Hi I have just purchased a 78 XC Fairmont Sedan and it doesn't want to change gear till the trans gets warm, any Ideas?

Bands sound rooted.

hey gary78,
ive just had a transgo stage 2 reprogramer kit, kevlar clutches & bands put in my c10 auto.
I couldnt & still cant get 3rd gear till she reaches 185f temp, i will read other comments with interest.

cheers
bruizer

You have a sticky governor... - very common on "C" series transmissions - especially after a rebuild!

When a transmission burns out, The clutch material etc lies on the bottom of the cooler in the radiator & if it is not flushed out before the new trans goes in, The new oil washes all the metal out into the rear cooler line back into the box (which enters the case via the governor) - instant sticky governor!

It is not a big job to fix it. The extension housing has to come off, Disassemble the governor & polish the valves with very fine wet & dry.

If you have an old trans that sticks the governor, It usually means it is making metal - Transmission rebuild time.....

Check your fluid level too.