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Jeep GC wont go into O/D
#713881
06/02/10 01:05 AM
06/02/10 01:05 AM
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Joined: Jul 2003
Posts: 1,143 Imlay City, MI
DTT
OP
super gas
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OP
super gas
Joined: Jul 2003
Posts: 1,143
Imlay City, MI
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I posted this in the Jeep forum, but never got an answer.....So Ill try here.
My 94' Jeep Grand Cherokee Laredo 4.0 all the sudden does not go into O/D. I tried cycling the switch and I dont get a light at all to show it on or off. The vehicle has about 213,000 miles on it but has been well maintained all of its life.
I noticed the problem when getting on the expressway and not having any speed. It felt like it was in high gear and it the power was gone. If I roll away from a stop and shift manually it acts fine, except it will not go into O/D. I believe the default setting for this trans is 2nd 3rd gear, and maually you can shift from second to 3, but not O/D. Im not sure if I should look into my solenoids in the trans (Gov and TCC or O/D) or if theres something else common to check...not having any response from the O/D switch somewhat raises a concern.
Ive checked the fluid and all looks well there. I am going to investigate the fuses in the PDC tonight and attempt to get trans codes, though as I understand it it flashes the O/D light...which isnt coming on currently, so I dont know if that will work. Any help is appreciated. Thanks!
::::UPDATE:::: Last night found that my TCU fuse was blown. If I replaced it my O/D light came back on and the trans shifted and acted normally. After I went about a mile, it started acting up again. Pulled over and found the fuse was blown again.... Is the TCU itself problematic? Does anyone have a diagram showing power feeds for this circuit?? Thanks
1978 Pro Street D100
1936 Dodge truck (Hot rod)
1957 Plymouth Plaza
1962 Chrysler 300
1964 Dodge 440
1995 Jeep Grand Cherokee
1971 Big Block Demon (Dads)
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