Question about 904 tranny kickdown band adjustment

zookgumby said

Thanks, yes the KD lever has spring loading and returns to about center. This was verified when I installed the Bouchillon kit. The kit also provided a small spring to hold the lever in a forward position at a low throttle position. The rear-end ratio appears to be stock. As I noted earlier, there is no noticeable slippage - when I first got the car, the old mechanical linkage (wouldn't work with higher manifold) was disconnected and I did notice slippage from second to third one time, that's why I went to trying cable systems which finally resulted in the Bouchillon kit with it's different lever design.

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Go back to the factory linkage. When you say "wouldn't work with higher manifold", I'll assume that means that you converted to a 4bbl. from a 2bbl. A 4bbl. locates the throttle linkage further forward compared to a 2bbl., so you need to lengthen the kickdown rod a bit (about 1 1/2" IIRC). The 4bbl. is also wider than a 2bbl., so the rod also has to be modified where it attaches to the bellcrank at the rear of the engine in order to maintain correct alignment. Make sure you attach the linkage to the carburetor in exactly the same location as it was on the 2bbl. lever so you maintain the correct ratio of lever movement- it is quite different than later kickdown linkages.