Rear leaf arch 4X4-4X2 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

GMCMAX · 01-20-2006, 12:13 AM

What's the difference between the arch on 4X4 vs 4X2 rear leaf springs?
I converted my 68 GMC 2wd to 4wd. The front axle and springs are from a 70 blazer, as is the t/case and 4 speed. The rear springs are the 2wd ones the truck came with, but I had to use 4" blocks in the rear to bring it level with the stock front 4wd suspension. Iwould like to put a 4" lift on it, but with the blocks in the back, more blocks aren't the answer. Would the rear leaves from a 4X4 make it right? And yes, adding the 4X4 front axle to the 2wd frame without another to look at or measure was a PITA, but it all works fine.

67-72williso · 01-20-2006, 09:45 PM

You need the rear spring, front hangers I have. They are off a 68 K-20. That will set the rear at the rite heights for 4X4. The one on the right is the 68 4X4.
Later Willis

GMCMAX · 01-20-2006, 11:47 PM

Willis,
You say I need the set you have, is this a set like you used on yours or a set you have and want to get rid of?
Thanks for the info.......
Max

67-72williso · 01-21-2006, 06:59 AM

Max
Are your frame rails parallel or do they bow out at the rear axle area? These are off a parallel (4X4) so you might have to work on them a little that way. The heights will be correct thow. If you want them $25.00 to your door.
Later Willis

GMCMAX · 01-21-2006, 11:03 AM

I'll go check the frame here later, but most likely I'll take them regardless,just need the buying info.
Thanks again.....
Max

67-72williso · 01-21-2006, 08:34 PM

Max
One more thing I just thought of to is the spring width. 67-68 4X4 are 3" wide at the hanger area I`m gessing yours are 2 1/4". I gess you could use spacers there.
Later Willis

GMCMAX · 01-21-2006, 08:53 PM

Willis,
Yeah, it has zigzag frame and 2 1/2" springs....
I'll still buy your hangers and fab to fit.
Need your info
Thanks
Max

**special-K** · 01-22-2006, 10:54 AM

The wider perches might help to adjust to the difference in frames.Another thought is there are shackle reversal hangers that give 4 or 6 inches of lift.They`re a couple hundred bucks.But if those perches don`t do the trick...
You say your lifting the truck 4",also,right?Either way,you could get away from blocks with these.BTW,welcome and nice truck.

01-20-2006, 12:13 AM	#1
GMCMAX Active Member Join Date: Jan 2006 Location: Lower Mid-East Ca. Posts: 326	Rear leaf arch 4X4-4X2 What's the difference between the arch on 4X4 vs 4X2 rear leaf springs? I converted my 68 GMC 2wd to 4wd. The front axle and springs are from a 70 blazer, as is the t/case and 4 speed. The rear springs are the 2wd ones the truck came with, but I had to use 4" blocks in the rear to bring it level with the stock front 4wd suspension. Iwould like to put a 4" lift on it, but with the blocks in the back, more blocks aren't the answer. Would the rear leaves from a 4X4 make it right? And yes, adding the 4X4 front axle to the 2wd frame without another to look at or measure was a PITA, but it all works fine. __________________ Never try to teach a pig to sing; it wastes your time and annoys the pig! Gets More Chicks My lugnuts require more torque than your honda makes! 68 GMC, 4X4 conversion w/73 k20 running gear and springs, 350 4spd, 4.10's, D44 powerlok front, 14BFF govlock rear, 33" tires, lifted 4".

01-20-2006, 09:45 PM	#2
67-72williso Junk/Daily Driver Club Join Date: Feb 2004 Location: Manheim, PA 17545 Posts: 253	Re: Rear leaf arch 4X4-4X2 You need the rear spring, front hangers I have. They are off a 68 K-20. That will set the rear at the rite heights for 4X4. The one on the right is the 68 4X4. Later Willis Attached Images __________________ Daily Driver: 1970 C-20 400 sbc,sm-465,Dana 61 one ton SRW rear, 3.07 gears, locker. There are three kinds of people: those who make things happen, those who watch things happen, and those who have no idea what happened! Last edited by 67-72williso; 01-20-2006 at 09:50 PM.

