To Determine Gear RPM Change:
(RPM ÷ Gear Ratio) * New Ratio = New RPM
Example: (8000 ÷ 6.58) * 6.33 = 7696
To Determine Final Drive:
((# Teeth Top Gear) ÷ (# Teeth Bottom Gear)) * R&P Ratio = Final Drive
GEAR CHART FOR 6 SPLINE
 
FOR WINTER GEARS

P/N 4400 Series (1" Wide)
P/N 4500 Series (1 3/8" Wide)

Winters' 6 Spline QC Gears
Machined from SAE 8620 Steel.
When ordering 1" wide gears,
add prefix "44" to set number.
When ordering 1 3/8" wide gears,
add prefix "45" to set number.
Example: 4401 or 4501

 
 
3.78 R&P Ratio
(9-34 Teeth)
4.11 R&P Ratio
(9-37 Teeth)
4.33 R&P Ratio
(9-39 Teeth)
4.88 R&P Ratio
(8-39 Teeth)
5.13 R&P Ratio
(8-41 Teeth)
5.38 R&P Ratio
(8-43 Teeth)
Gear Set #
Low Spur Gear
High Spur Gear
No. of Teeth
Low/High
Low/High
Low/High
Low/High
Low/High
Low/High
1
2
3
3B
3A
4
5
5A
6
24
25
7
23
8
22
9
10
11
12
13
14
15
16
17
18
18A
19
20
27
21
28
29
26
30
31
32
1.00
0.96
0.92
0.89
0.88
0.85
0.81
0.79
0.78
0.77
0.75
0.74
0.73
0.71
0.70
0.69
0.68
0.67
0.66
0.65
0.64
0.63
0.62
0.60
0.69
0.57
0.56
0.55
0.54
0.53
0.53
0.52
0.51
0.50
0.49
0.48
1.00
1.04
1.09
1.12
1.14
1.18
1.24
1.26
1.29
1.30
1.33
1.35
1.38
1.40
1.42
1.44
1.47
1.50
1.53
1.54
1.57
1.60
1.63
1.67
1.69
1.75
1.79
1.80
1.85
1.88
1.90
1.92
1.93
2.00
2.05
2.11
24/24
23/24
23/25
17/19
22/25
22/26
21/26
19/24
21/27
23/30
18/24
20/27
16/22
20/28
19/27
16/23
15/22
18/27
19/29
15/23
14/22
15/24
16/26
18/30
13/22
16/28
14/25
15/27
13/24
17/32
19/36
12/23
15/29
20/40
20/41
19/40
3.78 / 3.78
3.62 / 3.94
3.48 / 4.11
3.38 / 4.22
3.33 / 4.30
3.19 / 4.46
3.05 / 4.68
2.99 / 4.77
2.94 / 4.86
2.90 / 4.93
2.84 / 5.04
2.80 / 5.10
2.75 / 5.20
2.70 / 5.29
2.66 / 5.37
2.63 / 5.43
2.57 / 5.54
2.52 / 5.67
2.47 / 5.77
2.46 / 5.80
2.41 / 5.94
2.36 / 6.05
2.32 / 6.14
2.27 / 6.30
2.23 / 6.40
2.16 / 6.62
2.11 / 6.75
2.10 / 6.80
2.05 / 6.98
2.01 / 7.12
2.00 / 7.16
1.97 / 7.25
1.96 / 7.31
1.89 / 7.56
1.84 / 7.75
1.80 / 7.95
4.11 / 4.11
3.95 / 4.27
3.78 / 4.48
3.66 / 4.60
3.62 / 4.69
3.49 / 4.85
3.33 / 5.10
3.25 / 5.18
3.21 / 5.30
3.16 / 5.34
3.08 / 5.47
3.04 / 5.55
3.00 / 5.67
2.92 / 5.75
