get a hold of him?

Daniel Dudley

He is in NY, South of Poughkeepsie. Really knows the 928 auto box.

Mastertech transmissions.

borland

Sorry to hear that Bill,

Perhaps if you simplified the transaxle removal and reinstallation, things would go smoother.

One thing I would recommend, is removing the transaxle from the torque tube first. Less weight to handle makes things easier. For this you need to use a transmission jack with tilting base. Since the engine/torque tube tilts back more to clear the transaxle/battery box interference, the front cross brace needs to be removed.

Another suggestion, is keeping the rear coilovers attached to the car. Instead, disconnecting the shocks at the pivot pin. The crossmember will be lighter and easier to handle.

It's hard to tell exactly what that noise is, but I'd say that your Mercedes mechanic probably failed to check extensive fitup clearances prescribed in the WSM. There are several measurements prescribed that are not easy to understand at first glance, but important. Shims and friction steels are available to make adjustments.

If you decide to do a full teardown, replacement 'hard parts' costs can go up dramatically. Most rebuilders realize this, and only change parts needed to get through the usually 12month warranty. Knowing what parts to replace can be difficult. One advantage of a full teardown is the ability to replace all the seals which can be done at very low cost. Ordering parts for these old transmissions can cause delays too.

Thanks for posting.

Imo000

Might want to read this first: https://rennlist.com/forums/928-foru...ns-woes-3.html

Bill Ball

Yes, I just learned about that shop - thanks for seconding the recommendation!

Bill Ball

If it still makes the noise after this weekend, I'm going to have another 928 guy who knows trannies come listen to it on Monday and give me a second opinion. He also knows the rebuilder in question. [EDIT: Now that it is leaking as well, he'll be coming over to confirm the problems and help me decide what to do from there.]

Erik N

+3 for the shop above, if it is the one at Old County and Industrial (or Broadway, can't remember which).

Fixed my wife's MBZ about 8 years ago. Stacks and stacks of trany's in there.

Bill Ball

Yes, I think these trannies are very durable. I beat the living crap out of mine, especially when I had the supercharger.


and it has been through 7 or 8 open road races at 145 MPH average for 100 miles, topping out at 170 MPH and cruising for miles at 160+. Tranny was never a problem. I did fluid & filter changes like religion every 30K miles, mostly with Mobil 1 synthetic. The fluid was always clear, red and I never found sediment in the pan. I saw the friction discs the rebuilder replaced - they looked close to new. He was +/- on replacing them. All the tranny really NEEDED was a TC seal and primary pump o-ring and even that would not have been needed had I not tried to replace them with the tranny still in the car. They were not leaking until that attempt and I only did that because I had replaced the TC cover bearings, also which were not needed and the seals are a WYAIT task. In other words, the tranny was perfectly OK until I started down the road of replacing things because it had gone 240K miles.