Performance transmissions Search this website HomePerformance transmissions PERF PRO Price Core Type 1 Swing or IRS Super Diff Aluminum Side Cover Welded Third & Fourth Gear Hubs Hardened Keys Steel Forks 437 or 412 R&P 1100.00 500.00 388 R&P + $200.00 1399.00 500.00 PRO COMP Type 1 Swing or IRS Sup...