Sm465



Sm465
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Main >> Transmission >> Identification >> GM >> SM465

The SM465 is a heavy duty, granny, 4 speed transmission used in Chevy and GM trucks. The large ribbed cast iron case makes it easy to identify.

It is an excellent 4 speed to swap into a Jeep with a Chevy engine. The SM465 has an unusual large input bearing retainer, it does not use the standard GM size. It is normally best to buy a matching bell housing with the transmission.

Rumor is, the late 70s to 81 GMC trucks were available with a Oldsmobile 5.7L diesel and SM465. The bell housing used in this truck would be useful to mate an SM465 with a Buick engine since this engine should have the BOP/BOC pattern. The other option to mate a Buick or Caddy engine to an SM465 is get a BOP/BOC bell housing machined out. This adds to the cost and who knows if it would compromise the strength of the bell housing.

Transmission 1st 2nd 3rd 4th 5th Rev
SM465 6.55 3.58 1.57 1.00 NA


SM465 back view


SM465 side view


SM465 front view


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Sm465Sm465 od

Replaces the AX15, NV3500, NV3550, and NV4500 5-Speeds and the NP435A, NP435L, NP435D, NP435E, T18, T19, and SM465 4-Speeds. Silver Sport Transmission Partner Companies To help us engineer and source components for our TREMEC TR-4050 5-Speed and A41X 4-Speed Automatic, we partnered with several companies. GM 4, 5 & 6 – Speed Manual Transmissions GM 4-Speed Manual Transmission Trucks The Muncie 465 is a great transmission from a durability standpoint, but it is the widest ratio 4-speed of the Big Three. It has a granny low and so then just 3 normally usable ratios. See Final Drive Ratios and notice Continue reading GM Truck Manual →.

Sm465Sm465

Sm465 Gear Ratios

Caddy engine to an SM465 is get a BOP/BOC bell housing machined out. This adds to the cost and who knows if it would compromise the strength of the bell housing. SM465 back view. DIAGRAM # MAN-TRANS part# DESCRIPTION 2 SM465-2 MAINSHAFT,4WD,10 SPLINE 2 SM465-2A MAINSHAFT,4WD,32 SPLINE 2 SM465-2B MAINSHAFT,2WD,35 SPLINE 2.5 SM465-2.5 SYNCHRO ASSEMBLY,3-4 3 SM465-3 CLUSTER,1.3″ I.D. FRONT CLUSTER BEARING 3 SM465-3A. Drivetrain catalog offering discounted SM465 transmission parts, complete repair kits, major components and troubleshooting to help, free drawing asisting you in parts identification.