stanglover0526

i have a 91 mustang gt with an aod trans. The trans has a problem. It doesnt want to shift on its own but if you put it in first and accelerate moderately then go to drive and back to first it shifts to second gear. It will not shift into any other gears. If you smell the fluid it smells new and it is clean and not burnt. It will not shift itself if you leave it in o/d or d it will stay in 1st unless you go to d back to first. i checked the tv cable when i bought the car because it had this problem whem i bought it. I put it away for the winter and now im wanting to diagnose the problem and fix it myself so i dont have to waste money on someone elses labor cost. I just went out and checked the tv cable again about a half hour ago and its still in adjusted correctly. The trans will down shift itself back to 1st when driving if i slow down to much and am not on the gas but it still shouldnt have done this because im still going about 25mph. If you put it in od or d it will stay in first and not shift out but if you give it about half shrottle and go 1st, drive, 1st in will shift to second, If you are in second and go to shift back into drive it acts like its in neutral or like theres no gear there. This is really frustrating me so im looking for any advice on how to get it going and not waste any money and find the problem before i pull it. Ive been told it might be the valve body.

95PhiveO

have you changed the filter when i bought mine it would drop out of drive on the highway to neutral, i would have to shift to neutral and back to drive to get it back in gear. Changing trany fluid and filter fixed that problem. I would also check to see the speed sensor is still good, I also replaced it on mine.

stanglover0526

the speedo does not work in the car but that doesnt have anything to do with the speed sensor rite?

nitrous_bob

when you checked the TV pressure you said was "adjusted correctly" how much line pressure did you read ?

i can safely assume the trans is toast

thats based on the 3 aod's that i wrecked b4 i finally gave up

95PhiveO

It does have to do with that but the speedo not working could also be the gauge gears, i would check the speed sensor, it tells your trany when to shift. its like 15 bucks i think and real easy to replace i would start there, but your trany could be toast too. Start with small stuff first. its nice when its something small.

Currently rebuilding my AODE*

stanglover0526

ill check the sensor, but im really not to worried if it is toast as i know how to rebuild it but i am going to try the easy stuff first so i dont pull it with no reason to.