KR and XLR gearbox ratios, late 1960’s:

4 sets of clutch gears, 3 sets of 1^st gear, 2 sets of 2^nd gears and 2 sets of 3^rd gears to give the following combinations.

The sets identified by a letter in the last column are the “preferred” factory sets

Page 4:

			Countershaft 3rd gear	37
			35709-54A
			23 teeth
			with
		Countershaft 2nd gear	Mainshaft 3rd gear
		35750-58	35305-56
		20 teeth	20 teeth
		with
		Mainshaft 2nd gear	Countershaft 3rd gear	38
		35296-56	35712-66R
		23 teeth	24 teeth
			with
	Countershaft 1st gear		Mainshaft 3rd gear
	35760-61R		35312-66R
	17 teeth		20 teeth
	with
	Mainshaft 1rd gear		Countershaft 3rd gear	39
	35277-61R		35709-54A	"P"
	26 teeth		23 teeth
			with
		Countershaft 2nd gear	Mainshaft 3rd gear
		35750-58R	35305-56
		22 teeth	20 teeth
		with
		Mainshaft 2nd gear	Countershaft 3rd gear	40
		35296-56R	35712-66R
		23 teeth	24 teeth
			with
			Mainshaft 3rd gear
			35312-66R
			20 teeth
			Countershaft 3rd gear	41
			35709-54A
			23 teeth
			with
		Countershaft 2nd gear	Mainshaft 3rd gear
		35750-58	35305-56
		20 teeth	20 teeth
		with
		Mainshaft 2nd gear	Countershaft 3rd gear	42
		35296-56	35712-66R
		23 teeth	24 teeth
			with
Clutch gear	Countershaft 1st gear		Mainshaft 3rd gear
37450-56R	35760-54RA		35312-66R
20 teeth	17 teeth		20 teeth
with	with
Countershaft gear	Mainshaft 1rd gear		Countershaft 3rd gear	43
35695-58R	35277-52A		35709-54A	"D"
25 teeth	27 teeth		23 teeth
			with
		Countershaft 2nd gear	Mainshaft 3rd gear
		35750-58R	35305-56
		22 teeth	20 teeth
		with
		Mainshaft 2nd gear	Countershaft 3rd gear	44
		35296-56R	35712-66R
		23 teeth	24 teeth
			with
			Mainshaft 3rd gear
			35312-66R
			20 teeth
			Countershaft 3rd gear	45
			35709-54A
			23 teeth
			with
		Countershaft 2nd gear	Mainshaft 3rd gear
		35750-58	35305-56
		20 teeth	20 teeth
		with
		Mainshaft 2nd gear	Countershaft 3rd gear	46
		35296-56	35712-66R
		23 teeth	24 teeth
			with
	Countershaft 1st gear		Mainshaft 3rd gear
	35760-54RA		35312-66R
	17 teeth		20 teeth
	with
	Mainshaft 1rd gear		Countershaft 3rd gear	47
	35277-54R		35709-54A	"Close STD"
	28 teeth		23 teeth
			with
		Countershaft 2nd gear	Mainshaft 3rd gear
		35750-58R	35305-56
		22 teeth	20 teeth
		with
		Mainshaft 2nd gear	Countershaft 3rd gear	48
		35296-56R	35712-66R	"N"
		23 teeth	24 teeth
			with
			Mainshaft 3rd gear
			35312-66R
			20 teeth

Patrick, Sept 2009