SM465 4 Speed Manual Transmissions

Having issues diagnosing problems with your SM465 GM 4 Speed manual transmission? we can help.

Below you will find a detailed parts list for the SM465 manual transmission that includes complete rebuilt transmissions, bearing rebuild kits with and without synchro rings, seals, small parts kits, bushings, individual bearings, hub slider, synchro rings, forks, gears and shafts. Also available are bearing retainers, shift components and small parts. If you need more information or cannot find the parts you need give us a call, if you would like to save money, ask about our good take out parts (GTO), they are inspected and guaranteed.

If you need more information or cannot find the parts you need give us a call toll free 888-824-2014, if you would like to save money, ask about our good take out parts (GTO), they are inspected and guaranteed.

We have a large inventory of rebuilt SM465 Manual Transmissions plus transmission parts. Our factory rebuilt re-manufactured transmissions are dyno tested before leaving the factory, ensuring the highest quality, We offer a no hassle 12 month warranty, performance guaranteed. The SM465 is a four speed, RWD or 4WD transmission. The SM465 is a Muncie engineering design, this transmission is a top loader, tower shifter with a non synchronized granny low 1st gear. 2nd through 4th gear uses brass syncro rings, bushings are used under all gears on the main shaft. 3rd and 4th gear are the only gears removable from the counter shaft. The SM465 was installed in both light and heavy duty applications, the case is cast iron with PTO covers on each side. This transmission has two different top covers, cast iron was used from 1968 to 1987, aluminum top covers were installed between 1988 and 1991. The SM465 was used by General Motors starting in 1967. We also offer upgrades for your SM465 including an upgrade for 3rd gear on main shaft and slider to prevent popping out of gear.

Free SM465 5 Manual Transmission Speed Parts Illustration

Below we provide a SM465 parts illustrations (2 pages) to assist you with the correct identification of the parts you need. Select the parts you require from the following list and give us a call. One of the most common problems is rough bearing failure noise coming from the front of the transmission clutch area. This is generally caused by pilot bearing failure that generally damages the input shaft.

To speak to a Drive Train Expert or to place an order call toll free 888-824-2012!

Need Stronger Parts?

Midwest Transmission can Cryogenic Treat any shaft or gear. This cryo treatment will add 30% in component strength. Call 888-824-2012 for a quote.

Application
Chevrolet Blazer, Suburban, Pickup Truck 1967-1991
General Motors GMC Jimmy, Pickup Truck 1967-1991
Chevrolet & GMC Van

Rebuilt Dyno Tested SM465 Transmissions 12 month warranty

Description Part Number
Transmission Rebuilt 68-91 4X2 MTGM010
Transmission Rebuilt 67-89 4X2 1.5 Input MTGM011
Transmission Rebuilt 72-84 4X4 10 Spline MTGM012
Transmission Rebuilt 81-92 4X4 32 Spline MTGM013

Rebuilt Overhaul Bearing Kits SM465 Transmission

Description Part Number
Bearing Rebuild Kit 68-ON TRUCK MWT-129
Bearing Rebuild Kit 68-ON W/Syncro BK129WS
Bearing Rebuild Kit 83-ON 5SPD, 525, 520 BK138WS
Bearing Rebuild Kit 87-ON Truck Aluminum BK129LWS
Bearing Rebuild Kit 87-Up Truck Aluminum Top TM211 Input Bearing MWT-129L

Gaskets & Seal Kits SM465 Transmission

Description Part Number
Gasket & Seal Kit K200105
Gasket Input Retainer 304-55R
Gasket Kit GS304-55
Seal Rear CR19970
Input Seal 100261

Small Parts & Bushings

Description Part Number Dwg #
Small Parts Kit SP304-50
Bushing 1ST Gear 84-Up WT304-19B 21
Bushing 84-Up 2ND Speed Gear WT304-19 20
Bushing Gear 84-Up 3RD WT304-19A 17

Bearings SM465 Transmission

Description Part Number Dwg #
Bearing Front Counter Shaft M1305GGT
Bearing Input 68-88 17 MM Wide N1211L 4
Bearing Input 90-Up 21 MM Wide .83″ thick TM211 4

Hubs & Sliders SM465 Transmission

Description Part Number Dwg #
Hub Syncro 3/4 WT304-2.5-R 22
Slider 1/2 (Reverse Gear on Shaft Main) WT304-36

Syncro Assemblies & Rings SM465 Transmission

Description Part Number
Syncro Key (Dog) 1/2 3/4 WT304-77
Syncro Ring 2ND 100761

Shift Forks and Rails SM465 Transmission

Description Part Number Dwg #
Fork 1/2 Cast Iron WT304-22 43A
Fork 3/4 Cast Iron WT304-22A 43
Fork Shift Aluminum 88-Up 3/4 WT304-23H

Gears SM465 Transmission

Description Part Number Dwg #
Gear 1ST 39T WT304-12-R 23A
Gear Shaft Main 2ND L35-36T WT304-21-R
Gear 3RD 26T WT304-11-R
Gear Kit 3RD WT304-11AX-R
Gear Reverse Idler 23T WT304-10 35

Input, Main & Counter Shafts SM465 Transmission

Description Part Number Dwg #
Shaft Input Large Pilot 10 SPL 10 11/16″ WT304-16 5
Shaft Input (Small) WT304-16A 5
Shaft Main 10SPL 4X4 AWT304-2C 21
Shaft Main 4X2 35SPL WT304-2A 21
Shaft Main 4X4 32SPL 19 5/8″ L WT304-2D 21

Bearing Retainer SM465 Transmission

Description Part Number Dwg #
Retainer Bearing 68-91 Small PILOT WT304-6 1

Shift Components SM465 Transmission

Description Part Number
Shift Stick 88-91 WT304-28A
Shift Stick Cast Iron Cover WT304-28

Small Parts SM465 Transmission

Description Part Number
Adapter GM NP205 Transfer Case Figure 8 Style GM6271549 ADP205/SM465
Coupler Output Sleeve 4 1/4 inch GM6259656
Nut 4X2 Shaft Main WT304-90
Nut 4X4 Shaft Main WT304-90A
Space Sleeve between Counter Shaft & 3/4 WT304-91

If you need more information or cannot find the parts you need give us a call toll free 888-824-2014, if you would like to save money, ask about our good take out parts (GTO), these parts are identified with a number ending in “U” they are inspected and guaranteed.

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