In adjusting the intermediate band on my c6 transmission, I found the locknut to be stuck. Can I remove the adjuster completely to get the locknut off without causing any problems?

 

No, don't do it!

The adjuster has a smooth tip on it that fits into a recess on the big end of a wedge. The small end of the wedge fits against the steel end fitting on the band. At the other end of the band is a similar setup, but instead of an adjuster there, the big end of the wedge fits onto a hinged part. And the hinged part gets pushed out by the intermediate servo piston when it is applied. Think of the whole thing as an externally contracting brake. That is exactly what it does.

If you loosen the adjuster too far, one wedge or both will fall away. And you will then have to drop the pan, and remove the valve body to hook it all up again. Worse might be if one of the parts ended up getting cocked to a side, and later breaking something. I think if a wedge came free and jammed itself between the drum and the case while in operation, case breakage would occur.

The adjuster is used to set the preload on the band. The servo movement does the rest to engage/disengage it. Unless you have reason to believe the preload is wrong, I don't think I'd fool with it. But if you do, don't back it off more than a few turns.

 

Thanks for the info. Torky2. I was able to get it loose and adjusted, torqued to 10ftlb and backed off 1-3/4 turns.
The reason I'm adjusting is that my transmission is shifting normal into 2nd, quickly through 2nd into 3rd. Shifting manually seems fine.
Before messing with this I replaced the vacuum modulator. Niether has made a difference. Any ideas?