Th350 not shifting at wot

[Justin79maro]

no.....if the kickdown is adjusted too tight...it will affect how high you rev before shift....so by removing the kickdown cable you are making the tranny ONLY use gov pressure for shift up at high rpm

Unhooked the kick down and floored it manually shifting, once going about 55-60 in second and it shifted to 3rd when I shifted. Second time I was going 20-30 in 1st gear floored it and it spun hard to I shifted 2 second but it stayed on the rev limiter, don’t know if it shifted but when I let off the car was in 2nd

 

[Fbird]

so it still will not shift ON ITS OWN at WOT? ......and no kickdown cable engaged?.
Next remove the cover on side of tranny to access your gov. to see if weights and spring are still in place. The gov and modulator valve work together to provide "automatic" function when in "D". Your kickdown does NOT seem to be influencing the NO SHIFT at WOT ...so the gov is the last on the list of easy checks from what I recall....but it has been a LONG time since i played with a th350.

 

[Justin79maro]

so it still will not shift ON ITS OWN at WOT? ......and no kickdown cable engaged?.
Next remove the cover on side of tranny to access your gov. to see if weights and spring are still in place. The gov and modulator valve work together to provide "automatic" function when in "D". Your kickdown does NOT seem to be influencing the NO SHIFT at WOT ...so the gov is the last on the list of easy checks from what I recall....but it has been a LONG time since i played with a th350.

Have not tried it on its own but I did pull the governor and all the pieces were there and they all moved like they should

 

[Fbird]

after reviewing the entire thread ...i see you already checked gov....my bad.

Have you checked that the modulator valve is getting VACUUM?
Other than that...you are outside my awesome troubleshooting skill set....lol

need to call somebody or wait for people that have actually worked on one in the past 15 yrs....been like 30 for me

 

[Justin79maro]

after reviewing the entire thread ...i see you already checked gov....my bad.

Have you checked that the modulator valve is getting VACUUM?
Other than that...you are outside my awesome troubleshooting skill set....lol

need to call somebody or wait for people that have actually worked on one in the past 15 yrs....been like 30 for me

Well when I was tuning the carb I used the port where my modulator line goes in at, so that part had vacuum but I don’t know about down at the modulator, I did replace it with a new one the old one you could suck on and feel a little pressure on it, no fluid was coming out of it tho. Just confused cause everything was set up this same way before and all of a sudden boom it don’t work right lol last time I had it not wanting to shift at wot was Bc I had to light of weights in the governor which I knew that since I was adjusting them, but now I have the stock weights in it and springs

 

[camaro71/holland]

Start by performing a full road test and report with results. Even better, buy/rent a pressure gauge and check the readings. Finding a problem in a transmission is eliminating everything that ís working correctly first, then narrowing on the problem area.

 

[camaro71/holland]

Hmm, for some reason the attachments loose sharpness/quality between my phone and the thread...

 

[Justin79maro]

Start by performing a full road test and report with results. Even better, buy/rent a pressure gauge and check the readings. Finding a problem in a transmission is eliminating everything that ís working correctly first, then narrowing on the problem area.

View attachment 115807 View attachment 115808 View attachment 115809

So let’s say it has good readings then what?

 

[camaro71/holland]

Isn't this what's happening (not reaching shift speed @ full throttle)?

 

[Justin79maro]

Isn't this what's happening (not reaching shift speed @ full throttle)?

View attachment 115982

I’m going to test out today just flooring it and see what it does, it’s been just pulling in the same gear even after I manually shift it and it’ll go to red line so I just let off and it will not shift