K Factor |
Approx. Stall Speed
|
Marking |
142 |
2024 RPM |
A |
140 |
1996 RPM |
B |
135 |
1925 RPM |
C |
130 |
1853 RPM |
D |
115 |
1639 RPM |
E |
110 |
1568 RPM |
F |
100 |
1425 RPM |
G |
97 |
1383 RPM |
H |
89 |
1269 RPM |
J |
85 |
1211 RPM |
K |
If you look at the tag that is usually on the bottom of the torque converter, there is a code with 2 letters, 1 number, 1 letter. The first letter is the application, 200-4R's use a C, the second letter is the "K" factor, the number is the clutch type, capacity & travel in degrees, and the fourth digit (optional) refers to the cover style, number of mounting lugs and method of welding the lugs.
Cover Style: optional code
4th digit: A = Open cover (no converter clutch) 3 lugs with one weld per lug. (gas)
B = Open cover (no converter clutch) 3 lugs with three welds per lug. (diesel)
C = Converter clutch type, 3 lugs with one weld per lug. (gas)
D = Converter clutch type, 3 lugs with 180 degree weld on each lug. (diesel)
E = Converter clutch type, 6 lugs with 180 degree weld on each lug. (diesel)
F = Converter clutch type, 3 lugs, 245 mm style lug.
For the 298 mm torque converters 4-digit code tag...explaned as follows.
1st digit= application
2nd digit= "K" factor (K x 14.2574)
3rd digit= clutch type
4th digit= cover type
APPLICATION:
B = 250 and 350 transmission,
C = 200/200-4R, 325-4L & pre 85 700-R4
D = 85 and later 700-R4 with 30 spline input
"K" FACTOR: A= 142 = 2024 rpm
B = 140 = 1996 rpm
C = 135 = 1925 rpm
D = 130 = 1853 rpm
E = 115 = 1639 rpm
F = 110 = 1568 rpm
G = 100 = 1425 rpm
H = 97 = 1383 rpm
J = 89 = 1269 rpm
K = 85 = 1211 rpm
CLUTCH TYPE: 0 = no clutch
1 = 300 ft/lb 43 degrees travel
2 = 240 ft/lb 46 degrees travel
3 = 290 ft/lb 44 degrees travel *
4 = 160 ft/lb 37 degrees travel
5 = 220 ft/lb 35 degrees travel
6 = 195 ft/lb 42 degrees travel
7 = 195 ft/lb 30 degrees travel *
8 = 300 ft/lb 44 degrees travel
9 = 290 ft/lb 44 degrees travel #
A = 300 ft/lb 29 degrees travel
B = 300 ft/lb 44 degrees travel
C = 330 ft/lb 28 degrees travel
* poppet valve
# static open poppet valve which is normally open and closes during acceleration.
COVER STYLE:
A = Open cover (no converter clutch) 3 lugs with one weld per lug (gas)
B = Open cover (no converter clutch) 3 lugs with three welds per lug (diesel)
C = Converter clutch type, 3 lugs with one weld per lug (gas)
D = Converter clutch type, 3 lugs with 180 degree weld on each lug (diesel)
E = Converter clutch type, 6 lugs with 180 degree weld on each lug (diesel)
F = Converter clutch type, 3 lugs, 245 mm style lug.
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