 Jim Grant's Tech Tips ‘94 Jeep Cherokee, No Start After Transmission Is Replaced
Q:
I just dropped my transmission in my ‘94 Jeep Cherokee to replace the oil seals that were leaking badly. I put it back in and now it won't start. Do I have to recalibrate the computer or something? Any help would be awesome...ready to go crazy!
A:
If it cranks over good but will not run I’d be looking at the crankshaft position sensor. The crankshaft position sensor is mounted in the bell housing of the transmission. The sensor is mainly plastic with very, very small wires inside. If it is hit, the engine is a no go. The quickest test is with a scan tool. With the scan tool connected to the computer go the crankshaft signal screen and crank the engine over. The computer will say yes for a crankshaft signal and no if there is not one. If no signal, a replacement sensor is likely needed.
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