Auto box question

Post Mon Sep 30, 2013 12:43 pm

I'm about to change my auto box filter as been told it makes a big difference to it ? But what type of oil as been told I have to buy bmw auto gearbox oil is this true ? It's a 1988 316i auto

Post Mon Sep 30, 2013 12:58 pm

Box uses ordinary Dextron II (largely superseded by Dextron III) ATF - the same stuff as in your power steering.

Post Mon Sep 30, 2013 12:58 pm

I use Dextron 3 stuff and It works fine, no problems.

Post Mon Sep 30, 2013 1:24 pm

dextron III is backwards compatible so ok for cars designed for dextron II

Post Mon Sep 30, 2013 1:34 pm

Does it make a big difference when you change the gear box filter and oil ?

Post Mon Sep 30, 2013 7:17 pm

No difference whatsoever if the box is working properly, but it may make it work properly for longer if it's changed, and might just possibly revive one that's already failing.