Originally Posted by
Thomas C Potter
the shop told me I could adjust the servo 3/4 of a trun max to soften the shift.
Hmm... Were they talking about adjusting the vacuum modulator? Or backing out the intermediate
servo band adjustment bolt?
If you want it to shift earlier and softer overall at part throttle, that would be the modulator. But this
won't affect WOT shifts. If you're looking for less whack from 2nd gear, particularly at about 2/3 throttle
or more, backing out the band adjustment a bit might help. I would take small steps though, say 1/4 turn
at a go, and definitely don't exceed 3/4 turn overall from where you are now.
The intermediate band adjustment is the sqare-headed bolt with locknut that's on the driver's side, just
above the manual linkage. C6 has only one band. The locknut has a molded seal on it, and it's usually
recommended to replace the locknut whenever you adjust the band. Most often I'll reuse the nut unless
the seal is mangled, but be aware if you reuse it, it might leak.
The normal procedure for intermediate band adjustment on a stock C6 is to torque the adjuster screw to
120 in/lb, then back out exactly 1 turn. But you'll find, depending on the builder and the application, this
can range from 3/4 turn to 1 1/2 turn. It'd be nice to know what your transmission builder recommends to
begin with, in case you need to start over, and also for doing periodic band adjustments.
Cheers,
Jeff Cook
'03 Marauder 300B, Dark Blue Pearl, Dark Charcoal/Flint interior, Badgeless front and rear, 4.10s and Lidio Tune