My recently-acquired Tundra 4X4 has never had the gear oil changed in the differentials or transfer case.
The manual calls for API GL5 75W-90 gear oil. However, a guy at a very reputable high-performance 4X4 shop said he puts ATF in a lot of differentials. Subsequent Googling has indicated that others do this, too. But it doesn't seem widespread. He said 75W-90 was "old school."
As I am going to do this work myself, I am trying to decide whether to just go with what the book calls for or use ATF.
Will ATF be harmful if I change it every 30k mi? Will there be any benefits in terms of economy, performance or MPG?
Thanks.
The manual calls for API GL5 75W-90 gear oil. However, a guy at a very reputable high-performance 4X4 shop said he puts ATF in a lot of differentials. Subsequent Googling has indicated that others do this, too. But it doesn't seem widespread. He said 75W-90 was "old school."
As I am going to do this work myself, I am trying to decide whether to just go with what the book calls for or use ATF.
Will ATF be harmful if I change it every 30k mi? Will there be any benefits in terms of economy, performance or MPG?
Thanks.
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