[dbs600]

Transfer gearbox just replaced due to a high pitch wind-up and wind-down whirling noise upon acceleration and deceleration at 10 mph. Now hearing the same sound, albeit less pronounced / loud, at 55 mph.

Had the car back for 3 days, but went on a road test with the shop foreman today, who hears the noise, but states it may be normal or a radial noise. Told him it’s not normal, as the car didn’t do same previously and because the noise changed after gearbox replacement, also that I had the noise for about one year over the course of which I went through many tires. He wants to road test another similar vehicle and get back to me.

A helpful forum member believes the dealer may not have replaced the gearbox and simply drained it and that it may be a torque converter. Any additional thoughts on what it may be and how to handle the dealer if they come back stating it’s normal.

Extended warranty paid dealer $5k for the work.

Thanks.

[dbs600]

Long story short... after many transfer case replacements... noise still present and dealer now believes they've isolated the sound to the rear differential. The noise sounds to be coming from the front of the car, however!

Any way it's possible that noise from a rear differential can travel all the way through the drivetrain to what sounds like the front of the car!? Absolutely, definitely don't hear anything coming from the rear!

Also, any thoughts on what might cause a rear differential to fail? Never had such a failure before.

Thanks. :|

[EL Jeffe 5]

could this be due to tires you have on now

[dbs600]

Thanks for your question.

No, not due to current tires.

Went on many road tests yesterday.