Gear Oil..
Thread Starter
Instructor
Joined: May 2005
Posts: 124
Likes: 0
From: Baton Rouge LA
Gear Oil..
Which gear oil should I go with? I have the 3.42 differential assembly and just not sure...
70-75W90 Red Line 75W90 Synthetic Gear Oil, Quart $7.95 Buy Wish
70-SPG-H Red Line ShockProof Synthetic Gear Oil (Heavy), Quart $8.95 Buy Wish
70-SPG-L Red Line ShockProof Synthetic Gear Oil (Lightweight), Quart $8.95 Buy Wish
70-SPG-SL Red Line ShockProof Synthetic Gear Oil (Superlight), Quart
70-75W90 Red Line 75W90 Synthetic Gear Oil, Quart $7.95 Buy Wish
70-SPG-H Red Line ShockProof Synthetic Gear Oil (Heavy), Quart $8.95 Buy Wish
70-SPG-L Red Line ShockProof Synthetic Gear Oil (Lightweight), Quart $8.95 Buy Wish
70-SPG-SL Red Line ShockProof Synthetic Gear Oil (Superlight), Quart
Burning Brakes
Joined: Nov 2004
Posts: 836
Likes: 0
From: Lake Norman NC
Originally Posted by stromadd
75W90 Red Line 75W90 Synthetic Gear Oil, Quart $7.95
I believe I purchased some of the Redline Friction Modifier as well but I have heard that the 75W90 from Redline already has it in it! I'm sure someone will correct me if I am wrong! 
Safety Car
Joined: Sep 2001
Posts: 4,411
Likes: 1
From: Wilmington NC
Originally Posted by stromadd
What's the difference between their regular and the shockproof?
Shockproof oil has a lower coeficent of friction and is great for racing as you will have less losses. But I don't think it is good for limited slip applications and I know it will void a warranty.
Redline 75W90 Gear Oil is a very good product I have been using for years. It has 4% friction modifier built in which seems to be just right for the C5.
Team Owner
Joined: May 2001
Posts: 36,836
Likes: 244
From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
Originally Posted by stromadd
Which gear oil should I go with? I have the 3.42 differential assembly and just not sure...
70-75W90 Red Line 75W90 Synthetic Gear Oil, Quart $7.95 Buy Wish
70-SPG-H Red Line ShockProof Synthetic Gear Oil (Heavy), Quart $8.95 Buy Wish
70-SPG-L Red Line ShockProof Synthetic Gear Oil (Lightweight), Quart $8.95 Buy Wish
70-SPG-SL Red Line ShockProof Synthetic Gear Oil (Superlight), Quart
70-75W90 Red Line 75W90 Synthetic Gear Oil, Quart $7.95 Buy Wish
70-SPG-H Red Line ShockProof Synthetic Gear Oil (Heavy), Quart $8.95 Buy Wish
70-SPG-L Red Line ShockProof Synthetic Gear Oil (Lightweight), Quart $8.95 Buy Wish
70-SPG-SL Red Line ShockProof Synthetic Gear Oil (Superlight), Quart
Team Owner
Joined: May 2001
Posts: 36,836
Likes: 244
From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
Originally Posted by C5Jim
I've used RedLine for years. One of the first things I did was to put Redline MTL in the MN6 and 75W90 in the rear end.
It's great stuff.
It's great stuff.
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Racer
Joined: Jan 2005
Posts: 457
Likes: 0
From: Mechanicsburg Pa
Originally Posted by LoneStarFRC
How come the MTL and not the D4 ATF?
I tried the D4 and saw no difference in shift quality. I called Redline and they said I could use the MTL, but may have stiff shifting in exteme cold. I had it out this winter with the temp at 6 degrees and it was a little stiff, but no much and not for long.
The main reason for MTL is because it does a great job of protecting the tranny.
I just had a rebuild done on a BW T5 with 320,000 on it (300,000 on MTL) The rebuider could not believe how good all the gears, syncros and bearings looked, considering the mileage.
BTW , he too sugested D4, but said stick with what works.
Drifting
Joined: Dec 1999
Posts: 1,315
Likes: 27
From: Central Florida
Originally Posted by MHVette
I have been running Redline 75W90 since January and have had no problems... I believe I purchased some of the Redline Friction Modifier as well but I have heard that the 75W90 from Redline already has it in it! I'm sure someone will correct me if I am wrong!
I believe I purchased some of the Redline Friction Modifier as well but I have heard that the 75W90 from Redline already has it in it! I'm sure someone will correct me if I am wrong! no friction modifier and the 75W90 contains 4-5%. (I think
GM spec is 5%) On my autocross car I mix to get 2%.
No problems with "chatter"
Russ
Safety Car
Joined: May 2003
Posts: 3,814
Likes: 105
From: Dearborn Heights Michigan
Originally Posted by C5Jim
I've used RedLine for years. One of the first things I did was to put Redline MTL in the MN6 and 75W90 in the rear end.
It's great stuff.
It's great stuff.
Fred
Team Owner
Joined: May 2001
Posts: 36,836
Likes: 244
From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
Originally Posted by C5Jim
It just shifts better with the MTL.
I tried the D4 and saw no difference in shift quality. I called Redline and they said I could use the MTL, but may have stiff shifting in exteme cold. I had it out this winter with the temp at 6 degrees and it was a little stiff, but no much and not for long.
The main reason for MTL is because it does a great job of protecting the tranny.
I just had a rebuild done on a BW T5 with 320,000 on it (300,000 on MTL) The rebuider could not believe how good all the gears, syncros and bearings looked, considering the mileage.
BTW , he too sugested D4, but said stick with what works.
I tried the D4 and saw no difference in shift quality. I called Redline and they said I could use the MTL, but may have stiff shifting in exteme cold. I had it out this winter with the temp at 6 degrees and it was a little stiff, but no much and not for long.
The main reason for MTL is because it does a great job of protecting the tranny.
I just had a rebuild done on a BW T5 with 320,000 on it (300,000 on MTL) The rebuider could not believe how good all the gears, syncros and bearings looked, considering the mileage.
BTW , he too sugested D4, but said stick with what works.
Premium Supporting Vendor
Joined: Aug 2001
Posts: 5,364
Likes: 38
From: King George VA
AMSOIL reformulated their gear lube line last fall. I use their best gear lube in my car which sees pretty extreme use and I've never had a failure. In fact, earlier this season, I lost a diff axle seal early in the race, but ran until the finish (26 laps). At the end of the race my diff was a quart low but still working fine (I won).
AMSOIL Severe Gear Extreme Pressure Synthetic 75w90
AMSOIL sales via my (and MrPickles) dealerships benefit the forum. Thanks for your support.
AMSOIL Ordering Information
AMSOIL Preferred Customer Program
AMSOIL Severe Gear Extreme Pressure Synthetic 75w90
AMSOIL sales via my (and MrPickles) dealerships benefit the forum. Thanks for your support.
AMSOIL Ordering Information
AMSOIL Preferred Customer Program
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AMSOIL Dealer (Forum Vendor)
AMSOIL Preferred Customer Program (Members buy at Wholesale - a savings of about 25%)
C66 Racing #66 NASA ST2, SCCA T2
AMSOIL Dealer (Forum Vendor)
AMSOIL Preferred Customer Program (Members buy at Wholesale - a savings of about 25%)
