if my car is under load there is a bad vibration that runs through the car, its really bad in third gear at 3 to 4 thousand rpms and in fourth at abouth the same. it doesnt do it when its cold. i have replaced both front cv axles and have rebuilt the drive shaft, also swapt the t case and nothing has fixed it.... anybody have a idea?
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Rausch
Well-known member
Quote:
rebuilt the drive shaft,
Was it balanced?
Search the "wub-wubs" and you will find some interesting info regarding shimming the DS and the rear diff issues that may also be contributing.
rebuilt the drive shaft,
Was it balanced?
Search the "wub-wubs" and you will find some interesting info regarding shimming the DS and the rear diff issues that may also be contributing.
CarRacer
Well-known member
My car made a same sort of shuddering/grinding noise on decel. It turns out the intermediate shaft bearings in the transmission were taking a dump. How many miles on the transmission?
the transmission only has 50k on it, the vibration is just super strong on the front of the car
CarRacer
Well-known member
How many launches have happened during those 50k? Front localized vibration sound sure seems to point to the tranny to me. /ubbthreads/images/graemlins/dunno.gif
Hertz
Staff member
Balance shaft out of phase 180?
belize1334
Well-known member
You need to determine if it's an RPM based thing or an MPH based thing. That will narrow it down to one side of the transmission or the other. If it's RPM then you're talking engine or something on the input side of the tranny. If it's speed related then you're talking output side of the transmission or transfer case or prop shaft or rear differential or CV shafts etc.
Last edited:
toybreaker
iconoclast
- Joined
- Apr 30, 2006
- Messages
- 3,581
Welcome to the board, Matt! /ubbthreads/images/graemlins/smile.gif
I've ridden in this car, and this vibration is kind of funky. I didn't feel well enough to drive it myself, but the vibration threshold does not appear to be directly tied to engine speed or road speed, it seems to be more about load.
[edit]To clarify, you can run at any rpm/speed, and there won't be a problem until a heavy load is applied.
Once occuring, the vibration appears to be tied more to road speed than anything else, suggesting a driveline problem. A bad/binding/dry u-joint or c.v., or a problem with the carrier bearings were my initial feelings, but I also can't rule out a front/center/rear diff or internal transmission issue. I haven't been underneath this car yet, but Andrew and Gary are working on the problem, and I'm sure they'll find it.
In the meantime, I'm sure your suggestions are welcome, and appreciated.
I've ridden in this car, and this vibration is kind of funky. I didn't feel well enough to drive it myself, but the vibration threshold does not appear to be directly tied to engine speed or road speed, it seems to be more about load.
[edit]To clarify, you can run at any rpm/speed, and there won't be a problem until a heavy load is applied.
Once occuring, the vibration appears to be tied more to road speed than anything else, suggesting a driveline problem. A bad/binding/dry u-joint or c.v., or a problem with the carrier bearings were my initial feelings, but I also can't rule out a front/center/rear diff or internal transmission issue. I haven't been underneath this car yet, but Andrew and Gary are working on the problem, and I'm sure they'll find it.
In the meantime, I'm sure your suggestions are welcome, and appreciated.
Hertz
Staff member
A friend of yours is a friend of ours.
Good luck Matt.
Good luck Matt.
