904 Shifting Points help needed

[74desertduster]

I have a 74 Dart Sport with a 360 and am having shifting problems.

It is a 904 with a Hurst V-Matic shifter. It also has a Lokar downshift cable on it. I don't know what converter or shift kit is in it. Engine and trans both look fresh.

Don't have a tach so doing my best describing this...

From a dead stop in drive it will shift from 1st to 2nd at about 22mph pretty much regardless of rpms.

But from 2/3 it winds up and the only way I can get the shift is to let up off the gas for a sec and then it will shift...hard.

This is my first Mopar in 25+ years so don't remember much...is there an adjustment for this..vacuum modulator etc?

Fluid is at proper level and it shift fine when I use the shifter manually.

Thanks!

Brian

 

[805moparkid]

ur kickdown is miss adjusted. the tighter it gets the more "throttle pressure" the tranny sees so it increases line pressure, i.e. makeing shift points later and harder.

just re adjust the cable to get it to shift where u want to.

 

[fishy68]

Re-adjusting the cable won't help. I say this because it shifts too early into 2nd and way too late into 3rd. If you loosen the cable to make 3rd shift sooner 2nd will be worse. If you tighten the cable to make 2nd shift sooner 3rd will be worse. My guess is somebody screwed up something in the valve body when installing the shift kit. Something in the 1-2 and 2-3 shift vales isn't right.

I'd pull the valve body and go through it and take out what ever kit is in it and put in a Trans-go TF-2 kit. It comes with modified shift valve springs so it pretty well evens out the rpm's on the 1-2 and 2-3 shift.

 

[MY340]

You need to re-adjust the Lokar throttle pressure linkage cable. Under light throttle it should shift out of 1st around 15mph and 2nd at 25mph. More throttle equals higher shift points. At full throttle you should have very little to no slack in linkage or cable. It takes a few times to get it adjusted properly. Too much or too little adjustment both cause shifting issues.

 

[74desertduster]

Yep...cable adjust did it....Thanks!