Yes, at least for some of the other trannies from GM... Keeps the
engine from excessively braking the vehicle (an economy trick,
actually)

On Thu, 20 Jan 2005 19:08:35 -0500, Bret Chase >
wrote:

>'88 K2500, 700-r4. Is it normal for the tcc to disengage at zero
>throttle? my truck does it and it drives me nuts esp. if I am
>following someone, the TCC unlocks when I let off the gas and locks
>back up when I press on the gas. it's done this for at least as long
>as this trans has been in the truck (2 years now, I think) but it's
>really really starting to annoy the hell out of me.
>
>TIA,
>Bret