How duarable are the 91 fbody stock rear ends
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Car: 91 gta ws6
Engine: L98
Transmission: 700 R4 TRANS
Axle/Gears: 3.23
How duarable are the 91 fbody stock rear ends
I have a 91 gta fire bird with a L98 I just upgraded a stage 2 transmission from good fellas transmission.this trans is good for 550hp 600 torque.What i want to know is can the stock rear end hang with the a motor that's as powerful as my transmission.
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Car: 91 gta ws6
Engine: L98
Transmission: 700 R4 TRANS
Axle/Gears: 3.23
Re: How duarable are the 91 fbody stock rear ends
ok what are some of the modification i can do to the rear wnd that will help with the stock rear end
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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: How duarable are the 91 fbody stock rear ends
Nothing....
No upgrades will make these rears live with that kinda power with traction. I broke 2 with less power and only running mid 11's. I then swapped in a moser ford 9" rear
Don't waste your money on the 7.5"/7.625" 10 bolt. The ring and pinion is just too small, axles are too small.
I wasted over $1,000 trying to make mine last and it didn't work, still broke anyway. The ford 9" only ran me about $2200 so I wasted/threw away over half of the price of the 9"
No upgrades will make these rears live with that kinda power with traction. I broke 2 with less power and only running mid 11's. I then swapped in a moser ford 9" rear
Don't waste your money on the 7.5"/7.625" 10 bolt. The ring and pinion is just too small, axles are too small.
I wasted over $1,000 trying to make mine last and it didn't work, still broke anyway. The ford 9" only ran me about $2200 so I wasted/threw away over half of the price of the 9"
#7
Re: How duarable are the 91 fbody stock rear ends
Yea, with that amount of power and good traction you are going to break it no matter what you do to it. Just get a stronger rear end like the 12 bolt or 9 inch and don't spend any money on the 7.5 10 bolt.
Now if the 550 to 600 HP is just a dream and you will only actually make about 300 HP then you can live with the 7.5 if you build it right.
Now if the 550 to 600 HP is just a dream and you will only actually make about 300 HP then you can live with the 7.5 if you build it right.
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Car: 91 gta ws6
Engine: L98
Transmission: 700 R4 TRANS
Axle/Gears: 3.23
Re: How duarable are the 91 fbody stock rear ends
Yea, with that amount of power and good traction you are going to break it no matter what you do to it. Just get a stronger rear end like the 12 bolt or 9 inch and don't spend any money on the 7.5 10 bolt.
Now if the 550 to 600 HP is just a dream and you will only actually make about 300 HP then you can live with the 7.5 if you build it right.
Now if the 550 to 600 HP is just a dream and you will only actually make about 300 HP then you can live with the 7.5 if you build it right.
I know that my transmission was my weak point now it looks like my rear end is also.
Last edited by kad5118; 02-17-2015 at 08:50 PM.
#10
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Re: How duarable are the 91 fbody stock rear ends
Driveline shock is what usually kills the 10bolts. Manual cars are far more prone to breaking them, especially when drag racing. I've got a cammed,headed,full bolt-on LT1 that should be in the 400-430whp area once tuned. Its in front of a T56 and a stock 3.23 10bolt. I'm fully expecting it to break at some point. At which point a 9" or 12bolt will go in its place.
But I'm not drag racing it, I'm road racing and street driving it. So I can be a little softer with the shifts. It still won't last forever though.
I've seen stock 10bolts live behind cammed LS1s making near 380-400whp. But those people have never launched hard on DR's or slicks. They are usually on street tires.
But I'm not drag racing it, I'm road racing and street driving it. So I can be a little softer with the shifts. It still won't last forever though.
I've seen stock 10bolts live behind cammed LS1s making near 380-400whp. But those people have never launched hard on DR's or slicks. They are usually on street tires.
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Car: 91 gta ws6
Engine: L98
Transmission: 700 R4 TRANS
Axle/Gears: 3.23
Re: How duarable are the 91 fbody stock rear ends
Driveline shock is what usually kills the 10bolts. Manual cars are far more prone to breaking them, especially when drag racing. I've got a cammed,headed,full bolt-on LT1 that should be in the 400-430whp area once tuned. Its in front of a T56 and a stock 3.23 10bolt. I'm fully expecting it to break at some point. At which point a 9" or 12bolt will go in its place.
But I'm not drag racing it, I'm road racing and street driving it. So I can be a little softer with the shifts. It still won't last forever though.
I've seen stock 10bolts live behind cammed LS1s making near 380-400whp. But those people have never launched hard on DR's or slicks. They are usually on street tires.
But I'm not drag racing it, I'm road racing and street driving it. So I can be a little softer with the shifts. It still won't last forever though.
I've seen stock 10bolts live behind cammed LS1s making near 380-400whp. But those people have never launched hard on DR's or slicks. They are usually on street tires.
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Car: 90 formula, 89 formula 350 vert
Engine: 305, 355
Transmission: T5, t56
Axle/Gears: 3:45 9 bolt, 8.8 3:73
Re: How duarable are the 91 fbody stock rear ends
The only thing "going" for the rear you have is it has 28 spline axle shafts over the earlier 26. If I were you I'd put a TA performance rear cover and c clip eliminator in and run the rear till it blows. It'll blow eventually but it may survive a few miles since your running street tires.
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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: How duarable are the 91 fbody stock rear ends
Soooo is the motor stock or what is done to that?
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