01-20-2006, 11:47 PM	#3
GMCMAX Active Member Join Date: Jan 2006 Location: Lower Mid-East Ca. Posts: 326	Re: Rear leaf arch 4X4-4X2 Willis, You say I need the set you have, is this a set like you used on yours or a set you have and want to get rid of? Thanks for the info....... Max __________________ Never try to teach a pig to sing; it wastes your time and annoys the pig! Gets More Chicks My lugnuts require more torque than your honda makes! 68 GMC, 4X4 conversion w/73 k20 running gear and springs, 350 4spd, 4.10's, D44 powerlok front, 14BFF govlock rear, 33" tires, lifted 4".

01-21-2006, 06:59 AM	#4
67-72williso Junk/Daily Driver Club Join Date: Feb 2004 Location: Manheim, PA 17545 Posts: 253	Re: Rear leaf arch 4X4-4X2 Max Are your frame rails parallel or do they bow out at the rear axle area? These are off a parallel (4X4) so you might have to work on them a little that way. The heights will be correct thow. If you want them $25.00 to your door. Later Willis __________________ Daily Driver: 1970 C-20 400 sbc,sm-465,Dana 61 one ton SRW rear, 3.07 gears, locker. There are three kinds of people: those who make things happen, those who watch things happen, and those who have no idea what happened!

01-21-2006, 11:03 AM	#5
GMCMAX Active Member Join Date: Jan 2006 Location: Lower Mid-East Ca. Posts: 326	Re: Rear leaf arch 4X4-4X2 I'll go check the frame here later, but most likely I'll take them regardless,just need the buying info. Thanks again..... Max __________________ Never try to teach a pig to sing; it wastes your time and annoys the pig! Gets More Chicks My lugnuts require more torque than your honda makes! 68 GMC, 4X4 conversion w/73 k20 running gear and springs, 350 4spd, 4.10's, D44 powerlok front, 14BFF govlock rear, 33" tires, lifted 4".

01-21-2006, 08:34 PM	#6
67-72williso Junk/Daily Driver Club Join Date: Feb 2004 Location: Manheim, PA 17545 Posts: 253	Re: Rear leaf arch 4X4-4X2 Max One more thing I just thought of to is the spring width. 67-68 4X4 are 3" wide at the hanger area I`m gessing yours are 2 1/4". I gess you could use spacers there. Later Willis __________________ Daily Driver: 1970 C-20 400 sbc,sm-465,Dana 61 one ton SRW rear, 3.07 gears, locker. There are three kinds of people: those who make things happen, those who watch things happen, and those who have no idea what happened! Last edited by 67-72williso; 01-21-2006 at 08:35 PM.

01-21-2006, 08:53 PM	#7
GMCMAX Active Member Join Date: Jan 2006 Location: Lower Mid-East Ca. Posts: 326	Re: Rear leaf arch 4X4-4X2 Willis, Yeah, it has zigzag frame and 2 1/2" springs.... I'll still buy your hangers and fab to fit. Need your info Thanks Max __________________ Never try to teach a pig to sing; it wastes your time and annoys the pig! Gets More Chicks My lugnuts require more torque than your honda makes! 68 GMC, 4X4 conversion w/73 k20 running gear and springs, 350 4spd, 4.10's, D44 powerlok front, 14BFF govlock rear, 33" tires, lifted 4".

01-22-2006, 10:54 AM	#8
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,858	Re: Rear leaf arch 4X4-4X2 The wider perches might help to adjust to the difference in frames.Another thought is there are shackle reversal hangers that give 4 or 6 inches of lift.They`re a couple hundred bucks.But if those perches don`t do the trick... You say your lifting the truck 4",also,right?Either way,you could get away from blocks with these.BTW,welcome and nice truck. __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~



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