07 GT transmission
My automatic transmission went out in D and R. 1-3 still worked. Having it rebuilt. Shop said it was completely done. 137k miles. Had some erratic shifts and clunking when shifting from reverse to drive over the years. I bought it new in 07 and have dogged it every day. In January I put on a CAI, XTC tuner and new exhaust. Otherwise it’s stock. I’m concerned the tune might have caused problems or finished it off. Any thoughts on if I should keep the tune on or remove it? Heard anything about this being a problem or did I just wear it out with my driving style? Thanks.