jkirkpatrick

Is this happening on the 2012s as well? Just wondering if it is a jeep thing or if it's limited to the 2001-2011 autos only.

Steamboat Jeeper

Part of the charm of owning a jeep. Didn't cost a dime more to have that option. I have owned 5 and everyone did it with no future
issues.

DirtyDi

Is it just autos? I haven't noticed it in my '11 6 speed. I really haven't paid attention either. I'm betting I'd notice though...

pastorwug

Seems to be just autos and a malfunction of the torque converter.

20JK10

Mine does it too. Maybe it's a characteristic of the rzeppa driveshafts?

JKlad

My 2-door 6-speed does it, even when I'm reversing in low range though not as bad as in 2-high. At first I thought it was just clutch judder however then I read about the autos doing it as well, and besides it is a different sensation to classic clutch judder. Having the stock 3.21 diff gearing myself I put it down to the too-tall gearing (combined with the tall reverse gearing, which is higher than 1st) loading up the driveline; when it starts doing it I ease off the gas or pop the clutch until it stops & then slowly resume backing again.

It would be interesting to hear from people if it is more prevalent with 3.21 & 3.73 geared vehicles compared with 4.10 or greater (aftermarket) diff ratios?

JKcondrey

My money is on this. MANY of the jeeps came with 3.21 and the ratio in the transmissions reverse would make it pretty stiff which can cause a shudder in the powertrain due to lack of fuel( ie being easy on throttle). Thats one of the tradeoffs of jeep trying to get mpg ratings with that tall gearing.

catahoula

I have 2011 2 Dr. Automatic with 3.73 gears. Shutters on incline and has done it since day one.

BigRedRubi

My 2009 Unlimited w/ 3.73 does it also. Any time I reverse up an incline....the drivetrain shakes pretty significantly... Dealer has no clue...

RanchoRubi

X2. My 2010 does same thing. all my other parts are tight and trans is fine. Just for kicks, put it in 4WLO and try it. with the idle up and gearing, you probably won't notice it.