Transmission going out? Please Help

[rltvader]

Hey guys, I have a 1969 F100 with a 302 and a C4 Transmission. It is shifting but it is delayed more than usual, and at 60mph, it takes forever to shift into third gear, I am going to put some extra fluid in soon, if that doesnt work, what can I do?

[BobbyFord]

Check the vacuum source and the line going to the modulator valve. Also, pull the elbow hose off of the modulator valve and see if the valve is leaking fluid.

[rltvader]

thanks, the fluid is still red so its not getting too hot, ill check tonight. It was fine last night, but today it was acting weird.

[flyboy2610]

Remember to check it when the engine and tranny are both nice and warm. Don't check it cold, it'll give you a false full reading.

[rltvader]

checked this morning after 30 min drive to school, said full

[Donnie]

I'm with Bobby Ford on this one..If your 1/2 shift is late also, check your vacuum system from the intake to the modulator..look also for ANY leaks in the intake, E.G., a vacuum cap off???
Bad modulator valve....If there is nothing wrong in this area ..........repost...Donnie