I lifted the hood on the Blazer . . . - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Yukon Jack** · 11-08-2006, 12:47 PM

About time for a little updated I would say. Free time has been next to impossible to find for the last few months but got out to the shop the last two nights and got the pinion angle dialed in on the 14 bolt I'm swapping in. Monday night I got it close and got the measurement for the rear driveshaft. Took it in Tuesday for new u-joints, including change to a conversion u-joint for the 14 bolt I'm putting in, lengthening, and balancing of the finished driveshaft.

Went out last night and dropped the rear pinion down a touch, took more measurements and got the angles finalized. Now I need to mark where the shock tabs need to be and then pull the 14 bolt back out and run it over to a buddy's to have the tabs and spring perches welded on. When I get the axle back I will then install the Detroit locker and then I can reinstall and get the brake lines modified and connected.

A little progress, but I will take all I can get!

Oh, after I got that done last night I cracked open three cardboard boxes containing a new three piece rolling tool chest - I've been wanting one of those forever and Sears had a sale on their QuietGlide series chests that I just couldn't pass up. Got the intermediate draw chest for free. It should fit my needs very well.

**Yukon Jack** · 11-09-2006, 12:06 PM

Got out again last night, that makes 3 nights in a row - that doesn't happen very often these days!

Got the rear axle pulled back out and now it is ready to go to my buddy's for spring perch welding - maybe get that done this weekend. Had to take the driveshaft back to get a different u-joint for up front. It needed a conversion u-joint like used on the rear that makes me guess that the NP205 that I'm using must have come from a 1 ton for it to need a 1350 u-joint. At least I didn't think that they usually used that large of a u-joint. Not sure.

Also had some clearance issues with the grease zert on the axle side of the driveshaft. The changed the position so now I will need to see if it will work correctly and still be able to get the grease gun on it.

Sure is nice to be making some progress!

Here's the driveshaft

And here is the 14 bolt with the spring perches dialed in

And, of course I have to show off my new tool chest

70rs/ss · 11-09-2006, 02:23 PM

Nice work, how are you relocating the perch locator? I have seen several of these and the tires seem to be too far back for the front and too far forward on the rear, have heard some say zero rate will fix it, my question is how? I have a 72 with 1/2 ton under it and I am sitting on the fence about 2wd'ing it or the 3/4 ton drivetrain I have, one ofr the other. Any help or advice would be great, cause if I lift and 3/4 ton it I want it to look correct.

**Yukon Jack** · 11-09-2006, 02:36 PM

Here is how the Blazer looked before relocating the holes - this is with the 14 bolt in place with the 2" lift block and the spring perches that I made that are a bit taller than stock.

It doesn't look like I have a picture showing how it looks now - will have to snap one when I get the axle back under the K5.

**Yukon Jack** · 11-10-2006, 10:26 AM

Got out for the 4th night in a row - on a roll for sure. Found all these spiders in my shop last night

[IMG]http://yukon.b0xen.us0njack.com
Having a little trouble identifying their species but the good thing is they are now out making way for the Detroit locker for the 14 bolt going into my 70 K5.

Everything I read said the swap was pretty easy and that is definitely true - the hardest part so far has been getting the ring gear bolts torqued to 120 ft/lbs - having a hard time using my vise to secure the carrier to allow me to torque the bolts enough.

I asked this question in the 4x4 section but will throw it out here also:

Does anyone know if I need to use any sealant on the 8 bolts that the hold the axle shafts to the hub? When I pulled those bolts they seemed to have something on them and there was a little blue RTV visible on the back side of the axle flange when I pulled the axles away from the hubs.

The materials I read about installing the locker didn't mention using any sealant in that area.

11-08-2006, 12:47 PM	#1
Yukon Jack Post Whore Join Date: Feb 2000 Location: Rose Hill, KS, USA Posts: 12,689	Re: I lifted the hood on the Blazer . . . About time for a little updated I would say. Free time has been next to impossible to find for the last few months but got out to the shop the last two nights and got the pinion angle dialed in on the 14 bolt I'm swapping in. Monday night I got it close and got the measurement for the rear driveshaft. Took it in Tuesday for new u-joints, including change to a conversion u-joint for the 14 bolt I'm putting in, lengthening, and balancing of the finished driveshaft. Went out last night and dropped the rear pinion down a touch, took more measurements and got the angles finalized. Now I need to mark where the shock tabs need to be and then pull the 14 bolt back out and run it over to a buddy's to have the tabs and spring perches welded on. When I get the axle back I will then install the Detroit locker and then I can reinstall and get the brake lines modified and connected. A little progress, but I will take all I can get! Oh, after I got that done last night I cracked open three cardboard boxes containing a new three piece rolling tool chest - I've been wanting one of those forever and Sears had a sale on their QuietGlide series chests that I just couldn't pass up. Got the intermediate draw chest for free. It should fit my needs very well. __________________ 1970 Blazer with a 400 sbc and 4" lift 1980 Pontiac Trans Am, 455 Oldsmobile 2012 Kawasaki Concours 14

