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TCC locking in reverse

mgolden

NAXJA Forum User
Location
Longview, WA
Okay, here's a weird one. My friend's 2000 XJ 4.0/AW4 locks up the torque converter clutch in reverse intermittently causing the motor to drag down and stall. It shifts into drive fine, but reverse it stalls about 50% of the time.

We pulled the transmission pan and changed the filter - the fluid was pretty dark but didn't smell burnt. I tested all 3 solenoids and they're all within spec - 13.4 ohm. I pulled them and cleaned them anyway, the O-rings looked fine.

So I'm guessing it's an electrical gremlin causing this. I checked and didn't see any obvious rubbing wires on the tranny harness or anything like that. Any ideas? :dunno:
 
How do you know it's the TC?

Disconnect the TCU and try reverse again.
 
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