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Old 02-10-2018, 04:03 PM   #1
rsavage
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SM465 and Dana 20 Oddities

My 69 Blazer came with a SM465 mated to a Dana 20 transfer case. While the Tub and frame are at the body shop, I have been refurbing and buying parts so when it returns, I can start putting it back together. Couple of things I've learned from both observation and talking with a tech at Novak 4X4.
The adapter is very rare and GM only. They only made under 5000 '69's and Dana and Rockwell TC's were used (not sure if NP's were available in 1968-9 when the first year was being built. Thousands upon thousands of Dana 20's were used in Jeeps, but adapters are different. Jeep seal and gasket kits will work except for the adapter to transmission - you have to make that one.
The shifter for the transfer case bolts to the adapter and is connected to the shift rods on the transfer case. The shifter actually moves side to side - drivers' side and back to put it in 2HI for example - again a very rare piece. (see restored shifter ring photo) The 465, after scraping 50 years of grease off was painted red oxide. The adapter was either bare or flat black - still looking for vestiges. The transmission has XA stenciled on both sides.
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65 GTO 389, tripower 4 spd PS PB AM/FM, Posi PHS - given to my son in NC 4/18
70 GTO convertible numbers matching 400, 4 speed
65 Fairlane hipo 4 speed. One of 750 hipos made in 65
69 Blazer 4 WD. Latest restoration project
2018 Durango 392 Hemi SRT 0-60 4.4 sec, 12.9 1/4 mile
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Old 02-10-2018, 04:09 PM   #2
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Re: SM465 and Dana 20 Oddities

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65 GTO 389, tripower 4 spd PS PB AM/FM, Posi PHS - given to my son in NC 4/18
70 GTO convertible numbers matching 400, 4 speed
65 Fairlane hipo 4 speed. One of 750 hipos made in 65
69 Blazer 4 WD. Latest restoration project
2018 Durango 392 Hemi SRT 0-60 4.4 sec, 12.9 1/4 mile
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Old 02-10-2018, 04:13 PM   #3
rsavage
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Re: SM465 and Dana 20 Oddities

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65 GTO 389, tripower 4 spd PS PB AM/FM, Posi PHS - given to my son in NC 4/18
70 GTO convertible numbers matching 400, 4 speed
65 Fairlane hipo 4 speed. One of 750 hipos made in 65
69 Blazer 4 WD. Latest restoration project
2018 Durango 392 Hemi SRT 0-60 4.4 sec, 12.9 1/4 mile
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Old 02-10-2018, 06:23 PM   #4
toomany2yz
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Re: SM465 and Dana 20 Oddities

That looks really good!

Mine came with a 465/20 in it. It's getting replaced with a 4500/241, but I'm hanging on the original parts still. Tried selling them a while back, but didn't get much interest localy for them. May try listing here next time.
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Old 02-10-2018, 06:42 PM   #5
rsavage
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Re: SM465 and Dana 20 Oddities

I'll be interested in seeing what you have to do to covert over.
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65 GTO 389, tripower 4 spd PS PB AM/FM, Posi PHS - given to my son in NC 4/18
70 GTO convertible numbers matching 400, 4 speed
65 Fairlane hipo 4 speed. One of 750 hipos made in 65
69 Blazer 4 WD. Latest restoration project
2018 Durango 392 Hemi SRT 0-60 4.4 sec, 12.9 1/4 mile
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Old 02-10-2018, 07:47 PM   #6
Tomo
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Re: SM465 and Dana 20 Oddities

Quote:
Originally Posted by toomany2yz View Post
That looks really good!

Mine came with a 465/20 in it. It's getting replaced with a 4500/241, but I'm hanging on the original parts still. Tried selling them a while back, but didn't get much interest localy for them. May try listing here next time.
Hey toomany Iím wanting to go with a 4500 241 too - Are you going to start a thread for your swap? Iím interested in following along.
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Old 02-11-2018, 10:01 PM   #7
K5_Knox
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Re: SM465 and Dana 20 Oddities

My 70 has the same setup.
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Old 02-12-2018, 10:20 AM   #8
rsavage
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Re: SM465 and Dana 20 Oddities

I wonder how many 69-70 Blazers were produced with the Dana 20? My 71 had a NP 205.
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65 GTO 389, tripower 4 spd PS PB AM/FM, Posi PHS - given to my son in NC 4/18
70 GTO convertible numbers matching 400, 4 speed
65 Fairlane hipo 4 speed. One of 750 hipos made in 65
69 Blazer 4 WD. Latest restoration project
2018 Durango 392 Hemi SRT 0-60 4.4 sec, 12.9 1/4 mile
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Old 02-12-2018, 02:20 PM   #9
cleszkie
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Re: SM465 and Dana 20 Oddities

Dana 20 cases came as either straight front to back shift pattern or what is known as the "J" shift pattern, which goes side to side and front to back. I have seen quite a few of the "J" pattern cases in early ford broncos and early jeeps, but not many in Blazers. The "J' cases were phased out in favor of the straight pattern cases.
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