# 2003 Toyota Tundra TRD 4x4 hum/whine issue

**URL:** <https://community.cartalk.com/t/2003-toyota-tundra-trd-4x4-hum-whine-issue/96822>\
**Category:** Maintenance/Repairs\
**Tags:** toyota, tundra\
**Created:** [December 3, 2016, 2:59am UTC](https://community.cartalk.com/t/2003-toyota-tundra-trd-4x4-hum-whine-issue/96822 "2016-12-03T02:59:10Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Wolf\_Isfjord](https://avatars.discourse-cdn.com/v4/letter/w/49beb7/32.png) [@Wolf\_Isfjord](https://community.cartalk.com/u/Wolf_Isfjord)\
**Post date:** [December 3, 2016, 2:59am UTC](https://community.cartalk.com/t/2003-toyota-tundra-trd-4x4-hum-whine-issue/96822/1 "2016-12-03T02:59:11Z")

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Hello everybody,

I have a 2003 Toyota Tundra TRD package. Currently it runs flawlessly in every way but one…

When I engage 4-Hi on our snowy/icey roads here in Alaska everything works properly until I take my foot off the gas. There is a soft whine or humming sound that sounds like high rpms when iyou are shifting down to second or low going down a steep mountain road. This whine happens only when I take my foot off the gas and immediately goes away once I accelerate or shift back into 2wd. This sound does not occur when I am in 4-lo just 4-hi.

The whine doesn’t sound like any metal is grinding and there are no pops or bangs whatsoever just this high-pitched humming. 4-hi still works the way it should and disengages properly.