Reducing dif whine

[Michiel]

Dear all,

If I renew sun and planet gears, planet gears shaft, and the 4 bronze washers, will the dif whine be noticeable reduced?

[les]

Not if you mix gears from different sets, or mix used with new.

[Michiel]

Les, no mixing,, all new from ESM, gears, shaft, bronze. Noticeable reduced whining?

[les]

For clarification, if the teeth of any new gear mesh with the teeth of any original gear a whine is likely, for the simple reason, gears wear together as sets. However if all the meshing teeth are new, you can’t do any more.

[Michiel]

I have a whining dif. Just wear and old. If I put those NEW parts in, will that noticeable reduce the whining.

[Guildbass]

I know many people get a bit uppity on such things, but I have used Molyslip gearbox for decades to reduce or even eliminate noisy diff and gearbox whine in bikes and cars.
It's worth a try, and may resolve your issue....

Jon

[StillGotMy1stCar]

I’m no expert, but sun and planet gears won’t make a diff whine, they only turn slowly when cornering.
The whine comes from the crown wheel and pinion, could be worn, could need setting up.

Regards John

[Michiel]

I know many people get a bit uppity on such things, but I have used Molyslip gearbox for decades to reduce or even eliminate noisy diff and gearbox whine in bikes and cars.
It's worth a try, and may resolve your issue....

Jon

Good idea! I'll try this Jon.

[Michiel]

I’m no expert, but sun and planet gears won’t make a diff whine, they only turn slowly when cornering.
The whine comes from the crown wheel and pinion, could be worn, could need setting up.

Regards John

This are the answers I was looking for. Thanks John.

[Bill_qaz]

Is you whine worse on drive or overrun?
Have you measured the back lash at the input.
Would agree Sun and planet gears very rarely cause a whine as driving straight they are not under any load, pinion the crownwheel set up or bearing are more likely.

[Michiel]

I've put new bronze in and the backlash at the driveshaft flange has been halved. Whine only when driving. Worst at 50-ish mph. Otherwise it is an untouched dif . Must be the bearings then. Molyslip advice seems worth trying.

[Bill_qaz]

I've put new bronze in and the backlash at the driveshaft flange has been halved. Whine only when driving. Worst at 50-ish mph. Otherwise it is an untouched dif . Must be the bearings then. Molyslip advice seems worth trying.

Are you sure it's not a wheel bearing?
What do you mean by new bronze? It's pinion and crownwheel setting that control backlash.

[Michiel]

The bronze thrust washers of sun- and planet gears. Specially the ones from the planet gears can be worn, so the gears can slide on its shaft. I saw this sliding taking up some slack when you move the driving flange back and forth. But I suppose slack is everywhere in my dif

[oliver90owner]

It won’t necessarily sort the problem. The most likely source of diff whine is the crown-wheel and pinion clearances. It’s a precision job setting up the difg.