These quality SM420 manual transmission parts, rebuild kits and overhaul kits are designed to be top of the line overhaul kits. We have include information on how to identify individual transmissions, application information, model year, detailed kit and part availability by transmission type. Borg Warner transmissions are covered in this section SM420's, rear wheel drive (RWD), requiring 4 speed applications.
These quality SM420 manual transmission parts, rebuild kits and overhaul kits are designed to be top of the line overhaul kits. We have include information on how to identify individual transmissions, application information, model year, detailed kit and part availablity by transmission type. Borg Warner transmissions are covered in this section SM420's, rear wheel drive (RWD), This transmission was used by General Motors in Chevrolet and GMC Pickup trucks from 1954 to 1967 requiring 4 speed applications.
Different overhaul kits are available depending on the extent of the overhaul that you plan, the contents of the kits are described as follows:
IDENTIFICATION - SM420 4spd, RWD or 4WD Top loaded, tower shift "granny-low" transmission found in light and heavy duty applications. Cast iron case with cast iron top cover. Non-synchronized 1st, but has only brass type synchro rings for 3rd/4th. All gears on the countershaft are removeable except for 1st. Early units have threads on the input shaft and do not have a front seal. The case has one P.T.O opening.
It's easy to get the correct parts the first time from drivetrain.com. Using the application tables below just locate your vehicle model, model year, number of cylinders and engine size read across to identify correct overhaul kit part number. Make a note of the part number and complete our secure easy order form.
Below you will find parts for the SM420 4 speed transmission used in
Chevrolet and
GMC. In addition to these overhaul kits we can provide miscellaneous
hardparts, don't see what you need just give us a call.
CHEVROLET |
|
Model |
Cyl. |
Engine |
Year |
Description |
Overhaul Kit |
|
PICKUP and VAN |
6cyl |
261 ci |
1954-61 |
Iron case and iron top cover |
DTSBK108 |
|
PICKUP and VAN |
8cyl |
288ci |
1955-59 |
Iron case and iron top cover |
DTSBK108 |
|
PICKUP and VAN |
8cyl |
316ci |
1955-59 |
Iron case and iron top cover |
DTSBK108 |
|
PICKUP and VAN |
8cyl |
336ci |
1955-59 |
Iron case and iron top cover |
DTSBK108 |
|
PICKUP and VAN |
8cyl |
347ci |
1955-59 |
Iron case and iron top cover |
DTSBK108 |
|
PICKUP and VAN |
6cyl |
305ci |
1960-67 |
Iron case, iron top cover - case has one PTO cover |
DTSBK108 |
|
PICKUP and VAN |
6cyl |
351 ci |
1960-67 |
Iron case, iron top cover - case has one PTO cover |
DTSBK108 |
|
PICKUP and VAN |
6cyl |
194ci |
1963-67 |
Iron case, iron top cover - case has one PTO cover |
DTSBK108 |
|
PICKUP and VAN |
6cyl |
230ci |
1963-67 |
Iron case, iron top cover - case has one PTO cover |
DTSBK108 |
|
PICKUP and VAN |
6cyl |
250ci |
1963-67 |
Iron case, iron top cover - case has one PTO cover |
DTSBK108 |
|
PICKUP and VAN |
8cyl |
283ci |
1963-67 |
Iron case, iron top cover |
DTSBK108 |
|
STEPVAN (Forward Control) |
6cyl |
194ci |
1965-67 |
Iron case, iron top cover - case has one PTO cover |
DTSBK108 |
|
STEPVAN (Forward Control) |
6cyl |
230ci |
1965-67 |
Iron case, iron top cover - case has one PTO cover |
DTSBK108 |
|
STEPVAN (Forward Control) |
6cyl |
292ci |
1965-67 |
Iron case, iron top cover - case has one PTO cover |
DTSBK108 |
|
STEPVAN (Forward Control) |
8 cyl |
283ci |
1965-67 |
Iron case, iron top cover - case has one PTO cover |
DTSBK108 |
|
STEPVAN (Forward Control) |
8 cyl |
350ci |
1967 |
Iron case, iron top cover - case has one PTO cover |
DTSBK108 |
GMC |
|
|
PICKUP and VAN FULL SIZE |
6cyl |
261 ci |
1954-61 |
Iron case, iron top cover |
DTSBK108 |
|
PICKUP and VAN FULL SIZE |
6cyl |
235ci |
1954-62 |
Iron case, iron top cover |
DTSBK108 |
|
PICKUP and VAN FULL SIZE |
8cyl |
288ci |
1955-59 |
Iron case, iron top cover - case has one PTO cover |
DTSBK108 |
|
PICKUP and VAN FULL SIZE |
8cyl |
316ci |
1955-59 |
Iron case, iron top cover |
DTSBK108 |
|
PICKUP and VAN FULL SIZE |
8cyl |
336ci |
1955-59 |
Iron case, iron top cover |
DTSBK108 |
|
PICKUP and VAN FULL SIZE |
8cyl |
347ci |
1955-59 |
Iron case, iron top cover |
DTSBK108 |
|
PICKUP and VAN FULL SIZE |
6cyl |
305ci |
1960-67 |
Iron case, iron top cover |
DTSBK108 |
|
PICKUP and VAN FULL SIZE |
6cyl |
351 ci |
1960-67 |
Iron case, iron top cover - case has one PTO cover |
DTSBK108 |
|
PICKUP and VAN FULL SIZE |
6 cyl |
194ci |
1963-67 |
Iron case, iron top cover - case has one PTO cover |
DTSBK108 |
|
PICKUP and VAN FULL SIZE |
6 cyl |
230ci |
1963-67 |
Iron case, iron top cover - case has one PTO cover |
DTSBK108 |
|
PICKUP and VAN FULL SIZE |
6cyl |
250ci |
1963-67 |
Iron case, iron top cover - case has one PTO cover |
DTSBK108 |
|
PICKUP and VAN FULL SIZE |
8cyl |
283ci |
1963-67 |
Iron case, iron top cover |
DTSBK108 |
|
STEPVAN (Forward Control) |
6 cyl |
194ci |
1965-67 |
Iron case, iron top cover - case has one PTO cover |
DTSBK108 |
|
STEPVAN (Forward Control) |
6 cyl |
230ci |
1965-67 |
Iron case, iron top cover - case has one PTO cover |
DTSBK108 |
|
STEPVAN (Forward Control) |
6 cyl |
250ci |
1965-67 |
Iron case, iron top cover - case has one PTO cover |
DTSBK108 |
|
STEPVAN (Forward Control) |
6 cyl |
292ci |
1965-67 |
Iron case, iron top cover - case has one PTO cover |
DTSBK108 |
|
STEPVAN (Forward Control) |
8 cyl |
283ci |
1965-67 |
Iron case, iron top cover - case has one PTO cover |
DTSBK108 |
|
STEPVAN (Forward Control) |
8 cyl |
350ci |
1967 |
Iron case, iron top cover - case has one PTO cover |
DTSBK108 |
Part Number
|
Description
|
Type
|
Years
|
Syyncro Ring Kit |
ASK135 |
Sychro Ring Kit |
For Units with front seal |
1959-67
|
Miscellaneous Kit |
301419 |
Small Parts Kit |
|
1948-67
|
DLG-SM420G+K |
Gasket and Seal Kit |
|
1948-67
|
Bearing Retainer |
ALT3761932 |
Front Bearing Retainer (Casting # 3761932) |
with 9 1/4" Maindrive |
1959-67
|