flinn

Hey new to this forum so here goes!!!! 2000 Jeep Cherokee 90,000 miles while driving down the road 55-60-mph lock-up torque will slip in and out!!! any ideas???? no check engine light fluid clean and recently flushed problem seems to be getting worse...... any ideas???? Love my Jeep lookin for any ideas!!!!

Chex_Mex

did it start after the flush?

93gc40

Why Do you ask?
I have same issue, and YES, or at least I notice it more after fluid and filter change.

Chex_Mex

hrmm, from what i know (and i dont know much) the gears shift using hydraulic pressure from everything spinning in the t-case (someone correct me if i'm wrong)

doing a flush could have lossened gunk inside the tranny, and if you have some debris blocking a port, could cause the pressure in the port to fall....causeing the disengagement of your tranny? this is just a theory here (any1 correct me if i'm wrong)

so the pressure falls, tranny disengages.....the debris falls due to lack of pressure, pressure builds up in the port again, locks back up....and so goes the cycle

Check out: http://auto.howstuffworks.com/automa...smission10.htm

or it could be your lockup clutch:

http://auto.howstuffworks.com/auto-p...converter4.htm

fishtaconc

I agree with the others, but there is an outside chance you have a caliper hanging up slightly, I had 2 vehicles this happened too. Trans would lock/unlock because of the drag.

U.A.V.jeep

I have heard the same thing about transmission flushes.

fishtaconc

Ive been told that the flushes tend to damage the front pump seal, causing leaks....back on topic now

U.A.V.jeep

Mine leaks but never had a flush done... maybe if I flush it some gunk will seal the leak! LOL

Chex_Mex

now that's thinkin, u must b an optimist