904 not going into 3rd all the time.....

Hello all.....the 904 trans in my dart shifts early from 1st to 2nd.....going into drive, it does sometimes sometimes it doesnt. Just out aan AFB Ihad laying around the other day.....could it be the kickdown cabke needs adjusting? Im sure it coukd use a new trans, but just trying to get it right...dont wanna buy a new one right now, as I plan on having the 340 built in a stout manner maybe the winter or spring.

If I shift manually from 1st to 2nd does fine, chiros the tires.....

thanks for any help in advance, this weekend is the first chsnce ive had to really work on it

Yes shorten the kikcdown linkage a bit & see what happens. Keep track of the amount (turns) so you have a baseline & can set it back if need be & that'd be an easy solution if that is it. 2-3 shift valve may be hanging up (worst case) or maybe just need a band adjustment but I'm just guessing. I'd wait for Kunkel to come to as he's the man on this

904 in a Dart should be linkage. What are you running that has a cable? I have my trannies set to be in 3rd before 35 mph on a light cruise. Need to be in 3rd when driving around town at low speeds. It won't shift into 3rd when floored before about 80 mph unless I lift off the gas.

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904 in a Dart should be linkage. What are you running that has a cable? I have my trannies set to be in 3rd before 35 mph on a light cruise. Need to be in 3rd when driving around town at low speeds. It won't shift into 3rd when floored before about 80 mph unless I lift off the gas.

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thanks for the responses everybody. Drove I thisbmorn and shifted great. The kickdown however. . Now it seems I got s vacuum leak csuse I cover the primaried and it dies.....

Ill see idf I cant try whst you guys are saying....thanks for all responses.