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#1 |
Rottenwood Garage Member
Join Date: May 2005
Location: Marietta, Georgia
Posts: 4,321
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Tranny/transfer case question on the 3 speed Blazer
While the 1968 dually project is off to paint and body, I am going to start on the 1972 Blazer. Im sure this is covered in here somewhere but I am going to ask it anyway.
Its currently a 3 speed that "Billy Bob" converted to a floor shifter. I want to convert it to an automatic. I know i will need a different bell housing but can I use the same transfer case???? What do I do? I have also given thought to going with a 4 or 5 speed......what can I use?
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2004 Chevrolet Suburban C1500 2001 Chevrolet 2500HD Crew 6.0 1999 Harley Davidson Electra Glide 1972 Chevrolet C-20 Custom Camper "Dump Truck" 1972 Chevrolet C-20 Suburban "Big Green" 1969 Chevrolet C-50 Wedge Hauler "Leonidis" 1966 C-10 2x4 short fleet 327 4 speed "Race Truck" 1952 Plymouth Cranbrook "Rican" (my grandfathers) 1931 Ford Model A Coupe "Black Beauty" 1930 Ford Model A truck "Club Cab" 4x4 Rottenwood Garage and Speed Shop.....where everything must be racy! It's not just a hobby..It's a LIFESTYLE!!! Thanks for nothing Barrett-Jackson You cant fix stupid or teach accountability! Time wasters, looky Lous and tire kickers are everywhere! |
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#2 |
Registered User
Join Date: Dec 1999
Location: Old Mission, MI, USA
Posts: 2,510
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Re: Tranny/transfer case question on the 3 speed Blazer
Chances are that you have a Dana 20 t-case now with the three speed. That case will not work with an automatic. Your best bet would be to find a TH350/NP205 combo with the adapter. Actually better yet and often cheaper would be to find an entire '70 - '72 truck with the tranny that you want and start swapping parts. That way you have the steering column, crossmember and a hundred other parts that you will need for the swap.
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Tim |
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#3 | |
Always on the hunt...
![]() Join Date: Sep 2006
Location: Portland, OR.
Posts: 5,604
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Re: Tranny/transfer case question on the 3 speed Blazer
Quote:
![]() ![]() As a side note: I just converted a very clean & original one owner 71 K/5 with 87K original miles from the Saginaw/Dana20 combo to a Th400/Np205 so I have all the just removed oe manual parts (stored inside heated shop) available if anyone is interested in putting their K/5 back to original with this type setup. I have the trans & transfer still bolted together including case shifter and mounting parts, the bellhousing, flywheel/pressure plate/release fork, the manual pedal set, clutch linkage, a super nice & tight 3 on the tree column, both shift links and both front & rear blazer drivelines, to be sold as a complete package only. All parts in great working condition and were only removed for the reason of owner getting tired of shifting a manual, I can take some pics if anyone is interested. Lmk... |
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#4 |
computer illiterate
Join Date: Jan 2001
Location: Des Moines, IA
Posts: 6,446
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Re: Tranny/transfer case question on the 3 speed Blazer
i have a 72 swb 3spd with an np205 combo i bought from the origional owner so they where available
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72 2wd blazer 72 swb 4x4 |
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#5 |
Registered User
Join Date: Dec 1999
Location: Old Mission, MI, USA
Posts: 2,510
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Re: Tranny/transfer case question on the 3 speed Blazer
In a pickup truck, yes. A Blazer came with a Dana 20 behind the three speed.
__________________
Tim |
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#6 |
computer illiterate
Join Date: Jan 2001
Location: Des Moines, IA
Posts: 6,446
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Re: Tranny/transfer case question on the 3 speed Blazer
gm used many applications. how do you know for sure a np205 didnt come in the blazer behind a 3spd?
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72 2wd blazer 72 swb 4x4 |
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#7 |
Special Order
![]() ![]() Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,859
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Re: Tranny/transfer case question on the 3 speed Blazer
I`m pretty sure the Blazers used the Dana20,where the Suburbans and pickups used NP205s.
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"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 ~ |
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#8 |
Registered User
Join Date: Jan 2007
Location: Mississippi
Posts: 2,121
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Re: Tranny/transfer case question on the 3 speed Blazer
I see that Classic Bowties said "The 205 shifter also comes through the trans hump cover in a different spot than the Dana 20..."
So that got me to thinking... I have always thought my Blazer had a 205. However, I've noticed that my transfer shifter is on the driver's side of the the manual stick. While alot of other trucks I see, have it coming out on the pass side of the hump. (My blazer originally had a 3 on the tree, but a PO converted it to 4 in the floor - granny low +3) ![]()
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'72 C to K20 "Cannibalizer" http://67-72chevytrucks.com/vboard/s...32#post8653432 '85 K30 "Big Nassy" '01 2500 Suburban ...party wagon & tow truck '06 Silverado SS...DD '06 C1500 WT...DD '07 Classic C1500 WT...DD Built & sold cause can't keep 'em all: '72 Blazer "The Bucket" http://67-72chevytrucks.com/vboard/s...d.php?t=433190 '55 Chevy straight axle gasser https://www.trifive.com/forums/showthread.php?t=173938 '69 Pro Street Chevelle http://www.chevelles.com/forums/showthread.php?t=332541 '86 M1031 CUCV http://67-72chevytrucks.com/vboard/s...d.php?t=553619 |
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#9 | |
Registered User
Join Date: Dec 1999
Location: Old Mission, MI, USA
Posts: 2,510
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Re: Tranny/transfer case question on the 3 speed Blazer
Quote:
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Tim |
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