Re: E28 M535 Automatic Transmission

[Henri Baccouche <henrib@xxxxxxxxxxxx>]

Get the ZF factory rebuilt 4HP22EH with all the updates.......
End of problems. 1985 ZF 4HP22EH Automatics in that model had many engineering
revisions.

The manual trans refit requires a new driveshaft,flywheel and clutch .....
Too much work and $$$$ or CH Fr.

Henri



Dany wrote:

> Hi,
>
> I own an E28 '85 M535iA with an automatic transmission with a mileage of
> around 100K.
>
> I have a problem with the transmission. When I put the shifter on 1st gear,
> everytime when I cruise around 3500 rpm or more and be at a stable speed, the
> second gear is engaged for one or two seconds and then comes back first
> repeately, but if I accelerate, it doesn't do it. It only occurs when I
> release the accelerator to be at a stable position and a stable speed. I have
> changed the ATF oil and have installed at the same time new pipes on the
> transmission coling line, they where bad, but it did'nt resolve the problem.
> Do I need to replace or rebuild the transmission ?
>
> Is it possible to install in replacement a manual transmission ? Which parts
> do I need to change for that ? Do I need to replace also something like the
> computer or the chip?
>
> Thanks for your help.
>
> Dany
>
> M535iA '85 100Kmi
>
> Geneva - Switzerland
>
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