Springs in the governor have little effect on a wide open throttle shift. The inner weights have more to do with WOT shifts.sabino56 said:As you can tell, I am new to automatic transmissions. I have rebuilt engines but never messed with automatic transmissions. I bought a used TH350 for our 65 Belair w/ sbc 350. I've had trouble getting it setup w.r.t. shifting where I want it. I adjusted the screw in the vacuum port to get shift points at WOT close but not exactly where I want them. At normal low driving, I'd like to move the shift points up a bit also. I can't get it to downshift like I'd want (I'm pretty sure I have cable adjusted correctly). It will occasionally downshift when crusing around 20mph (it's in third gear then - which is why I'd like to adjust shift at low throttle acceleration) but I can't get it to downshift from around 40mph like you'd like it when accelerating up a freeway onramp. The speedo gearing was way off when I got the transmission - almost 2x too high. I got that close by changing gears on both output shaft and speedo cable input. The bell housing has bolt pattern for both Chevy and what I'm told is "other GM".
All this makes me wonder if the transmission was orginally in something like a truck or something.
A previous post suggested it was the governor and I should check the springs. I wanted to look into that possibility and whether it might be setup wrong for my application.
Thanks for any advice!
Before I put transmission in car I counted wheel revs/drive shaft - I came up with 3.37 . The original engine in car was a 6 cyl with 2sp powerglide automatic. I have wheels very close to stock in diameter on car.Crosley said:Down shifts; if the speed-O was reading that high (2x) .... What is the rear end gear & tire size of the vehicle? Lower gears ( higher numerically) will cause the tranny to not down shift as easily with the throttle at WOT.