I just got my newly rebuilt transmission in WCJr, and I'm struggling with the TV cable adjustment.
If you google it, you'll find plenty of f'n morons on YouTube and elsewhere saying that all you need to do is adjust the TV cable to where your transmission 1-2 shifts between 10-15 mph, and 2-3 shifts between 20-25 mph. Bull$#!+. That's how I burned up my last transmission.
There are guys who tell you to tighten the cable up and then floor it and it will set itself. Apparently this works fine if you have a factory TBI, a factory TV cable, and a not-so-minor splash of luck. I'm running a Holley Sniper, and so far haven't found any luck. I did measure as carefully as I could and set up my bracketry to mimic the factory TBI bracketry. The arm radius appears very close and the throttle and TV cable distances are set the same as the factory cables. The Sniper does have Holley's throttle arm corrector on it, but not the TV cable corrector that Sonnax sells.
Then there are the guys who tell you that you need to set it with a pressure gauge, but they don't give you a clue which port to use, and the pressure specs are wildly different depending on who you talk to.
I plugged my gauge into the line pressure port on the driver side of the transmission and played with the cable until I got 75-85 psi on the gauge. Then I dropped the gauge and broke it. One quick trip to HF and the new gauge reads much more consistently than the '90s era gauge I was using. Once I got the new gauge installed I took it for a test drive with the gauge hooked up. It maxed out at 90 psi.
Then I tried the with the cable tightened all the way up and floored to self-adjust. I'm getting a very consistent 120 psi max. I can't get it any tighter without it resetting at full throttle. It seems to be shifting fine, but I know that's really temporary if the cable's wrong.
Is my transmission pump weak? Am I checking the wrong port?
If the transmission comes out again, the NV3500 is going in its place.