Drivetrain Concern

[blackgamer16]

Well to start off, am not sure if am just loosing my mind or if it is a problem. So i figured i would ask some supra owners about this.

problem:
when i'll be driving around 40-50ish and i'll hear a roaring type noise, like very faint. nobody hears it but me for some reason. And so i jacked up the car and checked my wheel bearings and the LR wobbled a little bit so i replaced both side wheel bearings and axles while am there.

Still got my same problem? I dunno what the deal is? Have you guys encountered the same problem or what some weak links in the rear causing this?

And i don't think its a tire issue but i'll be switching rims/tires so that could fix it, i dunno:aigo:

Blackgamer

 

[johnathan1]

When the diff. in my NA Supra went, it made a "roaring" sound, which slowly got worse...

 

[blackgamer16]

you see thats what i was thinking because one day i just did a burn out and my friend said only one wheel spun and i got a lsd in the rear. if it is the diff, i'll switch it out when it goes or buy me a good one, when ones proven worth the cash. Any other ideas guys?

 

[johnathan1]

Rebuild your LSD.

 

[GrimJack]

Heh... sounds like the fan clutch engaging!

 

[Nick M]

Diffs don't make a roaring sound, hence the problem with online diagnostics.

 

[blackgamer16]

You'll be suprised some newer model caddy's do it all the time especially CTS; its a possibility not saying it is my problem. Oh well, thanks everybody for the input and all.

Blackgamer

 

[jdub]

Well...if you think it's your differential...have you changed the LSD oil?

 

[johnathan1]

Diffs don't make a roaring sound, hence the problem with online diagnostics.

Really? Mine made a horrible grinding/roaring sound...sounded like i was dragging a boat anchor behind the car.

 

[blackgamer16]

yah i have, i used some GM synchromesh(sp) when i worked for a GM since it was free. I know it said use LSD oil only but its some good stuff and everybody at work said it should work fine.

 

[jdub]

Dude - GM Synchromesh is a transmission oil...specifically for the GM TKO 500 & TKO 600 manual transmissions. It might be ok for the R154, but it IS NOT for an LSD. It does not have the friction modifiers required for the LSD to operate correctly.

You need to get that out of the LSD...like now!

 

[Jeff Lange]

Thread moved.

 

[blackgamer16]

Crap, we'll thanks for the heads up...

 

[Nick M]

I have heard bearings that were bad make what the customer called a roaring sound.

But a broken tooth, or more likely incorrect backlash is a siren sound. In fact, that is what old sirens are, is gears with a gap built in. A broken tooth can be noisy though.