What part of my T-case is shot? - North American Grand Cherokee Association

2drezq · 07-25-2004, 12:39 PM

OK, Here's the short version: Jack one rear wheel up (tranny in park) and crank on the lifted rear wheel and you get a "clack-clack" racheting sound from the 231 T-case as the rear drive shaft turns. Two: accelerate hard from a stop and the ZJ shudders like the something internal is slipping real bad.

I thought my tranny was dying until I jacked the rear wheel up. Anybody had a similar situation?

nate379 · 07-26-2004, 07:08 AM

So 1 wheel is up and the driveshaft is turning??

Sounds like spider gears in the rear end from what your describing.

JayH · 07-26-2004, 10:06 AM

He's got a trac loc.

Short of pulling the case and taking it apart, who knows. It's pretty easy stuff.

Jay

JeepinHank · 07-26-2004, 12:32 PM

231's have chains right?

When the chain stretched in my 242, I had a noise similar to what you're describing. Probably just need a replacement chain & a rebuiild kit.

07-26-2004, 03:09 PM

Chain's my first guess. But that's not consistent with the shuddering at all.

nate379 · 07-27-2004, 04:41 AM

Yeah 231 has a chain. The chain just powers the front axle though.

2drezq · 07-28-2004, 09:00 AM

Quote:

Originally Posted by nate379

Yeah 231 has a chain. The chain just powers the front axle though.

chain was my first thought because my '78 Q-trac sounds similar when the chain is loose in it. As soon as I saw the driveshaft turn when it shouldn't I knew it was something else.

I'm going to drop the driveshaft and check the splines on it this weekend, right after the demolition derby (no, I'm not using my ZJ!) wish me luck!

nate379 · 07-28-2004, 09:09 AM

What I don't understand is you said you have the tranny in park, you jack up 1 back tire and the driveshaft is spinning... is the t case in neutral? If it's in gear, something is wrong at the t case end.

2drezq · 07-28-2004, 09:43 AM

Quote:

Originally Posted by nate379

What I don't understand is you said you have the tranny in park, you jack up 1 back tire and the driveshaft is spinning... is the t case in neutral? If it's in gear, something is wrong at the t case end.

It is in park and the case is not in neutral. That's why I suspect the splines on the driveshaft are shot (I haven't ever had the shaft off this rig.) I hope it isn't the output shaft on the case. Would this be a good excuse to buy the SLE kit?

07-25-2004, 12:39 PM	#1
2drezq Senior Member Grand Junkie Join Date: Feb 2002 Location: North Dakota Posts: 264	What part of my T-case is shot? OK, Here's the short version: Jack one rear wheel up (tranny in park) and crank on the lifted rear wheel and you get a "clack-clack" racheting sound from the 231 T-case as the rear drive shaft turns. Two: accelerate hard from a stop and the ZJ shudders like the something internal is slipping real bad. I thought my tranny was dying until I jacked the rear wheel up. Anybody had a similar situation? __________________ Chuck R. '94 ZJ SE "Honey", Trac-Loc, 30x9.5 Yokahama Geolander AT's, Trans-cooler, 1&1/2 lift, Kolak Exhaust, K&N FIPK, ARB Bull bar, KC Daylighters Herculiner rocker panels, manual windows, multiple gauges. collecting parts for the N2O

07-26-2004, 07:08 AM	#2
nate379 Senior Member Grand Master Join Date: Sep 2002 Location: Mountain Home, ID Posts: 2,964	So 1 wheel is up and the driveshaft is turning?? Sounds like spider gears in the rear end from what your describing. __________________ http://www.98JeepZJ.com

07-27-2004, 04:41 AM	#6
nate379 Senior Member Grand Master Join Date: Sep 2002 Location: Mountain Home, ID Posts: 2,964	Yeah 231 has a chain. The chain just powers the front axle though. __________________ http://www.98JeepZJ.com

07-28-2004, 09:09 AM	#8
nate379 Senior Member Grand Master Join Date: Sep 2002 Location: Mountain Home, ID Posts: 2,964	What I don't understand is you said you have the tranny in park, you jack up 1 back tire and the driveshaft is spinning... is the t case in neutral? If it's in gear, something is wrong at the t case end. __________________ http://www.98JeepZJ.com

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07-26-2004, 10:06 AM	#3
JayH Super Moderator Grand Master Join Date: Jan 2002 Location: Maple Valley, WA Posts: 2,489	He's got a trac loc. Short of pulling the case and taking it apart, who knows. It's pretty easy stuff. Jay

07-26-2004, 12:32 PM	#4
JeepinHank Senior Member Grand Addict Join Date: Jan 2002 Location: NC Posts: 643	231's have chains right? When the chain stretched in my 242, I had a noise similar to what you're describing. Probably just need a replacement chain & a rebuiild kit.

07-26-2004, 03:09 PM	#5
Guest Posts: n/a	Chain's my first guess. But that's not consistent with the shuddering at all.

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