Re: BTR Auto trans rebuilding
First of all i would just disconnect the S5 solonoid all together and resistively load the computer, just look up in the ford manual to see what the load should be and place that on it, second of all i definietly would not increase the oil pressure inside these boxes, there is absolutely no need to, if you want more oil pressure than change the S3 and S4 to the V8 ones, if you run my shift kit in it, then a stock tranny should easily be able to hold down that sort of power with no other mods, that is if the tranny is in good working order.
I have spoken to many different transmission shops, and performance auto rebuilders, and every one of them has said that when they have tried to increase the pressure inside them, it leads to the drums breaking or B1 return valve popping out.
on the subject of 85le, 91le, 93le, 95le, 98le, i have it on good word that there is definitly no differences in the drums, or working internals for that matter. In the later model boxes they have changed the valve body's, including solonoid changes, but line pressures have stayed the same with the exception for the V8 boxes. And many of these boxes are holding down power level's around what your talking.
Now with my car i just put in another transmission, I went to pick a part, and found 2 newly rebuilt transmission's there, without even looking through a quarter of the cars, i pull the box out and found it also had a brand new stall converter in it, i paid $117 for it with warranty.
Its now in the car, and it changes beautifully, nice hard tyre slipping changes, and all up it has cost me is $171 with oil and filter, not bad i think.
Now i would suggest that you go and find yourself a nice second hand transmission from pick a part or so, really cheap and stick it behind your motor, do my shift kit and see how ya go. Because what have you got to lose if it doesn't handle it, but what do you lose if you increase the pressure and a drum, or the oil return valve on B1 pack it in?