Hey, I'm new here and need some help. Have the 96 ZJ grand with 4.0L I6 and 42RE. Had problems with shifting. in Drive its in 3rd all the time, can shift down to 2nd manually and shift back up manually but won't shift into 1st or OD. pulled code p0748 which was the Governor Pressure Solenoide, so i put in a new solenoid and sensor. Nothing changed. Need ideas. Please help me out.
oh and btw i was getting a check engine light too for governor sensor when i had just put on a new trans so i found out when the o2 sensor is bad it can give a funky reading but it does really cause loss of rpms hence the transmission having issues shifting when it should. oh and btw did you change the tranny fluid because thats what cause my first tranny to blow..long story short hose collapsed 2am on the highway and all tranny fluid leaked out then my mechanic put new fluid blew the trans then bought new one then had shifting issues due to o2 sensor
i love my piece of crap jeep :)
reman tranny. starting acting up with the old one so i had the reman one installed. still nothing so i installed a sensor and solenoid and inspected the valve body as well. all is good so i turn to electrical. im thinking a bad wire from pcm to tranny connector. i need to get ahold of a multimeter and run an ohm test to make sure
Did you ever figure this out? I'm in the EXACT same situation. I replaced my transmission and govenor pressure solenoid as well. I tested my wiring and everything checked out. The solenoid to PCM was putting out voltage under load as well so the only thing left seems to be a bad PCM.. Let me know!
1998 Grand Cherokee~7" Long arms on 35s
2008 BMW 335xi
1996 Grand Cherokee~6" on 33's~SOLD