First off, the 1-2 shift cannot overlap. 1st gear is the rear clutch, 2nd gear is the rear clutch and front band. The 1-2 shift simply applies the front band.
It can if you manually shift it. I know this for a fact because I had a 93 Dakota with a 518 that did it real bad after I installed a Turbo-action shift kit. I reasearched the problem and found my answer from Trans-go corp. The rear band servo on most torqueflites have 2 springs on it and they counteract each other when the band is releasing causing it to still be on for a little while after the front band is applied. I have no idea what Mopar was trying to accomplish when they designed it that way. The high performance torqueflites had one of the springs blocked and don't do it but the grocery getter and truck trans. have 2 springs. The Trans-go kits come with a spacer to replace one of the springs to eliminate that problem.
