Whenever i get on the gas to take off, i get a really weird shaking feeling, almost like its hopping in the back, but im not spinning the tires or anything im just pulling out. I had a friend look under the jeep today as i pulled forward and backed up and pulled forward again multiple time to see if he could tell what it was and he said maybe a universal or something is wrong in the differential.

When i bought the jeep there was a u-joint in the back of the jeep just sitting there but i didnt think much of it at the time. I want to know what you guys think of this and what it might be?

 

this is my first jeep, and my first 4x4 so im no pro and im sorry if i ask stupid questions.

 

After "take off" does run smooth?. Does shift correct?. Any noise?.

 

Sounds like a U-joint, had a Ford P'up that did that. If the u joint you found is new just put it in.

 

After i take off it will slip alittle bit up in rpms and then come back down with a bit of a grinding noise, i was assuming that was a different problem, i bought a transmission from a guy i work with that he took out of his jeep before he sold it for parts to a friend.

 

Flush the transmition and see if that help. The torque converter my be going out.

 

hey thanks trucker, i will definitely try and flush the transmission before i go ahead and put in a whole new one, i think i may have a leak in the transcooler lines, would that cause the torque converter to slip??

 

You should see leak down. Low fluid level will do it.

 

i may just have to fix the leak then, ill fix any leaks, flush my current tranny, replace the fluid and see if that fixes it, and if not then i will go ahead and install the new transmission and see if that helps. About the shaking feeling taking off however, Should i try to fix the axle u joint to see if that will help?

 

Sounds like the viscus coupling in the T-case. You have a 249 or 242?

 

would it be engraved right on the transfer case, i really dont know which one it is or how to tell.

 

There should be a metal tag on the back side of the transfer case, left of where the rear drive shaft hooks up.