transmission whine

[sergeshishik]

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Has anyone expereinced a pretty significant transmission noise from there 996. When I drive my car 50 mph + I hear a transmission whine while I am on the gas. Lifting off the gas the sound goes right away and re-applying throttle it comes right back and it is always present above 50mph.

Anypone experience this and possible have a solution to reduce or diagnose a bigger problem?

thank you

[JFP in PA]

What gear oil is in it?

[Matt Monson]

I posted in your cross post...

[sergeshishik]

unknown...do you think it is worth using SWEPCO? and is there a way to check the fluid level?

thank you

[Matt Monson]

No, changing to Swepco will do nothing.
http://forums.pelicanparts.com/porsche-911-technical-forum/678550-996-transmission-whine.html

I reiterate, stop driving your car and get it to a professional ASAP!!!

Regards,

Matt Monson
Guard Transmission llc
Guard Transmission |

[sergeshishik]

Little update, I finally got the car into my mechanic (a dedicated P-car guy) and he is not convinced that it is the pinion bearing. He did notice that the rear tires were 2 sizes too big Ugly situation, they were on the car when I bought it from the dealer and he stated that that may have caused some tranny damage.

We are swapping out the tires and I am keeping my fingers crossed that maybe that is all that was needed?

thanks for the submissions

[SimonP5150]

The tire size would only hurt the trans if the RR and LR tires were different sizes. Best way to tell a bad bearing is to take out the drain plug stick your finger in there toward the rear of the car and if you get a bunch (alot) of metal goo from the magnet, there's likely a bad bearing in the trans.

[dgk996]

You are describing the exact same symptoms that my '99 exhibited. I had the pinion bearings replaced in the gearbox, and all is good. The only noise I hear now is the wonderful PSE.

[BYprodriver]

Originally Posted by SimonP5150

The tire size would only hurt the trans if the RR and LR tires were different sizes. Best way to tell a bad bearing is to take out the drain plug stick your finger in there toward the rear of the car and if you get a bunch (alot) of metal goo from the magnet, there's likely a bad bearing in the trans.

If his car is a C4, which his signature indicates, it will if the diameter is different from the front. OP should mount proper size tires & check the magnet & replace the diff fluid with new Porsche oil.