9 bolt gear oil.....
#1
Member
Thread Starter
9 bolt gear oil.....
Hey guys. After spending an hour on here looking through all the "what gear oil to put in my 9 bolt" threads, I decided to get some 80w90 oil without limited slip additive for my car. Went to the parts store...... Every bottle of gear oil has " with limited slip additive" or "friction additive included" on the bottle. Every brand had the same thing on the label... The only brand that didn't have that on the label wa Lucas... But it said "works with limited slip" on the back of the bottle... So, what brand are you guys using for your 9 bolt and DONT use the limited slip additive?? It seems like all the gear oils today automatically come with the additive already in the oil...
#3
Member
Thread Starter
Re: 9 bolt gear oil.....
I actually have 2 brand new bottles of Red Line 75w140 that someone gave me. Unfortunately, it does have the limited slip additive... Can I still use it?
#5
Member
Thread Starter
Re: 9 bolt gear oil.....
Apparently GM came out with a bullitin in the 90s stating not to use the additive in the 9 bolt rears. The bearings in the 9 bolts are different and they don't need the additive. There are numerous threads on here about the subject
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Strigon1 (10-21-2023)
#6
Re: 9 bolt gear oil.....
The additive is not for the bearings. The additive helps the cones in the differential slip smoother so that the rear end doesn't pop and jerk when turning corners.
The bearings in the Borg Warner rear end are just standard tapered roller bearings. There is nothing special about them. They are the same bearings that are used in just about every other rear end in the world. The Borg Warner rear end had Koyo bearings instead of Torrington bearings, but that's just the brand. There is nothing different about them.
The bearings in the Borg Warner rear end are just standard tapered roller bearings. There is nothing special about them. They are the same bearings that are used in just about every other rear end in the world. The Borg Warner rear end had Koyo bearings instead of Torrington bearings, but that's just the brand. There is nothing different about them.
#7
Re: 9 bolt gear oil.....
i am going to change the fluid in my 9 bolt also .. when you do a search it seems like everyone one has a different answer .. any proven gear oil that will work with the 9 bolts and not cause any problems ? additive or no additive ?
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#8
Re: 9 bolt gear oil.....
The '04 to '06 GTO used the same type of Borg Warner differential that was used in the 3rd gen 9 bolt. The only oil that has consistently worked in that rear end is the Torco oil. I experienced this myself when I rebuilt the rear end in a GTO. I used Amsoil in it and it worked fine for a few months, and then it started making a lot of noise when turning corners. The Amsoil was drained and Torco was added and the problem went away. I never had any problems with Amsoil in any rear end except the ones that used cones instead of clutch plates.
#9
Re: 9 bolt gear oil.....
The '04 to '06 GTO used the same type of Borg Warner differential that was used in the 3rd gen 9 bolt. The only oil that has consistently worked in that rear end is the Torco oil. I experienced this myself when I rebuilt the rear end in a GTO. I used Amsoil in it and it worked fine for a few months, and then it started making a lot of noise when turning corners. The Amsoil was drained and Torco was added and the problem went away. I never had any problems with Amsoil in any rear end except the ones that used cones instead of clutch plates.
#10
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Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: 9 bolt gear oil.....
I use regular diff oil and the ford or GM additive (both the same quality and last longer than any other stuff I've tried).
Last edited by TTOP350; 08-13-2015 at 01:49 PM.
#14
Re: 9 bolt gear oil.....
#17
On Probation
Re: 9 bolt gear oil.....
My 84s owners manual calls for 23 ozs. of GM PN# 1052271
GM gear lubricant
No mention of either the Aussie 9 bolt or US GM unit difference
nor to add any GM specific limited slip additive.
(Unlike my old Pontiac 12 bolt which has a metal tag on the pumpkin
cover stating the GM limited slip additive is required.)
From Drain 98s sticky "EverYTHING i KNOW ABOUT 9 Bolts article" sticky
He calls for -Torco 85w140 RGO Mineral Based Gear Oil (2 required), 1 Bottle of Torco F Type Friction Modifier (Recommended for Cone Type LSD Units).
GM gear lubricant
No mention of either the Aussie 9 bolt or US GM unit difference
nor to add any GM specific limited slip additive.
(Unlike my old Pontiac 12 bolt which has a metal tag on the pumpkin
cover stating the GM limited slip additive is required.)
From Drain 98s sticky "EverYTHING i KNOW ABOUT 9 Bolts article" sticky
He calls for -Torco 85w140 RGO Mineral Based Gear Oil (2 required), 1 Bottle of Torco F Type Friction Modifier (Recommended for Cone Type LSD Units).
Last edited by sonjaab; 08-13-2015 at 09:37 PM.
#19
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Re: 9 bolt gear oil.....
My 84s owners manual calls for 23 ozs. of GM PN# 1052271
GM gear lubricant
No mention of either the Aussie 9 bolt or US GM unit difference
nor to add any GM specific limited slip additive.
(Unlike my old Pontiac 12 bolt which has a metal tag on the pumpkin
cover stating the GM limited slip additive is required.)
From Drain 98s sticky "EverYTHING i KNOW ABOUT 9 Bolts article" sticky
He calls for -Torco 85w140 RGO Mineral Based Gear Oil (2 required), 1 Bottle of Torco F Type Friction Modifier (Recommended for Cone Type LSD Units).
GM gear lubricant
No mention of either the Aussie 9 bolt or US GM unit difference
nor to add any GM specific limited slip additive.
(Unlike my old Pontiac 12 bolt which has a metal tag on the pumpkin
cover stating the GM limited slip additive is required.)
From Drain 98s sticky "EverYTHING i KNOW ABOUT 9 Bolts article" sticky
He calls for -Torco 85w140 RGO Mineral Based Gear Oil (2 required), 1 Bottle of Torco F Type Friction Modifier (Recommended for Cone Type LSD Units).
My 9-bolt has the tag as well, which is why I say use the additive.
#20
Re: 9 bolt gear oil.....
is this the additive i need ?
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