Engine/Transmission (1998.5 - 2002) transmission question

[Fyrmen]

A friend has a 2001 and his transmission is shifting back and forth between gears at 35 mph. Any ideas what is causing this and or solutions?



Thanks!

 

[JTeague]

The easiest thing to try first would be resetting the APPS. Just unhook the batteries for about 30 min and reconnect. Turn the key on to the run posistion, vehicle not running, and slowly push the throttle to the floor and then slowly release it to the idle posistion. Then cycle the key on/off and start and road test the truck. This will more than likely fix your problem. I have done this personally and have had success. IF it does not you may have a faulty APPS, excessive electrical noise, faulty Gov Press solenoid and or transducer, faulty output speed sensor, or possible internal trans problem. a scan tool would be helpful in finding the problem quickly. Check the PCM for DTCs.

 

[bgwhtjp33]

We see this a lot in the shop I work in, check for codes first, the gov. press. switch or the gov. press. solenoid.

 

[SnoKing]

A friend has a 2001 and his transmission is shifting back and forth between gears at 35 mph. Any ideas what is causing this and or solutions?



Thanks!

Is it shifting or it the TC locking and unlocking. If it is the TC, then DTT has a filter to install that fixes that issue. SNOKING

 

[DieselMinded]

Mine does the same thing Reset the Apps and mine is fine for a week and then it needs reset again ... i got tired of resetting it so when it starts acting stupid I just floor it.



DM