What is needed to swap a SM465 in place of a 3 sp?? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

67_C-30 · 08-23-2008, 06:44 PM

What is involved in putting a SM465 in a '67 K10 4X4 that has a 3OTT? I don't have the truck here to look at, and I don't know all the specifics except that it is a factory K10 with the original 327 and 3 sp. I don't know what transfer case it has, but it supposed to be stock.

sandking · 08-23-2008, 07:18 PM

You we be better off using a 465/205 that is already mated together. That way you have the bell housing, trans, xfer case and adapter that are meant for each other. Then you would need the clutch pedal and the neccesary shifters. The drive shaft length would need to be checked too.

msgross · 08-23-2008, 07:27 PM

Quote:

Originally Posted by sandking

You we be better off using a 465/205 that is already mated together. That way you have the bell housing, trans, xfer case and adapter that are meant for each other. Then you would need the clutch pedal and the neccesary shifters. The drive shaft length would need to be checked too.

yep. original tc was a rockwell T221, not highly sought after due to noise, availability of parts. Find someone selling the 465/205 setup and then find driveshafts to fit.

67_C-30 · 08-23-2008, 10:03 PM

Would a '67 K10 with a 4 speed came with the T221?

msgross · 08-23-2008, 10:20 PM

Quote:

Originally Posted by 67_C-30

Would a '67 K10 with a 4 speed came with the T221?

they all did... my 68 has 465/221 combo stock

205's came out in 69 i've been told.

67_C-30 · 08-23-2008, 11:22 PM

So what would be needed to just replace the 3sp with a SM465? I don't think a transfer case change is anything the owner wants to do.

sandking · 08-24-2008, 03:05 AM

I am sure the input shaft is different.

**special-K** · 08-24-2008, 06:57 AM

My shortbed is a 3spd/NP205 and I`m making it a 4spd.Although I already have a nP205 I bought a complete changeover.The length of the input and spline count(maybe?)are different.The adaptor that mounts between is different.You can get this set-up for between $200-$300.It`s the best way to go.

**Yukon Jack** · 08-24-2008, 09:56 AM

Now wait a minute, your saying you can just replace the 3 on the tree with an SM465 - when I did it I had to swap in a bbc along with it's SM465 to get rid of the 3 on the tree

I had no idea I could just have replaced the tranny without replacing the motor.

Seriously though, when I was looking into this swap I heard from a few people that the bellhousing for the three on the tree tranny was different and I would need a different bellhousing. I did end up swapping engines so I never had to figure out if that issue was correct. Just something for you to keep in mind, a different bellhousing may be needed.

Gotta say I agree with the above advice to go ahead and update to an SM465/NP205 combo - in retrospect I wish I would have done that when I swapped in the SM465 in my 69 K20 - I'm presently replacing the Rockwell T221 for an NP205 as we speak.

msgross · 08-24-2008, 02:26 PM

I going for "nostalgia points" and keeping my T221...

actually i'm just to cheap to upgrade!

**special-K** · 08-24-2008, 08:52 PM

I`ll see what the difference is between a 3spd bellhousing and a 4spd one.Does anyone know for a fact they are different.

Blue_71 · 08-25-2008, 01:43 AM

3 speed synchronized tranny has the same bellhousing as a SM465... my K20 has a 3 speed bellhousing on it (long story)

however, the pre 69ish unsynchronized 3 speeds (little short thing, i can try to get pics) has a different bellhousing. the bottem two bolts are wider, not in line with the top ones.

also, a SM420 uses a different bellhousing than a SM465... the input bearing retainer is smaller on a SM420

**special-K** · 08-25-2008, 10:06 PM

Yeah,I was thinking about this and I`m sure GM made all the differences in the adaptors.The driveshafts are the same and the t-case/crossmember are in the same place with all transmissions.

**Yukon Jack** · 08-25-2008, 10:23 PM

My 69 K20's Rockwell tc crossmember is not in the same location as my 70 K5's tc crossmember that was originally for a Dana 20 tc. I just went and measured and my 69 K20's crossmember sits 2 1/2" closer to the front cab body mount than my 70 K5's crossmember.

08-23-2008, 06:44 PM	#1
67_C-30 I have a radical idea! Join Date: Jan 2005 Location: Sweet Home Alabama! Posts: 6,513	What is needed to swap a SM465 in place of a 3 sp?? What is involved in putting a SM465 in a '67 K10 4X4 that has a 3OTT? I don't have the truck here to look at, and I don't know all the specifics except that it is a factory K10 with the original 327 and 3 sp. I don't know what transfer case it has, but it supposed to be stock. __________________ '67 C-30 Dually Pickup 6.2 Turbo Diesel, NP435 ‘72 C-10 SWB , 350 4bbl, TH350 '69 C-10 SWB , 250 L6, 3 OTT '69 GMC C3500, dump truck, 351 V6, NP435 '84 M1009 CUCV Military Blazer 67 C-30 Turbodiesel build thread http://67-72chevytrucks.com/vboard/s...d.php?t=254096 My trucks http://s226.photobucket.com/albums/d...ediafilter=all Member of the 1-Ton Club!

