Now I have a grinding noise when I let off the gas/on the gas ....someone said I need a TC drop...but I only have a 2wd?

 

where is the grinding noise coming from?

 

you'd still be getting vibes from the rear driveline though.
hack 'n tap or SYE
(if thats your trouble)
Sometimes grinding/growling is your differential

 

it sounds like the front but I may be wrong

 

I had the same thing from the rear with about 4" lift. I took my aal off the other day which dropped the rear back down about 2" and it went away...so yes its probably a driveline angle issue. I'd throw a tcase drop on it. I think Rusty's has one for like $20.

 

yea i saw the one from Rustys but my jeep is only 2wd?

 

Ooh! (i.e. no tcase!) Sorry, you got me.

 

A custom length CV driveshaft should do it
http://www.4xshaft.com/index.html
If you call tom's, I'm sure they could help custom fab
something for your unique situation.

 

The ears on the driveshaft may be rubbing coming out of the trans, check to see if they are...Tj

 

I have a 2001 4WD that I put a modest 2" lift on, and I have what is obviously a driveshaft vibe from 30 to 35mph, but also a nasty sound coming from low and behind me when I let off the gas at higher speeds, sometimes when I put on light gas, and sometimes on bumps or coming out of mild turns at speed. It sounds really nasty, but after over half an hour with a droplight looking for the source I came up with nothing that looked like grinding.

TrekkerJmm: What are these "ears" you speak of? Does this apply to the later model slipyoke with the rubber boot?

 

I have the same driveshaft vibes between 30 and 35 mph. Mine didn't start till I went to 4.5" but I've heard the 2000-2001's are more prone to vibes from lifts.

The sound from the rear deff sounds like I driveline angle issue. Try shimming your rear end (both kriebz and Burns). That should help correct the angle.

 

Degree shims and t-case drop are on order. Now maybe I'll be able to stop modding (at least stop lifting) for a while and save up for the driveline improvements to avoid this once and for all.

I feel a little dumb; I went back and read the footnotes for the RE lift I bought and it basically said the same thing.