update on late shifts

[kimcrwbr1]

Pete first off I did not sign up for your class! My book says control pressure tests should be performed anytime there is slip in the gear train or the shift dosent feel right. Harsh, delayed upshifts are the result of too much throttle pressure. A delay in the shift is more than likely excess modulated pressure. The original concern is the late 1-2 shift with light throttle pressure OK. The governor normally controls the upshifts using the speed of the output shaft on the tranny when the vacuum drops below a certain point the shifts are now controlled by modulated pressures or boosted throttle pressure. So back to the original post What are his options he can try backing out on the modulator spring pressure where it take less vacuum to allow the governor to control shifts. Second he can put different gears in the rear and front to offset tire size or third put stock tires on and then check the shift points and go from there. My recommendation is going with the smaller tires until he decides to do a lift for the larger tires and at the same time gear it down to reduce wear and tear on the tranny.

 

[PetesPonies]

Kim, we are definitely off topic a bit here. His shifts can be altered by adjusting the modulator valve. I would rather see him make a 1/2 turn adjustment first, but 1 turn isn't a deal killer. I just like to advise in slower increments. It is effecting line pressure and like blood pressure in your body, can effect a lot of things internally.

Now as far as the other rant of yours . . I am not trying to teach you like you were in my class too. That is why I suggested you go and do some learning on your own, because you are making a basic mistake in operation or at least the way you are presenting it. You are incorrect and I'm not going to say that again.

Broncobuck . . when you have had a chance to adjust the mod , let me know what happens and we will go from there.

 

[kimcrwbr1]

I thought I presented it pretty well maybe we are both right I`m just going by a factory OEM manual that is very specific on the different pressures in a modulated automatic transmission.
main control pressure
converter pressure
throttle (TV) pressure
boosted throttle pressure
modulated throttle pressure
sump (no pressure)
I have the tendency to go by the book it says to connect the pressure guage hose to the control pressure tap I guess my book is wrong?

 

[PetesPonies]

Kim . . I'm done OK? Seriously I'm trying my hardest to be nice. You need to learn a few things. Line pressure is what you measure with a gauge. It is what is effected by adjusting the modulator. That is what I'm saying. Hang out at some transmission forums Kim. You can pick up info there, reading posts and such. Let's get back to the original posters concerns. I'm done here . . if you want to discuss, PM me.

 

[kimcrwbr1]

Kim . . I'm done OK? Seriously I'm trying my hardest to be nice. You need to learn a few things. Line pressure is what you measure with a gauge. It is what is effected by adjusting the modulator. That is what I'm saying. Hang out at some transmission forums Kim. You can pick up info there, reading posts and such. Let's get back to the original posters concerns. I'm done here . . if you want to discuss, PM me.

http://www.therangerstation.com/tech_library/pdf_documents/A4LD_manual.pdf
I`m thinking you owe me an apology for being such a D(%K I found this here.

 

[broncobuckinaround]

ok guys i have an update on the b2's shifting

i changed the 32's to 235/75/15's

now the trans is shifting around 2500 with a light pedal. i have yet adjusted the modulator yet. i was driving and it started to misfire really bad and shut off with no restart. i found that the spark was intermittent off the spark plugs wires. it was the same throughout all the wires. coil fires just right.

so today ill be getting a new distributer, cap, and rotor. it also comes with the ecm. so ill be back on the road to further adjust the modulator.

 

[kimcrwbr1]

Just remember when adjusting the modulator use 35 mph with a medium throttle. The governor shifts it under light throttle and is not adjustable if it shifts into 3rd at around 20 mph with a light throttle the govenor is good. with medium throttle you want it to shift into third around 35 mph. The more spring pressure the later the shift, clockwise = more spring pressure the later the shift and the earlier the downshift when you get on it. The book says 12 mph on a 1-2 upshift with light throttle but with the larger tires you should see it shift around 14 mph. The govenor uses a weight and spring on the output shaft of the tranny to control shift points. That reminds me I need to do a tuneup on my engine also, when you change the plugs be sure and replace the PCV valve I do it as part of every tuneup with good results. Plug wires every other year for giggles.

 

[broncobuckinaround]

thanks kim. as soon as i get it back going again. ill be sure to adjust the modulator. ill post again when it gets done

 

[broncobuckinaround]

ok guys got another update. i adjusted the modulator. so far so good. i first did a 1/4 turn and nothing seemed to changed so i adjusted again another 1/4 turn and then i felt a difference. tomorrow after work i want to adjust it once more because i dont feel its quite there yet.