Help - need to separate a Dana 20/30 TC from an SM465 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

CCCC · 08-03-2016, 07:11 PM

This entire unit is on the floor and I am selling the whole front assembly (TC/shaft/diff/axles/hubs/springs/etc.) but am saving the SM465. All bolts on the back of the SM465 are out but the trans does not want easily to separate from the TC housing. This is the setup (older) where there is a shaft housing between the front of the TC and the rear of the transmission. The TC shifter bracket is attached to the side of this housing.

I can get a small wedge between the two and gain a bit of movement, but do not want to force the situation unduly. Is there some sort of snap ring or other attachment inside that housing that connects the trans output shaft to the drive of the TC?

I also can remove that housing from the TC end - a few bolts. Is that needed?

Any info/advice on this will be appreciated. Guy is coming tomorrow to pick up the TC and other parts - I need to rescue the transmission by then.

**special-K** · 08-04-2016, 06:49 AM

It's been a long time since I dealt with a Dana 20 (I think) TC. It was behind a 3spd. I think you need to separate the TC from that housing to access whatever is keeping that fixed to the trans. Could be wrong.

I never knew of this combo. First I thought that TC only came behind the 3spds and the NP205 behind 4spd, but I have seen 3spd/NP205 combos. I guess any combo of these two trans and TCs were possible

CCCC · 08-04-2016, 11:39 AM

Thanks special-K. I'll get out there and unbolt that housing at the TC end to see what can be done.

08-03-2016, 07:11 PM	#1
CCCC Registered User Join Date: Mar 2007 Location: San Pedro River, SE Arizona Posts: 734	Help - need to separate a Dana 20/30 TC from an SM465 This entire unit is on the floor and I am selling the whole front assembly (TC/shaft/diff/axles/hubs/springs/etc.) but am saving the SM465. All bolts on the back of the SM465 are out but the trans does not want easily to separate from the TC housing. This is the setup (older) where there is a shaft housing between the front of the TC and the rear of the transmission. The TC shifter bracket is attached to the side of this housing. I can get a small wedge between the two and gain a bit of movement, but do not want to force the situation unduly. Is there some sort of snap ring or other attachment inside that housing that connects the trans output shaft to the drive of the TC? I also can remove that housing from the TC end - a few bolts. Is that needed? Any info/advice on this will be appreciated. Guy is coming tomorrow to pick up the TC and other parts - I need to rescue the transmission by then. __________________ CCCC 67 Sting Ray Coupe 327 4sp; 68 K10 Suburban 327 4sp; 69 K20 Lifted 383 4sp; 69 C80 Fire Truck 478 V6 5sp/2sp; 69 C20 Longhorn 327 4sp; 70 C30 Wrecker 350 4sp; 70 C30 Flat Bed 350 4sp; 71 C20 LWB 350 4sp; 72 K5 Blazer 350 4sp; 72 C30 Flat Bed Gooseneck Hauler with sleeper 350/TH400; 72 C20 Longhorn 402 4sp; 52 Mack LTL Supercharged Cummins 5sp x 3sp; 01 Dodge 5.9 HO Cummins 6spd; 02 Safari Trek 2430 8.1 Vortec on Workhorse Chassis; 03 Silverado 2500 HD 4wd Duramax/Allison Moved but still in the family 70 C20 Custom Camper 350/TH350; 72 K5 Blazer CST Highlander 350/TH350 Recently sent to new homes 72 C30 MoHome 402 4sp; 72 K5 Blazer Conv 350 4sp; 75 GMC 6000 Aerial 350 w Allison; 72 GMC 3500 Utility 350 4sp; 70 GMC 3500, 350 4sp Last edited by CCCC; 08-03-2016 at 08:12 PM.

08-04-2016, 06:49 AM	#2
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,851	Re: Help - need to separate a Dana 20/30 TC from an SM465 It's been a long time since I dealt with a Dana 20 (I think) TC. It was behind a 3spd. I think you need to separate the TC from that housing to access whatever is keeping that fixed to the trans. Could be wrong. I never knew of this combo. First I thought that TC only came behind the 3spds and the NP205 behind 4spd, but I have seen 3spd/NP205 combos. I guess any combo of these two trans and TCs were possible __________________ "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 ~

08-04-2016, 11:39 AM	#3
CCCC Registered User Join Date: Mar 2007 Location: San Pedro River, SE Arizona Posts: 734	Re: Help - need to separate a Dana 20/30 TC from an SM465 Thanks special-K. I'll get out there and unbolt that housing at the TC end to see what can be done. __________________ CCCC 67 Sting Ray Coupe 327 4sp; 68 K10 Suburban 327 4sp; 69 K20 Lifted 383 4sp; 69 C80 Fire Truck 478 V6 5sp/2sp; 69 C20 Longhorn 327 4sp; 70 C30 Wrecker 350 4sp; 70 C30 Flat Bed 350 4sp; 71 C20 LWB 350 4sp; 72 K5 Blazer 350 4sp; 72 C30 Flat Bed Gooseneck Hauler with sleeper 350/TH400; 72 C20 Longhorn 402 4sp; 52 Mack LTL Supercharged Cummins 5sp x 3sp; 01 Dodge 5.9 HO Cummins 6spd; 02 Safari Trek 2430 8.1 Vortec on Workhorse Chassis; 03 Silverado 2500 HD 4wd Duramax/Allison Moved but still in the family 70 C20 Custom Camper 350/TH350; 72 K5 Blazer CST Highlander 350/TH350 Recently sent to new homes 72 C30 MoHome 402 4sp; 72 K5 Blazer Conv 350 4sp; 75 GMC 6000 Aerial 350 w Allison; 72 GMC 3500 Utility 350 4sp; 70 GMC 3500, 350 4sp



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