Are you still on your original tranny?

[e34musician]

I use royal purple synthetic Dexron III, about 3 or 4 bux a quart, you will need 4 when you change the filter out. Got my filter and gasket from BMAparts.

You might want to contact Kirt about the reverse issue you have and see what he says about it too.

Thanks, Jeff and all replys. Will check with Kirt if the reserve engage jerk is normal.

Another quick question, I learn that only ~50% of original fluid will come out. Can I just add the royal purple systhetic dexron III (mix with original fluid) into the system? Will this cause any issue?

[Bimmerman]

My car has the original 5 speed ZF auto (5hp18) with dubious service history. just clicked over a quarter million kilometres with no problems (fingers crossed) I only replace what comes out when i service it

[mikell]

212,000 miles on my original ZF

[Ross]

Let's talk about your clutch though.

[BillionPa]

if you are gonna be doing a change on the 540, do 2, the 2nd one 5000 miles after the first one. that will get the fluid cleaner without shocking the tranny.

[Thayne]

Still on mine.

[uscharalph]

269,000 miles and still going strong.

[JMI]

... also changed relay just incase all seems good

Which relay are you referring to?

TIA