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| | | | Joined: Apr 2016 Posts: 13 'Bolter | | 'Bolter Joined: Apr 2016 Posts: 13 | Will a SM465 Chevy (Muncie?) trans bolt up to a 216 CHEVY SIX or do I need an adapter?
Last edited by Gdads51; 08/06/2024 1:13 AM. Reason: fixed title info and model ID
| | | | | Joined: May 2015 Posts: 11,181 Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums | | Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums Joined: May 2015 Posts: 11,181 | Mike, I'm moving your post in to the HiPo shop, where you'll be sure to get an answer. You already know what the part you have is, so Name that Part section isn't appropriate.
Kevin 1951 Chevy 3100 work truckFollow this saga in Project JournalPhotos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together. | | | | | Joined: Sep 2011 Posts: 1,462 'Bolter | | 'Bolter Joined: Sep 2011 Posts: 1,462 | The o.d. of the front brg retainer is larger on the 465 than the original trans.
Why not use a sm420?
BC
1960 Chevy C10 driver 261 T5 4.10 dana 44 power loc
1949 GMC 250 project in waiting
1960 C60 pasture art
Retired GM dealer tech. 1980 - 2022
| | | | | Joined: Jun 2011 Posts: 5,096 Crusing in the Passing Lane | | Crusing in the Passing Lane Joined: Jun 2011 Posts: 5,096 | Or one could bore out the 216 bellhousing, more work, though.
Ed
'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.
| | | | | Joined: Jan 2019 Posts: 2,244 Herder of Cats, Goats, and Sheep (moderator) | | Herder of Cats, Goats, and Sheep (moderator) Joined: Jan 2019 Posts: 2,244 | Are you sure it is a T465? An SM465 came in later trucks.
The T465 was a transverse transmission they put behind the V6 in Fieros.
If you mean SM465, then you would at least have to change the bellhousing. What other parts do you have to go with it already?
Last edited by Peggy M; 08/05/2024 11:50 PM.
| | | | | Joined: Apr 2016 Posts: 13 'Bolter | | 'Bolter Joined: Apr 2016 Posts: 13 | Have a chance to get a GMC rear axle to replace original closed driveshaft, would use that trans with it. | | | | | Joined: Apr 2016 Posts: 13 'Bolter | | 'Bolter Joined: Apr 2016 Posts: 13 | So I would need the SM420, different bellhousing, the GMC rear, and drive shaft.What else?
Last edited by Peggy M; 08/05/2024 11:52 PM.
| | | | | Joined: Apr 2016 Posts: 13 'Bolter | | 'Bolter Joined: Apr 2016 Posts: 13 | Would an S-10 5-speed be easier to use? | | | | | Joined: Jan 2019 Posts: 2,244 Herder of Cats, Goats, and Sheep (moderator) | | Herder of Cats, Goats, and Sheep (moderator) Joined: Jan 2019 Posts: 2,244 | Just to make sure we understand.
You want to take the original transmission, closed driveshaft, and axle out and put in a newer GMC axle with some kind of transmission that is compatible?
Also, what vehicle is this for? That could make a difference for mounts and such. | | | | | Joined: Feb 2004 Posts: 29,885 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,885 | A SM 420 will bolt to the bellhousing found on a 216 TRUCK engine from 1948-53. The bellhousing behind a 216 in a passenger car has a totally different bolt pattern for the transmission, and a different diameter hole for the bearing retainer IMHO. The SM420 can be had in either open driveline of torque tube configuration at the rear. The basic transmissions, other than the rear bearing retainer, are the same.
Jerry
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| | | | | Joined: Mar 2010 Posts: 10,310 Renaissance Man | | Renaissance Man Joined: Mar 2010 Posts: 10,310 | Would an S-10 5-speed be easier to use? That would be my choice all day long. You will need to pay attention to the rear axle gear ratio, and choose a T-5 with the best 5th gear overdrive ratio for the axle ratio you are going with. They range from .72 to .86 overdrive. If I were to put a T-5 behind a 216, I would chose a T-5 with a .72 5th gear ratio, and a 4.10 or numerically higher ratio rear axle gears. You need a higher ratio rear axle gear ratio to keep the RPM higher in order to get as much torque/horsepower out of that relatively underpowered 216. With this setup, you will be in the optimal power range every time you shift gears. No more lugging the engine every time you shift gears and no more screaming engine right before shifting gears.
1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission
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