4low

mudtaxi · Post by **mudtaxi** » Fri Dec 28, 2007 9:55 am

ok when it is in 4low my truck vibrates like crazy it has never done this before any ideas

roadrunner · Post by **roadrunner** » Fri Dec 28, 2007 4:07 pm

Just a guess. Check driveshafts for bad u-joints or badly worn splines. Don't rule out the front drive-axles either. All these will do funny things under increased torque of Lo4 drive. Additionally check rear trans mount for looseness or breakage. All or most of these will be aggravated by lift kits. Double check front differential mounts as well. How high are ya lifted?

mudtaxi · Post by **mudtaxi** » Fri Dec 28, 2007 5:39 pm

6" superlift and a 2" body

Post by **HenryJ** » Fri Dec 28, 2007 5:54 pm

Have you replaced the front driveshaft with an aftermarket U-joint driveshaft?
If not, remove the front driveshaft and see if it is the problem. There are a couple good threads on converting the front shaft to one that will handle the increased angle. More than a few have blown the front shaft at the CV on our stock shaft.

mudtaxi · Post by **mudtaxi** » Fri Dec 28, 2007 6:14 pm

yes i have replaced it thats why i replaced it i blew 5 boots

Post by **HenryJ** » Fri Dec 28, 2007 6:17 pm

Good. An aftermarket shaft is easy to pull. Pull it and try. That will help to diagnose where the problem lies.

roadrunner · Post by **roadrunner** » Sun Dec 30, 2007 11:15 am

Good call Brule!

Right where I was headed!