Hydraulic Throw out Bearing - Bolt On MC1302Hydraulic Throw out Bearing Bolt OnSuit GM Borg Warner T 5 & T 6 (Non OEM) with 1"x14 & 1 1 8"x26 Spline MC1302 1302 Bolt on hydraulic throw out bearings are used with bellhousings less than 6. 5" deep or where the measurement from the outside rear of the bell housing to the clutch fingers is less than 3". Bellhousings deeper than 6. 5" should use the slip on style bearing.