4.10's just installed, slight whine...

elite130 · Jun 14, 2006

I just had my 4.10's installed last weeknd (BTW best mod ever!). I have driven it about 200 miles and have notice a slight whine under load from 56-64 mph. This is not a loud whine and probably wouldn't notice unless you know what you are listening for. Should I be concerned about this, or just leave it? I always had a whine on my 7.5" and 8.8" rear-ends on my old '98 v6, although it was much louder, and had no problems. What do you think, should I worry about this?

helty · Jun 14, 2006

Ive had quite a bit of whine since having mine installed in November 05. Besides the whine, the car holds up fine to launches at the track, drives fine. If something should fail in the future, its just a reason to buy a beefed up rear end

menasci · Jun 14, 2006

sounds like the backlash wasn't set quite right. Nothing to really worry about. See if the installer will check it with a micrometer.

'01 Steed · Jun 14, 2006

I've always had a slight whine/drone with mine also. My backlash was set perfectly at .011" (the spec is .008" to .015"). Mine happens at virtually the same speeds as yours.
Don't worry about it unless it starts to become more and more noticable.

DeadLifter · Jun 14, 2006

You can set some gears up perfect and you'll still have a little whine in them.

Mike97gt · Jun 14, 2006

I got lucky with this one.. no whine.. but others I have set up the same way has had a tiny bit of whine.

just to be on the safe side you can check and make sure the pinion still is preloaded by shaking the flange up and down and feeling for play.

DeadLifter · Jun 14, 2006

Check the pinion for sure mine came a little loose on me guess I didn't tighten it tight enough to crush the crush sleeve. Retightened it and have no noise at all.

DisposableHero · Jun 14, 2006

just get louder exhaust

'01 Steed · Jun 14, 2006

Oh yeah.....what was the pre-load on the pinion? The numbers are different depending on whether you used new bearings or re-used the existing bearings.

BullittStangV8 · Jun 14, 2006

Mine had whine AND vibration (and no, I did not install them)...needless to say I ate up a gear set and had to have them replaced..I had the new set installed by a trusted shop, and the gears have a little bit of a "whisle" to them, but there is no vibration even at "higher speeds"

elite130 · Jun 15, 2006

I took the car out last night. It does whine exactly between 56-64 like I said. It buggs the hell out of me just because it is in the range where highway driving takes place. Oh well, I'm going to have them looked at to make sure everything is tight.

'01 Steed · Jun 15, 2006

It's probably normal.

If it bugs you now, don't do a rear seat delete. It gets VERY noticable when I pull my seats for the track.

Cobra Jay · Jun 15, 2006

Did you have them replace the bearings when the swapped the gears?

Don't wait to long to get it taken car of, other wise you'll ruin the gears and never be able to set it up right.

For those of you who have gears that whine-

Did you take it easy on them for a while or did you hammer on it right away?

'01 Steed · Jun 15, 2006

I treated them the same way I treated the car when I bought it new.....I hammered on them straight away (immediately following a couple heat cycles)!
There is no break-in period for gears.

Cobra Jay · Jun 15, 2006

[QUOTE='01 Steed]I treated them the same way I treated the car when I bought it new.....I hammered on them straight away (immediately following a couple heat cycles)!
There is no break-in period for gears.[/QUOTE]

There isn't? Yeah o.k.

You've been mis informed. There is no such thing as heat cycles!

'01 Steed · Jun 15, 2006

Whatever you say. You do what you do, and I'll do what I do. Chances are, neither of us will have a problem with our gears. This is off topic anyhow. Whether he babied them or not has nothing to do with his setup.

DocG · Jun 15, 2006

elite130 said:
between 56-64 like I said. It buggs the hell out of me just because it is in the range where highway driving takes place.

Speed up! My highway driving takes place between 75-80mph.

Seraphitia102 · Jun 15, 2006

[QUOTE='01 Steed]
There is no break-in period for gears.[/QUOTE]

The box of my Motive gears say "Break-in period required"

Cobra Jay · Jun 15, 2006

FAQ-http://www.jawsgear.net/store/catalog/faq.php

Even the guys I work with, some of which have 30+ years experience in the axle business say you should ALWAYS take it easy for a minimum of 200 before you hammer on a new set of gears.

'01 Steed · Jun 15, 2006

Seraphitia102 said:
The box of my Motive gears say "Break-in period required"

Does it state how long?

No such warning on my FRPP box.

4.10's just installed, slight whine...

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