I've got a C6 transmission I need some advice about. It is the wide ratio, with shift kit from Jay Broader. When I have my foot to the floor it won't shift out of passing gear. If I let up just a little, it will go ahead and shift as it should. The only adjustment I've made myself is to turn the screw in the modulator counter clockwise to give me earlier shifts between normal gear changes and it also eliminates the jerk your neck takes when shifting. Why would it not come out of passing gear under full throttle and work flawlessly by just lifting your foot a smidgen. Jim
OK, that didn't work. 1/2 kick down rod travel won't let it go into passing gear. I restored it to the original position so it would work. I don't understand it. When I first got the car someone had sandblasted the accerator bell crank and the passing gear kickdown lever was stuck. No matter what you did it wouldn't come out of 2nd gear. I took it out on the interstate and let held the gas pedal down. It finally shifted at 85mph. That was with the COM transmission. So, I'd think the C6 would be the same way. There's got to be a point it would come out of 2nd gear, but it don't. Jim
Jay Broader called me and talked for a while about this problem. He wanted to send me a new governor. I would have had to take the tailshaft off the transmission to change it. I don't have any leaks, it works great other than the passing gear thing so I declined his offer. I ain't touching it. I'd rather shift it myself than take a chance of it popping back into 2nd gear doing over a 100mph. When racing my buddy the other day we were over 100 mph and I was still in 2nd. Problem was I needed third gear around 90 mph. Jay said the only way to fix it with reliability was to change the governor. Thanks for the responces guys. Jim PS When Jay built the transmission for me he installed the parts to make a drag racer out of the car. I went to a higher rear gear and lower rpm stall converter later to turn it into a show/cruiser car that got gas mileage. It's my fault it's got the wrong governor for the application.
This message has been edited by Fifty7Fairlane from IP address 126.96.36.199 on Jun 14, 2012 7:42 PM
By golly with the determination you're showing in helping me it's apparent to me you know something that I don't or have seen this problem before. I will hook it back up and try what you're saying tomorrow. Thank you, Jim
Let me rephrase this. I pushed the gas pedal all the way down eating into the carpet, adjusted the bellcrank kickdown tab by placing a 1/8" piece of stock between the tab and rod lever at the rod limit position. I then adjusted wide open throttle to this position. This should give me 1/8" more travel of the kickdown rod at wide open throttle. I'll adjust one turn at a time starting from this point either up or down considering what it does. I'd still like to know if transmission kickdown at slower speeds is a function of something other than the accelerator passing gear kickdown rod.
I'm down to within approximately .150 of travel. Now, I have a question. At slower speeds 20-40mph the transmission will downshift to second and kick out at approximately 55-60. Is this the modulator handling this function? If you're doing 55-60 mph it won't kick into passing gear like it did before. I just want to make sure of where I'm at right now.
I want to thank you for the patience you have shown to me fixing my kickdown. I set a .060 shim between the accelerator bellcrank kickdown tab and the kickdown lever at the limit of travel on the kickdown rod. This time I had my buddy hold the gas peddle to the floor while I made all my adjustments, I set carb at WOT at this point also. I took it out on the interstate doing 60 mph and floored it. It went into passing gear (wouldn't before) and stayed in until 75 mph and then went into third. I held it down until it reached 95mph and it didn't go back into second. I did this three times, never got caught, so I quit after that. At 75 mph third gear is pulling hard and I'm more than satisfied, it's a complete transmission now. I have my modulator screw turned in just enough to make you realize you're dealing with a shift kit but not enough to hurt your neck in town traffic. The whole operation of the transmission is great. Thank you again for taking the time to fix my car. Jim