Late 3-4 shift, Auto transmission, Valve Body Assembly documentation

[Coops]

Joe,

I am disappointed; I was quite exited by the idea that I could get my hands on a complete valve body.

I cannot see any other way of finding out what is wrong with mine apart from doing a side by side comparison between two parts with exactly the same number. The german workshop manual does not give specifications, and findig someone with a test rig in europe will be impossible.

The only thing that is on offer over here, in France, is a complete box (without history @ 2,500$!) as I have already paid a transmission "expert" 4000$ to rebuild my box and it is all starting to be "silly money".

I guess I will have to live with the fault even if it spoils the pleasure of driving an otherwise nice car.

Regards, Coops

[nikopu]

I also think it would be  a worthwhile exercise, if you have tried all the other routes. Have you figured out the pressure test points etc as indicated in the service/repair manual? Perhaps, these could be done using standard modern pressure measuring meter and home made tubing/connections etc.?

If you can get your hands on another valve body, the full gasket set costs about 70€. Takes a day or two to rip it apart, thoroughly clean it and reassemble. Trying this as an replacement valve body on your car could give some indication of where the problem may be.

[ja17]

Hello Coop,

I tend to think the problem may still be in the rear pump or governor. If you think it may be in the valve body, you may just want to try a lighter spring on that particular slide valve. There are good used transmissions over here for less than $500, but sometimes you have to wait for them to pop up. 

If seeing another valve body opened up could help you, we could do an on- line dissection  and documentation with one of the units I have here.

Take care,
Joe

[Coops]

Joe,

Thanks for all the time you are spending helping me on this topic.

When I had the transmission rebuilt, they changed the the rear pump and calibrated the centrifugal governor, changed all the friction plates and bands. But the trans came back with exactly the same fault as it went with. I will have to find some where to get hold of a valve body (or "shifting sleeve housing" BBB) to be able to compare them side by side.

I do promise that I will update the technical manual when I find the problem!

Rgds, Martin