Saginaw 3 speed to Transfer Case Adapter - The 1947 - Present Chevrolet & GMC Truck Message Board Network

mi396ss · 10-27-2022, 06:12 PM

I have a 1972 K10 that has a Saginaw 3 speed in it. I pulled the transfer case and transmission and I am wondering how you get the adapter separated from the transmission? I took off the 5 bolts holding it to the transmission but it will only come back like an inch. Any help is appreciated.
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jjzepplin · 10-28-2022, 06:22 AM

I would like to see that! Pics?

**Accelo** · 10-28-2022, 10:28 AM

Just guessing here but it my be like the 4 speeds and you will have to pull the tapered pin from the reverse lever. This will allow the slider to pull loose from the gear.

Having never seen a 4 wheel drive three speed this is just a guess and I could be full of it.
Most manuals I have worked on were 4 speeds.
Cheers

mi396ss · 10-28-2022, 02:58 PM

I figured it out. It’s actually a Muncie HD 3 speed and not a Saginaw. I rotated the adapter and was able to see a circlip in there that needed to be squeezed. I’m all set. Thanks.

FYI. I’m guessing this was kind of rare but this K20 had this Muncie 3 speed backed by a NP205. There isn’t a whole lot of info out there on these.
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jjzepplin · 10-29-2022, 05:11 AM

Pics!!!!!

mi396ss · 11-07-2022, 06:53 PM

Here is a picture of it with the adapter. I can’t get them back together now, not sure what I’m missing here.
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jjzepplin · 11-08-2022, 06:35 AM

That sure looks like a car style 3 speed. I bet you could pop a 4 speed in there. I've never seen one. That must be rare. COOL!

**special-K** · 11-08-2022, 07:28 AM

I knew the 3spd was standard but never saw a 3spd K/20. I had a 3spd '71 K/10 with NP205 but never had that apart. The 3spd K/5s coupled to a small transfer case, maybe a Dana 20?

mi396ss · 11-08-2022, 09:25 PM

That’s what this is, 1972 K10 with 3 speed backed by NP 205.
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**my04** · 11-09-2022, 09:46 AM

'72 k10 SWB 400sbc 3 speed Muncie
I remember having the same issues as you are.
The adapter is a tight fit and the bolts will draw it in if you tighten them evenly, a little antisieze helps too.
It's actually a very heavy duty transmission except I hate the non syncronous 1st gear.

mi396ss · 11-09-2022, 06:00 PM

That’s it. Ok, thanks. I’ll try using the bolts to get it back together. Any idea what it’s worth?
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**my04** · 11-09-2022, 08:30 PM

Parts for these aren't easy to find, it doesn't neccesarily mean its rare or valuable but you don't come across these trannys everyday either.
I do keep an eye out for them just to have as a spare. My guess or hope would be under a $100.

mi396ss · 11-09-2022, 08:46 PM

Ok thanks.
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57taskforce · 11-10-2022, 09:20 PM

Thanks for posting pics up! My dad had a 71 K10 30+ years ago that had the same setup, before he swapped a 465 in it. You don’t see them very often in the K trucks.

10-27-2022, 06:12 PM	#1
mi396ss Registered User Join Date: Oct 2008 Location: U.P., Michigan Posts: 66	Saginaw 3 speed to Transfer Case Adapter I have a 1972 K10 that has a Saginaw 3 speed in it. I pulled the transfer case and transmission and I am wondering how you get the adapter separated from the transmission? I took off the 5 bolts holding it to the transmission but it will only come back like an inch. Any help is appreciated. Posted via Mobile Device

10-28-2022, 06:22 AM	#2
jjzepplin Registered User Join Date: Feb 2012 Location: Ruskin Florida Posts: 4,567	Re: Saginaw 3 speed to Transfer Case Adapter I would like to see that! Pics? __________________ 70 swb 4x4 406sbc 700r4 203/205 d60/14blt locker yadda yadda http://67-72chevytrucks.com/vboard/s...88#post6935688 Yeller 72 Blazer 2wd conversion project "No Daggum Money" http://67-72chevytrucks.com/vboard/s...d.php?t=550804 LS1-T56 3.73 LSD super budget build Blanco-2014 Sierra SWB https://67-72chevytrucks.com/vboard/...d.php?t=810350

10-28-2022, 10:28 AM	#3
Accelo Senior Member Join Date: Mar 2015 Location: washington Posts: 2,300	Re: Saginaw 3 speed to Transfer Case Adapter Just guessing here but it my be like the 4 speeds and you will have to pull the tapered pin from the reverse lever. This will allow the slider to pull loose from the gear. Having never seen a 4 wheel drive three speed this is just a guess and I could be full of it. Most manuals I have worked on were 4 speeds. Cheers

10-28-2022, 02:58 PM	#4
mi396ss Registered User Join Date: Oct 2008 Location: U.P., Michigan Posts: 66	Re: Saginaw 3 speed to Transfer Case Adapter I figured it out. It’s actually a Muncie HD 3 speed and not a Saginaw. I rotated the adapter and was able to see a circlip in there that needed to be squeezed. I’m all set. Thanks. FYI. I’m guessing this was kind of rare but this K20 had this Muncie 3 speed backed by a NP205. There isn’t a whole lot of info out there on these. Posted via Mobile Device

