Hi,
I just rebuilt the 727 for my 440 Challenger, installed new bands, clutches, rear billet servo etc and a Trans-Go TF-2. The trans and valve body are both 1977 parts. I never had this VB installed in the car before so it might be faulty, although I dind't find anything wrong with it while installing the TF-2.
I adjusted the kickdown-linkage correctly, have WOT 2-3-upshift at 75mph with 3.23 gears. The WOT 1-2-upshift is at a low 35mph and it doesn't seem to use the PTK (which definitely is installed).
Low throttle upshifts are at 15 and 25mph which seem to be a bit on the high side but I can live with that.
What can cause this early 1-2 upshift while the other is ok? Car feels slow at low speeds, not using PTK adds to this
This was the first time I installed a TF-2. I found the instructions quite confusing here and there. But I got older instrucions from another guy which cleared up something. I hope but cannot guarantee that I did everything correctly.

Jens

If you used the small black spring supplied in the TF-2 kit in the PTK module it will lock out the PTK at a lower speed than the original.

With your correctly adjusted linkage how much linkage travel remains with the carb at WOT? Is the carb stock?

I don't think I changed anything on the PTK. Didn't notice that there was a spring included. I can try to find out, reread the instructions but I don't think so.
Carb ist a Holley DP. At WOT the linkage has a remaining travel of about 2-3mm (a bit less than 1/8"). I had tried different settings. No travel lead to shift points above 80 so I shortened the rod. That makes me think that the KD-linkage is adjusted correctly. Can there be anything wrong in the VB? Too much clearance between a valve and its bore? I have the original VB (1977 also) from this trans still lying around. It was somehow made up to shift manually (no kickdown linkage installed), thats how I drove the car for the last 8 years. As I didn't understand how it was possible that it had to be shifted manually and still don't burn any clutches/bands I wanted to leave that VB alone and disassemble it later to understand it. Maybe I can use that one. Change it for the TF-2 I used in the other one and install it. But first I'd like to learn what could be wrong....
What do you mean by "it locks out at a lower speed"? I read the PTK works until about 40mph. Will the TF-2 spring change this speed?

Jens

I looked into the TF-2-instructions. I didn't install the black spring at the PTK limit valve. That would eliminate or diminish PTK downshifts. I like the PTK (on my other car) and would not change anything.
My main problem is the early 1-2 upshift at WOT (of course, at all loads also).

Whats the job of the governor on the 1-2 shift point? Which part of it influendces it? Or is the gov only for the 2-3 upshift? Never understood that...

Jens