Can you buy GM posi trac additive online?
Can you buy GM posi trac additive online? 
07-18-2007, 08:07 AM
#2
07-20-2007, 02:52 AM
#6
TECH Fanatic
2 bottles may be too much.
The idea is to modify the friction CE of the lubericant so that the clutches dont chatter. With too little... it will still chatter... with too much however, it will effectively change the bias and it will not operate correctly. In fact, it could be so much that it will feel and operate like that of an open differential.
I dont use more than 4oz in most applications... depending on the lubericant being used. On the EATON HD units that come in the aftermarket 12bolts... I have had to use a little more on some, but not too too many. Same for the 9".
But I have had to run 2 bottles in the majority of the DANA60's and larger. They have a considerable amount more surface area and its common for large DANA type differentials.
FWIW... The Ford Friction Modifier works the best IMO. Part# M-19546-A
The idea is to modify the friction CE of the lubericant so that the clutches dont chatter. With too little... it will still chatter... with too much however, it will effectively change the bias and it will not operate correctly. In fact, it could be so much that it will feel and operate like that of an open differential.
I dont use more than 4oz in most applications... depending on the lubericant being used. On the EATON HD units that come in the aftermarket 12bolts... I have had to use a little more on some, but not too too many. Same for the 9".
But I have had to run 2 bottles in the majority of the DANA60's and larger. They have a considerable amount more surface area and its common for large DANA type differentials.
FWIW... The Ford Friction Modifier works the best IMO. Part# M-19546-A
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07-20-2007, 11:54 PM
#10
Originally Posted by transamws6_97
I was told if you use a synthetic gear oil in your rear end that you dont need additive
07-21-2007, 02:34 PM
#11
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The GM part number is 1052358, shouldn't be more than $6-7 at the dealer.
For a clutch style I would use the Ford additive, for an Auburn I would use the GM.
For a clutch style I would use the Ford additive, for an Auburn I would use the GM.
07-21-2007, 02:36 PM
#12
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Originally Posted by koolaid_kid
Read the label on the bottle. If it is in there, it will say so. For example, my bottle of Royal Purple says "Contains Limited Slip Additive".
