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OK! Who Farted Again??
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17,884 Posts
Any posi fluid is ok but add the GM additive! I used 1 1/2 bottles to be sure! Without it I got chatter on tight turns.
 

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Premium Member
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43,745 Posts
sometimes using more than the prescribed amount of additive will cause slipping and faster wear of the clutches...



 

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Risky Business
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6,413 Posts
It seems that every rear is different. Mine takes 2 bottles of GM addative. I always try one first, with regular dino gear lube. Its fine for a while, then starts to chatter, so I add another bottle of posi addative.
 

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344 Posts
Two bottles of additive and your posi trac is hooking with both tires?
 

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OK! Who Farted Again??
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17,884 Posts
With only 1 bottle I get chatter. 1 1/2 & perfect.
Guess something must make each rear like its own mix! Miles, wear & tear, general condition??
 
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