1993 4.0 5-Speed 2wd.

When you are moving, if you step on the gas, or let off the gas, you feel a clunk like gears "loading" or "unloading. it is a pretty noticable clunk though, it isnt just the rear end gears or something like that.

I just replaced the u-joints, midshift bearing, and rear axle and the clunk is exactly the same as it was before. any ideas?

i was thinking maybe internally int he trans or motormounts but any input is great

 

i would check the motor mounts and stuff.

could it be "slip yolk bump"?

 

i dont think it is the slip yoke. i greased it (uhhh..i think) ill check that

 

any other ideas?

 

Tranny ever been out of it ? Check the bolts on the bell housing.

 

it has been out. all bolts are tight

 

throwing parts at it will solve little , except to put a hole in your pocket .
Let some one else drive , while you take different positions in the truck
to get a better ear to the sound .

 

he isnt throwing parts at it.. the u-joints needed to be replaced bad. midshift bearing was toast, and rear end was replaced for better gears and L/S reason..

so far everything was replaced for a reason..

now your last advise is def worth it

 

the slip shaft was greased, i checked it today. mark, my dad drives the truck for work and cant be without it on a weekday

 

i will let you know what his plans are for saturday when he gets home

 

Mine Does The Same Thing Did U Find Out What It Is

 

if you feel the clunk under you I'd check out the axle pivot bushing(?, I think thats the name of them). Mine are gone and whenever the truck leans side to side I'll get a clunk from it. Its not really anything bad yet as the bushings are still there just really really soft. It also messes with your alignment if they are bad. I plan on fixing mine when I lift it as I have to take everything apart anyways.

 

no luck on this problem yet. im still totally stumped

 

Take it to my dad, I'm sure he can figure out what it is.

 

Shoot sounds almost like u have a bad u-joint drop your drive shaft down n feel if they move freely, you never know maybe u'll get lucky

 

I replaced my u-joints about two years ago with brute force parts.

My truck was making a clunking noise and bucking when i shifted, come to find out the rear u-joint was bad already.