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OP
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Are there specific recommendations for the brand of Positraction Fluid that should be used in a 1966 Chevelle 12 Bolt Posi ?
dtm
the toolman
60th Anniversary Meet Chairperson
Dave
VCCA # L 28873
VCCA #83 Tool Technical Advisor for 1914-1966
VCCA #83 1940 Chevrolet Technical Advisor
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Joined: Nov 2003
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I use Kwell (about4or 6 oz) then top off with any posi gear oil. Mike
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Joined: Jan 2002
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ChatMaster - 25,000
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Gene Schneider
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I called 2 Chevy dealerships and here is what they said today.
#1 Dealer
Use GM #89021671 Lubricant - 80-90 weight - They had no idea if it was correct for positraction. Parts man said that nowhere on the bottle did it state that it was OK to use in posi-rear ends.
#2 Dealer said to use a Gear Lubricant - they didn't know a part number for this. They did say that I should also buy a GM Additive in addition to the Lubricant - GM #88900330
Neither parts guy had a clue what I should buy from them.
dtm
the toolman
60th Anniversary Meet Chairperson
Dave
VCCA # L 28873
VCCA #83 Tool Technical Advisor for 1914-1966
VCCA #83 1940 Chevrolet Technical Advisor
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Joined: Nov 2003
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ChatMaster - 2,000
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i mis-speeled the additive i've used in our corvettes for the last 3 years. its called Quell by piedmont chemical co in dayton ohio> its a derivative of oils from spermaceti whales. years ago i had a midyear vet with posi and bias belted tires. the clutch pack on the posi carrier would intermittently grab and when doing so, would toss the vette all over the road. i tried several different brands of limited slip axle additive concentrates and none worked as well as the Quell. if u have trouble locating quell, Kendall makes an additive but i've not used it. the Quell actually smells like dead fish. i love it and keep a couple 4 ounce bottles on the shelf. mike
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Joined: Jan 2002
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ChatMaster - 25,000
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ChatMaster - 25,000
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The original GM posi. addive and actual gear oil for pois contained whale sperm oil Many years ago it was discontinued due to some reason and GM came out with another additive. A later model Olds I had chattered on shrp turns when hot. The GM additive took care of the problem.
There are some synthetic gear oils today that don't require an additive. Any thing that says for limited slip will work fine.
Gene Schneider
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I have had bad luck with non GM additives.
John
1954 Belair Sport Coupe
1960 2 door Impala Hardtop 348/340HP 4spd
1962 2 door Impala Hardtop 409/409 4spd
1962 2 Door Biscayne Sedan 327/250 Auto
1977 Monza Mirage 305 4 Speed
1988 Celebrity Wagon
2018 GMC Sierra 2500 HD Diesel
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