cmanns

So when I drive I often hear this nasty vrooom like wherrling sound in the back, it changes & gets really nasty sounding on acceleration, on very slight throttle (coasting) it completely goes away.

Seems theres friction, I couldn't hit higher than 80 on the freeway. It's been happening a lot recently, now first time last night it completely went away for a bit, fb was speedier and noise free.

I can't safely figure out where it is but it clearly sounds from the differential, do they make those kind of noises? It's a LSD & it's leaking about a inch in diameter of fluid a day

thunkrd

iTrader: (1)

maybe an axle bearing going out, mine is SHOT. it sounds like ****... are the bolts tightened on the housing? they like to loosen up over time. make sure it has enough 80w90

cmanns

At a lube shop they changed my tranny fluid for me & said the diff was leaking quite a bit, then after they were near done and the manager went to the car on the other side the guy below told one of the guys above to ask me if i'd like him to top the fluid off cause it was kinda low.

then I noticed it leaking more, it's a changing sound slightly. Sometimes it's like grrrrr then it constantly sounds sorta like a plane overhead/wherling sound very very loud.

How would I know if it was an axle bearing? When I changed my rims a bit ago there was no play in any of the wheels cept the front has about 1/4th cm of play in every direction (top, left/right, bottom) which seems to be normal on cars.

The sounds been increasing since I bought the car, at first it was only bad in 2nd cruising or if I downshifted to 2nd before a quick turn, now it's in every single gear, seems to go away when it's cold out side but eventually returned.

DriveFast7

iTrader: (1)

remove axle's and differential. check it out. you'll be glad you did and now have the skill to do this.

jinxed4dub

iTrader: (7)

my drive shaft (u-joints) were toast and it made that kinda sound and went away when I let of the gas. but it also shook the hole car.

cmanns

like a bumpy feeling?

I got bad u-joints too I think, if I let off the clutch quickly in odd situations and such I get this clunk, was only bad while I was learning stick though

trochoid

iTrader: (6)

That could be from bad u-joints, changing from accell to decell will show how much slack there is in the driveline. Get you diff fluid level checked and keep an eye on it. Once they get too low on fluid they don't last long at all. If it's leaking, fix it now while it's still a cheap repair. Fwiw, the rear axle bearings are sealed and lubed. You can run the diff dry and the axle bearings will still be ok.

cmanns

What do I need to replace to fix the leak?

*Opens fsm*

The lube shop said it's a very simple fix, said it was leaking at the plug i think ...

Shes still leaking about a quarter size every time i stop so I'm assuming it's still got fluid, Im gonna try to get at it I'd like to fix that along with my omp

DivinDriver

iTrader: (15)

Are you using LSD additive or LSD-ready gear oil in the diff?

How you fix the leak depends on where it's leaking from. If it's just leaking from the drain plug, it may only need tightening.

cmanns

I've never changed the LSD oil, so no idea.

I'm sure that lube shop would of tightened the drain plug if that was the leak

I'm looking under and the majority of oil is by the drain plug I can't see anywhere else oils coming from

wedweb

Are you transporting large guinea pigs?

cmanns

^nope, the most weight I put in the fb was 4 light weight old school enki rims which you can lift with your pinky finger lol....

Oh well ive had someone in the back for a short ride to another friends house before, I guess 3 people that weigh 150ish exceeded the gwr of the 1st gen?

thunkrd

iTrader: (1)

doubt it did anything.

jinxed4dub

iTrader: (7)

I exceed the weight rating all the time. I do drag the exhust alot when that happens

cmanns

^wow I've never dragged the exhaust lolol!

I checked and the drain plug is tight, seems to be coming out near the screws.

thunkrd

iTrader: (1)

tighten them.... they get loose over time. then check to see how low you are and add some fluid accordingly

btw don't tighten them too much, they can break

flamin-roids

I keep a bunch of bricks in the back of mine in case a riot breaks out.

mazdaverx713b

iTrader: (91)

i would personally aquire the necessary amount of gear lube, 80W90 works well and get a limited slip additive. remove the fill plug first, then the drain plug and drain all of the oil. before replacing the drain plug, inspect the threads to make sure there is no damage to them. reinstall the drain plug and make sure its snug. not so tight that its impossible to remove. it should be seated nearly flush with the axle housing. not completely flush but nearly. repalce the fluid with the proper amount.

next, put the trans in neutral, get under the car and inspect the u-joints. grab hold of the pinion side flange and grab the drive shaft close to the u-joint on the pinion side and rotate in opposide directions and check for play. should be very minimal if any. do the same for the front. when in doubt, remove the driveshaft and reinspect.

finally, with the car still in the air and the trans in neutral, rotate each rear wheel, one at a time. listen for bearing noise or at worse, grinding. grab the wheel at the top and at the bottom and wiggle it. it shouldnt move. if it does, this indicates slop in the rear bearing

one320fc

I havnt seen it happen much but my old 84 GS had a crack in the axle housing near or on the weld for the spring perch. it leaked and made all sorts of crazy sounds

cmanns

Anyone else on this? I think this may it it then... ill have to take a looksie

I would do this if i could remove stuff let alone even jack up my car...

it appears to not leak anymore (no fluid?) the sound didnt really get worse but my LSD's locking up funky all the time and making these odd sounds when reversing or turning in parking lots, etc so the lsd is probably dead now

oh well i learned what a bitch cars are