Thread: Early RR ZF auto weakness

The only fault I am aware of is that if you had the car in drive then went to neutral and revved it over 2000RPM for more than say a minute, you would burn out the clutches because the hydraulic fluid would keep the clutches in engagement..
This was highlighted in a USA EPA directive, not to do that in emission tests.
There is no definitive date, but around 1998 a bleed hole was addded to the clutch pack to prevent this happening.
Any car you look at now will have plus 200,000Km, so either the transmission has been replaced, or it has lasted a long time.
It is a great transmission.
Regards Philip A

Ok thanks. I was told that I could do this test to check out the state of the auto :

<div class='quotetop'>QUOTE</div><div class='quotemain'>To check out the auto and torgue
converter, put it in gear and put your foot had on the brake, you should
start to feel the motor dying around 2,000 revs, but do not do this too long
as you can cause damage.[/b][/quote]

Yes that is OK. It tests the torque convertor. But it will quickly overheat the transmission.
Ido not know how you tell good from bad though!!
I read that in common with many other transmissions, its the time taken for drive to engage as you switch from drive to reverse.
Also a common fault of a dying transmission is for it to hold onto first on the first shift of the morning. This is the governor sticking. So be suspicious if a car is always warm when you see it.
Read the Ashcroft transmissions site for full diagnostics.
Regards Philip A