what is this.??
 

when im cruisin 50+mph my whole truck shakes...it almost feels like a tire might be out of balance but it doesnt do it all the time..and it only does it in od...any ideas?

Tranny time!

:argh::argh::argh::argh: yeah i would agree sounds like your tranny is slipping:argh::ouch::itsok:...o well now its time to make sure it doesnt happen again:choochoo:

Ya it could be your T/C

Has your trans been running hot?

well i had gas buner that did that and its was my drive shaft u joints but i dont know whole lot thought id thro that out there

I had that happen on the 89 and I balanced the tires. By some sort of elvin magic it stoped. I would balance before I bought a new T/C

I dont have a trans temp gauge but I think I have pretty much ruled out a tire out of balance....but im gonna take it in next monday to see bout the tranny, if it is i reckon it's time to build one..I knew it would juss be a matter of time.

CHECK YOUR U-JOINTS. ONE COULD BE LOOSE AND LOCKING INSIDE THE CAP SO YOU DONT HAVE IT ALL THE TIME...

drive shaft u joint
 

yeah check your u joints in your drive shaft I had to replace one, it didnt shake all the time at first but it did over time tell I changed it.