driveline vibration - getting worse
max427
11-14-2006, 08:48 PM
93' fullsize 302 automatic 3 speed OD with shift on the fly xcase.
about 3 weeks ago i started getting a slight driveline vibration that felt like poss u-joints. the vibration is only under torque, only at high speeds. its unlike any vibration ive heard before. its only from 40mph + under torque. but when i nail the throttle to pass, it goes away. the vibration also varies in severity according to conditions. it doesnt always do it. at a steady 70mph cruise its fine untill i get to a hill or have to pass. the pitch of the vibration also changes, once it starts giving it a little more gas makes it worse untill the truck downshifts and then it goes away. it feels like its right between the motor and the trans, but i could def be wrong. i hope its not a trans input shaft endplay issue because i dont have the money to dump into this truck.
any help would be useful.
other clunks and noises i figured id mention despite that i think they are unrelated. 2 distinct clunks leaving a stop sign, one clunk when stopping. sometimes theres a tapping type vib on the drivers side that feels like wheel hop or something but its intermittent.
about 3 weeks ago i started getting a slight driveline vibration that felt like poss u-joints. the vibration is only under torque, only at high speeds. its unlike any vibration ive heard before. its only from 40mph + under torque. but when i nail the throttle to pass, it goes away. the vibration also varies in severity according to conditions. it doesnt always do it. at a steady 70mph cruise its fine untill i get to a hill or have to pass. the pitch of the vibration also changes, once it starts giving it a little more gas makes it worse untill the truck downshifts and then it goes away. it feels like its right between the motor and the trans, but i could def be wrong. i hope its not a trans input shaft endplay issue because i dont have the money to dump into this truck.
any help would be useful.
other clunks and noises i figured id mention despite that i think they are unrelated. 2 distinct clunks leaving a stop sign, one clunk when stopping. sometimes theres a tapping type vib on the drivers side that feels like wheel hop or something but its intermittent.
MonRiverRat
11-14-2006, 09:04 PM
May want to check into a wheel bearing or needle bearing problem.
KimMG
11-16-2006, 01:48 AM
u-joints
max427
11-19-2006, 04:49 PM
also isnt there a cv right behind the yoke, before the first u-joint? should that also be replaced?
rhandwor
11-25-2006, 08:45 PM
Wiggle the connection between the transmission and drive shaft. You can change the bushing and seal without pulling the transmission. But you will need a special puller. OTC sells them. If you need one check on ebay for a used one. They also have an OTC sales who get you anything you want.
thunderbird885cc
09-27-2007, 07:57 PM
OK probably got it fixed by now but I had the same problem on a full size 89 bronco. My issues was with the CV joint ( U Joint ) right after the tailshaft on the tranny. There is a needle bearing in there that went bad and caused vibration clunking ect, it cost around 100 dollars to fix it myself, that solved that issue :icon16:
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