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Stock trans strength ?

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Old 05-24-2011 | 08:16 PM
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Default Stock trans strength ?

I was wondering if anyone new how much work can be done to a 99 pontiac trans am or how much horsepower/tourque i can be pushing with a stock transmission.
Old 05-25-2011 | 10:46 PM
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Has worked for me at 600+ Hp/TQ.
Old 05-26-2011 | 11:05 AM
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My stock tranny has sustained over 500whp since 2007, current numbers in sig, and it just let go in april.
Old 05-26-2011 | 12:03 PM
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Originally Posted by bravolistick
My stock tranny has sustained over 500whp since 2007, current numbers in sig, and it just let go in april.
let go at what though? 880 ft lbs of torque? LOL DAMN
Old 05-26-2011 | 12:07 PM
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Too MANY varibles to calculate as factors such as weight, gearing, clutch, horsepower combo will weigh in.

Also the biggest factor is the driver, they can make a very tough/built trans blow up under stock power and a another who is careful make one last well into the 600 HP range.

I will let the Sponsors weigh in on this as they see more examples then I have in my years with the T-56.
Old 05-26-2011 | 02:57 PM
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Originally Posted by got-a-ls1
let go at what though? 880 ft lbs of torque? LOL DAMN
It let go at my current power listed in my sig.

I was cruising at 100mph in 6th, downshifted to 5th and rolled into the boost. (20lbs) Ran it to about 150+ and then put her in neutral. Coasted to a stop, without a hitch. When I went to put it back in gear she was toast. Sounded like a barrel full of wrenches. lmao Prior to that, there was not a single indication that anything had gone wrong. No weird vibrations, smoke, noises, nothing.

I chose 5th because I didn’t want to spin. All my down shifts before this are usually to lower gears, but result in serious traction loss which is scary @ 100+

The fact that I was actually hooking instead of spinning is what I believe destroyed my tranny. Otherwise, I think my tranny would have died much sooner. I've been told that with turbo’s the load is far greater in the higher gears.

As far as other variables, I have pix of my used flywheels and clutch disc’s to illustrate their even wear, and lack of any abuse or “hot spotting”. The car is a bit heavier than stock, stock gearing, with a OEM weight flywheel and a hendrix 6 puck. The rest of my drive line is built, (save for the diff for now ). The tranny was the weak link, and far over due to fail. I was on borrowed time.
Old 05-28-2011 | 02:30 AM
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Mine has held up quite well, getting the **** beat out of it on nitrous at around 600rwhp/tq
Old 05-28-2011 | 02:49 AM
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Originally Posted by bravolistick
It let go at my current power listed in my sig.

I was cruising at 100mph in 6th, downshifted to 5th and rolled into the boost. (20lbs) Ran it to about 150+ and then put her in neutral. Coasted to a stop, without a hitch. When I went to put it back in gear she was toast. Sounded like a barrel full of wrenches. lmao Prior to that, there was not a single indication that anything had gone wrong. No weird vibrations, smoke, noises, nothing.

I chose 5th because I didn’t want to spin. All my down shifts before this are usually to lower gears, but result in serious traction loss which is scary @ 100+

The fact that I was actually hooking instead of spinning is what I believe destroyed my tranny. Otherwise, I think my tranny would have died much sooner. I've been told that with turbo’s the load is far greater in the higher gears.

As far as other variables, I have pix of my used flywheels and clutch disc’s to illustrate their even wear, and lack of any abuse or “hot spotting”. The car is a bit heavier than stock, stock gearing, with a OEM weight flywheel and a hendrix 6 puck. The rest of my drive line is built, (save for the diff for now ). The tranny was the weak link, and far over due to fail. I was on borrowed time.
its impressive it lasted as long as it did... thats asking a lot for a stock transmission, especially 5th gear blast
Old 05-31-2011 | 09:30 AM
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indeed
Old 05-31-2011 | 07:24 PM
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Man so theirs no real answer but thanks i have a rough range where is should stop with my mods.




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