Hi guys, at startup she drops into reverse just fine always when put in drive we need 10min of limp mode in 4th until warm up complete then I drive fine all day! Limp mode is very smooth we roll around in 4th not going anywhere fast Lol!! Last week we did all t body sensors got some weird codes a weird fix be nice this morning its a Jeep!! no cat in her for years now todays codes 12,14,45, 11, 25, 21, 55!! I love the 45 code as it is not available on the sheet. code 21 will never go away it has been like that for years now but I have new sensors in the t body IDK if it matter, code 14 map sensor perhaps my new map is bad but would that put me in limp mode? 25 is "automatic idle speed shorted" I will need to see I don't believe this because we keep a 850 idle RPM plus that would mean 2 of of 3 new sensors were purchased bad weird for sure not impossible! I was hoping for trans solenoid codes not even sure if they were available. Any direction would great. I am not an auto mechanic but I have been able to keep her going, any direction be great! BTW tranny was bought 3 years ago with 10k on the rebuild I had to install my harness and the solenoids looked new then so I believe it was a true rebuild!
Thanks guys

 

There is no "limp mode". Sounds like a bad #1 shift solenoid to me. Test it's resistance both cold and once it gets warm and starts working. Also check the fluid level and adjust the cable from the throttle bod to the transmission. If that's disconnected or way out of adjustment, it can cause a lack of shifting.