Saturday, February 4, 2012
1987-1991 Light Truck Bronco F-150-350 Series Service Manual
The wide ratio version is available for all F Series vehicles over 8500 lbs GVW all engines 6007 except F Super Duty Commercial Stripped Chassis equipped with a diesel engine The close ratio version is available only in F Series vehicles with a 7 3L diesel engine and a GVW over 8500 lbs.
The ratios are as follow 1st 4 14 5 72 2nd 2 37 2 94 3rd 1 42 1 61 4th 1 0 1 0 5th 0 77 0 76 Reverse 3 79 5 24 Close Ratio Diesel Wide Ratio Gasoline Diesel The transmission features an aluminum case 7005 with an integral clutch housing Because of the aluminum case the tapered roller bearings of the transmission shafts must be fitted under preload This is because heat expansion of the aluminum case is greater than that of the steel alloy mainshaft and countershaft cluster gear 7113 If the bearings were not pre loaded this would result in excessive end play when the case in warm loaded operating conditions The transmission also features shrink fit gears on the countershaft cluster gear Shrink fit gears are connected to the countershaft cluster gear by friction only rather than connected trough splines The gear is heated and lightly pressed onto the countershaft cluster gear The subsequent cooling of the gear provides the shrink fitting The countershaft cluster gear is serviced as an assembly 07 03B 1 1994 Econoline F 150 F 250 F 350 Bronco F Super Duty Powertrain Drivertrain Aug 1993 TRANSMISSION ZF S5 42 TROUBLESHOOTING GUIDE SERVICE TIPS ZF Industries DIAGNOSIS AND TESTING Inspection and Verification.
