ga

Does anyone else get a rear end growling only from time to time, not always, when turning left or right, typically from a standing start going up hill. Almost sounds as if you had studded snow tires on pavement, just on the turning side. Once straightened out, the noise is gone. Could it be the rear wheel bearings, or CV joints? Why only occasional, not always. Any ideas would be appreciated.
Thanks, ga

madmmac

Do you have LSD?

How long since your last tranny/diff lube change?

ga

Not sure about LSD......Had Swepco put into the tranny about 2000 miles ago.

ron mcatee

What year car?

ga

1986 Carrera with about 100,000 miles

ron mcatee

ga, I recommend you get the Swepco out of the tranny and put in Mobil 1 75w90 fully synthetic gear oil. Swepco is the preferred oil for the 915 tranny. You'll notice a difference.

ga

I thought that I had a 915 tranny.....do you mean a 950 tranny that the Swepco prefers?

madmmac

915=Sweepco 201

G50=You can use the synthetics

ga

Doesn't an '86 Carrera 3.2 have a 915 tranny in it?
ga

Oshin11

Um I believe that ga's car has a 915 tranny, G50 was introduced in 87. I think you might be confusing the heck out of him haha.

ron mcatee

You are right. I was thinking of the wrong year. Thanks for correcting me.

ga

So, do you think it could just be my new Yokohama Avid tires that are so grippy that they "growl" on the pavement, only sometimes, when going around a right-hand corner from a stop sign, on a hill ??
I am still confused.
ga

madmmac

Get your option codes from the sticker under your front hood or your owners book....limited slip differential would be...221.

Bearings usually make a howling type noise and would be very hard to hear at slow speeds due to the slow revolutions happening. Try going about 40mph put the car in neutral and let the engine idle as you coast to keep the noise down. Turn the car left and right, back and forth. Do your hear howling as you turn one way or the other? or your growling noise?

CV joints usally make a clunking type sound but I suppose they could growl but again, usually wheel revolutions make the noise louder.

ga

Thanks madmmac, I will try that & see what happens.
ga

Steve Weiner-Rennsport Systems

Ga:

You may also have a bad wheel bearing(s) but I'd check the differential as well.