How many gears does a SM465 have?
How many gears does a SM465 have?
The SM465 is often considered the successor of the Muncie SM420. It is a fully synchronized, four speed manual transmission found in many GMC and Chevrolet pickups.
How heavy is a SM465?
SM465 vs. SM420
| SM465 | SM420 | |
|---|---|---|
| Length(in.) | 12.0 | 10.4 |
| Height (in.) | 18.0 | 17.0 |
| Weight (lbs.) | 175 | 135 |
| Input Shaft | 1 1/8-in., 10-spline or 1 1/2-in., 10-spline | 1 1/8-in., 10-spline |
How big is the transmission on a GM SM465?
The shift pattern itself gives misconceptions to many as it indicates L-1-2-3-R, which many consider as a 3 speed. The SM465 transmission comprises of both a cast iron case and top cover. The cover is retained by 8 bolts. The transmission measures in at a large but acceptable 12” in overall length.
What kind of throw out bearing does a GM SM465 have?
The snout area of the retainer for the throw out bearing remained the standard 1.34” As with most GM transmissions during this era; the SM465 retained the standard GM Saginaw 4 bolt pattern on the front of the transmission. It should also be noted that during the last years of the SM465, the transmission was offered with an aluminum top cover.
What kind of oil to use for SM465 transmission?
About the SM465 When filling your 465 with gear oil, we recommend that you select a conventional mineral oil or a para-synthetic in lieu of a full synthetic oil. Properly assembled manual gearboxes do not have the thermal strains seen by combustion engines or hypoid gears.
Can a SM465 shift at a normal rate?
At the time no one told me but apparently the SM465 shifts very slow and shifts are met with resistance. You cannot shift the 465 fast or even at a normal rate as you would on a normal car or small truck.
When did the GMC SM465 transmission come out?
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 at the factory in Muncie, Indiana. The SM465 can be found in Chevrolet and GMC full-size trucks, Blazers, Suburbans, among other models.
Is the SM465 a good 4 speed manual?
You need to figure out which is more important, winding it to 5000 RPM for every shift or have a proven sturdy tranny with a granny gear. I drove a SM465 in a 72 GMC P/U for mid 70’s to mid eighties and I was not unhappy with it in the slightest. It ranks as one of the best HD 4 sp manuals ever put in a 4×4.
Is the GM Muncie SM465 transmission of cast iron?
The SM465 is a top loaded, top shifting truck style transmission. This transmission is 12 ” long and features a cast iron top cover that is retained by eight bolts. The SM465 case is of cast iron. The case itself is generously ribbed both vertically and horizontally.
The snout area of the retainer for the throw out bearing remained the standard 1.34” As with most GM transmissions during this era; the SM465 retained the standard GM Saginaw 4 bolt pattern on the front of the transmission. It should also be noted that during the last years of the SM465, the transmission was offered with an aluminum top cover.
