Anyone else have a Blazer Dana20? - Pirate4x4.Com : 4x4 and Off-Road Forum

ManglerYJ · 10-24-2001, 08:21 PM

Apparently, during the early 70's, Chevy used a Dana20 in some of the full size Blazers, and I just so happen to have one. I thought it was a Jeep Dana20 based on the exterior of the case, but after having to rebuild it, I found that it has a VERY unique bolt pattern up front. The bolt pattern sort of looks like Santa's face instead of the usual "Texas" pattern.

Anyone have any info on these? Is this bolt pattern the same as any other transfer case? What years did they use the Dana20? The previous owner of my SM465/ Dana20 combo didn't know what year it was out of, and just assumed 73. Sounded viable to me, so I assume 73, but I'd love to know for sure.

Thanks!

u2slow · 10-24-2001, 08:51 PM

I think the only SM465/D20 combo was 69-70 Blazer and Jimmy. The Dana 20 was used until 75 I believe, but only with a 3 speed manual.

I'd love to have a picture of one for reference <IMG SRC="smilies/eyemouth.gif" border="0">

Leader · 10-25-2001, 06:52 AM

New to me!! I've never seen a 20 in a chevy!! Course, I've never seen a 465-203 together either!!! I'll shut up now!!

Grim Reaper · 10-25-2001, 07:19 AM

Quote:

Originally posted by u2slow:
I think the only SM465/D20 combo was 69-70 Blazer and Jimmy. The Dana 20 was used until 75 I believe, but only with a 3 speed manual.

I'd love to have a picture of one for reference <IMG SRC="smilies/eyemouth.gif" border="0">

I don't think they even ran the 20 past 72. I pretty sure 71-72 only got the 20 behind the Saginaw 3 speed case. It would be the bottom of the line truck.
Find a picture of a 205 case for a 465 and see if it is the same bolt pattern assuming you have tha adaptor.

pcorssmit · 10-25-2001, 08:26 PM

Hey Grim, do you know if they (D20s) ever came with the autos (TH 350)? We've got something funny going on with my brother's '70.

Pete

u2slow · 10-25-2001, 08:59 PM

Here's one rendition of the t-case availability in 1st Gen K5's:
http://www.geocities.com/Baja/Trails...nniversary.htm

... and for another
http://coloradok5.com/specs.shtml

Black Dog · 10-26-2001, 06:29 AM

I am almost sure that someone posted on one of the 1st gen. boards that they had a stock 1st. gen with a Dana 20 behind a TH350. On the other hand, I have brochures from 1970 and 1972, and they list the Dana 20 with the three speed manual only. I know for a fact that some Dana 20s were used behind SM465s, and the brochure doesn't show that combo either, unless it was 1969 only - don't have that brochure handy. Maybe they installed the wrong cross member in your brother's truck at the factory - seems like that could have happened pretty easily. I have had the two sitting side by side, and it is very hard to tell the difference without measuring the drop. BTW, I am Blazer1970 at CK5, and I still didn't remember to measure mine - weather here in MI has not been conducive to being outside the last couple of days!

[ 10-26-2001: Message edited by: Black Dog ]

Grim Reaper · 10-26-2001, 10:05 AM

Quote:

Originally posted by pcorssmit:
Hey Grim, do you know if they (D20s) ever came with the autos (TH 350)? We've got something funny going on with my brother's '70.

Pete

Well all you need to fit any case to any trans is the right adapters and sometimes the output shaft. It's totaly possible but I'm not real up on my 69-72's. I have a bud with a 72 that came with one factory and had a Saginaw with three on the tree. He swapped it out for a Built 700r and a 208 several years back. Every 70-72 K5 with the TH350 I have seen had a 205. That doesn't mean it wasn't available. I have never seen a 203 behind a 465 with my own eyes but they are out there.

MaxCrack · 10-26-2001, 01:05 PM

Quote:

Originally posted by Leader:
New to me!! I've never seen a 20 in a chevy!! Course, I've never seen a 465-203 together either!!! I'll shut up now!!

I have...and it's in my truck. Can't wait till I get my doubler...heheh
<IMG SRC="smilies/rasta.gif" border="0">

odee · 10-29-2001, 04:19 AM

I see the 350&400 20 combo had a friend that used to mud race and run these combos in his trucks. The 465/20 never,465/203 yes have got tranfer in parts collection.