08-23-2008, 07:18 PM	#2
sandking .....I am working on it..... Join Date: Jul 2007 Location: Anaheim Hills, Ca Posts: 960	Re: What is needed to swap a SM465 in place of a 3 sp?? You we be better off using a 465/205 that is already mated together. That way you have the bell housing, trans, xfer case and adapter that are meant for each other. Then you would need the clutch pedal and the neccesary shifters. The drive shaft length would need to be checked too. __________________ . . . . . View my build thread HERE

08-23-2008, 10:03 PM	#4
67_C-30 I have a radical idea! Join Date: Jan 2005 Location: Sweet Home Alabama! Posts: 6,513	Re: What is needed to swap a SM465 in place of a 3 sp?? Would a '67 K10 with a 4 speed came with the T221? __________________ '67 C-30 Dually Pickup 6.2 Turbo Diesel, NP435 ‘72 C-10 SWB , 350 4bbl, TH350 '69 C-10 SWB , 250 L6, 3 OTT '69 GMC C3500, dump truck, 351 V6, NP435 '84 M1009 CUCV Military Blazer 67 C-30 Turbodiesel build thread http://67-72chevytrucks.com/vboard/s...d.php?t=254096 My trucks http://s226.photobucket.com/albums/d...ediafilter=all Member of the 1-Ton Club!

08-23-2008, 11:22 PM	#6
67_C-30 I have a radical idea! Join Date: Jan 2005 Location: Sweet Home Alabama! Posts: 6,513	Re: What is needed to swap a SM465 in place of a 3 sp?? So what would be needed to just replace the 3sp with a SM465? I don't think a transfer case change is anything the owner wants to do. __________________ '67 C-30 Dually Pickup 6.2 Turbo Diesel, NP435 ‘72 C-10 SWB , 350 4bbl, TH350 '69 C-10 SWB , 250 L6, 3 OTT '69 GMC C3500, dump truck, 351 V6, NP435 '84 M1009 CUCV Military Blazer 67 C-30 Turbodiesel build thread http://67-72chevytrucks.com/vboard/s...d.php?t=254096 My trucks http://s226.photobucket.com/albums/d...ediafilter=all Member of the 1-Ton Club!

08-24-2008, 03:05 AM	#7
sandking .....I am working on it..... Join Date: Jul 2007 Location: Anaheim Hills, Ca Posts: 960	Re: What is needed to swap a SM465 in place of a 3 sp?? I am sure the input shaft is different. __________________ . . . . . View my build thread HERE

08-24-2008, 06:57 AM	#8
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,862	Re: What is needed to swap a SM465 in place of a 3 sp?? My shortbed is a 3spd/NP205 and I`m making it a 4spd.Although I already have a nP205 I bought a complete changeover.The length of the input and spline count(maybe?)are different.The adaptor that mounts between is different.You can get this set-up for between $200-$300.It`s the best way to go. __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

08-24-2008, 09:56 AM	#9
Yukon Jack Post Whore Join Date: Feb 2000 Location: Rose Hill, KS, USA Posts: 12,683	Re: What is needed to swap a SM465 in place of a 3 sp?? Now wait a minute, your saying you can just replace the 3 on the tree with an SM465 - when I did it I had to swap in a bbc along with it's SM465 to get rid of the 3 on the tree I had no idea I could just have replaced the tranny without replacing the motor. Seriously though, when I was looking into this swap I heard from a few people that the bellhousing for the three on the tree tranny was different and I would need a different bellhousing. I did end up swapping engines so I never had to figure out if that issue was correct. Just something for you to keep in mind, a different bellhousing may be needed. Gotta say I agree with the above advice to go ahead and update to an SM465/NP205 combo - in retrospect I wish I would have done that when I swapped in the SM465 in my 69 K20 - I'm presently replacing the Rockwell T221 for an NP205 as we speak. __________________ 1970 Blazer with a 400 sbc and 4" lift 1980 Pontiac Trans Am, 455 Oldsmobile 2012 Kawasaki Concours 14 Last edited by Yukon Jack; 08-25-2008 at 11:49 AM.

08-24-2008, 02:26 PM	#10
msgross Registered User Join Date: Jul 2006 Location: Central PA Posts: 12,201	Re: What is needed to swap a SM465 in place of a 3 sp?? I going for "nostalgia points" and keeping my T221... actually i'm just to cheap to upgrade! __________________ The Garage: 1968 K-10 SWB - "Project Money Pit" 1996 Z-71 - "huntin rig" 1969 C-10 LWB (SOLD) "Project flip that truck or else" 1993 Passport, F@rd 1-ton (SOLD)"Project Cousin Eddie" My Garage Build "The 1,000 footer"

08-24-2008, 08:52 PM	#11
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,862	Re: What is needed to swap a SM465 in place of a 3 sp?? I`ll see what the difference is between a 3spd bellhousing and a 4spd one.Does anyone know for a fact they are different. __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

08-25-2008, 10:06 PM	#13
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,862	Re: What is needed to swap a SM465 in place of a 3 sp?? Yeah,I was thinking about this and I`m sure GM made all the differences in the adaptors.The driveshafts are the same and the t-case/crossmember are in the same place with all transmissions. __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

08-25-2008, 10:23 PM	#14
Yukon Jack Post Whore Join Date: Feb 2000 Location: Rose Hill, KS, USA Posts: 12,683	Re: What is needed to swap a SM465 in place of a 3 sp?? My 69 K20's Rockwell tc crossmember is not in the same location as my 70 K5's tc crossmember that was originally for a Dana 20 tc. I just went and measured and my 69 K20's crossmember sits 2 1/2" closer to the front cab body mount than my 70 K5's crossmember. __________________ 1970 Blazer with a 400 sbc and 4" lift 1980 Pontiac Trans Am, 455 Oldsmobile 2012 Kawasaki Concours 14 Last edited by Yukon Jack; 08-25-2008 at 10:52 PM.



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