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Thump/slap after rear pinion seal replacement #5079311
04/18/19 09:55 PM
04/18/19 09:55 PM
Joined: Nov 2016
Posts: 1,358
WI
HoosierJeeper Offline OP
HoosierJeeper  Offline OP

Joined: Nov 2016
Posts: 1,358
WI
I took my Liberty in for Monday to get the rear pinion seal replaced since it was leaking (194k!) and got it back, no issues. Drove about 200 miles since then. Today it started making this noise that sounded like a spoon or something got caught in a rear tire, after about 10 miles it got super loud. I noticed when I let off the guess is when the sound happened, on the gas it was quiet so figure it's rear diff related. (nothing in the tires obviously). I dropped it back off at the shop tonight so he can look at it tomorrow. Any ideas on what it could be? The driveshaft felt normal going into the diff and I didn't see anything obviously wrong.

Thanks!


15 Jeep KL Limited V6: Formula Shell 5W20
07 LR3 SE V8: Maxlife 5W30
05 Jeep KJ Limited: PHM 5W30
96 Jeep XJ Country: STP HM 5W30 (winter)
Re: Thump/slap after rear pinion seal replacement [Re: HoosierJeeper] #5079318
04/18/19 10:04 PM
04/18/19 10:04 PM
Joined: Jan 2017
Posts: 2,968
VW Fanboy Island
maxdustington Online content
maxdustington  Online Content

Joined: Jan 2017
Posts: 2,968
VW Fanboy Island
Originally Posted by HoosierJeeper
Today it started making this noise that sounded like a spoon or something got caught in a rear tire
You're probably OK until it sounds like a fork is stuck in the tire.


03 Jetta AWP/09A 210k kms
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Re: Thump/slap after rear pinion seal replacement [Re: HoosierJeeper] #5079338
04/18/19 10:27 PM
04/18/19 10:27 PM
Joined: Nov 2016
Posts: 1,358
WI
HoosierJeeper Offline OP
HoosierJeeper  Offline OP

Joined: Nov 2016
Posts: 1,358
WI
I'd say it went from spoon to spork to fork to butcher knife stuck in the tire!
Seriously, it's very rotational, which lead me to think it was something in the tire. But the whole on gas/off gas thing rules that out and it was from the rear.


15 Jeep KL Limited V6: Formula Shell 5W20
07 LR3 SE V8: Maxlife 5W30
05 Jeep KJ Limited: PHM 5W30
96 Jeep XJ Country: STP HM 5W30 (winter)
Re: Thump/slap after rear pinion seal replacement [Re: HoosierJeeper] #5079347
04/18/19 10:45 PM
04/18/19 10:45 PM
Joined: Jun 2012
Posts: 2,025
USA
oldhp Offline
oldhp  Offline

Joined: Jun 2012
Posts: 2,025
USA
Sounds like the pinion nut backed off.


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Re: Thump/slap after rear pinion seal replacement [Re: HoosierJeeper] #5079406
04/19/19 01:46 AM
04/19/19 01:46 AM
Joined: Dec 2016
Posts: 8,898
Waco, TX
Linctex Offline
Linctex  Offline

Joined: Dec 2016
Posts: 8,898
Waco, TX
Damaged axle bearing?

Anyway, take it back right away and have them make it right.


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Re: Thump/slap after rear pinion seal replacement [Re: oldhp] #5079452
04/19/19 04:50 AM
04/19/19 04:50 AM
Joined: Feb 2013
Posts: 3,587
Central Virginia
Silverado12 Offline
Silverado12  Offline

Joined: Feb 2013
Posts: 3,587
Central Virginia
Originally Posted by oldhp
Sounds like the pinion nut backed off.

That's my guess too. I had a 1974 C-10 and it showed your same symptoms when the nut worked its way loose.


12 Chevy Silverado ext. cab LS, 2WD 4.3 auto
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Re: Thump/slap after rear pinion seal replacement [Re: HoosierJeeper] #5079490
04/19/19 06:20 AM
04/19/19 06:20 AM
Joined: Nov 2016
Posts: 1,358
WI
HoosierJeeper Offline OP
HoosierJeeper  Offline OP

Joined: Nov 2016
Posts: 1,358
WI
Would that have done damage to the axle? Or once he tightens it will it be ok?


15 Jeep KL Limited V6: Formula Shell 5W20
07 LR3 SE V8: Maxlife 5W30
05 Jeep KJ Limited: PHM 5W30
96 Jeep XJ Country: STP HM 5W30 (winter)
Re: Thump/slap after rear pinion seal replacement [Re: HoosierJeeper] #5079535
04/19/19 07:12 AM
04/19/19 07:12 AM
Joined: Nov 2006
Posts: 21,979
MA, Mittelfranken.de
Trav Offline
Trav  Offline

Joined: Nov 2006
Posts: 21,979
MA, Mittelfranken.de
I don't know how this diff is set up but the pinion depth may need to be checked/set. It needs a thorough inspection anyway so I would probably use someone else to do the job.


ASE L1, Master. Deutsch Meisterbrief.
Re: Thump/slap after rear pinion seal replacement [Re: HoosierJeeper] #5079745
04/19/19 10:34 AM
04/19/19 10:34 AM
Joined: Jan 2015
Posts: 1,150
missouri
ragtoplvr Offline
ragtoplvr  Offline

Joined: Jan 2015
Posts: 1,150
missouri
Loose driveshaft strap. Thrown U joint cap.
sometimes the simple stuff does not get checked.


Rod

Re: Thump/slap after rear pinion seal replacement [Re: HoosierJeeper] #5079822
04/19/19 11:38 AM
04/19/19 11:38 AM
Joined: Aug 2011
Posts: 181
Va.
Piston_slap Offline
Piston_slap  Offline

Joined: Aug 2011
Posts: 181
Va.
I hope you got the same shop to replace it under warranty. That's a sorta important small thing. crzy


1994 Ford Econoline w/302 & 4R70W
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