[S4M4NO415]

Hey Everyone, I got a 1994 Mustang with an automatic transmission with overdrive and the car is on the original motor/tranny with 270,000 miles but surprisingly still runs. The problem that I am having is the car won't go over 40 mph with the overdrive on, all it will do is rev but not go any faster but when I turn it off it drives fine. What could be wrong ?

Thanks

[03.8TJmustang]

lol 270k miles on it...damn i want mine to run to 200k atleast n im happy xD. anyways to the matter at hand it sounds like a straight up transmission problem. its what i would first look at.

[S4M4NO415]

THANKS, you think it could be slipping or maybe it could be a problem with the O/D switch ?

[Markstang690]

hmm doesnt sound like a switch problem sounds mechanical.. done a tranny fluid change recently/regularly?

on a side note.. i wonder what the highest mileage mustang still on the road with the same motor is..

[232-K7]

270,000 miles? wow that's gotta be some kind of record lol.

sounds to me like your clutches are slipping between 3rd & 4th.
might be time to rebuild the transmission.
i agree, check the fluid level and condition first.

is the CEL on?
O/D light flashing?

[S4M4NO415]

Thanks, yea I checked the trans fluid and its good but its about time to rebuild or get a new one since the miles are so high... thinking about swapping to a 5.0 since the motor and trans are about to give up...lol