2.88 / 5.84
2.84 / 5.92
2.79 / 6.04
2.75 / 6.17
2.71 / 6.29
2.67 / 6.33
2.63 / 6.45
2.59 / 6.58
2.55 / 6.70
2.47 / 6.86
2.42 / 6.95
2.34 / 7.19
2.30 / 7.36
2.26 / 7.40
2.22 / 7.60
2.18 / 7.73
2.17 / 7.81
2.14 / 7.89
2.10 / 7.93
2.06 / 8.22
2.01 / 8.43
1.97 / 8.67
4.33 / 4.33
4.15 / 4.52
3.99 / 4.71
3.88 / 4.84
3.81 / 4.92
3.67 / 5.12
3.50 / 5.37
3.43 / 5.47
3.37 / 5.57
3.32 / 5.65
3.25 / 5.78
3.21 / 5.85
3.15 / 5.96
3.10 / 6.07
3.05 / 6.16
3.01 / 6.23
2.95 / 6.35
2.89 / 6.50
2.84 / 6.61
2.83 / 6.64
2.76 / 6.81
2.71 / 6.93
2.67 / 7.04
2.60 / 7.22
2.56 / 7.33
2.48 / 7.58
2.43 / 7.74
2.41 / 7.80
2.35 / 8.00
2.30 / 8.16
2.29 / 8.21
2.26 / 8.31
2.24 / 8.38
2.17 / 8.66
2.11 / 8.88
2.06 / 9.12
4.88 / 4.88
4.67 / 5.09
4.49 / 5.30
4.36 / 5.45
4.29 / 5.54
4.13 / 5.76
3.94 / 6.04
3.86 / 6.16
3.79 / 6.27
3.74 / 6.36
3.66 / 6.50
3.61 / 6.58
3.55 / 6.70
3.48 / 6.83
3.43 / 6.92
3.39 / 7.01
3.32 / 7.15
3.25 / 7.31
3.19 / 7.44
3.18 / 7.48
3.10 / 7.66
3.05 / 7.80
3.00 / 7.92
2.93 / 8.13
2.88 / 8.25
2.79 / 8.53
2.73 / 8.71
2.71 / 8.78
2.64 / 9.00
2.59 / 9.18
2.57 / 9.24
2.54 / 9.34
2.52 / 9.43
2.44 / 9.75
2.38 / 9.99
2.32 / 10.26
5.13 / 5.13
4.91 / 5.35
4.72 / 5.57
4.59 / 5.73
4.51 / 5.82
4.34 / 6.06
4.14 / 6.35
4.06 / 6.47
3.99 / 6.59
3.93 / 6.68
3.84 / 6.83
3.80 / 6.92
3.73 / 7.05
3.66 / 7.18
3.61 / 7.28
3.57 / 7.37
3.49 / 7.52
3.42 / 7.69
3.36 / 7.82
3.34 / 7.86
3.26 / 8.05
3.20 / 8.20
3.15 / 8.33
3.08 / 8.54
3.03 / 8.67
2.93 / 8.97
2.87 / 9.15
2.85 / 9.23
2.78 / 9.46
2.72 / 9.65
2.70 / 9.71
2.67 / 9.82
2.65 / 9.91
2.56 / 10.25
2.50 / 10.51
2.43 / 10.79
5.38 / 5.38
5.15 / 5.61
4.95 / 5.84
4.81 / 6.01
4.73 / 6.11
4.55 / 6.35
4.34 / 6.65
4.26 / 6.79
4.18 / 6.91
4.12 / 7.01
4.03 / 7.17
3.98 / 7.26
3.91 / 7.39
3.84 / 7.53
3.78 / 7.64
3.74 / 7.73
3.66 / 7.88
3.58 / 8.06
3.52 / 8.20
3.51 / 8.24
3.42 / 8.45
3.36 / 8.60
3.31 / 8.73
3.23 / 8.96
3.18 / 9.10
3.07 / 9.41
3.01 / 9.60
2.99 / 9.68
2.91 / 9.92
2.86 / 10.12
2.84 / 10.18
2.80 / 10.30
2.78 / 10.39
2.69 / 10.75
2.62 / 11.02
2.55 / 11.32

A full-sized poster version of this chart is available, P/N Poster-6