10-29-2022, 05:11 AM	#5
jjzepplin Registered User Join Date: Feb 2012 Location: Ruskin Florida Posts: 4,567	Re: Saginaw 3 speed to Transfer Case Adapter Pics!!!!! __________________ 70 swb 4x4 406sbc 700r4 203/205 d60/14blt locker yadda yadda http://67-72chevytrucks.com/vboard/s...88#post6935688 Yeller 72 Blazer 2wd conversion project "No Daggum Money" http://67-72chevytrucks.com/vboard/s...d.php?t=550804 LS1-T56 3.73 LSD super budget build Blanco-2014 Sierra SWB https://67-72chevytrucks.com/vboard/...d.php?t=810350

11-07-2022, 06:53 PM	#6
mi396ss Registered User Join Date: Oct 2008 Location: U.P., Michigan Posts: 66	Here is a picture of it with the adapter. I can’t get them back together now, not sure what I’m missing here. Posted via Mobile Device Attached Images

11-08-2022, 06:35 AM	#7
jjzepplin Registered User Join Date: Feb 2012 Location: Ruskin Florida Posts: 4,567	Re: Saginaw 3 speed to Transfer Case Adapter That sure looks like a car style 3 speed. I bet you could pop a 4 speed in there. I've never seen one. That must be rare. COOL! __________________ 70 swb 4x4 406sbc 700r4 203/205 d60/14blt locker yadda yadda http://67-72chevytrucks.com/vboard/s...88#post6935688 Yeller 72 Blazer 2wd conversion project "No Daggum Money" http://67-72chevytrucks.com/vboard/s...d.php?t=550804 LS1-T56 3.73 LSD super budget build Blanco-2014 Sierra SWB https://67-72chevytrucks.com/vboard/...d.php?t=810350

11-08-2022, 07:28 AM	#8
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,851	Re: Saginaw 3 speed to Transfer Case Adapter I knew the 3spd was standard but never saw a 3spd K/20. I had a 3spd '71 K/10 with NP205 but never had that apart. The 3spd K/5s coupled to a small transfer case, maybe a Dana 20? __________________ "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 ~

11-08-2022, 09:25 PM	#9
mi396ss Registered User Join Date: Oct 2008 Location: U.P., Michigan Posts: 66	That’s what this is, 1972 K10 with 3 speed backed by NP 205. Posted via Mobile Device

11-09-2022, 09:46 AM	#10
my04 Senior Member Join Date: Feb 2016 Location: Muskegon, MI Posts: 342	Re: Saginaw 3 speed to Transfer Case Adapter '72 k10 SWB 400sbc 3 speed Muncie I remember having the same issues as you are. The adapter is a tight fit and the bolts will draw it in if you tighten them evenly, a little antisieze helps too. It's actually a very heavy duty transmission except I hate the non syncronous 1st gear. Attached Images __________________ 1966 Custom Camper -327, 3OTT 1968 Chevrolet K20 - 350, 4 speed 1972 K10 SWB - 400, 3OTT 2003 Corvette Z06 - LS6 350, 405HP 2004 Tahoe LT 2015 Silverado 2500HD - 6.0L V8

11-09-2022, 06:00 PM	#11
mi396ss Registered User Join Date: Oct 2008 Location: U.P., Michigan Posts: 66	That’s it. Ok, thanks. I’ll try using the bolts to get it back together. Any idea what it’s worth? Posted via Mobile Device

11-09-2022, 08:30 PM	#12
my04 Senior Member Join Date: Feb 2016 Location: Muskegon, MI Posts: 342	Re: Saginaw 3 speed to Transfer Case Adapter Parts for these aren't easy to find, it doesn't neccesarily mean its rare or valuable but you don't come across these trannys everyday either. I do keep an eye out for them just to have as a spare. My guess or hope would be under a $100. __________________ 1966 Custom Camper -327, 3OTT 1968 Chevrolet K20 - 350, 4 speed 1972 K10 SWB - 400, 3OTT 2003 Corvette Z06 - LS6 350, 405HP 2004 Tahoe LT 2015 Silverado 2500HD - 6.0L V8

11-09-2022, 08:46 PM	#13
mi396ss Registered User Join Date: Oct 2008 Location: U.P., Michigan Posts: 66	Ok thanks. Posted via Mobile Device

11-10-2022, 09:20 PM	#14
57taskforce All about them K’s Join Date: Jun 2014 Location: Land of Entrapment Posts: 6,503	Re: Saginaw 3 speed to Transfer Case Adapter Thanks for posting pics up! My dad had a 71 K10 30+ years ago that had the same setup, before he swapped a 465 in it. You don’t see them very often in the K trucks. __________________ Tyler '57 3100 http://67-72chevytrucks.com/vboard/s...d.php?t=813888 '72 K20 Cheyenne: 5” lift, 35’s, front dana 60 blah blah blah… http://67-72chevytrucks.com/vboard/s...d.php?t=662879 ‘69 K10 SWB: 4” lift 33”s… in a million pieces http://67-72chevytrucks.com/vboard/s...d.php?t=805206 '98 Silverado LT K2500HD ECLB Vortec 454/4l80E: 6" lift 35x12.5x20’s



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