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V8 and V6 Transmissions / Driveline (6L80 / 6L50 / TR6060 / AY6) Driveshafts | Differentials | Gears | Rearends | Clutch | Shifters

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Old 07-03-2011, 05:56 PM   #1
Turbobitt
 
Drives: 2010 2SS
Join Date: Dec 2009
Location: Southington, CT
Posts: 24
Started to install my JRE posi mod and look what I found

Dissassembled my differential yesterday and was surprised to find the driverside bearing cap cap had signs of cap walk with material transfer on at least one surface. The iron differential halfs had the same material transfer. Pictures are attached. Sorry for the poor quality but I wasn't prepared with a good camara.
Some history on the car-
The total mileage is 15,000. Car is completly stock except for the MGW shifter. I raced this at the track once for about 10 passes on a track rental. I did have very bad wheel hop. Shortly after the track, I broke the passenger side axle doing a burnout and powershifting into second. I noticed after the broken axle, the posi was very week and would easily spin one tire on wet road conditions. The dealer covered the axle under warranty and gave me the run-around on the weak posi.
Over the winter, I decided to purchase DSS axles and install the JRE posi mod at the same time. I just got around to installing these yesterday. The posi mod worked very well with no noticable chattering. Followed the instructions and went smooth. Cleaned up cap and differential surfaces and reassembled. At this point, I wish I bought the JRE caps and the LPW differential cover.
Sorry if this topic has been beaten to death. I didn't do a search to see if this is typical. I was surprised to see this since I only taken this to the track once.
Allan G.
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Old 07-03-2011, 06:11 PM   #2
jdenotter

 
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Drives: 2010 2SS/RS,M6,Black w/CGM Stripes
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Ya these cars don't so well power shifting. I wouldnt suggest doing it. I run my car hard and never once broke an axle.

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Old 07-03-2011, 08:33 PM   #3
JANNETTYRACING
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Drives: YELLOW 2013 ZL1 AUTO
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Quote:
Originally Posted by Turbobitt View Post
Dissassembled my differential yesterday and was surprised to find the driverside bearing cap cap had signs of cap walk with material transfer on at least one surface. The iron differential halfs had the same material transfer. Pictures are attached. Sorry for the poor quality but I wasn't prepared with a good camara.
Some history on the car-
The total mileage is 15,000. Car is completly stock except for the MGW shifter. I raced this at the track once for about 10 passes on a track rental. I did have very bad wheel hop. Shortly after the track, I broke the passenger side axle doing a burnout and powershifting into second. I noticed after the broken axle, the posi was very week and would easily spin one tire on wet road conditions. The dealer covered the axle under warranty and gave me the run-around on the weak posi.
Over the winter, I decided to purchase DSS axles and install the JRE posi mod at the same time. I just got around to installing these yesterday. The posi mod worked very well with no noticable chattering. Followed the instructions and went smooth. Cleaned up cap and differential surfaces and reassembled. At this point, I wish I bought the JRE caps and the LPW differential cover.
Sorry if this topic has been beaten to death. I didn't do a search to see if this is typical. I was surprised to see this since I only taken this to the track once.
Allan G.
Great Pics of Very real Problems we see regularly with these rears.

We address all of this with Our Mods, machining and set up during overhauls of our Complete pumpkin packages.

Your Definitely a candidate for our Billet Caps, We find the bores of the stock caps oversize frequently.

Thanks for the Props.

Ted.
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Old 07-03-2011, 10:05 PM   #4
SC2150
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Good thing you found it when you did! We are installing a SS diff w/the Jannetty diff pak in Gretchen the twin turbo V6...can't wait.
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