242 Grinding in 2wd ????

bronco · 11-03-2009, 12:02 AM

89 XJ , 242 t-case .

> Grinding noise in 2wd. Set on jack stands and noise is from the t-case .
> Fluid is clean with no metal or contaminants .
> Even not running and just spinning a front wheel it turns the t-case via the driveline and makes the noise at the t-case .
> Is this the chain rubbing the inner case or are the 242's known for bearing failures ?
> Checked the linkage & even manually ran it through it's range of motion with no change .

> Any idea's would be greatly appreciated . Thanks ....

ryan86jeep · 11-03-2009, 08:46 AM

id say bearings
they arent prone to bearing falure, but bearings do go bad if you drop the front shaft and spin the front output do you hear/feel anything?

bronco · 11-03-2009, 10:27 PM

> I pulled the t-case and drivelines , front output feels very smooth and theres no sign of the chain contacting the cases .
> The planetary assembly nearest the rear driveline is pretty noisy , even just spinning it by hand .
> No signs of gear wear or damage .
> Could it be that there is enough wear at 200,000 miles that lash between them is excessive and there go the noise ???

>> Thanks again for any ideas <<

11-03-2009, 12:02 AM	#1
bronco Registered Join Date: Jan 2009 Location: Ore. Posts: 9 Thanks: 0 Thanked 0 Times in 0 Posts	242 Grinding in 2wd ???? 89 XJ , 242 t-case . > Grinding noise in 2wd. Set on jack stands and noise is from the t-case . > Fluid is clean with no metal or contaminants . > Even not running and just spinning a front wheel it turns the t-case via the driveline and makes the noise at the t-case . > Is this the chain rubbing the inner case or are the 242's known for bearing failures ? > Checked the linkage & even manually ran it through it's range of motion with no change . > Any idea's would be greatly appreciated . Thanks ....

11-03-2009, 08:46 AM	#2
ryan86jeep Registered Join Date: Dec 2002 Location: Hopewell, Nj Posts: 6,045 Thanks: 0 Thanked 10 Times in 10 Posts	id say bearings they arent prone to bearing falure, but bearings do go bad if you drop the front shaft and spin the front output do you hear/feel anything? __________________ .................................... 86' Cherokee.. 2.8L..3" lift, 256,000 miles original trans motor rears tc...~Electric fan... ~Custom Switch panel on glovebox..~Custom overhead console..~Rear auxilary lights.. 94' Grand Cherokee (DD)5.2L V8~242~Preformance ECU~Custom TurboCity Dual Intake W/ K&N Filters ~ML Headers~Custom Made Dynomax 3" Header-Back Exhaust ~3.5" RE~31's~5.9 E-Fan~UberRare Red 5.9hood :happpyd: ~RE adj. front trac bar~RE super flex adj. control arms ~Rear Tire Carier~Remote Start~MX6 Shocks Soundclip of my Exhaust (right click and save as) 89' Grand Wagoneer (Ours) 360 D44s FOR SALE, new motor 3k ago, rebuilt trans 9k ago My Webpage(in the making...still....)

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11-03-2009, 10:27 PM	#3
bronco Registered Join Date: Jan 2009 Location: Ore. Posts: 9 Thanks: 0 Thanked 0 Times in 0 Posts	> I pulled the t-case and drivelines , front output feels very smooth and theres no sign of the chain contacting the cases . > The planetary assembly nearest the rear driveline is pretty noisy , even just spinning it by hand . > No signs of gear wear or damage . > Could it be that there is enough wear at 200,000 miles that lash between them is excessive and there go the noise ??? >> Thanks again for any ideas <<