1998 Grand Cherokee overdrive whines
My 4.0 Grand Cherokee with 144,000 mile makes a whining sound when it shifts into overdrive. If I push the OD button to turn off the overdrive the noise stops or if I let off the gas it seems to stop also. I thought it was a differential at first but it seems to be isolated to the OD.
Sounds like the front pump on the transmission is cavitating, or sucking air, because the transmission filter has become clogged. Try having the transmission fluid and filter changed and I think you will solve the problem.
Thanks a lot, I'll give that a try and let you know what happens. Do you recommend using a synthetic fluid?
I just had a transmission replaced on my 97 " JEEP LAREDO..all new fluid, filter, ect..my jeep is doing the very same thing. It is a used tranny, not brand new...and its not the transfer case( I just had that checked today ) I am thinking TORQUE CONVERTER ?
PRESSURE SENSOR POSSIBLY AND PRESSURE SELENOID
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