another 320i autobox problem - strange!

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oli-b
E30 Zone Newbie
E30 Zone Newbie
Posts: 19
Joined: Wed Jul 01, 2009 11:00 pm
Location: Devon

Fri Aug 14, 2009 12:25 am

i posted up here a while ago regarding my 320 auto having no reverse gear. as i've been a bit skint i've not had the cash to replace it so have been making do...

the thing is it will reverse fine after being driven for 10 miles or when the engine has warmed up.
sometimes if it hasn't been driven far enough, if you put it in reverse and rev the engine it jumps back and starts working.
i've checked the fluid and it's bright red and to the correct level and the are no leaks.
just seems strange to work when warm and not when cold. any help appreciated.
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ProToZyKo
E30 Zone Regular
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Joined: Mon Dec 17, 2007 11:00 pm

Fri Aug 14, 2009 3:40 pm

Hm possible broken valves, can't build the pressure when cold but when warm the box expands and the valve can let in oil again, just a guess, you need to speak with someone that knows more about this.
I had a problem that it wouldn't gear when cold, stayed in 1st gear for a long time, problem here was valves.
Could also be filthy governor, think box can stay in car while fixing it.
Does it brake on low gear when cold? What about when warm?
Andyboy
Alpina Colada
Posts: 12576
Joined: Mon Sep 11, 2006 11:00 pm

Fri Aug 14, 2009 4:12 pm

Try fitting another valve block - very easy job with the sump off.
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