sm465 pto hydraulic pump factory

The SM465 is an outstanding, heavy-duty truck transmission designed and used in ½, 3/4 and 1+ ton trucks. The SM465 was made by General Motors from 1968 to 1991. They are found primarily in GM and Chevrolet trucks, Blazers, Suburbans and many other models falling under the 1/4-ton to 1-1/2-ton platforms.

The SM465 has a 1-1/8" diameter, ten spline input shaft that has a stick-out of 6-1/2" from the front face of the transmission. The pilot tip is ~19/32" in diameter. The front bearing retainer flange measures an unusually large 5-1/8" in diameter and the bearing retainer tube is 1-3/8" in diameter. The front bolt pattern is the consistent GM Muncie / Saginaw four-bolt pattern as found on GM bellhousings and transmissions from the 1940"s through the 1990"s.

There are three principal versions of the SM465, each based on the era and configuration of the transmission. There is no known mechanical superiorities to either earlier or later versions.

The earlier era of the SM465 include the 1968 - 1978 transmissions. There were both 2wd and 4wd versions. Internally, they are identical to each with the exception of the transmission mainshaft. The 4wd version of this mainshaft (or "output shaft") has a 10-spline output with a 2-5/8" stickout and an accompanying 4wd adapter housing. The 2wd version has a 35-spline threaded mainshaft compatible with a driveshaft yoke, and accompanying 2wd style tailhousing.

The later era of the SM465 include the 1979 - 1991 transmissions. A minor internal change of the 1st gear bushing and thrust washer occurred, in addition to a change from a shorter 10-spline, 4wd output shaft to a 32-spline 4wd output shaft - coinciding with the change of bolt pattern in the New Process 205 transfer case from a figure "8" input bolt pattern to a round, six-bolt input pattern. This pattern was also found on the 208 and 241 chain-driven transfer cases.

The last years of SM465 featured a direct-drive (4th gear) switch to signal a lean or cruise mode operation to the GM Engine Control Module (ECM). These final versions had an aluminum top cover and a revised input shaft and input bearing combination. They were found in the C/K Series trucks. Suburbans, however, continued to use the earlier SM465 with the cast iron top cover.

This transmission makes an excellent conversion transmission due to its adaptability into most Jeeps. Both 2wd and 4wd versions of the SM465 can be used equally well, and there are no inherent advantages to either one once you have installed our adapter assembly.

A turn-key SM465, professionally built, adapted or OEM style and delivered to your door - ready for a variety of engines and Jeep transfer cases. Read more...

As the reader will conclude, the Chevrolet and General Motors SM465 will marry directly to a GM style bellhousing. This includes Chevy car, Buick, Oldsmobile and Pontiac bellhousings. However, since this transmission has such a large bearing retainer, the car size bellhousing bore is smaller than the transmission"s input bearing retainer. If you need to join this transmission to a GM bellhousing with the 4-11/16” bore, it can be done. The bore must be opened up to 5.000” and the retainer turned down to 4.995” as precision slip-fit. We can perform this service with a very quick turnaround, or you may have it done by a good machine shop local to you. We also sell new bearing retainers turned to the dimension you require.

The SM465 is relatively simple torebuild. Many shadetree mechanics do very outstanding rebuilds if they have access to a press, snap ring pliers and bearing pullers. Many choose to do a full rebuild during the adaptation process, and our instruction guides feature all the details, diagrams, pics and tricks required to do professional level work.

There is a guy around SAC. that uses the PTO on his 465 to run a post hole digger attachment he has on his k10. He has a contract with the local telephone company to dig the holes in the back country and on slopes that their bigger trucks can not get to. That is the 2 things I have personally seen the PTO used for.

Prince PTO pumps are specifically designed for PTO drive operation on all sizes of farm tractors. No additional gearbox is required. Pumps are mounted by sliding the internally splined pump onto the PTO splined shaft and restraining rotation with a torque arm. See page P6 for the PTO pump torque arm kit.

The Saginaw Michigan 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 at the factory in Muncie, Indiana; it was designed to replace the somewhat similar Muncie SM420 transmission, which had been in production since just after World War II.

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. 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 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.

I have a "93 NV4500 I"m planning on installing in my 71 1 ton dump project. I just need a 1/1 without the pump on it. The hoist has the pump mounted directly on the piston. I just need the gear so I can make the driveshaft for the pump. Would prefer a used one. Anyone know what Muncie or Chelsea part number is compatible?

I am interested in this, let us know if you find which one it is. I have a big Warn industrial hydraulic winch I"d like to sell if you end up getting the hydraulics set up.

Most of the PTO equipment is standard for most of the truck transmissions that are available. Normally if the truck transmission has the standard SAE port on it like the port (or hole, or PTO plate) on a SM465, NP435, NP420, it will fit. However, you need to make CERTAIN that it will fit (and it has the right gears to fit) before buying. NV4500 PTOs are still available new, so you shouldn"t have any trouble finding them. If I remember correctly, your NV4500 mount should have one bolt on top and bottom, and 2 on each of the two sides, for a total of 6.

You may want to consider converting your system to a PTO and hydraulic pump, because these are a bit more common than just a PTO gear drive - or the driveshafts. Driveshafts are problematic to begin with, and if you are in rough terrain with weeds, it ends up winding a big ball of weeds on the underside of the truck. Most often most guys don"t care about this for the most part - except when the driveshaft is run next to the exhaust, which causes those weed balls to catch fire.

If you decide to run a hydraulic pump, you can use it to operate other hydraulic items on your truck, like the winch suggested earlier. You may be able to use a lift or operate a hydraulic crane, if you have need of that type of thing. I have seen one that operated a fence post driver.

Hydraulic lines are fairly easy to run if you are using metal lines, and these are a lot cheaper than having hydraulic all-rubber lines made up for the entire length. IF you use metal lines for most of the length and just use rubber at the ends, it doesn"t cost an huge amount.

You can also do a search on Dana or Chelsea PTOs. If you do a search on just PTOs, it can come up with a lot of different items (like 23,000+ items when I did a search on just PTO) - it makes it easier to search when you use the names with the PTO.

There are several pumps and gear output SAE mount PTOs available, most of which should fit the NV4500. New and rebuilt PTO outputs are $425 and up, usually. Used are less, but you need to be extra careful when buying these.

Make sure when you install the PTO that you either mount it when the transmission is on it"s side so that the gear lube doesn"t come out, or you need to catch all the gear lube that comes out so you can use it again. The gear lube for the NV4500 is EXPENSIVE. I use the OEM stuff, but there are some aftermarket oils that are cheaper.

Thank you everyone for the suggestions. I"m aware of the special oil. I really need to find just the gear, without the pump. The pump is all built into the hoist system, there isn"t anywhere to hook hydraulic lines up. I have PTO gears off a SM420, SM465, and the one off the Ford truck that the dump box came on, they all bolt to the 4500, but the gear pitch is different. I don"t think the driveshaft will be a problem, this thing isn"t going to see any serious use, just something to haul a little firewood, scrap, mulch etc. thanks everyone again for the help.

I purchased an 83 Chevy with a SM465 4 speed transmission. This PTO was hanging off the side of it. Must fit all SM465s. This PTO is a 6 hole reversible Chelsea. You put the Transmission in neutral and you can engage the shaft forward and backwards. Can be used for winch, air compressor, generator, pump/sprayer, and so on