transmission works great while cold, shifting problems when warmed up

[mechjames]

[updated: broken intermediate bands] transmission parts

alright, if you've been following my previous thread about the back off throttle and the 1st gear to 3rd gear issues, this has sort of been resolved.

by playing with the bands, it now shifts perfect all on its own at the right time in the mornings for about 5 minutes, then it goes back to me having to back off the throttle to shift. i barely have the shift 1-3 issue anymore, depending at what speed i'm driving. if i floor it from a stop, it'll go right to 3rd, if i take it easy, it'll go to 2nd then 3rd.

but mainly what i want to know now is why it works like new while its cold. i believe heat is causing something to expand, then it loses pressure.

At the current time i don't have the time to take it to a transmission shop, as i'm in school 5 days a week and work after school and saturdays. usually the hours i'm not in school or working the shops are all closed.

transmission guys, chime in. the symptoms are different now and i think its for the better !

 

[BrooklynBay]

It might be the valve body gaskets since it's temperature related. When you were having the band issues, did you replace the servo pistons or did you just adjust the bands?

 

[mechjames]

i didn't get around to replacing the servo pistons, just adjusting the bands

 

[mechjames]

new symptom.

run it to full throttle in first gear, it'll shift quick into second at redline, with just a touch back off the throttle. to get to third you bring it down to 1500 rpm or so then hit it again. this is during hot temperature.

 

[mechjames]

alright, i dropped the pan today, and a piece of the band made its way into the pan. i guess the band was fractured before and losing pressure, and by tightening them, it eventually got worse and broke.

i think i'm just going to pop on another transmission, but how hard would it be to just put a new band in? whats involved?

this summer (if i swap in another one), i think i'm going to follow the rebuild diary and build the old one up with updated parts, but whats involved in a band change?

 

[BrooklynBay]

You have to open the entire transmission to get to the bands. The front overdrive band requires removing the bell housing with the front pump, but the intermediate band is much deeper in.