Outer Limits 4x4 Board

i just put new wheel bearings in the rear diff. new inner and outer oil seals, and new bearings.

on hard-ish acceleration, from 2500rpm to about 5000rpm, i get vibrations. i'm assuming they are from the back end, as it didnt do this before the new bearings.

what could this be?

the vibrations are almost like that of some commodores. i dont know if anyone knows, but some VT and earlier models had a vibration thing under hard-ish acceleration.

was it the axle wheel bearings? or the diff centre?, axle ones wont really cause a vibe unless ur axles r a bit bent, could be the tail shaft or ur pinion bearing.

didnt touch the diff centre, just put new bearings in the axles.

how easy is it to bend vitara rear axles? maybe they are a bit bent? will this do any damage long term or short term?

i have the same problem in my sierra but i dont really feel the vibration i just hear and see the transfer case leaver wobbling from side to side and this only happens under really hard excelleration at about 25KPH have changed the uni's in the rear tailshaft and checked all the T/F case mounts and still have the vibration.

i removed the rear tail shaft and run the car in gear and everything is smooth as so i am convinced there is something with the Tail Shaft/Rear end.

Cheers
Simon..

did u line the tail shaft back up properly???
they only go a certain way to keep it balanced and stop vibrations

Yeah i have done all that(dots line up)etc. Also the vibration only happens in 2wd or 4wd with the hubs unlocked and not in 4wd with the hubs locked in.

Simon.

must be ya pedes then???

Maybe you should have them then B4T.

I am thinking i have a bent tail shaft as i do remember it being there before i put the series 3's in. I think i notice it more now since i have better excelleration.

Simon.

If it's vibrating under hard(ish) acceleration then i would tend to think it's a bearing fit problem, they have to be spot on because any difference in rotation of the inner and outer race is gonna cause vibrations. My old man's landcruiser had a bearing go on it and had it replaced. Drove off and the thing was rumbling like buggery. Even the pro's stuff it up sometimes, and if you have put in 4 new bearings then it only takes one for a bit of noise.

monkeyplex wrote:If it's vibrating under hard(ish) acceleration then i would tend to think it's a bearing fit problem, they have to be spot on because any difference in rotation of the inner and outer race is gonna cause vibrations. My old man's landcruiser had a bearing go on it and had it replaced. Drove off and the thing was rumbling like buggery. Even the pro's stuff it up sometimes, and if you have put in 4 new bearings then it only takes one for a bit of noise.

yeah i dont know whats going on here. its not really going away.

the vit rear axles are not full floating, and the axles only have one big bearing on them. the splined end fits into the centre, and the centre only has 2 bearings. the centre is ok, i havent touched it, there hasn't been a need to, but maybe i bent an axle slightly wheni changed the bearings. the bearings fit on one way on the axle, and it can only go on straight, as its a real tight fit. theres no adjustment here.

Is axle wrap a problem with lifted vits?
Acceleration could be straining loose or worn parts and/or bushes, thus binding up the unis some what?
A wild stab in the dark? as I know zilch about vits.

Can't be certain, but I doubt you could fit a bearing wrongly without it being obvious?
It may just be that now its quieter and smoother, you are noticing a noise that already existed (I have done this many times)


christover

How in hell are you gonna check if you're axle is bent? Only other explanation could be a dodgy bearing(s) itself mabey?

Why did you replace your bearings? Because they were due or did one let go on you? Have a look at the old ones mabey uneven wear could have compensated for a bend in the axle and you would never had known.

christover1 wrote:Is axle wrap a problem with lifted vits?
Acceleration could be straining loose or worn parts and/or bushes, thus binding up the unis some what?
A wild stab in the dark? as I know zilch about vits.

Can't be certain, but I doubt you could fit a bearing wrongly without it being obvious?
It may just be that now its quieter and smoother, you are noticing a noise that already existed (I have done this many times)


christover

i get axle tramp when i am doing stand still burn outs on the bitumen. the tyres start to hop a bit after they start to smoke.

when accelerating, i believe the pinion wants to move up, and when reversing or decelerating, the pinion wants to move downwards. i have a worn upper ball joint on my rear diff, and there is a bit of play in it. i think it might be enough to throw the uni's out of whack, but then again, i have about 4" of lift. there's no slip shaft to mis-align, the vits have slip yokes into the transfer.

i changed the rear wheel bearings, and the back end feels so good and tight now (i'm not gay) its like new. i also changed all my worn ball joints in the steering, 6 of, and now it steers and tracks like new again. but now i have this vibration, and the gearbox is making some sqeeking birdy noises now. sheesh, it never ends does it.

monkeyplex wrote:How in hell are you gonna check if you're axle is bent? Only other explanation could be a dodgy bearing(s) itself mabey?

Why did you replace your bearings? Because they were due or did one let go on you? Have a look at the old ones mabey uneven wear could have compensated for a bend in the axle and you would never had known.

my rear bearings were well worn with all the mud and water i get into my diff all the time. the left rear had movement back and forth about 5mm, and i could push the axle in and out of the diff about 10mm. it still spun ok, no noises yet, but the right side, well, i opnly had 4 whole bearings left, and the other 4 where basically half spheres. i just dont know how the bearing didnt collapse.

'tapping' the bearings off, and the outer race broke off on both. the ball bearings were really worn, as they were all very small.


i guess with about 150kg of gear in the back (weekend camp) and about 150kms of bad corrugated road, and rocks, and water crossings, i dont think it did any good for the bearings. this is 3 week ends in a row.

well, i dont think there's a way to check if the axles are bent, but maybe running a small straight edge down them, you might be able to check.

How do you put the bearings on??
With a press or flog them on with a pipe and BFH?

Bad JuJu wrote:How do you put the bearings on??
With a press or flog them on with a pipe and BFH?

i pressed them on with some pipe and a hydraulic jack.

If the rear A arm ball joint is worn i'd get it replaced. if it lets go kiss your shocks, links, tail shaft etc good bye.

did you extend your links when you lifted it?

On a side note, did the rear wheel bearings on my girlfriends cruiser the other day (car was driving OK before hand, just thought i'd do them anyway) as it turns out the rear right bearings weren't really there at all. They were so worn that the races had almost welded themselves to the spindle.

After changing the bearings on the rear along with new axle seals etc now the front end wear shows up, so its time to rebuild the front diff. I figure while its being done i may as well do new spring bushes, tie rod drag link etc etc.

At the end of the day if you drive in remote areas some preventitive maintainence can go a long way.

You can always use glad wrap and a rubber band over the hub as a make shift oil seal too. Might save the wheel bearings if the seal goes at least.

monkeyplex wrote:You can always use glad wrap and a rubber band over the hub as a make shift oil seal too. Might save the wheel bearings if the seal goes at least.

maybe if i had a cruiser.

monkeyplex wrote:You can always use glad wrap and a rubber band over the hub as a make shift oil seal too. Might save the wheel bearings if the seal goes at least.

This kids is why you dont smoke crack.

Layto....

lay80n wrote:

monkeyplex wrote:You can always use glad wrap and a rubber band over the hub as a make shift oil seal too. Might save the wheel bearings if the seal goes at least.

This kids is why you dont smoke crack.

Layto....

Yeah i saw it done on a 75 series, but it worked. The guy was a crackhead.

Speaking of crackheads i saw this guy with a drover who frequently had water up to the window sills, i later saw he had no air filter or anything. Then again he got the thing for free, well $24 for rego plates.