11-09-2006, 12:06 PM	#2
Yukon Jack Post Whore Join Date: Feb 2000 Location: Rose Hill, KS, USA Posts: 12,689	Re: I lifted the hood on the Blazer . . . Got out again last night, that makes 3 nights in a row - that doesn't happen very often these days! Got the rear axle pulled back out and now it is ready to go to my buddy's for spring perch welding - maybe get that done this weekend. Had to take the driveshaft back to get a different u-joint for up front. It needed a conversion u-joint like used on the rear that makes me guess that the NP205 that I'm using must have come from a 1 ton for it to need a 1350 u-joint. At least I didn't think that they usually used that large of a u-joint. Not sure. Also had some clearance issues with the grease zert on the axle side of the driveshaft. The changed the position so now I will need to see if it will work correctly and still be able to get the grease gun on it. Sure is nice to be making some progress! Here's the driveshaft And here is the 14 bolt with the spring perches dialed in And, of course I have to show off my new tool chest __________________ 1970 Blazer with a 400 sbc and 4" lift 1980 Pontiac Trans Am, 455 Oldsmobile 2012 Kawasaki Concours 14 Last edited by Yukon Jack; 08-22-2009 at 04:23 PM.

11-09-2006, 02:23 PM	#3
70rs/ss Registered User Join Date: Dec 2004 Location: Northern AZ Posts: 7,270	Re: I lifted the hood on the Blazer . . . Nice work, how are you relocating the perch locator? I have seen several of these and the tires seem to be too far back for the front and too far forward on the rear, have heard some say zero rate will fix it, my question is how? I have a 72 with 1/2 ton under it and I am sitting on the fence about 2wd'ing it or the 3/4 ton drivetrain I have, one ofr the other. Any help or advice would be great, cause if I lift and 3/4 ton it I want it to look correct.

11-09-2006, 02:36 PM	#4
Yukon Jack Post Whore Join Date: Feb 2000 Location: Rose Hill, KS, USA Posts: 12,689	Re: I lifted the hood on the Blazer . . . Here is how the Blazer looked before relocating the holes - this is with the 14 bolt in place with the 2" lift block and the spring perches that I made that are a bit taller than stock. It doesn't look like I have a picture showing how it looks now - will have to snap one when I get the axle back under the K5. __________________ 1970 Blazer with a 400 sbc and 4" lift 1980 Pontiac Trans Am, 455 Oldsmobile 2012 Kawasaki Concours 14 Last edited by Yukon Jack; 08-22-2009 at 04:23 PM.

11-10-2006, 10:26 AM	#5
Yukon Jack Post Whore Join Date: Feb 2000 Location: Rose Hill, KS, USA Posts: 12,689	Re: I lifted the hood on the Blazer . . . Got out for the 4th night in a row - on a roll for sure. Found all these spiders in my shop last night [IMG]http://yukon.b0xen.us0njack.com Having a little trouble identifying their species but the good thing is they are now out making way for the Detroit locker for the 14 bolt going into my 70 K5. Everything I read said the swap was pretty easy and that is definitely true - the hardest part so far has been getting the ring gear bolts torqued to 120 ft/lbs - having a hard time using my vise to secure the carrier to allow me to torque the bolts enough. I asked this question in the 4x4 section but will throw it out here also: Does anyone know if I need to use any sealant on the 8 bolts that the hold the axle shafts to the hub? When I pulled those bolts they seemed to have something on them and there was a little blue RTV visible on the back side of the axle flange when I pulled the axles away from the hubs. The materials I read about installing the locker didn't mention using any sealant in that area. __________________ 1970 Blazer with a 400 sbc and 4" lift 1980 Pontiac Trans Am, 455 Oldsmobile 2012 Kawasaki Concours 14 Last edited by Yukon Jack; 08-22-2009 at 04:23 PM.



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