KLRWS6

iTrader: (14)

I just had a turbo 400 and a shortened steel driveshaft put in and at around 3600 to 4500 rpms there is a huge vibration. I have had the driveshaft balanced twice and it's perfect. The only other problem is that the driveshaft has a little play in the tailshaft of the tranny. Could this be the whole problem? Also what is needed to repair. Thanks in advance

Stu Cool

iTrader: (13)

Read through this thread, may have to do with Drive Shaft Critical speed.

https://ls1tech.com/forums/conversions-swaps/473265-u-joint-angle-question.html

Hope that helps

Pat

FLT

iTrader: (1)

You can try a new bushing and seal in the tail housing. If this is your problem chances are you have other worn bushings in that unit. I would also look at drive shaft angle. Most vibrations are caused by this!

KLRWS6

iTrader: (14)

Thanks stu cool and da wrench