diff noise while coasting??

[VR4-Quest]

Obviously there are several types of driveline noises associated with low tire pressures, defective axles, etc. but there seems to be a common issues with noise after lifting. I know for sure this to be the case as mine made noise on the test drive after installing the OME912's, and was fine before. We need to put our heads togther and figure this one out!

Again, Im talking specifically about a driveline derived noise, after lifting the VX with OME912s or equivalent, happens most notably when letting off the throttle at highway speeds (above 60 mph). Its accompanied by a grinding noise and vibration that can even be felt through the floor (fairly severe). There is also some noticable increase in vibration at lower speeds (around 40 mph).

I have lubed the U-joints and drive shaft, and check the level of all driveline fluids and there was no difference.
I have not yet changed fluids nor had the front bearing repacked lately.
I have maintained the factory rake (front 1" or more lower than rear) and the noise still exists.

Please add your comments, solutions if any, and feedback concerning this so we can determine the root cause!

[IndianaVX]

ive started noticing something similar, tell me what you think.....i am stock, factory rake,just rolled 70,000 i havent packed my bearings, or done my winter checklist yet either.
what im hearing is at lower speeds than mentioned thru this thread. as im driving thru town, or wherever, at 30 mph, when im comming up to a stop sign, for example, shortly after i start to apply my brakes, or even when i just let off the gas, i "hear" a sound like the transmission whinening down. its not grinding, it sounds smooth, not clunky. i also notice this noise when coasting down hill. but when im going UP a hill, and let off the gas, i dont hear this noise. it is very similar type sound as a bad brake pad rubbing on a rotor, kinda.......
i dont hear that well anymore after a surgery i had, but i do hear this, above the constant ringing, and pulse i have in my ear. i dont really have a clue as to wether it has gotten louder, or my hearing has gotten better enough for me to notice this noise, but now that i know its there, its got me in OCD mode, and i am listening to it intenly trying to determine where its coming from, and if it sounds "bad" or normal, which again, is hard to do when you dont hear in stereo, so to speak. but it "feels" like its coming from t.o.d, or tranny.
it sounds like its a pretty common noise. but like i said, im not lifted, and most of the previous post are from lifted vx's. oh, my tires are inflated properly too.
SUGGESTIONS??? check my fluids, and roll with it?
thanks guys for any input
and if your a veteran, it goes double......

david

[ZEUS]

SUGGESTIONS??? check my fluids, and roll with it?

I think that is a great start. Check fluids or change them, grease all fittings, repack bearings first; then diagnose. Who knows, you might find something when you get underneath it...

[Ascinder]

http://www.vehicross.info/forums/showthread.php?t=12009

fixed

[IndianaVX]

fixed my problem for 75 cents, (for the air pump) yeah, i know.....
i had filled my tires up just two days previous to the post, but there was a bit of a cold snap, and apparantly i lost 10 lbs of air in my right front, and that was making the wierd noise i was hearing, or actually the tire was making the TOD make the weird noise.
so yeah, a bit embarassed, but ill live...........

[Viatcheslav]

Obviously there are several types of driveline noises associated with low tire pressures, defective axles, etc. but there seems to be a common issues with noise after lifting. I know for sure this to be the case as mine made noise on the test drive after installing the OME912's, and was fine before. We need to put our heads togther and figure this one out!

Again, Im talking specifically about a driveline derived noise, after lifting the VX with OME912s or equivalent, happens most notably when letting off the throttle at highway speeds (above 60 mph). Its accompanied by a grinding noise and vibration that can even be felt through the floor (fairly severe). There is also some noticable increase in vibration at lower speeds (around 40 mph).

I have lubed the U-joints and drive shaft, and check the level of all driveline fluids and there was no difference.
I have not yet changed fluids nor had the front bearing repacked lately.
I have maintained the factory rake (front 1" or more lower than rear) and the noise still exists.

Please add your comments, solutions if any, and feedback concerning this so we can determine the root cause!

Any body have solutions of this problem? I have the same noise in my JDM VX, it lifted about 4 cm with springs from Trooper.
Please help me the noise is very bad!

[Sprey]

Any body have solutions of this problem? I have the same noise in my JDM VX, it lifted about 4 cm with springs from Trooper.
Please help me the noise is very bad!

Ive got the noise as well after lifting, and i have a jdm vx too.

Viatcheslav Are you driving in Tod all the time or 2wd?

I think with mine say im doing towards 100kmh and i coast i can hear the noise in TOD , but i think when im in 2wd the noise isnt there?.

Tho after greasing up the driveshaft and the u-joints the noise quietens down a fairbit.

Ill have a play 2mrw and see if the noise is louder in Tod or 2wd.

The noise i have sounds like a chaddering noise.

[Viatcheslav]

Ive got the noise as well after lifting, and i have a jdm vx too.

Viatcheslav Are you driving in Tod all the time or 2wd?

I think with mine say im doing towards 100kmh and i coast i can hear the noise in TOD , but i think when im in 2wd the noise isnt there?.

Tho after greasing up the driveshaft and the u-joints the noise quietens down a fairbit.

Ill have a play 2mrw and see if the noise is louder in Tod or 2wd.

The noise i have sounds like a chaddering noise.

I am driving in TOD and 2 wd, but I heared this noise when TOD and 2 wd but in TOD the nose rather more than in 2 wd.
First of all i think something wrong with u-joints I have replaced it but nothing happened then i replaced rear diff the noise still there.
Now I think the noise happen becouse angle of drive shaft changed as compared with stock.
What lifted your VX in centimeters now?
I have planing to change trooper springs for stock i hope it help.
Sorry fo my English

[Sprey]

Yea im running the ome 912, i think i gained around 60mm or maybe a tad more plus running a bigger tye - 265/75/16 to be exact.

Id say your right about the angle of the driveshaft. done

[Viatcheslav]

Yea im running the ome 912, i think i gained around 60mm or maybe a tad more plus running a bigger tye - 265/75/16 to be exact.

Id say your right about the angle of the driveshaft. done

I did it! I changed trooper springs on stock!!! After that i drived about 100-140 km/h the noise has gone!!!!
I am happy now, but my back not