FattyCBR · 10-29-2001, 06:00 AM

I actually just picked up an SM465 and D20 combo with the factory adapter. It's the coarse 10 spline output from the SM and 10 spline input on the Dana 20. No idea what it came out of originally. Supposedly it was out of a Jeep.

dodg partz 1t · 10-29-2001, 03:08 PM

believe i have a d20 out of a '72 blazer with a t350 ...... brother wrecked the rig near 20 yrs ago ...... somehow the case and top and one door hung around ...... let me know ...... located in norcal

pcorssmit · 10-29-2001, 07:44 PM

I've seen plenty of the 465/203s, once drove across town to go buy a 205 for $75 out of a '75, turned out to be a 203. Needles to say, I came home empty handed.

dodg partz 1t, I don't need one (350/20), just trying to figure out a weird prob on the '70. If your peddling Dodge crew cab parts, you might try over on the TDR (www.turbodieselregister.com), some of those guys are into 4 dr conversions.

Pete

Cheepin · 10-29-2001, 08:17 PM

How strong are these 20s?Would it hold up to a 400SBwith a 465 in a CJ-5With 37"ers?What adapter does it use?Is it the same as the 205/465 or different?Thanks Blazin <IMG SRC="smilies/biggrin.gif" border="0"> <IMG SRC="smilies/usa.gif" border="0">

Jonathan M · 08-16-2002, 10:43 AM

How long is the adapter between the 465 and the dana 20? How do they mate together? What abotu teh dana 20 that is found behind the 3 speeds does it have the same input shaft as the dana 20 found behind the 465.

thx

jonscj7 · 08-16-2002, 09:57 PM

Quote:

Originally posted by the TJ kid
How long is the adapter between the 465 and the dana 20? How do they mate together

thx

The adapter is about the same as the 465 to 205 approx 7" The 465 to dana 20 uses the course 10 spline (as stated above) and uses a coupler sleeve just like the 465 to 205 so the adapter is similer in length. I have seen a few of the 465 to 20 combination and found that a regular jeep/scout 20 will bolt up but it just doen't use all the holes as in the santa face

Jon

10-24-2001, 08:21 PM	#1 (permalink)
ManglerYJ Registered User Join Date: Jul 2001 Member # 5744 Location: Ruffin, NC Posts: 336	Anyone else have a Blazer Dana20? Apparently, during the early 70's, Chevy used a Dana20 in some of the full size Blazers, and I just so happen to have one. I thought it was a Jeep Dana20 based on the exterior of the case, but after having to rebuild it, I found that it has a VERY unique bolt pattern up front. The bolt pattern sort of looks like Santa's face instead of the usual "Texas" pattern. Anyone have any info on these? Is this bolt pattern the same as any other transfer case? What years did they use the Dana20? The previous owner of my SM465/ Dana20 combo didn't know what year it was out of, and just assumed 73. Sounded viable to me, so I assume 73, but I'd love to know for sure. Thanks! __________________ 90 YJ with 305 TPI Chevy/ SM465/ Dana20, SOA on Scout Dana44's on 36x12.50 SX's with a Lock Right in the rear visit [url]www.carolinarockshop.com [/url] today, tell em Mangler sent ya!

10-24-2001, 08:51 PM	#2 (permalink)
u2slow Registered User Join Date: Apr 2001 Member # 4243 Location: Salt Spring Island, BC Posts: 3,068	I think the only SM465/D20 combo was 69-70 Blazer and Jimmy. The Dana 20 was used until 75 I believe, but only with a 3 speed manual. I'd love to have a picture of one for reference <IMG SRC="smilies/eyemouth.gif" border="0"> __________________ 90-93 CTD jalopies

10-25-2001, 06:52 AM	#3 (permalink)
Leader Registered User Join Date: Jun 2001 Member # 5091 Location: Decatur TX. Posts: 51	New to me!! I've never seen a 20 in a chevy!! Course, I've never seen a 465-203 together either!!! I'll shut up now!! __________________ It's as close to a 1ton as you can get and still look like a jeep!!

10-25-2001, 08:26 PM	#5 (permalink)
pcorssmit Rock God Join Date: May 2001 Member # 4406 Location: Denver Posts: 2,335	Hey Grim, do you know if they (D20s) ever came with the autos (TH 350)? We've got something funny going on with my brother's '70. Pete __________________ Life should not be a journey to the grave with the intention of arriving safely in an attractive and well preserved body, but rather to skid in sideways , beer in hand, body thoroughly used up, totally worn out and screaming "WOW, what a ride."

