how to fix my frame 72 jimmy 4x4 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

joemacho · 01-09-2008, 04:44 PM

well i checked my frame out were the powerstering gear box goes and is split where the bolts line up.and by the front leaf shackle is. wanted to know what is the best way to fix it.

70gmcjimmy · 01-09-2008, 06:04 PM

Hey joemacho, I assume you mean the power steering box, not pump.

If it is cracks, maybe welding, if the whole 3 bolt area is breaking out maybe a frame horn welded on but no one can really say without some pics.

Good luck---DAC

WORNBRAKES · 01-09-2008, 06:28 PM

I have seen stiffener plates inside the frame rails and I have seen the horn replaced. Pics will help.

joemacho · 01-09-2008, 06:53 PM

so how do i post pictures i have them.

bouncytruck · 01-09-2008, 07:04 PM

to post pics, click the "post reply" button below this posting. Then click the "manage attachments" button and select your photos.

There are stiffener plates made for the second gen trucks as this is a common problem. I believe some have adapted them to fit the first gen blazer frame or you can just weld in some heavy-duty stock. Check CK5.com to find a vendor that sells the second gen stiffener plates.

joemacho · 01-09-2008, 07:33 PM

heres is the picture i hope and thanks again bouncytruck

joemacho · 01-09-2008, 08:03 PM

heres another pic

vtblazer · 01-10-2008, 01:24 AM

Yep, there's trouble there...

Not a common problem on a 1st gen but being it's happened you gotta fix it.

Check out Off Road Design or DIY4x4, both great companies and products.

If there isn't a part already made, you could either replace the frame horn all together or make up some plates and weld em in.
OR, find another frame horn and make a plate using it. < (favorite choice IMO)

**Yukon Jack** · 01-10-2008, 05:15 AM

Ouch - never seen a first gen have a break like that one. Like mentioned above, that happens often on the later frames. Good luck with the repair.

bouncytruck · 01-10-2008, 05:51 AM

I'll agree, never seen that on a first gen. Might be a good time for a frame up rebuild. LUV has an incredibly nice rolling chassis he's thinking about selling.

MiniD · 01-10-2008, 05:52 AM

Mine was cracked in the exact location. This is usually the result of putting big tires on the rig and torque from the power steering box cracking the frame. There's a steering box patch kit that you can buy for extra support on the weld. It looks like you're may have already been repaired as you already have bolts in the core support bracket vs rivets. This would make the job MUCH easier.

I'd get this work done as soon as possible. You'd be amazed at how 1/16" of an inch of play right below your steering box will cause slop in your steering. Every time you turn the wheel it flexes there and 1/16" of an inch of flex (there) is about 1/8 of a turn on your steering wheel.

01-09-2008, 04:44 PM	#1
joemacho Registered User Join Date: Aug 2007 Location: peoria az Posts: 252	how to fix my frame 72 jimmy 4x4 well i checked my frame out were the powerstering gear box goes and is split where the bolts line up.and by the front leaf shackle is. wanted to know what is the best way to fix it. Last edited by joemacho; 01-09-2008 at 06:27 PM.

01-09-2008, 06:04 PM	#2
70gmcjimmy GMCDAC Join Date: Apr 2006 Location: Rapid City, SD Posts: 837	Re: how to fix my frame 72 jimmy 4x4 Hey joemacho, I assume you mean the power steering box, not pump. If it is cracks, maybe welding, if the whole 3 bolt area is breaking out maybe a frame horn welded on but no one can really say without some pics. Good luck---DAC __________________ 1970 GMC K5 Jimmy Custom 4X4 Mom's driver from 1971 to 2001!! Under rebuild! 1972 GMC C2500 Pickup owned since 1979 Needs a rest and refurbish! 1955 GMC 100 2nd design driven almost daily! Rest In Peace Mom. "Dolly" 7/15/23 - 5/18/09 GMC driver for 30 years! Last edited by 70gmcjimmy; 01-09-2008 at 06:06 PM.

