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Very Odd rear end noise while making Left Turns.....

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Old Jan 9, 2015 | 01:26 PM
  #91  
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Originally Posted by 00DakDan
To the best my knowledge, '97 up are 29 spline.
How many splines for 9.25?
 
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Old Jan 9, 2015 | 02:43 PM
  #92  
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Originally Posted by Dodgevity
How many splines for 9.25?
31, at least for 2nd Gen and older.
 
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Old Jan 21, 2015 | 09:11 PM
  #93  
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Originally Posted by alaskajeff
Basically the mechanic miss ID'd the rear end and didn't put in the Friction Modifier. Took it back in this AM. They redid the job to include adding in the Friction Modifier (which BTW they didn't have and had to special order/deliver in). The mechanic showed me there is NO physical damage visible to anything inside the differential.

The owner had the gall to Charge me and additional $31 for the Friction Modifier. I was dumb enough pay. (Kicking myself now....)

Thing that really sucks is the rear end is still making the same grinding/crunching noises. Obviously, the LF clutch pack on the axle is bound up. Probably worn out clutches on that side.
Update.

I have not driven the truck very much (50 miles or so) since the diff oil was changed out (to include the Friction modifier).

On last drive around, I noticed a marked DECREASE (not totally absent) in crunching/grinding noise emitting from the Left Rear axle! Much less noise.

Perhaps the rear end clutches needed time to absorb some Friction Modifier. ????

Perhaps the Friction Modifier from the old diff oil was worn out. ???
 
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Old Jan 21, 2015 | 09:22 PM
  #94  
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Did you take the truck and do several figure 8's after the change? It helps work the new oil into the clutches.
 
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Old Jan 21, 2015 | 09:26 PM
  #95  
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Originally Posted by 00DakDan
Did you take the truck and do several figure 8's after the change? It helps work the new oil into the clutches.
Yes I did.
 
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Old Jan 24, 2015 | 11:42 AM
  #96  
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re changing out your Rear Diff fluid yourself

Just be sure to add the antislip package ..My garage uses fluid with it already added...Chrysler charge for the extra package

I had a GMC Jimmy (1500) that would creak and groan when the ant-iislip additive was getting old.


Sorry guys..didn't see all the replies after the original post..answers were fight on from my experience
 
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Old Jan 24, 2015 | 11:47 AM
  #97  
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Originally Posted by jwalton1943
re changing out your Rear Diff fluid yourself

Just be sure to add the antislip package ..My garage uses fluid with it already added...Chrysler charge for the extra package

I had a GMC Jimmy (1500) that would creak and groan when the ant-iislip additive was getting old.


Sorry guys..didn't see all the replies after the original post..answers were fight on from my experience
Good tip.

So if the friction modifier in my truck's diff was old or NOT even added in the first place (from Previous owners), then WHY would only (1) side be affected ?
 
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Old Jan 25, 2015 | 09:19 AM
  #98  
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My Jimmy only made noises on one turn


I think it has to do with the configuration of the offset of the pinion and ring gear as it enters the differential or some other internal config in the set up of the clutch package
 
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