Sm465 ratios

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The Synchro-mesh or SM is a heavy-duty, four-speed manual transmission built by General Motors for use in light and medium duty trucks from to at the factory in Muncie, Indiana ; it was designed to replace the somewhat similar Muncie SM transmission , which had been in production since just after World War II. Some applications beyond one-ton pickup trucks came with larger input shafts. Favored by off-road drivers, the SM has a very low first gear suitable for rock-crawling. The SM has developed a reputation as a highly durable transmission. The "SM" in the transmission's designation does not stand for Synchro-Mesh, contrary to popular belief. GM literature also often referred to this as a CH, referencing Chevrolet. The SM features dual provisions for power take-offs.

Sm465 ratios

Register or Log In To remove these advertisements. Web chevytrucks. Hey guys, I was looking at gear ratios today, I want to do a manual conversion on the 68 but it seems difficult to find A. But I have found many sm's and I was looking at the 1. Was wondering if anyone is running this setup and how do you like it? My dad always tried to convince me HEI was pointless! Welding is a lot like sex, you don't have to be great with the rod as long as you thoroughly prep the surface and your good at grinding My build : 68 C10 Short Bed Conversion. Can't speak specifically to the SM but my 70 C10 is a manual 3-speed with a 3. When towing, I have to feather the clutch to get going good but you would not have that problem with the 6. I do like that my truck can do highway speeds without straining the engine. Of course, you won't be doing any speed shifting with the SM Read The Factory Manuals I dont see why the sm and 3.

Recommended Communities. I went to 33's and it was OK, but when the sm465 ratios expired and I swapped in my with Products specifications.

This transmission can be identified by a case length of 12". The casting numbers on the case should be GM, or The top shift cover casting number should be GM The P. This transmission has a non-synchro first gear. The gear ratios for this transmission are as follows:.

The Synchro-mesh or SM is a heavy-duty, four-speed manual transmission built by General Motors for use in light and medium duty trucks from to at the factory in Muncie, Indiana; it was designed to replace the somewhat similar Muncie SM transmission , which had been in production since just after World War II. Some applications beyond one-ton pickup trucks came with larger input shafts. Favored by off-road drivers, the SM has a very low first gear suitable for rock-crawling. The SM has developed a reputation as a highly durable transmission. The "SM" in the transmission's designation does not stand for Synchro-Mesh, contrary to popular belief. GM literature also often referred to this as a CH, referencing Chevrolet. The SM features dual provisions for power take-offs.

Sm465 ratios

Register or Log In To remove these advertisements. Web chevytrucks. I have a 69 c20 and have looked up rpm calculators for figuring out what rpms ill be running at driving speeds and theres a buch of different out comes for each rpm calculator so i figured id ask the people that actually run these trucks. I have a sm and have decided to switch it out to 5 lug and am wondering what rpms ill be running for different gear ratios and what kind of mpg ill get also. I usually cruse around town and dont hit highway speeds much but i do at least once a week go for about a 30 mile trip id like to take my truck on in the summer. Any information on this would be great. I can't understand why different online calculators should give you different answers, but I always do mine with a hand-held calculator. The magic number is Divide your tire diameter into that to get tire revolutions per mile, and then multiply the result by your axle ratio. As an example, let's say you have 31" tires and a 4.

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Can anyone shed some insight on my options here? I never towed anything bigger than a 16' aluminum flat bottom boat with a 70hp outboard but it did fine. Engine to Transmission Adapters Bellhousings. AVS Forum. AX15 Retrofit Adapter Packages. Back RubiCrawler. Tools Tools. Posts: 7, Hey guys, I was looking at gear ratios today, I want to do a manual conversion on the 68 but it seems difficult to find A. This is an older thread, you may not receive a response, and could be reviving an old thread. Digg del. Back Toyota Land Cruiser.

Easily one of the very best four-speed transmissions ever built; the SM Our Muncie is professionally and meticulously rebuilt. We use the best components, including bearings, synchronizers, bushings, seals and gaskets built by our SM specialist and expert.

This pattern was also found on the and chain-driven transfer cases. A turn-key SM, professionally built, adapted or OEM style and delivered to your door - ready for a variety of engines and Jeep transfer cases. But I don't think I would want it in any of my cars. Retrieved January 23, Some claim faster shifts from using a 50W engine oil in their transmission and we do not consider this to be contraindicated unless you operate your vehicle in a very warm environment. Customers who bought this item also bought. Excluding shipping. There are no junkyard trans that will handle that kind of power for very long so you'll have to look at rebuilt. The Crane that's in it now has just about the perfect power band for the transmission. I do like that my truck can do highway speeds without straining the engine.