5th/6th Gear: Notes

Inspect the 5th and 6th gear synchronizer cones, gear teeth and rings for wear or damage. Replace as necessary.

Using a feeler gauge, while applying pressure and rotating the synchronizer ring, measure the clearance between the 5th gear synchronizer ring and the flank surface of the gear. The measurement should be the same around the entire circumference. Replace the synchronizer ring if less than the minimum specification.

NOTE: Set the synchronizer ring squarely on the gear and measure around the circumference.

5TH GEAR SYNCHRONIZER RING CLEARANCE SPECIFICATION TABLE

Standard	Minimum
1.50 mm (0.059 in)	0.80 mm (0.031 in)

Fig 1: Measuring Clearance Between 5th Gear Synchronizer Ring & Flank Surface Of Gear

Courtesy of FORD MOTOR CO.

Using a feeler gauge, while applying pressure and rotating the synchronizer ring, measure the clearance between the 6th gear synchronizer ring and the flank surface of the gear. The measurement should be the same around the entire circumference. Replace the synchronizer ring if less than the minimum specification.

NOTE: Set the synchronizer ring squarely on the gear and measure around the circumference.

6TH GEAR SYNCHRONIZER RING CLEARANCE SPECIFICATION TABLE

Standard	Minimum
1.50 mm (0.059 in)	0.80 mm (0.031 in)

Fig 2: Measuring Clearance Between 6th Gear Synchronizer Ring & Flank Surface Of Gear

Courtesy of FORD MOTOR CO.

Measure the clearance between the clutch hub sleeve and the shift fork. Replace if it exceeds the maximum specification.

Inspect the clutch hub sleeve and clutch hub operation. Replace if there is a malfunction.

5TH/6TH GEAR CLUTCH HUB SLEEVE AND SHIFT FORK CLEARANCE SPECIFICATION TABLE

Standard	Maximum
0.10-0.36 mm (0.004-0.014 in)	0.86 mm (0.033 in)

Fig 3: Measuring Clearance Between Clutch Hub Sleeve & Shift Fork

Courtesy of FORD MOTOR CO.

Using a telescoping gauge, measure the ID of the 5th gear. Using a micrometer, measure the OD of the gear sleeve.

Fig 4: Measuring OD
Courtesy of FORD MOTOR CO.
Measure the telescoping gauge to determine if the gear to the gear sleeve clearances are within specifications. If not within specifications, replace as needed.

Fig 5: Measuring Telescoping Gauge With Micrometer
Courtesy of FORD MOTOR CO.
Using a telescoping gauge, measure the ID of the 6th gear. Using a micrometer, measure the OD of the gear sleeve.

Fig 6: Measuring ID Of 6th Gear
Courtesy of FORD MOTOR CO.
Measure the telescoping gauge to determine if the gear to the gear sleeve clearances are within specifications. If not within specifications, replace as needed.