mx cruiso won’t shift out of 1st

[rhyne]

i’m in the dark on this transmission. i’ve scoured the web to no end. long story short, i put in a shift kit, but now when in drive it won’t shift out of 1st. manually i have 2nd. starting in 2nd, then shifting to drive, it goes back to 1st. i’ve replaced modulator, cleaned governor, fresh fluid, proper level. would rear band too tight cause this? i remember adjusting this by the shift kit install, but not even sure if this would be a problem if too tight. anyone have any ideas?

[Nitekruizer]

So it shifted before you put the kit in? This is an MX and not an FMX?

[rhyne]

yes it’s the mx. all good before. i’m going to pull valve body out and go through it again. haven’t been able to find a diagram to make sure everything is in place and that i didn’t lose any balls. i was very diligent about making sure everything was correct and left as i found it but who knows?

[mmerlinn]

i’m in the dark on this transmission. i’ve scoured the web to no end. long story short, i put in a shift kit, but now when in drive it won’t shift out of 1st. manually i have 2nd. starting in 2nd, then shifting to drive, it goes back to 1st. i’ve replaced modulator, cleaned governor, fresh fluid, proper level. would rear band too tight cause this? i remember adjusting this by the shift kit install, but not even sure if this would be a problem if too tight. anyone have any ideas?

Exactly what year is your transmission?

[rhyne]

hey there, it’s a ‘67. i had to drop pan to change out the shift arm(long story as to why). so while there i pulled out the valve body and guess what i found...

[mmerlinn]

hey there, it’s a ‘67. i had to drop pan to change out the shift arm(long story as to why). so while there i pulled out the valve body and guess what i found...

That is a one-year ONLY valve body and the last year the MX was made. Typically, core valve bodies for 1967 MX transmissions run in the $300 range.

[rhyne]

fortunately all the issue seems to have been is a screw backed out of that plate holding kickdown valve and one that controls pressure to governor i think it is. not sure how it worked out but all together now and seems ok so far.