Bruce/Greg your thoughts... please.....

Under normal circumstances, the MTV upshift valve w/ spring should react at about 10 psi of TV pressure. That occurs at a relatively light throttle. I couldn't see removing the spring having much affect on his WOT 1-2 shift problem.

However, if his MTV upshift valve was sticking and not moving at all, that would be of concern. Since removing the spring won't hurt a thing, it still wouldn't be a bad idea for 68Camaro to pull down the VB to do so and make sure the valve is free while he's at it.
 
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