73-77 Blazer Front Drive Shaft Compatability - The 1947 - Present Chevrolet & GMC Truck Message Board Network

cysko9 · 12-09-2015, 01:12 AM

Now that I've sorted out which tailgates fit my 73 blazer. I need some help with the front driveshaft.

The LMC catalog shows 2 different front driveshafts (one with a u-joint tip and the other with a flange). Supposedly, the 73 requires the u-joint version. I've hard a heck of a time finding a used one but don't want to shell out $320 for a new one. There's a ton of the flanged shafts around so is it possible to just pop off the flange and mount it without it?

The blazer is bone stock as best I can tell and has full time 4x4.

Here's the page from the LMC catalog:

http://www.lmctruck.com/icatalog/csb/full.aspx?Page=153

bmchevy1979 · 12-10-2015, 02:23 AM

No they are different lengths but if you can't find them without it get the flange for your transfer case.

v30crewcab · 12-11-2015, 10:43 PM

a jeep xj front driveshaft is the same style, but don't know if the length is compatable or not. those take 1310 joints, and the big round style is 1330.

cysko9 · 12-11-2015, 11:31 PM

What do I need to search for to convert the transfer case to the flange style output?

bmchevy1979 · 12-12-2015, 12:49 PM

You just need the flange off the output it's just replaces the old yoke then you need a driveline that matches.I can't say whether the xj part will interchange or not but the early 70s squarebody 1/2 tons use a 1310 u-joint it would be a matter of length and if the cv joint will bolt up the same

v30crewcab · 12-13-2015, 10:42 PM

just saw a 77 in the yard today with a 203, and the flange. just need to find a setup off one of those and you're good.

El Dorado Jim · 12-22-2015, 02:16 AM

some front output shafts are fine splined and some are coarse, like 10 spline or around there, not sure, , you will need to pull yours off and see what splines you have, then find a flanged one with the same splines.I have had to do this.

12-09-2015, 01:12 AM	#1
cysko9 MI '69 Join Date: Oct 2004 Location: Michigan Posts: 314	73-77 Blazer Front Drive Shaft Compatability Now that I've sorted out which tailgates fit my 73 blazer. I need some help with the front driveshaft. The LMC catalog shows 2 different front driveshafts (one with a u-joint tip and the other with a flange). Supposedly, the 73 requires the u-joint version. I've hard a heck of a time finding a used one but don't want to shell out $320 for a new one. There's a ton of the flanged shafts around so is it possible to just pop off the flange and mount it without it? The blazer is bone stock as best I can tell and has full time 4x4. Here's the page from the LMC catalog: http://www.lmctruck.com/icatalog/csb/full.aspx?Page=153 __________________ 1967 Chevy (Project Frankenstein) 1973 K5 Blazer

12-10-2015, 02:23 AM	#2
bmchevy1979 Registered User Join Date: Dec 2010 Location: Visalia, Ca Posts: 707	Re: 73-77 Blazer Front Drive Shaft Compatability No they are different lengths but if you can't find them without it get the flange for your transfer case. __________________ <Brandon> 1974 Chevrolet K5 Blazer 350sbc/SM465/NP205, dana44 front, corp 14bolt rear with 4.10s and a powertrax locker, custom rear bumper 400sbc in the works. 1981 GMC C1500 stepside 250i6, 3spd, 12bolt with 3.08s 2.5/4drop on 15x10 with 275/50r15 81 GMC C3500 cab-chassis dually with utility bed 350sbc, Sm465, 14bolt with 4.10s nv4500 getting ready to go in 1979 Chevrolet K5 R.I.P. http://67-72chevytrucks.com/vboard/s...d.php?t=434096 1976 Chevrolet C10 R.I.P. http://67-72chevytrucks.com/vboard/s...d.php?t=434195

12-11-2015, 10:43 PM	#3
v30crewcab Registered User Join Date: Apr 2012 Location: Chatt Tn Posts: 978	Re: 73-77 Blazer Front Drive Shaft Compatability a jeep xj front driveshaft is the same style, but don't know if the length is compatable or not. those take 1310 joints, and the big round style is 1330. __________________ 88 military v30 crewcab shortbed 5.9 cummins, nv4500, 205 86 k30, 89 diesel burb, 76 gmc pathfinder 71 longbed 5.3 4l80 http://67-72chevytrucks.com/vboard/s...d.php?t=522535

12-11-2015, 11:31 PM	#4
cysko9 MI '69 Join Date: Oct 2004 Location: Michigan Posts: 314	Re: 73-77 Blazer Front Drive Shaft Compatability What do I need to search for to convert the transfer case to the flange style output? __________________ 1967 Chevy (Project Frankenstein) 1973 K5 Blazer

12-12-2015, 12:49 PM	#5
bmchevy1979 Registered User Join Date: Dec 2010 Location: Visalia, Ca Posts: 707	Re: 73-77 Blazer Front Drive Shaft Compatability You just need the flange off the output it's just replaces the old yoke then you need a driveline that matches.I can't say whether the xj part will interchange or not but the early 70s squarebody 1/2 tons use a 1310 u-joint it would be a matter of length and if the cv joint will bolt up the same __________________ <Brandon> 1974 Chevrolet K5 Blazer 350sbc/SM465/NP205, dana44 front, corp 14bolt rear with 4.10s and a powertrax locker, custom rear bumper 400sbc in the works. 1981 GMC C1500 stepside 250i6, 3spd, 12bolt with 3.08s 2.5/4drop on 15x10 with 275/50r15 81 GMC C3500 cab-chassis dually with utility bed 350sbc, Sm465, 14bolt with 4.10s nv4500 getting ready to go in 1979 Chevrolet K5 R.I.P. http://67-72chevytrucks.com/vboard/s...d.php?t=434096 1976 Chevrolet C10 R.I.P. http://67-72chevytrucks.com/vboard/s...d.php?t=434195

12-13-2015, 10:42 PM	#6
v30crewcab Registered User Join Date: Apr 2012 Location: Chatt Tn Posts: 978	Re: 73-77 Blazer Front Drive Shaft Compatability just saw a 77 in the yard today with a 203, and the flange. just need to find a setup off one of those and you're good. __________________ 88 military v30 crewcab shortbed 5.9 cummins, nv4500, 205 86 k30, 89 diesel burb, 76 gmc pathfinder 71 longbed 5.3 4l80 http://67-72chevytrucks.com/vboard/s...d.php?t=522535

12-22-2015, 02:16 AM	#7
El Dorado Jim Registered User Join Date: Dec 2009 Location: El Dorado Ca Posts: 3,374	Re: 73-77 Blazer Front Drive Shaft Compatability some front output shafts are fine splined and some are coarse, like 10 spline or around there, not sure, , you will need to pull yours off and see what splines you have, then find a flanged one with the same splines.I have had to do this.



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