If it is the cluster, you are looking at $250 for a new one, and you should replace the imput shaft since it rides on top of the cluster another $100, and the master rebuild kit runs around $150. That is what went out on mine, except my imput shaft only had 3 teeth left and the bottom cluster gear that meshed with it didn't even look like a gear anymore..I'll see if I cna take some pic's and post them.
Good Luck
------------------
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