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| | | | Joined: Jan 2015 Posts: 208 Shop Shark | | Shop Shark Joined: Jan 2015 Posts: 208 | Hi All, I picked up a SM465 out of a 87 chevy pickup. I did not have the sifter. My question is are all SM465 created equal? will an early model fit the later models? | | | | | Joined: Oct 2013 Posts: 331 Shop Shark | | Shop Shark Joined: Oct 2013 Posts: 331 | The shape of the shifter itself may change from one application to another, but from the point where it goes into the top cover and on down they should all be the same.
1950 4100 - unrestored and driven weekly for almost no reason at all.
| | | | | Joined: Jan 2015 Posts: 208 Shop Shark | | Shop Shark Joined: Jan 2015 Posts: 208 | Now I have yet another question, After eye balling the clearance between the original trans crossmember and the bottom of the cab I am starting to think the 87 SM465 will not fit in there unless I remove the old crossmember? Has anyone had this problem before and what did you do. I can try to raising the cab that might get the the access I need but if that crossmember is always going to be in the way should I try to work around it or remove it altogether. I really dont want to have to remove anything. Thoughts? http://i1062.photobucket.com/albums...6-4B0C-BA00-F0CBC29BF421_zpszszfbup4.jpghttp://i1062.photobucket.com/albums...A-4ED5-904F-DBC3B9C8506A_zpstyhlaf1x.jpg
Last edited by Blind1968; 07/26/2016 11:05 PM.
| | | | | Joined: Jun 2011 Posts: 5,096 Crusing in the Passing Lane | | Crusing in the Passing Lane Joined: Jun 2011 Posts: 5,096 | 465's with Al top covers and 32 spline outputs Take different top covers, I have one.
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 2015 Posts: 208 Shop Shark | | Shop Shark Joined: Jan 2015 Posts: 208 | My 465 does not have the Alum top cover. Did you have to remove the factory transmission crossmember to use the 465?
| | | | | Joined: Jun 2011 Posts: 5,096 Crusing in the Passing Lane | | Crusing in the Passing Lane Joined: Jun 2011 Posts: 5,096 | I have not installed the 465.
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: Dec 2015 Posts: 2,063 Big Bolt Forum Moderator | | Big Bolt Forum Moderator Joined: Dec 2015 Posts: 2,063 | what truck are you working on and what tranny are you trying to replace? I replaced the SM420 in my 59 Suburban with an SM465. I had to shorten the driveshaft since the 465 is longer but there were no issues with the cross member.
With the SM420 they made a few small changes to shift forks and if you change top covers, you can run into issues unless you stay within the same year group. Not sure on the 465 though. | | | | | Joined: Jan 2015 Posts: 208 Shop Shark | | Shop Shark Joined: Jan 2015 Posts: 208 | I have a 1949 3800, I think it originally had the SM420. I am planning on lifting the cab and see if the SM465 will sit in there without removing the crossmember. The newer bell housing looks like it might touch the firewall so I might have to trim a little off the lip. | | | | | Joined: Sep 2011 Posts: 1,453 'Bolter | | 'Bolter Joined: Sep 2011 Posts: 1,453 | Why are folks changing out SM420s for 465s? SM420 is a good box IMHO.
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: Jan 2015 Posts: 208 Shop Shark | | Shop Shark Joined: Jan 2015 Posts: 208 | Originally planed on putting in an automatic transmission, so the sm420 was sold with the old engine. The new engine combo will be a 283/SM465 | | | | | Joined: Jun 2004 Posts: 8,597 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 | Why are folks changing out SM420s for 465s? SM420 is a good box IMHO. The SM465 is better. Be aware the SM 465 has a larger front brg. retainer. You need a bell housing with the larger hole.
They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne SuperIn the Gallery Forum | | | | | Joined: Jan 2015 Posts: 208 Shop Shark | | Shop Shark Joined: Jan 2015 Posts: 208 | fortunately I have the bell housing for it. Anyone know it it will clear the factory transmission crossmember without modification? | | |
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