9in Center Member limited slip
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From: 212 is up in this Bit@#
Car: Resto-Mod 1987 IROC-Z Clone
Engine: Alky fed L92 Vortec Twin-Turbo 6.8L
Transmission: My own built/ design 4L80M
Axle/Gears: Custom 12 bolt (4.10:1)
Re: 9in Center Member limited slip
I have not seen one in a long time...
But that looks to be an Air Locker/ Pneumatic Locking Ford 9" Diff.
Not a Limited Slip Diff.
But that looks to be an Air Locker/ Pneumatic Locking Ford 9" Diff.
Not a Limited Slip Diff.
Joined: Oct 2001
Posts: 12,228
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From: Il
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: 9in Center Member limited slip
Looks like it has a internal oil pump for a external oil cooler. Used to use those on the panoz road race car. Nascar used them too.
Ford 9 Inch Internal Oil Pump Option | GearFX (gearfxdriveline.com)
Ford 9 Inch Internal Oil Pump Option | GearFX (gearfxdriveline.com)
Supreme Member
Joined: Jul 2006
Posts: 2,917
Likes: 803
From: 212 is up in this Bit@#
Car: Resto-Mod 1987 IROC-Z Clone
Engine: Alky fed L92 Vortec Twin-Turbo 6.8L
Transmission: My own built/ design 4L80M
Axle/Gears: Custom 12 bolt (4.10:1)
Re: 9in Center Member limited slip
Looks like it has a internal oil pump for a external oil cooler. Used to use those on the panoz road race car. Nascar used them too.
Ford 9 Inch Internal Oil Pump Option | GearFX (gearfxdriveline.com)
Ford 9 Inch Internal Oil Pump Option | GearFX (gearfxdriveline.com)
You are exactly correct!!!
I could not get my thumb on it...
It looked familiar, and the Air-Locker popped in my head...
But I was wrong.
Lol, Ford 9" Differentials are not permitted in my Shop (Only GM and Dana Units)...
so it has been a long time since I have seen one.
You have it 100% Correct!
Thank you!
Thread Starter
Junior Member
Joined: Sep 2012
Posts: 42
Likes: 3
Re: 9in Center Member limited slip
Looks like it has a internal oil pump for a external oil cooler. Used to use those on the panoz road race car. Nascar used them too.
Ford 9 Inch Internal Oil Pump Option | GearFX (gearfxdriveline.com)
Ford 9 Inch Internal Oil Pump Option | GearFX (gearfxdriveline.com)
The guy I got it from said it’s a nascar unit. I had to make that hardline to connect the pump to the case so that I can use it with a cooler down the road.
should I put modifiers with the non synthetic fluid? Thanks.
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From: Armstrong B.C.
Car: 1991 camaro Z28
Engine: Forged 370" LS turbo s488
Transmission: Built 4L80e FTI converter
Axle/Gears: MWC 9" 35 spline 3.25 gears
Joined: Aug 2006
Posts: 12,812
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From: Central NJ
Car: 86 Trans Am
Engine: 408 stroker sbc
Transmission: TKO600
Axle/Gears: Moser full floater m9, 3:70 trutrac
Re: 9in Center Member limited slip
It's probably a Detroit locker as is apparently a stock car takeoff. It's probably also a stupid low gear, so it may not be very useful to you.
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Joined: Oct 2001
Posts: 12,228
Likes: 1,156
From: Il
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: 9in Center Member limited slip
Supreme Member
Joined: Jul 2006
Posts: 2,917
Likes: 803
From: 212 is up in this Bit@#
Car: Resto-Mod 1987 IROC-Z Clone
Engine: Alky fed L92 Vortec Twin-Turbo 6.8L
Transmission: My own built/ design 4L80M
Axle/Gears: Custom 12 bolt (4.10:1)
Re: 9in Center Member limited slip
Sorry that was a Joke that no one got...
Generally If I go to a Ford style Diff, it is one of the over-sized versions (not an actual Ford 9").
I have posted this Image many times here:
Aftermarket Pinions from over-sized Ford 9" Style Gear Sets: Left = 9.5" Ring-Gear, then 10", and then 11".
I run the 11" version in my Funny-Car.
I am the Guy that your Wife says not to worry about!
Generally If I go to a Ford style Diff, it is one of the over-sized versions (not an actual Ford 9").
I have posted this Image many times here:
Aftermarket Pinions from over-sized Ford 9" Style Gear Sets: Left = 9.5" Ring-Gear, then 10", and then 11".
I run the 11" version in my Funny-Car.
I am the Guy that your Wife says not to worry about!
Last edited by vorteciroc; Dec 10, 2021 at 06:57 PM.
Supreme Member
Joined: Apr 2010
Posts: 1,200
Likes: 126
From: Armstrong B.C.
Car: 1991 camaro Z28
Engine: Forged 370" LS turbo s488
Transmission: Built 4L80e FTI converter
Axle/Gears: MWC 9" 35 spline 3.25 gears
Re: 9in Center Member limited slip
Sorry that was a Joke that no one got...
Generally If I go to a Ford style Diff, it is one of the over-sized versions (not an actual Ford 9").
I have posted this Image many times here:
Aftermarket Pinions from over-sized Ford 9" Style Gear Sets: Left = 9.5" Ring-Gear, then 10", and then 11".
I run the 11" version in my Funny-Car.
I am the Guy that your Wife says not to worry about!
Generally If I go to a Ford style Diff, it is one of the over-sized versions (not an actual Ford 9").
I have posted this Image many times here:
Aftermarket Pinions from over-sized Ford 9" Style Gear Sets: Left = 9.5" Ring-Gear, then 10", and then 11".
I run the 11" version in my Funny-Car.
I am the Guy that your Wife says not to worry about!
Thread Starter
Junior Member
Joined: Sep 2012
Posts: 42
Likes: 3
Re: 9in Center Member limited slip
Thread Starter
Junior Member
Joined: Sep 2012
Posts: 42
Likes: 3
Re: 9in Center Member limited slip
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Joined: Oct 2021
Posts: 737
Likes: 116
From: Windsor, On
Car: 1984 Trans AM
Engine: 305
Transmission: 700-4r
Axle/Gears: 3.23
Re: 9in Center Member limited slip
Yes. I use posi lube & non-synthetic oil in my 1972 Buick gs which had an Eaton positraction unit. that I sold 2 months ago. Never use synthetic!
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