Hey guys, I know its a Chevelle I'm asking about, but the differentials are the same. I installed a Powertrax No Slip locker into my 12-bolt, and ever since I have been getting a loud clattering coming from the rear. I temporaily fixed it by tightening the lug nuts, but it has come back. It only clatters when the car is free wheeling(no throttle or brakes.) I'm pretty sure it is coming from the right rear. How much play is supposed to be in the axle? I can pull the tire in and out, if I take it off, I can pull the axle in and out, just a tiny bit. I don't know what is wrong, its really embarrassing to listen to it. It isn't a bearing is it? I would think a bearing would grind and not clatter. Thanks

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1994 Polo Green Z28 A4 3.23

Flowmaster Cat-Back, K&N CAI, Moroso plug wires, 160 thermo, LT4 KM, Hotchkis LCAs, Panhard Bar, SFCs, ES Tranny Mount, Cut out, 52MM TB, CarSound Cat, TB Bypass, BFG DRs
Coming soon: MAC Headers

Best time: 13.69 @ 100 (bad traction)

1969 Chevelle Malibu
Le Mans Blue
396 ci, Edelbrock Performer Intake, Comp Cams 270H, Edelbrock Q-jet,Hooker Comp. Headers, 12-bolt with 3.31s and a Powertrax, Cragar S/S

 

I have heard that the powertrax is kind of noisey and chatters when making turns.

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69 Camaro Z28 "clone" 327 AT
DAYTONA YELLOW WITH BLACK Z28 STRIPES
327 - "461" camel back heads. TRW,Edelbrock,Ultradyne,Hooker
TPI 700r4 automatic transmission

 

This isn't the typical powertrax noise, I know what you are talking about. This is all the time. Doesn't even happen in turns. Only a straight line. Goes away with power, happens when no power is applied.

 

I had the same thing after i put one in mine. Measure the circumference of both tires. They must be within 1/4" of each other. My first set of tires that i used ended up being different by 3/4 of an inch and it was always unlocked exept under power. I now make sure my tires are within 1/8" to prevent that from happening. If thats not it then call power trax and see what they say.

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95 Z-28 mystic teal
best et 11.72@118
with a little NOS
1981 Z-28
very mild 454
best et 11.69@115 NA
best MPH 118

 

i hear that there is supposed to be a 100 mile break-in period before it quiets down...have u went that far yet...also please tell me how u like it