I had this problem on my Challenger and it was a worn reverse shift lever. The hole was a little wallowed out on the inside of the lever where it bolts to the transmission not the rod end.
It would not turn the lever far enough to engage the switch.
Worth a look. Appreciate the comment but as mentioned earlier, the lever is up against the case inside the trans. It can't go back any further. I've ordered a new switch hoping it reaches in a hair deeper. I couldn't immediately find a NOS switch so I ordered a "Standard" brand. Hopefully its not made in China.
1970 Superbird 440 Six BBL, 4-Speed, Dana, FJ5
1969 Daytona Charger 440 4-Speed, Dana, EV2
1971 340 Challenger Conv. Flemington Speedway Pace Car, FC7
1970 340 Six Pack Callenger T/A 4-speed T8 Tan
1971 340 Challenger RT Formal Roof, EV2 w/ V2 Stripe & Orange Houndstooth
1969 Talladega Torino, 428CJ
1969 Gurney Special Cyclone Spoiler II, 351 Cleveland
"Id rather have a bottle in front of me than a frontal lobotomy" Ben Franklin 1755
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