[torsen] Automatic Transmission Shifting Problems - Bent Valve Body
- ABS Safe Mode
ituma at ix.netcom.com
Tue Jan 11 15:26:50 EST 2005
Howdy from Denver,
I posted this in the V6 forum as well ... just wondering if any ZF auto
transmission experts out there have a clue about the following problem ...
I recently bought a rolled '96 A6 Quattro Wagon with the 12V-V6 and Auto
Trans. I seemed to run fine, until my friend and I decieded to pull the
dented trans oil pan. We replace the filter and gasket (the dent was on
the syphon tube side of the pan). I put it back together -
professionally refilled the fluid and went to drive it. The ABS system
started automatically slowing the car down to 5mph. When I unplugged the
ABS fuse ... the ABS system doesn't come on, but the car would shift
hard from 1st to 2nd and stay in 2nd (more on this later*). Subsequent
shifts are super hard from first to second. It even shifts very hard
from P or N going into D or R at a standstill.
*The Transmission module keeps throwing a "wheel speed sensor error". If
I clear the wheel speed sensor error code using VAG-COM, it drives
smooth until I hit a certain speed in 2nd gear - in which case the hard
shifting starts all over again, until I clear the wheel speed sensor
error code from the trans module.
Recently I had to drive it in 2nd from the shop back home (about 5
miles) ... after this, the transmission started making noise when cold.
The noise in the transmission cooler lines (coming from the pump) - it's
a kind of a continuous mnam- mnam- mnam- mnam- mnam sound. After it
warms up, the noise goes away.
Ultimately my question is - does this sound like the byproduct of a bent
/ warped valve body with a leaky seal between it's two layers - esp
around 3rd gear soleniod? Would the valve body problem cause the ABS to
automatically pulse the brakes to slow the car down to 5mph (safe mode
I found a place in NJ (Ericson Transmission 1-800-388-4418) that sells
rebuilt ZF valve bodies for $450 if you send them your core. The problem
is, that I don't want to "invest" $450 more into this car if the whole
tranny is bad.
Thanks for any input on this one ... it's really kicking my bu|t.
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