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Old 12-09-2015, 01:12 AM   #1
cysko9
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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
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Old 12-10-2015, 02:23 AM   #2
bmchevy1979
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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.
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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
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Old 12-11-2015, 10:43 PM   #3
v30crewcab
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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.
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Old 12-11-2015, 11:31 PM   #4
cysko9
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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?
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Old 12-12-2015, 12:49 PM   #5
bmchevy1979
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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
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<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
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Old 12-13-2015, 10:42 PM   #6
v30crewcab
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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.
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Old 12-22-2015, 02:16 AM   #7
El Dorado Jim
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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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