Yea that new sonnax drum is bad ***. I would recommend any with 60e to put it. I was just at FLT talked to the owner about building my trans and he showed me that drum.

 

Maybe you had some wheel hop?
I dont see the output shaft breaking just with 400hp.

 

No wheel hop at all. I was hooking awesome on all 3 passes. I run caltracs and even readjusted them before I started making passes. Didn't even feel like the tires spun off then line

 

I haven't been impressed with the quality control of these stock input and output shafts. I've seen 10 of them or so and some of them looked mint, others had odd defects in them.

 

3 months later(sponge bob reference for those who have kids)

2doorfurry- Well another trip to the track and leaving on a trailer again! RPM stands behind there product but this is getting old.

The rest of forum members- Told you to get an 80 and never look back.

 

We'll see. It was a stock part that let go. So I'll give them the benefit of the doubt. Now that there is billet shafts. There isn't any factory parts in it anymore. So if it breaks, there isn't any hope in it at all and a 80e swap will be done.

 

For what it's worth I ran a 65e ( fully built w/ billet shafts) up until a month ago without issues behind 6k lbs. Granted I didn't beat the **** out of it and was somewhat cautious thus the reasoning for now having a 80e but... When it came out it was still working like a champ, and it now sits on my shelf.

 

Few have good luck but a huge percentage have 60 failures no matter who or how they were built. I just don't understand it. I have less then $500 into rebuilding my 60 twice. Reason for two times is a cooler line broke and killed it one week after the first build. If that hadn't happened I would have $350 in my 60e rebuild. Still killed me to put it back in but I would have at least $400+ in an 80 and probably more. I was un-employed and broke as a joke.

This is in my tuned, exhaust, daily driven Tahoe. I tow some but still didn't want to put a 60 in. They are good for cars and S-10s not real trucks simple as that!