Trans broke at Noble Ok shootout

[buickboy]

Broke my trans at the Noble Ok shootout running a TB. I believe the input shaft sheared. Funny feeling sitting on the line with the lights coming down and you just shifted it to drive and car just sits there. Does shearing the input put any trash in the rest of trans. Do i need hardened parts or Billet when running high 10's with a 200. Experiences with hardened parts would be good.
Mitch

 

[HOTTOGO]

If the input or fwd. shaft just made a clean break you may be OK with everthing else. Hardened is good billet is better. Stock fwd. shaft good to about 12 sec. stock input good to about 11 sec. after that you should think about billet.

 

[AxL87GN]

I may be wrong.(really it does happen),but you may have broken your turbineshaft(input)splines in your converter or your stator sheared off. Only way to find out pull the pan. Good luck.
Allan

 

[AxL87GN]

I forgot to add this earlier. if you race it you will break it. If you strenghthen one part you will break something else, usually something that never ever ever has broken before. You'll get the you broke what?? look.

 

[WE4]

Go ask...

Turbo Dave on this board. he will tell you a story or two. Go ahead, ask him.


Bruce
WE4

 

[TurboDave]

Ya, too many breaks to count. At least one a year for 3 - 4 years. And it was ALWAYS the same part (and the most likely candidate that you broke buickboy). (Bruce, correct me if I'm using the wrong naming convention here) but I believe it's called the intermediate drum/shaft. It's the weakest link in the entire system. Odly enough it never seemed to break under racing conditions, but after I got back home and did a "tuning blast" on a local street

I never considered using hardened parts, simply because IMHO hardening would do nothing for the usual breaking parts other than to make them just more brittle. Again, just my opinion.

Then a couple years ago, Bruce introduced the Billet parts that he makes. I got the new intermediate shaft/drum, and some other parts that escape me now (sorry Bruce). But anyway, Bruce challenged me to break "these" parts. And two years later, and a LOT of abuse (including a few months on a tranny brake), and the tranny is still going strong

Haven't had a lick of trouble. Those parts are just plain unbreakable.

Now, if you're running into the 10's a billet input shaft may also be in order, but it's the intermediate shaft/drum that are the culprits (usually).