So my problem is I had the RC 2.5" lift installed on my 05 TJ for about a year no t case drop in it had slight vibes but it didn't seem too alarming. About 2 months ago I noticed there were what seemed to be oil stains on the flares, rear bumper, and undercarriage of my jeep. had to change the rear pinion seal because it was leaking. 1 month ago put in a .75" spacer up front to level out, had slight vibes around 35-50mph so i put a 1" t case drop hoping it would solve things. Only noticed vibes at around 45-50 after. Now I am getting vibes at those same speeds when I am accelerating and when I let off the gas which seems to occur from about 40 down to 20mph. It makes a grinding noise. and i noticed that there are stains on the fenders and bumper again. what should i do?
Have you tires balanced first just to rule out they are not the cause, then I would take it to a drive line shop and see if they can figure out where it is coming from. Or start testing things maybe take out the front drive shaft to eliminate that as being the cause.
2003 Jeep Wrangler Rubicon
4.0L, 42RLE, Dual Tops, Full Doors, JKS Front Disconnects, Cragar Soft 8 Black Wheels, 33x12.5x15 Goodyear Duratracs, .75" Front Coil Spacers, Bushwacker 6" Flat Fender Flares, Skid Row Steering Box Skid, LubeLockers, Rubicon Locker Mod, OBA, Cobra 19 Ultra III CB, 3' Firestik, Rough Country 2.2 Steering Stabilizer, RC 1.25" BL, RC 1" MML, RC Grab Handles, Fog Lamp Bent Pin Mod, 4" Apline S Series Speakers, Kenwood Excelon 6.5" Speakers, 6.5" JL Audio 6W3V3 Subwoofer (in center console) w/MTX Thunder 202 amp, IPF H4 Headlight Housing, Sliverstar H4 bulbs.
I looked under my jeep today and it doesn't look like either the front or rear pinion seals are leaking. I did notice though there looks like what seems to be scratch marks on the front drive shaft where the auto tranny skid plate is. Could removing the skid plate possibly make some of the vibes go away? I am not going to be wheeling much until I get a motor mount lift anyway so I am not really worried about the transmission scraping against anything. Would it be unwise to remove the transmission skid plate and just leave the t case skid? Not sure if it really supports the tranny.