Line pressure after shift kit
I'm not going to fool with it much until I change the rear end because I'm sure the ratio change will change the shift speeds as well.
Absolutely yes it will change the shift speeds, to even earlier. With a given governor, increasing the driveshaft rpm by gearing is the same as driving faster with a smaller gear. The governor still shifts according to the driveshaft rpm, but now with a bigger number gear, this happens sooner.
So swapping from say 3.23s to 3.91s, the driveshaft rpm will increase by 3.91/3.23= plus 21%, at any given roadspeed. This is a lot, and this will require a different governor weight.
From the factory, there are only a few combinations of governor parts that I have seen, namely
2 slugs, three valves, and several valves. There may be more, I lust haven't seen them.
The pressure these combinations of parts will make, are made to fit the applications thru manipulation of line-pressure and fine-tuned with throttle pressure adjustments.
A&A Transmissions has whatever governor you might need.
