1966 Mustang Coupe Auto Transmission Won't Stay In Gear

Piedmont Stang · 07-25-2009

Any advice on why my 66 Mustang will not stay in gear?

Automatic 3 speed, shifting from Park to Reverse the transmission connects for about 3-4 seconds, then it seems as if it is neutral, then it connects again for 3-4 seconds and the process repeats itself. It is the same in all forward gears.

66Sprint200 · 07-25-2009

It's low on fluid. Guess how I know.LOL Start the car and let it warm up. Then fill it up depending on how much it registers on the dipstick. You check the trans fluid while the engine is running and warm. You will use ATF transmission fluid. I recommend Castrol Type F Transmission Fluid.

nigel · 07-25-2009

Welcome to the site.

Piedmont Stang · 07-25-2009

Thanks for the advice, will give it a shot tomorrow. I just acquired the car about two months ago and I am still learning. It has been a lot of fun so far.

RagHead · 07-26-2009

Welcome to the site and good luck with your car