just wondering.....

i am getting a ls7 clutch but the trans will remain stock for aslong as i can.

its a 04 GTO with a cam and bolt ons made 395rwhp, but i will be adding a procharger (goes in the first week of march)... so it will be around 525-550rwhp. i plan on putting a drag radial on it in april. Will be dragracing at the strip 3-4 times this summer along with some street racing...... not really for money but u get the point.

when will the T56 fail?

yes i know this is a real general question with lots of variables but answer the best you can.

 

The T56 is a pretty strong tranny. I broke my main shaft around 900 rwhp and 800 rwtq. I am pretty sure the T56 can handle close to 700 rwtq in stock form, so you should be fine at your goals.

 

call sixspeedsinc, there a sponsor here. They know more about the T56 than you know about the back of your hand. I believe some of the stock parts only reliably hold around 450HP. Some people just get lucky with them. Mine broke ( some washer on the counter shaft melted, gears worn to **** ) and all I have is a lid and TB.

Note: I think alot of it also has to do with how well you drive a stick.

Edit: Also to speedracer5534: I had my broken tranny completely rebuilt using sixspeedincs stage 4 package, which they say only holds 700rwhp. How does a stock T56 hold the same amount of power as a heavily modified/built tranny??

 

I don't consider breaking a shift pad, slider key, or sychro problem breaking your T56 because of too much power. Any of those issues can be done with a totally stock car. If you break a main shaft or break a gear then most likely you over powered it. I know of many T56s in the 600 rwtq range with no issues.

 

thats impressive

 

Ive broke 2 axles , 4 ring gears , 3 pos units , 3 clutch disks, 2 drive aluminum shafts, But all is upgraded now ,But still have the stock M6 and running strong with my mods in my sig.

 

Six Speeds Inc told me that the stock tranny will support 700rwhp without a problem. Mine went down last march because of a bad 3-4 shift fork, do to previous owner, as many do on here. I had them rebuild it with the 1a package which is basically stock just better insides. You shouldn't have to worry about a thing.