Ok I have a 96 T100 SR5 x-cab, 3.4L V6 4x4, 197K on truck/trans and 50k on newer engine. If I cant figure this out im just gonna have to dump it off on someone..
It has a CONSTANT vibration, it vibrates the floor, seats and the steering wheel-infact the whole truck pretty much. It can be felt in any gear fwd or reverse, at any rpm range, take off, when on gas, strangely off gas its smoother but still there. Give it less gas and its not as noticable-still there tho. I just drove in fwd (4x4 with no rear driveshaft) and its still there
What I have done:
-REAR 2pc Driveshaft balanced, propeller shaft replaced, carrier bearing (2x), tailshaft replaced, u joints all seemed fine to them, I just pulled the shaft and they seem fine to me. They have NO play whatsoever.. done march 08
-All new brakes all the way around, calipers, rotors, discs, shoes, drums, wheel cylinders. No issues at all with brakes. done this past year.
-Tranny mount replaced, was worn. done over this past summer
-Motor mounts checked, all fine done this past summer
-Rear passenger side axle shaft, you replaced the bearing in there as well. T100s are known to have these go bad, I had it replaced this past summer and the vibration got much better. Before I had wheel hop severally-its gone now entirely. Could the drivers side be bad??? No way to tell without pulling it and bearing is 1x use, all parts are superseded by tundra parts so they all need to be replaced
-About the only thing I havent done is give it a tuneup, I got it with 50k on a new engine and I have only put on 15k so yea.
-The tires arent the greatest and cannot be balanced better than they are (trust me i been to 3 places). But even so off the gas truck is smooth. But, even so I traded YotaFun for his one day, still vibrates.
Whats left:
-Bad motor mounts. I checked these and so did a mechanic friend and my own mechanic-all said fine. Motor does not move around in engine bay when on gas powerbraking, all rubbers seem intact.
-One of the bodymounts on the cab isnt snug looking, I dunno but the rubber isnt against the mounts to well imho.
-Bearings, front, rear what have you..
-Trans has worn gears?
-Cant be the rear, thats disconnected right now and i changed the fluid 2x thinking that. 1st time no metal in there, 2nd time same. Fluid looked perfectly fine, no whine from the rear
I just dont know what to do anymore, YotaFun states it could be bad wheel bearings in the front and or rear. He drove my truck this past saturday and things after eliminating the rear driveshaft it could be the front ones as the steering wheel vibrates-but would the floors and seats vibrate too? He states that perhaps when I am on the gas they have more force on them and off less force means less vibration?
I just dunno anymore, this is becoming a headache as I cant drive the truck this way, its drives me crazy. What the heck else is there that could cause it to vibrate? I mean I replaced/checked nearly everything that is related to the drivetrain that one can service. about the only thing I can think of its the trans.. I did hear about problems surging with worn out plugs and wires not firing right and causing surges due to them not having a powerfull enough spark-but thats way out there imho.
So can anyone help me, throw some kinda ideas out? Im open to just about anything at this point.