MJ driveline rumble & slippage

Since my XJ is totaled and I'm awaiting settlement, I've been trying to bring my MJ on-line before they pull the plug on the rental. Here's the trouble - I have slippage under load (ie climbing a grade) and a rumble/rattle/vibration under the same conditions as well as coast under power. With the slippage you can hear the rpm's climb then a rumble/vibration will begin and the MJ will begin to move somewhat faster.

My neighbor and I dropped the tranny and t-case thinking it was the clutch causing the slippage. We found an almost new clutch w/ no glazing, a new slave cylinder, and new resovior as well. So clutch isn't it ... bad bleed on slave cylinder maybe? Neither explains the rumble and vibration though. Thoughts???

I need something running in under a week, so if this can't be an easy/cheap fix the MJ is for sale and I'll pick something else up to run. $700 is what I have in it and is what I'd need out of it.

Thanks!

Yes ... It does sound like a clutch problem. Did you guys check to make sure the clutch was adjusted properly?

Les

lbexj said:

Yes ... It does sound like a clutch problem. Did you guys check to make sure the clutch was adjusted properly?

Les

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Neither one of us is real good with hydraulic clutches. Can you explain the proper way to adjust it?

Thanks!

PA Highlander said:

Neither one of us is real good with hydraulic clutches. Can you explain the proper way to adjust it?

Thanks!

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For what it's worth, my 1986 does exactly the same thing. It's referred to as deiseling. I'd like to know how to adjust it as well.
Mine has been a very distinct growling under acceleration, that dropping back a gear seems to end until I fall under a certain RPM in each gear.

This is one of those times you wish Brandon (The 2.8L / 1984-1986 XJ authority) was still posting here. Anybody got his e-mail addy?

Got the whole mess back together tonight ... now I have no pedal Next to no pedal travel and completly spongy. I think the slave cylinder may not be seated correctly, had a rough time getting it in place. I guess Saturday I'll pull it back off and re-install. I'm really losing my patience at this point ...

PA Highlander said:

Got the whole mess back together tonight ... now I have no pedal Next to no pedal travel and completly spongy. I think the slave cylinder may not be seated correctly, had a rough time getting it in place. I guess Saturday I'll pull it back off and re-install. I'm really losing my patience at this point ...

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is just the disc new or is the pressure plate new as well?

is there anything saturated with oil? I had similar problems w/ my old 2.8/ax5 and it all stemmed from the flywheel being slightly warped. it only costs $10-$20 to have it resurfaced, and that makes a HUGE difference