10-25-2001, 08:59 PM	#6 (permalink)
u2slow Registered User Join Date: Apr 2001 Member # 4243 Location: Salt Spring Island, BC Posts: 3,068	Here's one rendition of the t-case availability in 1st Gen K5's: http://www.geocities.com/Baja/Trails...nniversary.htm ... and for another http://coloradok5.com/specs.shtml __________________ 90-93 CTD jalopies

10-26-2001, 06:29 AM	#7 (permalink)
Black Dog Registered User Join Date: Apr 2001 Member # 4140 Location: is everything Posts: 1,010	I am almost sure that someone posted on one of the 1st gen. boards that they had a stock 1st. gen with a Dana 20 behind a TH350. On the other hand, I have brochures from 1970 and 1972, and they list the Dana 20 with the three speed manual only. I know for a fact that some Dana 20s were used behind SM465s, and the brochure doesn't show that combo either, unless it was 1969 only - don't have that brochure handy. Maybe they installed the wrong cross member in your brother's truck at the factory - seems like that could have happened pretty easily. I have had the two sitting side by side, and it is very hard to tell the difference without measuring the drop. BTW, I am Blazer1970 at CK5, and I still didn't remember to measure mine - weather here in MI has not been conducive to being outside the last couple of days! [ 10-26-2001: Message edited by: Black Dog ] __________________ Tim There is no accounting for taste 1936, 1937, 1943, 1950, 1952, 1954, 1955, 1997, 1998, 2002, [B][COLOR="Red"]2008[/COLOR][/B].

10-29-2001, 04:19 AM	#10 (permalink)
odee Registered User Join Date: Apr 2000 Member # 613 Location: Big Stone Gap, VA., USA Posts: 865	I see the 350&400 20 combo had a friend that used to mud race and run these combos in his trucks. The 465/20 never,465/203 yes have got tranfer in parts collection.

10-29-2001, 06:00 AM	#11 (permalink)
FattyCBR Registered User Join Date: Jul 2001 Member # 5666 Location: Knoxville, TN Posts: 313	I actually just picked up an SM465 and D20 combo with the factory adapter. It's the coarse 10 spline output from the SM and 10 spline input on the Dana 20. No idea what it came out of originally. Supposedly it was out of a Jeep. __________________ Milan Red, white, and blue. Everyone needs something to believe in. . . So I believe I'll have another beer.

10-29-2001, 03:08 PM	#12 (permalink)
dodg partz 1t Registered User Join Date: Jul 2001 Member # 6117 Location: 1/2 way to p'vll from p'pines Posts: 71	believe i have a d20 out of a '72 blazer with a t350 ...... brother wrecked the rig near 20 yrs ago ...... somehow the case and top and one door hung around ...... let me know ...... located in norcal __________________ ..... neeed parts for dodges ???? ..... how about [b]d60's[/b] ++++ !!!!! ...... [b]crew cabs[/b] anyone ????

10-29-2001, 07:44 PM	#13 (permalink)
pcorssmit Rock God Join Date: May 2001 Member # 4406 Location: Denver Posts: 2,335	I've seen plenty of the 465/203s, once drove across town to go buy a 205 for $75 out of a '75, turned out to be a 203. Needles to say, I came home empty handed. dodg partz 1t, I don't need one (350/20), just trying to figure out a weird prob on the '70. If your peddling Dodge crew cab parts, you might try over on the TDR (www.turbodieselregister.com), some of those guys are into 4 dr conversions. Pete

10-29-2001, 08:17 PM	#14 (permalink)
Cheepin Registered User Join Date: Sep 2000 Member # 1792 Location: Parachute,CO Posts: 2,361	How strong are these 20s?Would it hold up to a 400SBwith a 465 in a CJ-5With 37"ers?What adapter does it use?Is it the same as the 205/465 or different?Thanks Blazin <IMG SRC="smilies/biggrin.gif" border="0"> <IMG SRC="smilies/usa.gif" border="0"> __________________ CJJuggy.FI406/465/205/D60/14bolt FF on 39.5 Swampers.Kids 70Jeepster fullwidth on 34/9.50 swampers.

08-16-2002, 10:43 AM	#15 (permalink)
Jonathan M Registered User Join Date: Jun 2001 Member # 5393 Location: Canada Posts: 137	How long is the adapter between the 465 and the dana 20? How do they mate together? What abotu teh dana 20 that is found behind the 3 speeds does it have the same input shaft as the dana 20 found behind the 465. thx __________________ 89 YJ in pieces............42's w/ rockstomper beadlocks, CJ front clip & dash, 60/14, 350 with GM TBI, RV cam, and 305 heads 700R4, dana 300, F-150 springs on all 4 corners and 105" wheelbase......

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode