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I am getting familiar with my F250, and would like to know if I can adjust the C6 tranny. If I stay out of the throttle, it will shift from 1st to 2nd fine, but if I give it some serious gas it will not shift into 2nd until I let off of the gas and then get back on.
Yes you can adjust the Band, Its the stud sticking out of the drivers side with the lock nut. You need to get a new lock nut before you do this as it has a seal made to it. Id haave to look up the procedure though
Factory service manual says "Remove and discard locknut. Adjust screw to 10 ft-lbs torque, then back off 1 1/2 turns, install new locknut and tighten lock nut to 35-40 ft-lbs."
Mine did that and I replaced the vacuum modulator and problem disappeared. Make sure that it's getting vacuum to it and maybe replace it. One thing is that there is a small pin that is magnetic and "normally" comes out with the modulator. If not you have to get a magnet and remove it before putting in the new one. It will fit into the hole of the modulator then put the modulator back in.
my 68 f-100 has a c-6 with a mild shift kit of un known origin. one book i read described the above procedure, yet some old shift kit instrucktions i have say to turn it out 1 and i saw some where else say something different.........which should i use, and why the discrepency with adjustments? what would be considered too tight under any circumstances??
That band adjustment is just for the 2nd gear I believe anyway, but I think I used 1 turn because it was easier to gauge while laying on my back under the truck.
Could someone please explain to me what the Modulator Valve does, and hard difficult is it to change. I can't seem to find a reference for it in the manual.
it modulates stuff. actually, it controls shift points, runs by vacuum and check first if the line from the valve to the back of the engine is intact and doesnt leak.
if not, then simply unbolt the old valve and slam in the new one
I think that the manual says it is to be adjusted using INCH-pounds of torque (not FOOT pounds).
I just checked the manual I have which is a Factory service manual printed in September of 1975. It says 10 ft-lbs just like I wrote above. What manual says to use inch-pounds?
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