are all rear disk posi?
08-25-2016, 12:54 AM
#2
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Car: 1988 Camaro
Engine: 355, 10.34:1, 249/252 @.050", IK200
Transmission: TH-400, 3500 stall 9.5" converter
Axle/Gears: Ford 9", detroit locker, 3.89 gears
Re: are all rear disk posi?
No. Just cause you have one does not mean it has the other.
In some of the ones I'm parting out, I had a '84 TA with disk brakes, 3.73 gear, open (non posi)
I have a '92 z28 with drum brakes, 3.08 gear, posi.
In some of the ones I'm parting out, I had a '84 TA with disk brakes, 3.73 gear, open (non posi)
I have a '92 z28 with drum brakes, 3.08 gear, posi.
08-25-2016, 07:57 AM
#3
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Car: 89 Firebird
Engine: 355 TBI
Transmission: 700R4
Axle/Gears: 10 Bolt.Posi-3.73s
Re: are all rear disk posi?
Like Night rider327 said they are a mixed sort. My rear came out an 84 Z28 drum brake posi. Every Z28, Formula, or Trans Am I ever had was equipped with a posi even though I know they weren't all equipped with it.
Last edited by dmccain; 08-25-2016 at 08:01 AM.
08-29-2016, 09:35 PM
#4
Re: are all rear disk posi?
OK,let's fill u in on what I've learn about this disk brake unit. Its a 9 bolt Borg warner with a tag placed under one bolt head. Tag says gear ratio 3.27 and Vin decodes 5.7tpi. Its an 88 formula with no console seats or rug. There are raised numbers and letters on the bottom look like g11f7 . hard to tell. I couldn't see anything on front face passenger side axal.this Haynes manual shows all Borg are posi. Anything?
08-29-2016, 10:13 PM
#5
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Car: 1989 Pontiac Formula 350
Engine: L98
Transmission: 700R4
Axle/Gears: BorgWarner 3.27 Posi
Re: are all rear disk posi?
OK,let's fill u in on what I've learn about this disk brake unit. Its a 9 bolt Borg warner with a tag placed under one bolt head. Tag says gear ratio 3.27 and Vin decodes 5.7tpi. Its an 88 formula with no console seats or rug. There are raised numbers and letters on the bottom look like g11f7 . hard to tell. I couldn't see anything on front face passenger side axal.this Haynes manual shows all Borg are posi. Anything?
9 bolt Borg warner
3.27
posi
08-30-2016, 10:45 AM
#6
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Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: are all rear disk posi?
9-bolts are almost all posi and disc.
I'd say "all", but somebody posted a photo of one a few years back that had no posi and drum brakes. Creepy looking.
I'd say "all", but somebody posted a photo of one a few years back that had no posi and drum brakes. Creepy looking.
08-30-2016, 11:13 AM
#7
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Car: 1985 TA
Engine: 350 Carb
Transmission: T56
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08-30-2016, 12:27 PM
#10
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Re: are all rear disk posi?
I would recommend going with a 10 bolt from a 98 and up ls1 car, they will bolt in and have a Torsen LSD. Or go aftermarket. The posi in the BW 9 bolt is usually shot and they aren't much stronger anyway.
08-30-2016, 08:08 PM
#11
Re: are all rear disk posi?
That would take a few dollars to do. I will keep that in mind when I get that far,if this one has any issues. I'm not planning on running anything hard anyway. I just want thing to work right and not brake down every other day.
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