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im using an UltraGauge, similar to scangauge. i can make the tps inctement at about 0.5% all the way from 0 to 100, no dropouts, no erratic behavior, pretty linear... was a test i did a week ago 😁 also keep in mind i tried with tps unplugged, and the 4th still does drop out with tps unplugged...

you wouldn't happen have a parts number for me, would you? O'Reilly's couldn't even find it last ai was in and asked, not that im going to order it there.... was just a while i buy oil and filter for the tans, do you happen to have that too? idea.

i changed fluids about 2k miles ago. see for yourself, i think i was the fist in there, at least its 20 years and 6k miles old, cause thats what i did drive with it. filter looked like brand new, not dirty at all. i just discovered that my MAF goes bonkers in rain.... i think i have an...

okay, plaid some more. coolant plug off, -40c in odb, dash showing real temp. no change in Transmission behavior. plug back on. tps plug off, boy what a change. transmission feels like a manual, switching real hard like a double clutch transmission but without the enfine adaptation to it, the...

let me also add, I'm currently traveling from Salt Lake City to Seattle. Im just into Washington (just made it onto I82 west), so if you know a good trans shop on the way, speak up pls. And i do have some serious mountains ahead of me, but ive been through Sequoia NP and passed through...

while under it i checked again, my cables go right into the big harness and up on top of the gearbox, over the driver's side valve cover then all the way up front over the radiator to the PowertrainControlModul. So I don't have en ECM and seperate TCM. I have one unit; a PCM. i also checked...

how about i throw a new harnesses at it the next time i pull the pan? cant be that crazy expensive. and probably that shift detector forward next to the plug and all coils as well? what would that cost? is it worth a parts cannon shot with known good quality sources? and ehat else is "know"...

oh, and don't have a MH on stilts, key on accessories on and then pull the gear selector plug while under it on a dolly... it'll decent right onto you... I've just learned that the hard way and barely got that darn plug over the hot exhaust back on. took a while for the adrenaline rush to die away

but i pulled the plugs on the gear selector modul, they are flooded with dielectric grease, looks like my prepre owner had that issue already, he bought it new and stoped using it due to health in 04 an died soon there after. since that 2004 until i bought it in 24 it made leas tham 100 miles...

harness plug is dry. and ive burned my arm on the exhaust... @#$?!##

who could? nope, what would be symptoms of contaminated harness?

Sometimes it opens lockup sometimes it goes to 3rd sometimes it goes to neutral. it never gies to second or first while at hwy speed selector always in od 4th since today it start doing the tc lockup kick out in 3rd too... but rarely

i agree with the first part. second part not so much, limp means all shift solenoids off and from my understanding thats a hard 2nd gear, but thats not what its doing, its actually neutraling... not going to 2nd.

I also can confirm that while I hold down the accelerator pedal with one foot anf tap break pedal with other foot, the TC lockup disengage as it should and comes back a few seconds later

ive gained some more insight this morning. when transmission is coldish, like not operating temp, it needs a significant road bum to act up and calms down as soon as thats over. when its hot, its really trigger happy for acting up, even on real smooth road. its more sensitive with cruise...

i don't see anything from ABS or Transmission on either my Innova 5210 from O'Reilly or my UltraGauge MX 1.3 i found someone who translated scangauge to UltraGauge for me, but the details we've found was for Allison transmissions, not the 4L80E and the results are disappointing also tried...

i cant find a TCM, cables go to the ECM, and i don't have a transfer case that woud require a TCCM..

ive been all over this engine (had the heads off, the exhaust manifold twice... haven't seen any other xCM... but i go ahead and follow the cables ... :cool:

the numbers come from scanner, and are congruent with dash indicator that has no numbers on it, but they move in tandem. and I've never seen it "hot", the most I've seen was 112C while idling to charge battery. (the hot air recirculates, its not a well sealed bay) amd 106 when going over...

thanks Marty, ive done just that in the transmission section. cheers Manny edit, signature updated