01-09-2008, 06:28 PM	#3
WORNBRAKES Senior Member Join Date: Jul 2001 Location: Hughesville, MD Posts: 1,350	Re: how to fix my frame 72 jimmy 4x4 I have seen stiffener plates inside the frame rails and I have seen the horn replaced. Pics will help. __________________ Mario and Mandy Hughesville, MD 20637 69 C10 305/350 71 K5 Basket case 75 K10 Rescue Parting out 77 MG Midget Parting out 15 6.7L Cummins

01-09-2008, 06:53 PM	#4
joemacho Registered User Join Date: Aug 2007 Location: peoria az Posts: 252	Re: how to fix my frame 72 jimmy 4x4 so how do i post pictures i have them.

01-09-2008, 07:04 PM	#5
bouncytruck SKINNY TIRES RULE! Join Date: Sep 2001 Location: Bothell, WA Posts: 11,049	Re: how to fix my frame 72 jimmy 4x4 to post pics, click the "post reply" button below this posting. Then click the "manage attachments" button and select your photos. There are stiffener plates made for the second gen trucks as this is a common problem. I believe some have adapted them to fit the first gen blazer frame or you can just weld in some heavy-duty stock. Check CK5.com to find a vendor that sells the second gen stiffener plates. __________________ bouncytruck 1972 K5 The Hauler 1994 K1500 Suburban The Daily2010 Kia Soul Wife's Ride2014 Fiat 500L

01-09-2008, 07:33 PM	#6
joemacho Registered User Join Date: Aug 2007 Location: peoria az Posts: 252	Re: how to fix my frame 72 jimmy 4x4 heres is the picture i hope and thanks again bouncytruck Attached Images Last edited by joemacho; 01-09-2008 at 07:34 PM.

01-09-2008, 08:03 PM	#7
joemacho Registered User Join Date: Aug 2007 Location: peoria az Posts: 252	Re: how to fix my frame 72 jimmy 4x4 heres another pic Attached Images

01-10-2008, 01:24 AM	#8
vtblazer Registered User Join Date: Oct 2003 Location: Central Vermont Posts: 8,538	Re: how to fix my frame 72 jimmy 4x4 Yep, there's trouble there... Not a common problem on a 1st gen but being it's happened you gotta fix it. Check out Off Road Design or DIY4x4, both great companies and products. If there isn't a part already made, you could either replace the frame horn all together or make up some plates and weld em in. OR, find another frame horn and make a plate using it. < (favorite choice IMO) Last edited by vtblazer; 01-10-2008 at 01:25 AM.

01-10-2008, 05:15 AM	#9
Yukon Jack Post Whore Join Date: Feb 2000 Location: Rose Hill, KS, USA Posts: 12,684	Re: how to fix my frame 72 jimmy 4x4 Ouch - never seen a first gen have a break like that one. Like mentioned above, that happens often on the later frames. Good luck with the repair. __________________ 1970 Blazer with a 400 sbc and 4" lift 1980 Pontiac Trans Am, 455 Oldsmobile 2012 Kawasaki Concours 14

01-10-2008, 05:51 AM	#10
bouncytruck SKINNY TIRES RULE! Join Date: Sep 2001 Location: Bothell, WA Posts: 11,049	Re: how to fix my frame 72 jimmy 4x4 I'll agree, never seen that on a first gen. Might be a good time for a frame up rebuild. LUV has an incredibly nice rolling chassis he's thinking about selling. __________________ bouncytruck 1972 K5 The Hauler 1994 K1500 Suburban The Daily2010 Kia Soul Wife's Ride2014 Fiat 500L

01-10-2008, 05:52 AM	#11
MiniD Registered User Join Date: Mar 2007 Location: Portland, OR Posts: 108	Re: how to fix my frame 72 jimmy 4x4 Mine was cracked in the exact location. This is usually the result of putting big tires on the rig and torque from the power steering box cracking the frame. There's a steering box patch kit that you can buy for extra support on the weld. It looks like you're may have already been repaired as you already have bolts in the core support bracket vs rivets. This would make the job MUCH easier. I'd get this work done as soon as possible. You'd be amazed at how 1/16" of an inch of play right below your steering box will cause slop in your steering. Every time you turn the wheel it flexes there and 1/16" of an inch of flex (there) is about 1/8 of a turn on your steering wheel. Last edited by MiniD; 01-10-2008 at 05:53 AM.

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