Thread: Auto transmission fluid change?

They would be talking about a standard pan drop and filter change. A complete flush certainly wouldn't hurt though.

Depends on what you tranny fluid is like, if it smells burnt or is a filthy brown then a full flush would be a good idea. Get a filter kit at least when you change it.

The fluid is kinda clean, but as I purchased the car a few months ago, I dont know when it was last given a transmission service.

I am going to do a filter change but just keen to know what the best transmission fluid is for a 1990 V8 ZF box?

I will be doing the diff and transfer box too.

Personally I'd go to the Penrite website & check........ personal preference.
Penrite Oil - A Better Class Of Oil

transmission fluid is for a 1990 V8 ZF box

?

Undoubtedly Castrol Transmax Z which is approved by ZF for 4HP22 .

BUT you may not like the price about $90 for 4 litres which is what you need for a partial change.
I have used it now for 50KK or so in my ZF and BW transfer, now at 190KK and perfect.
Regards Philip A

Thanks for the advice everyone.

I was going to go with the Castrol Transmax M, but did some research after Philip A recommended the Transmax Z which has some good reviews; smooth gear shifts etc.

My only concern is that it is a synthetic fluid. I know that synthetic engine oils are known for leaking, would this be the same for synthetic transmission fluids?

My ZF box already has a couple of minor leaks, normal?


Cheers!

It may cause existing leaks to get a bit worse as it has a lower falling number.
Mine initially had a leak at the oil pump and the workshop who replaced my rear main had it repaired at the same time. No further leaks since.

Regards Philip A

Whats the price of a gasket and filter kit for the ZF. Who is the preferred supplier?

Didiman