Reverse doesn't have a syncro in the T-5 
Reverse is famous for being a PIA at time sin the T-5 try sticking it in another gear as suggested then try Reverse. Or try letting the clutch out a little while trying to put it in reverse.
To do a proper rebuild, with all new internals it will cost around $550 in parts, I just did this new imput shaft, cluster, 2nd and 3rd, and the complete rebuild kit with bearings and syncros. Contact Don Walsh Jr at D&D or Bob Hanlon both rebuild T-5's and sell new ones and parts. I have delt with both for parts and they are a great bunch of guys...
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Check Out My Site 91GT,Holley SysteMAX II Kit-Heads 2.02" x 1.60" port matched to a 1262,Anderson N-61,24#,76mm C&L,Full MAC exhaust 1-5/8" Long tubes,2-1/2" O.R H-Pipe,2 1/2" cat back, No A/C or PS or emissions, 12" K&N Filter,RNH PERFORMANCE Ram Air,Ron Davis Radiator,Full Suspension,S&W 8pt "X" brace,JAZ seats,3:73's,Welds..etc,4:30's and 31 splines coming very soon!
FIRST TIME OUT 12.16@111 WHEELS-UP
[This message has been edited by Rick 91GT (edited 07-10-2001).]
[This message has been edited by Rick 91GT (edited 07-10-2001).]