# Wont upshift **URL:** \ **Category:** Maintenance/Repairs\ **Created:** [August 23, 2007, 8:16pm UTC](https://community.cartalk.com/t/wont-upshift/3560 "2007-08-23T20:16:33Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![ANNOYED26](https://avatars.discourse-cdn.com/v4/letter/a/e47774/32.png) [@ANNOYED26](https://community.cartalk.com/u/ANNOYED26)\ **Post date:** [August 23, 2007, 8:16pm UTC](https://community.cartalk.com/t/wont-upshift/3560/1 "2007-08-23T20:16:33Z")
I HAVE A 1992 DODGE DAYTONA 3.0 LITER AUTOMATIC TRANS. WHEN PUT IN DRIVE THE CAR WILL NOT SHIFT ITSELF UP. I HAVE CHECKED THE TRANS. FLUID WHICH SEEMS TO BE OK.ARE THESE TRANS.ELECTRONICALLY CONTROLLED? MAYBE I NEED A NEW SWITCH OR SENSOR? WHAT ARE YOUR THOUGHTS? ---
**Author:** ![transman618](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/transman618/32/24_2.png) [@transman618](https://community.cartalk.com/u/transman618)\ **Post date:** [August 23, 2007, 9:57pm UTC](https://community.cartalk.com/t/wont-upshift/3560/2 "2007-08-23T21:57:15Z")
If this is a 4 speed trans, it will be electronic. Its entirely possible that the trans has defaulted to 3rd gear limp mode. I would scan it first… transman ---
**Author:** ![Marc\_Schultz](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/marc_schultz/32/268_2.png) [@Marc\_Schultz](https://community.cartalk.com/u/Marc_Schultz)\ **Post date:** [August 26, 2007, 2:27am UTC](https://community.cartalk.com/t/wont-upshift/3560/3 "2007-08-26T02:27:14Z")
Not sure about that year truck, but newer model transmissions have a computer similiar to the main PCM. If the transmission ‘computer’ doesn’t know the transmission is in third gear, it probably will not upshift. I remember reading about something called an “inhibitor switch” that was related to this sort of thing. ---
**Author:** ![transman618](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/transman618/32/24_2.png) [@transman618](https://community.cartalk.com/u/transman618)\ **Post date:** [August 26, 2007, 5:52am UTC](https://community.cartalk.com/t/wont-upshift/3560/4 "2007-08-26T05:52:57Z")
??? transman