Has your ZF milkshaked poll - POST 2012 ONLY

[prydey]

well, i have read all the threads on the subject, and i still don't believe the problem is that prevalent.

i believe those that are unlucky enough to have failures early on, are due to residual casting sand getting in to the exchanger and acting like sand paper. these would be covered under warranty anyway.

failures later in life are more than likely the result of incorrect maintenance of the cooling system.

i just had my gearbox serviced @ 160000km. no massive difference between before and after except the 'shunt' when selecting first gear whilst rolling to a stop is gone. i fitted a new exchanger at the same time.

i'm aware that many people have bypassed the cooling system with no apparent negative side effects, but that doesn't mean there aren't any. oil temp warm up and stability will be better when cooled via coolant. why else would every manufacturer use this method.