The adjustment of 2-3 shift rod could be the problem. Loosen the upper clamp on the 2-3 rod and set both of the shift
levers on the side cover to the neutral position. Remove the grease cap on the shifter box and make sure the levers are
centered in the shift box. When the shift box is centered in the neutral position, tighten the clamp and try it.
More adjustment may be required. Be aware that every one of the contact points on that linkage is a possible wear point
and can cause slop in the shifting operation.
Fred


1956 3100 Pickup/Red/350/3sp OD/PS/Disc Brakes
1957 Bel Air Sport Coupe/Red/355/TH350/PS/Disc Brakes
2017 Silverado LT Single Cab SB/Black/5.3/6 Speed Trans
1947 Willys CJ2A w/F-Head engine