# Sabaru transmission downshift **URL:** \ **Category:** Maintenance/Repairs\ **Created:** [January 27, 2008, 7:57pm UTC](https://community.cartalk.com/t/sabaru-transmission-downshift/9913 "2008-01-27T19:57:20Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![jscott](https://avatars.discourse-cdn.com/v4/letter/j/48db29/32.png) [@jscott](https://community.cartalk.com/u/jscott)\ **Post date:** [January 27, 2008, 7:57pm UTC](https://community.cartalk.com/t/sabaru-transmission-downshift/9913/1 "2008-01-27T19:57:20Z")
my 1999 sabaru transmission downshifts from 4th to 3rd all by itself only when going downhill. whats going on? ---
**Author:** ![VDCdriver](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/vdcdriver/32/30_2.png) [@VDCdriver](https://community.cartalk.com/u/VDCdriver)\ **Post date:** [January 27, 2008, 8:04pm UTC](https://community.cartalk.com/t/sabaru-transmission-downshift/9913/2 "2008-01-27T20:04:30Z")
This sounds like the “fuzzy logic” that is programmed into the transmission controller is doing its job, in order to provide engine braking on a downgrade. You might want to check the SUBARU Owner’s Manual, as it may discuss the concept of fuzzy logic regarding the transmission. ---
**Author:** ![MG-McAnick](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mg-mcanick/32/188_2.png) [@MG-McAnick](https://community.cartalk.com/u/MG-McAnick)\ **Post date:** [January 27, 2008, 8:20pm UTC](https://community.cartalk.com/t/sabaru-transmission-downshift/9913/3 "2008-01-27T20:20:48Z")
Good question. Consider asking it at [http://www.ultimatesubaru.org/forum/forumdisplay.php?s=ea2f4b09ab0f0a83ab3ef92c1484b69e&f=3](http://www.ultimatesubaru.org/forum/forumdisplay.php?s=ea2f4b09ab0f0a83ab3ef92c1484b69e&f=3) if your owner’s manual doesn’t agree with VDCdriver. Personally I think it will.