I did a 4.0 swap into my 1980 CJ-7 with a TF-999 when I put it in drive it shifts ok but there is not allot of power, but if I shift it myself I get allot more speed and power out of it. Also the kick down does not seem to be working I have adjusted it as much as possible with no luck. Is this a clue that my trans is giving me that I need a overhaul???
It seems to be upshifting to soon, when I put it in drive and take off at a normal speed or at a fast pase. When I'm going about 35 and put the gas to the floor it won't down shift. But I have adjusted the kick down cable as far as it will go in both directions.
If it's upshifting too soon then it's at least upshifting. I'd look at the kickdown cable adjustment again and make sure all the linkage points are freed up.... and perhaps a shift kit for the transmission so you can control the upshift points.
My guess about it upshifting too early is that the fluid pressure wouldn't be high enough to hold the bands and you would have some slipping/wearing. I have a dodge pickup that's parked right now but I am having the same problem with it's 727 after swapping on a four barrel carb last fall. Its been driven less than 300 miles since so I'm not worried that I hurt anything but I need to get the linkage fixed on it too. The kickdown linkage also sets the shift points on the 727.
Iím thinking, the HESCO instruction say rotate the throttle body to wide open throttle. This will cause the cable to ratchet to the proper zero clearance. But when I do this there is about ľ inch of cable exposed before it even engages when the throttle is depressed. My idea is to get a lead fishing weight and crimp it on the cable so it engages right away. If anyone has proís or conís about this let me know I donít want to mess my trans up any.