JTail
4/12/2007 2:15:41 PM
I have a 2001 Suburban Z71 that won't shift into overdrive. It shifts thru the first 3 gears but not into overdrive. What could possibly be happening?
golfer
4/13/2007 9:35:50 AM
Could be the torque convertor lock solenoid which engages for overdrive.
JTail
4/13/2007 11:03:34 AM
thanks, I'll check it out!
engine2
4/14/2007 10:37:05 PM
How many miles on the tranny?
ZX1100F1
4/16/2007 1:38:33 PM
Usually when a no 3-4 shift occurs it is a faulty accumulator or servo, on occasion a stuck valve or bad pump can also cause the problem.
In any case it is not a home repair, however I always recommend the fluid and filter be changed before taking it in, it is cheap and sometimes solves the problem.
JTail
4/19/2007 6:23:52 PM
90,000 miles on the tranny... overdrive is working again... go figure!!! the Service Engine light went out... dealership "cannot duplicate problem". Kinda reminds me of going to the dentist with a toothache.
