Also fwiw PATC has 6 pinion billit close ratio gear sets for the 60 if your trying to build the ultimate 60.
from what I've learned you can either use a fully built 60E or an 80 with a shift kit only the 80 will last wayyy longer and take more power, it's just doing the math to see what's cheaper built 60? Or 80 swap?

 

Where does one find the Extra Wide Heavy Duty double caged 29 element sprag for the 4L65E??

 

That sprag is a proprietary part for GM and GM reman facilities. You will not be able to get it unless you purchase a whole sprag assembly from GM and they are pricey. Last I checked they are like $200. You need to order one using a 2010 vin that would have a V8 or 6.0L in it. I know some the 09 TBSS used these and some of the later trucks if it helps. Vince

 

How do you manage a trans shop, and don't know where or how to get good parts?

 

Would you have a part number?? Is there anything else out there that is close to it? I found a dual cage 29 element sprag that is suppose to be used in high performance applications, don't know how good it is though. Thanks

 

 

I'll have to look and see if I still have it. Its been a while! In most cases I use the Borg Warner dual cage sprag and it works just fine. I'm pretty sure that is what you saw. If you would like to shoot me a pm with a link to what you saw I can confirm this for you. Vince