Clunk and Bang I go.. - JeepForum.com

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post #1 of 18 Old 11-08-2010, 01:22 PM Thread Starter
all3forus
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Clunk and Bang I go..

Few weeks ago. The rear end started to clunk and bang when shifting between gears. I pulled the diff cover off and looked for damage. Did not see any damage.

Checked u-joints and drive shaft, everything tight.

How do i check pinion for looseness and play?

I'm thinking it is a bearing in the pinion.

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post #2 of 18 Old 11-08-2010, 01:25 PM
MO2500
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Grab the pinion yoke and try to shake it back and forth. There shouldn't be any play there. Could also be carrier bearings and your backlash has opened up.

You sure it's coming from the rear end?

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post #3 of 18 Old 11-08-2010, 01:52 PM Thread Starter
all3forus
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Yes I am sure. It only does it when you take the load off during shifting.

I checked all my bolts on the suspension for torque and movement of bushings.

I just went out and checked pinion. It did not move much. I jacked it up and took the load off drivetrain.
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post #4 of 18 Old 11-08-2010, 02:01 PM
MO2500
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Quote:
Originally Posted by all3forus View Post
It did not move much.
Shouldn't move at all side to side. Rotation is okay unless it's excessive. That would point at an issue inside the rear end.

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post #5 of 18 Old 11-08-2010, 02:14 PM
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Quote:
Originally Posted by mo2500 View Post
shouldn't move at all side to side. Rotation is okay unless it's excessive. That would point at an issue inside the rear end.
x2
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post #6 of 18 Old 11-08-2010, 02:21 PM Thread Starter
all3forus
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It does move from side to side. Looks like it is going in the shop.

Thanks for the help
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post #7 of 18 Old 11-08-2010, 02:37 PM
MO2500
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Make sure it's a reputable shop that has experience with ring and pinion setup and setting pinion bearing pre-load with a crush sleeve. Someone that will back up there work if something were to go wrong in the first few thousand miles after would be preferred.

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post #8 of 18 Old 11-08-2010, 02:42 PM Thread Starter
all3forus
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I did find a shop here in town that does good work..They are called Six States Dist..
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post #9 of 18 Old 11-08-2010, 02:45 PM
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I say pop that rear end open and see what you can see.

If it were easy, everyone would do it
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post #10 of 18 Old 11-08-2010, 02:46 PM
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Also, check your UCA and LCA bushings as you accelerate because i had similar symptoms and this was the burden. Perfect excuse to install my adj control arms

"Run what ya brung and hope ya done brung enough"

Quote:
Originally Posted by pjleslie03 View Post
I know how bad the D35 is in the rear, but would it be bad to have one in the front?
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yes, you wouldn't be able to steer
98' TJ, 4" Superlift, JKS 1.25" BL/ 1" MML, 8k Gorilla winch, Cowl intake, D30 Aussie, shafts/D44 Powertraxx, shafts (4.56's), Rusty's Adj CA's front/ RE Adj CA's rear, Recessed tails, sway discnct'd, 152 db train horns, 34x10.5 LTB's Amer Rac/36x13.5 Irok's Streetlocks, Grenade shifter, Pioneer deck/speakers, Warn bumpers, KC upper lite mts/Slim lites, EBC yellows, 40 series Flowmaster, couple tasteful more ...
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post #11 of 18 Old 11-08-2010, 02:59 PM
MO2500
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He already popped the cover and checked (look at first post) and he already checked his CA bushings (also first post).

There is play in the pinion and that is most likely the issue. That needs to be addressed for sure.

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post #12 of 18 Old 11-08-2010, 03:02 PM
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Quote:
Originally Posted by MO2500 View Post
Make sure it's a reputable shop that has experience with ring and pinion setup and setting pinion bearing pre-load with a crush sleeve.
He has a D44, no crush sleeve...
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post #13 of 18 Old 11-08-2010, 03:06 PM
MO2500
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Quote:
Originally Posted by Knuckelhead View Post
He has a D44, no crush sleeve...
Good catch. I assumed D35 and shouldn't have

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post #14 of 18 Old 11-08-2010, 03:07 PM
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Quote:
Originally Posted by MO2500 View Post
He already popped the cover and checked (look at first post) and he already checked his CA bushings (also first post).

There is play in the pinion and that is most likely the issue. That needs to be addressed for sure.
My bad... probably should read more carefully next time.

If it were easy, everyone would do it
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post #15 of 18 Old 11-08-2010, 03:14 PM
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Tighten that pinion nut down to ~180 lbs before you take it in anywhere. And make sure the control arms are torqued down real good as well. Even then, bushings suck. They may be worn out and allowing too much movement.

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