911/911 transmission with no reverse

[zman911]

Please help.....I have a 1971 911T with the 911 transmission and I cant hit reverse. I put new coupler, ball cup, short shift kit, and clutch cable. I have adjusted the coupler in and out, left and right, at least 25-50 times like recommened in other posts here and still no luck. I can hit 1-4 great.....sometimes when 1-4 feels perfect and I try reverse the tack will lower very slightly when the clutch is released. Oh.....I did remove the tranny and put on new gaskets but made no adjustmests.

Thanks so much in advance.