Engine/Transmission (1998.5 - 2002) Anyone ever broke cryo'd shafts

[LoneRam]

Just curious if anyone has heard of someone breaking their cryo'd shafts. Also, how did it happen and what kind of hp were they making. Thanks.



LoneRam

 

[Strick-9]

I had my current transmission completely cryo'd front to back.



I went back to the cryo shop for some more work and discussed our application to him in detail. I was surprised at his honesty, but thankful at the same time.



I was told that the cryo'ing process wouldn't prevent me from breaking output shafts during a stall test. He actually went on to say he didn't even think it would hold to more torque before letting go. He said the cryo'ing process is amazing for how it makes the wear resistance go up on parts. But the only way a shaft or torsionally loaded member would be stronger, is if there was some residual stress from building the piece. He told me the cryo'ing process relieves residual stresses, but the additional strength for input and output shafts would not be worth mentioning.



Not if, but when I break this input shaft or hub, it'll be my third. Then I plan on installing the billet stuff that DTT sells.



-Chris

 

[rrausch]

When I got my ATS in Denver, Don Ramer was luke-warm on the merits of the cyroed front clutch and input shaft. He told me their tests seemed to show the problem with breaking the input shaft was a jolting torque spike, more so than high H. P. & high torque, and he said they compensated for that in their design by making the TripleLok TC Clutches engage in "spurts" so as to avoid a torque spike. In my truck I kind of hear a "WAH WAh Wah wah wah" when the TC engages at full throttle. Never-the-less, just to be safe, they DO include the cyroed parts. I think he said it cost them $8 a pound to get anything cyrogenically treated. He implied they only did it because of the thrashing they got on this site from "another vendor".

 

[DRR-24V]

Cryo=Stress Relief

We cryo a lot of Rifle barrels to relieve any built in stresses. I don't think it makes them tougher as they cut the same on the lathe afterwards. We try to finish all machining before we cryo.