Noise from Underdrive transfercase gear set

[inkpot]

I already have my LRUD gears and my HRUD are ordered. Can't wait to get them installed and tested. I am on 37s with 4.88 gears, so nearly stock final drive ratio. I am running an overbooked TRD supercharger and water/alcohol with Landtanks MAF and oversized injectors. It is a little faster than stock, but my ultimate goal is being able to tow a camper better In the mountains.

 

[kevin in okinawa]

I was just googling this topic and it brought me to this thread, lol! Thank you for starting it. Today is the second day test driving (3.3:1 Sumo gears w/UD) and the hi-range whine is there...at least I now know that it's probably normal. Oh, and it's in a 61, not 80.

 

[Broski]

I just turn my hearing aids off and all is good
But really it's been my experience they quiet down after the break in a bit.