A friend of mine has 93 ZJ 4.0 with the select trac system and it has suddenly started having shifting trouble. First it started indicating that it was running in 4wd but it is not and there is a meesage saying service 4wd switch when the t-case is shifted to 4 hi or 4 lo. Also, at about the same time 1st and 4th gear went out and when shifting from park to drive the transmission selects 3rd, he can manually shift to 2nd but when trying for 1st it stays in 2nd.
TPS is testing fine but the governor pressure sensor solenoid is not closing completely but appears to be opening as it should by doing a bench test with voltage.
This jeep is strictly a street driven and bad weather vehicle for college, 214,000 miles with never having any problems and the fluids all appear to be good. My idea is that the solenoids are bad and his testing seems to confirm this. He has tried posting here on the board but has not been able to yet, this fellow lives 2 hours down the road from me and would appreciate any positive ideas before dropping coin on parts.
He can manually shift 2nd and 3rd but did not say anything about reverse.
1st and 4th are not selecting.
TPS checks good by his method.
Fluid is good and no metal in the pan.
Govenor pressure solenoid appears to not be closing completely.
Thanks for the help.
2006 LJ Rubicon 6 speed: Currie arms, Currie Track Bars (They don't hit either), Nth tuck, Nth Springs and oil pan skid, JKS mml, bml, Antirock.
I un-insatalled the wife mod.....lost one Jeep.