Sm465 Transmission


Are you looking for the SM465 standard transfer kits and parts for sale? Shop them all today at Cobra Transmission, your online parts store. Unlike the SM420, the SM465 uses a much larger 5.120-inch retainer bore, so you can't just bolt a factory or aftermarket Buick bellhousing behind your Caddy engine, plunk an SM465 on, and be on. SM465 TRANSMISSION 1-2 SYNCHRO ASSEMBLY WITH 2ND RING, HUB, 1ST-REV SLIDER, SPRINGS & KEYS FITS CHEVY & GMC '68-'91 (WT304-80).

Muncie SM465
ManufacturerGeneral Motors
Body and chassis
Class4-speed manual

Sm 465 Transmission Parts Kits


The Muncie SM465 is a heavy-duty, four-speed manual transmission built by General Motors for use in light and medium duty trucks from 1968 to 1991. The SM465 can be found in Chevrolet and GMC full-size trucks, Blazers, Suburbans, among other models. Some applications beyond one-ton pickup trucks came with larger input shafts. How to clear app memory. Favored by off-road drivers, the SM465 has a very low first gear suitable for rock-crawling. The SM465 has developed a reputation as a highly durable transmission. For the 1992 model-year, the SM465 was replaced in 3/4- and 1-ton pickup truck applications by the New Venture Gear 4500 transmission.

The 'SM' in the transmission's designation does not stand for Synchro-Mesh, contrary to popular belief. 'SM' stands for 'SAGINAW MUNCIE'.GM literature also often referred to this as a CH465, referencing Chevrolet.

Gear ratios are:

  • First - 6.55:1
  • Second - 3.58:1
  • Third - 1.70:1 -Sometimes incorrectly listed as 1.57:1.
  • Fourth - 1.00:1
  • Reverse - 6.09:1

The SM465 features dual provisions for power take-offs. The 1988-91 versions have an aluminum top with improved shift feel. The 1985 and newer versions utilize a hydraulic clutch release, replacing a mechanical linkage in older versions. A common wear factor in the form of abuse leads to having to manually hold the gear selector in third. There have been three different output shafts for pickup trucks. Early four-wheel drive was a short 10 spline, late 4WD was long 32 spline, and all two-wheel drives were 35 spline. Early 4WDs came mated to New Process 205 transfer cases. The 1981 and later versions[1][circular reference] came with a New Process 208 if not a 205. New Process 241 was used behind the 465 starting in 1989 when it replaced the New Process 208 in the V-series trucks. The SM465 was the only manual transmission available for 1988-1991 R/V-series trucks and SUVs.


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Sm465 Transmission Mount


Below find a parts illustration for the Chevrolet and GMC International and Plymouth 4 speed manual transmission used in the SM465 PARTS ILLUSTRATIONfollowing models: Chevrolet & GMC Pickup, Blazer, Jimmy, and Vans. The SM465 has a cast iron case and top cover.

Sm465 Transmission 4x4

Need an individual part (call with item number off the illustration below) or need a rebuilt transmission, bearing overhaul kit or other parts give us a call 888-824-2012, free technical support. Buy factory direct, let us help you save some money! We offer both new and used as well as parts that are hard to find. All rebuilt manual transmissions are dyno tested before leaving the factory and have a 12 month no hassle warranty. You are welcome to download and print this illustration. You can find the rebuild units and parts we offer for the SM465 on our website.

Free SM465 Chevrolet & GMC Pickup and Vans Parts Schematic