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02-10-2018, 04:03 PM | #1 |
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Join Date: Aug 2009
Location: Alden NY
Posts: 2,705
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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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1961 C1 Corvette 1959 El Camino 350 TPI, 9" 4 w disc 69 Blazer K5 - sold July '20 2021 Durango RT 5.7 |
02-10-2018, 04:09 PM | #2 |
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Location: Alden NY
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Re: SM465 and Dana 20 Oddities
More Photos
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1961 C1 Corvette 1959 El Camino 350 TPI, 9" 4 w disc 69 Blazer K5 - sold July '20 2021 Durango RT 5.7 |
02-10-2018, 04:13 PM | #3 |
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Location: Alden NY
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Re: SM465 and Dana 20 Oddities
More photos
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1961 C1 Corvette 1959 El Camino 350 TPI, 9" 4 w disc 69 Blazer K5 - sold July '20 2021 Durango RT 5.7 |
02-10-2018, 06:23 PM | #4 |
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Join Date: Dec 2014
Location: Auburn
Posts: 57
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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. |
02-10-2018, 07:47 PM | #5 |
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Join Date: Apr 2016
Location: Indiana
Posts: 213
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Re: SM465 and Dana 20 Oddities
Hey toomany I’m wanting to go with a 4500 241 too - Are you going to start a thread for your swap? I’m interested in following along.
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02-10-2018, 06:42 PM | #6 |
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Join Date: Aug 2009
Location: Alden NY
Posts: 2,705
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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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1961 C1 Corvette 1959 El Camino 350 TPI, 9" 4 w disc 69 Blazer K5 - sold July '20 2021 Durango RT 5.7 |
02-11-2018, 10:01 PM | #7 |
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Join Date: Oct 2017
Location: Knoxville, tn
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Re: SM465 and Dana 20 Oddities
My 70 has the same setup.
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02-12-2018, 10:20 AM | #8 |
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Join Date: Aug 2009
Location: Alden NY
Posts: 2,705
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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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1961 C1 Corvette 1959 El Camino 350 TPI, 9" 4 w disc 69 Blazer K5 - sold July '20 2021 Durango RT 5.7 |
02-12-2018, 02:20 PM | #9 |
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Join Date: Feb 2003
Location: Santa Ana, CA
Posts: 2,191
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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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