T5 guys

[mach1]

What is the weak link in the T5's? Does anyone successfully have several years of CMC racing on a stock t5 box?

[ShadowBolt]

What is the weak link in the T5's? Does anyone successfully have several years of CMC racing on a stock t5 box?

I think the GM unit is stronger for some reason.

JJ

[Fbody383]

The GM "world class" box is the one that seems to live. I think those guys also use an aftermarket part/rear retainer to support the countershaft and keep it from walking. Correct me and Sean may chime in.

May be redundant for you:
http://www.moderndriveline.com/Technical_Bits/t5_history.htm

http://www.tremec.com/anexos/TRSM-T5-0510-R1_173.pdf

http://www.thirdgen.org/forums/transmissions-drivetrain/444098-t5-faq-everything-we.html

[mach1]

Everything I have found is that 3rd gear is the culprit.

[Wade]

In five years of racing, I managed to tear up one fourth gear/input shaft, and two third gears. The first was a result of curb hops and offs as I was learning. The last was a result of my failure to notice a failing clutch cable and improper engage/disengagement.

My opinion is that a NEW T5 will last if properly shifted and not abused. A rebuilt 200,000 mile transmission just isn't going to make it more than a couple seasons. The cases flex and are just tired. I always liked the rules...you chose cheap, light, and moderate reliable (T5) or you chose more $, more weight, and more reliability (TKO). It leaves room to grow into a better trans as you add lightness in other areas.