1996 GMC Jimmy 6 cyl Four Wheel Drive Automatic 180000 miles
4 months ago, car would fail to go into 3rd or 4th occasionally.
Now, car will not go above 1st or 2nd.
If I start out in Drive or Overdrive, car will stay in 1st gear.
If I start out in 2nd, car will shift from 1st to 2nd. Then, if I shift into Drive or Overdrive, the car will stay in 2nd, or will drop out of gear.
Car currently gives the following trouble codes: P0135, P0340, P0301, P0758
Car also needs a rear brake line, so the brake & antilock brake warning lights are on. (Could this put me in limp mode?)
The problem of not going above 2nd gear started about 15 miles after a new fuel pump was installed.
Transmission fluid level has been kept at proper level.
I tried resetting the computer by disconnecting the battery. No help.
My next step is to get a transmission filter and fluid change. If that doesn’t help, what am I looking at?
I know one of the codes is for a shift solenoid. Is it likely a bad solenoid, or a bad connection?
Would appreciate your help very much.
have the same problem?
Tuesday, September 8th, 2009 AT 10:47 AM