Above CEL codes while wheelin in snow and the won’t clear, looking for ideas to solve issue. Changed ATF, wasn’t low btw. Prior to throwing the 3 codes I’ve been seeing the following symptoms when off-road. The trans will forget how to shift automatically. Manually changing gears doesn’t work and if in Drive trans will fail to start in first, second etc making for a very slow acceleration since it’s “stuck” in high gear. Turning the engine off and back on will clear the shifting problem temporarily. When the 3 codes above popped, clearing the shift failures by restarting the engine only worked about 50% of the time. Currently trans is operating normally except I have these 3 codes. Help 🤔

 

What are you driving?

 

P0733 Gear Ratio Error in 3rd
P0734 Gear Ratio Error in 4th
P0735 Gear Ratio Error in 4th Prime
You can get a better idea what the issues is by looking them up here.

 

2015 JKU Rubicon with 1 T ud60 axles

 

Thanks Moparite, nice in depth info but couldn’t find a solution. In another forum for a different trans but similar codes they called out the input speed sensor which I thought sounded reasonable but I haven’t located it yet in my 2015 JKU wrangler.