Noisey when in low low

[madmac187 Junior Member Find all posts View Profile Close madmac187]

Hi all, live in Cairns. I have a 3.4 auto prado. Been a rocky relationship the last few months. This morning in work, I climb a hill no problem to it. I put the vehicle in low low moved forward. All good. As I increase revs in hear a low whiring, like an electrical motor. Put it back to hi low and hi I hear nothing. Then back to low low I can hear it again. There was no bang or rack or anything like that. Its been a while aince off road as its my daily car. It worked but the noise, would anyone have any clues as to what it is? Thanks for the help.

[lugueto Junior Member Find all posts View Profile Close lugueto]

Some cars whine while in low range... I installed a new transfer box on my previous 95 which was very noisy in LL. My current 90, although its a different Tcase, has a slight whining, as does the 2007 4runner..

[madmac187 Junior Member Find all posts View Profile Close madmac187]

It might just be that as I don't have any problems and climbed a 60 degree without problems.

[croozza Avid PP Poster! Find all posts View Profile Close croozza]

it is the normal sound of the fluid being pumped through the trans. Don't worry about it until it stops making that noise