Converted from a 4l60 to a 4l80 on the newer bodystyle Sierra, so basically just need any recommendations as to who can fabricate a custom driveshaft?

Since the local mechanic didn't do quite a good job of shortening it, that there's vibration and sound coming from under the seat directly, when accelerating from about 60mph, unless it could be something else...

Thanks

 

get it high speed balanced if that dosent work i know dennys makes some very nice custom driveshafts

 

Good luck with you in search of, I will be watching because I will want to upgrade mine soon!

 

do you have a driveshaft person around you?

 

check your pinion angles and your U joint. u may have a crappy one

 

No, that's why I got no choice but to place an order.

 

Call Strange Engineering. They will build u what ever u want. Prices are not that bad either.