Background: I have a restomod with a 5.7 hemi and 545rfe transmission. The car was tuned last September and everything was working correctly. Engine was performing good and transmission was shifting while in drive. I had a transmission line that was leaking and finally got it fixed. Lost about 4-5 quarts of trans fluid in the process. Transmission fluid if full. Took the car out for it initial test since fixing the transmission line leak and now I find it won't shift through the gears when the shifter is in Drive. Also, noticed that my speedometer is not working where it was working before. The car was only driven from my trailer to put it on the lift to get it in the air to fix the problem. We pushed it out of my garage to get it in my trailer. I'm getting a p0700 for the tcm and p0155 on the speedometer. When I test drove the car I had 1st and 2nd gears by manually shifting.
My question: Do you think I could reload the latest tune to see if it corrects the problem?