Mobil 1 Gear Lube Users
#2
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Car: 4
Engine: 6
Transmission: 5
Yes that would be the stuff.
The rear holds around 2 quarts, depending on which cover you have, which carrier, etc.
If you have a clutch type posi such as Eaton or Auburn, add a bottle of the GM additive first, then fill it the rest of the way with the M1.
The rear holds around 2 quarts, depending on which cover you have, which carrier, etc.
If you have a clutch type posi such as Eaton or Auburn, add a bottle of the GM additive first, then fill it the rest of the way with the M1.
#3
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Car: '87 Cam RS V6
Engine: Top Secret
Transmission: DYT700R4 custom inerts and conv.
Word of advice:
Read your diriection for the cone clutch type posi's- You are not to use synthetic type gear oil with them.
Read your diriection for the cone clutch type posi's- You are not to use synthetic type gear oil with them.
#4
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Car: '87 Formula
Engine: 350
Transmission: Auto
I had Autozone look up the capacity for mine, it took 1 3/4 quarts. I'm sure you could have them look it up if you stopped in.
vsixtoy,
I dont know much about posi units, can you tell me what a cone clutch type is? I've got a newer ('97) rearend, 3.23 ratio with posi. I just added Mobil 1 Synthetic, and I hope this was ok...
If not, !
vsixtoy,
I dont know much about posi units, can you tell me what a cone clutch type is? I've got a newer ('97) rearend, 3.23 ratio with posi. I just added Mobil 1 Synthetic, and I hope this was ok...
If not, !
#5
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Car: '87 Cam RS V6
Engine: Top Secret
Transmission: DYT700R4 custom inerts and conv.
I believe a '97 rear posi unit is a Zexel?
Don't think they are a problem- I never owned one though. Deffinately don't use synthetic on an Eaton or an Auburn.
Don't think they are a problem- I never owned one though. Deffinately don't use synthetic on an Eaton or an Auburn.
#6
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Caution:
I used Mobil 1 gear lube on my high mileage Auburn Posi , I added the slip additive. The rear was making loud noises and clicks right after the lube change, I thought that the posi broke. I replaced the Mobile 1 with regular gear oil and additive, the noise dissapeared in 10 minutes. The Mobile 1 was not thick enough, I wasted $35 (gaskets, oil, etc) for nothing. Just my experience
Enjoy
I used Mobil 1 gear lube on my high mileage Auburn Posi , I added the slip additive. The rear was making loud noises and clicks right after the lube change, I thought that the posi broke. I replaced the Mobile 1 with regular gear oil and additive, the noise dissapeared in 10 minutes. The Mobile 1 was not thick enough, I wasted $35 (gaskets, oil, etc) for nothing. Just my experience
Enjoy
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#8
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Car: 87 IROC-Z28
Engine: 305 TPI-New 355 on the engine stand
Transmission: T56
Axle/Gears: 3.73 Eaton posi-Soon a 9" Ford!
For all the information you would ever want to know about oils, gear lubes, filters, even oil for your lawn mower go here. Some of the info there is truly eye opening.
I'll never think of oil as just plain old oil again after visiting this site and reading up on oils and filters.
http://theoildrop.server101.com/ubb/ultimatebb.php
I'll never think of oil as just plain old oil again after visiting this site and reading up on oils and filters.
http://theoildrop.server101.com/ubb/ultimatebb.php
#9
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Car: 86\92 Mutant
Engine: 355CI 430HP
Transmission: T-5 with mods
Axle/Gears: 7.625", Eaton Posi, 3.73
Originally posted by vsixtoy
I believe a '97 rear posi unit is a Zexel?
Don't think they are a problem- I never owned one though. Deffinately don't use synthetic on an Eaton or an Auburn.
I believe a '97 rear posi unit is a Zexel?
Don't think they are a problem- I never owned one though. Deffinately don't use synthetic on an Eaton or an Auburn.
Particularily if you Autocross or Road Race, Synthetic is a necessity.
All of the top Autocrossers out here run synthetic in their Auburns as well. With a 10 bolt Auburn the only problem with a synthetic is that it is too slippery and you lose some posi affect. That can be cured with different Posi load springs. With 9 bolts it's a no-brainer. We just shim the livin' beejeezus out of the things ( 150lbs to 300lbs break away torque ).
Autocrossing is a hell of a lot harder on Auburns than Drag Racing. If you Drag race, I'd just throw in the Synthetic oil ( 75\90w or 80\140w ) and not worry about things.
Torsens must absolutely run Synthetic. No if's, and's or but's.
#10
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Car: 1982 Z28
Engine: LS1
Transmission: T56
Originally posted by Chickenman35
Torsens must absolutely run Synthetic. No if's, and's or but's.
Torsens must absolutely run Synthetic. No if's, and's or but's.
Next to zero metal on the magnets when I changed it after a hard season on the road courses, and very quiet even with noise-prone Richmond gears.
#11
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Car: 1990 Camaro RS
Engine: Juiced 5.0 TBI - 300rwhp
Transmission: T5
Axle/Gears: 3.42 Eaton Posi, 10 Bolt
Originally posted by Chickenman35
Synthetic's fine for an Eaton. Have been running it for years.
Synthetic's fine for an Eaton. Have been running it for years.
#12
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Car: '00 Chevrolet Corvette
Engine: LS1
Transmission: 4L60E
Axle/Gears: 2.73
In the owner's manual for my 2002 WS6 it calls for synthetic rear end lube. My Auburn unit that I put in my '88 said not to use synthetic.
#13
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Car: '87 Cam RS V6
Engine: Top Secret
Transmission: DYT700R4 custom inerts and conv.
Originally posted by Mark305TBI
In the owner's manual for my 2002 WS6 it calls for synthetic rear end lube. My Auburn unit that I put in my '88 said not to use synthetic.
In the owner's manual for my 2002 WS6 it calls for synthetic rear end lube. My Auburn unit that I put in my '88 said not to use synthetic.
So a note to all that use it- synthetic may work for you but the manufacturer specifically says "don't use it". Thats all I'm saying. I don't think there is more than a small handful here that can properly set their own diff pressures to compensate for slippage of the clutches with synthetics as not to burn them up.
#14
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Car: 4
Engine: 6
Transmission: 5
I have Mobil 1 with GM additive in 2 posi rears I own, and have for many years now; one is a stock Auburn, the other is an Eaton heavy-duty. No problems here.
#15
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Car: 94 Corvette
Engine: LT-1
Transmission: Freakin Automatic---For Now
Here is the catch on the "don't use synthetic" issue. I went to the dealer to get the correct lube for my 9-bolt. I took the manual in, and got the # it called for. Low and behold that stuff has been discontinued, and replaced with... synthetic. It is like gear lube + friction modifier all in one. I asked if he was sure that is what I needed, just to be sure, so he showed me the info on the computer. Sure as hell, it is synthetic, and sure as hell it replaced the lube for the 9-bolt. I think that I'll trust GM on what to run in my diff. The funniest thing about it is, it was about the same price as Royal Purple Mobil 1 etc.
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