Rear dually inner tire rubbing on right coil spring - The 1947 - Present Chevrolet & GMC Truck Message Board Network

70SOL · 12-08-2012, 12:33 AM

Hi i just bought 67 dually & right rear inner tire is rubbing with coil spring, could it be that trailing arm is bent?

lap15 · 12-08-2012, 12:46 AM

Dual rear wheel trucks from the factory DID NOT come with coil springs, only leaf springs. Your truck was converted to dual rear wheels but was not made for them. I would convert it back to single rear wheels and see how it operates.

70SOL · 12-08-2012, 12:54 AM

Ok thanks got it

Tx Firefighter · 12-08-2012, 07:21 AM

Those springs boosters in the coil springs aren't doing you any favors. They can cause the spring to bow. Also, check the clearance between wheels and the frame on both sides to compare the difference. You might have panhard bar issues. Worst case get an adjustable panhard bar and crank it back over till it's even. A set of new coil springs and an adjustable panhard bar will run you less than 200 dollars combined and you'll be good to go.

FYI, I've seen a number of duallys with coil springs and they work fine as long as everything is straight.

**special-K** · 12-08-2012, 07:48 AM

TX's advise is exactly what I thought I'd suggest when I saw your 1st post. These rears shift sideways when position is changed on the vertical plane (raised/lowered). It could also be in part due to tires width. You may have tires wider than offered on that model and the rear being shifted is making a difference. Tell us more about your truck. Mainly,is it a C/20 or C/30 and what options show on the SPID (sticker inside glovebox)?
GM did in fact build factory dual rear wheel cab & chassis with coil rear suspension and yours could very well be one. They didn't build C/30s with coil rear,that is true,but did offer a dual rear wheel option on C/20 cab & chassis models. Rare but true.

Tx Firefighter · 12-08-2012, 08:05 AM

We have a member here who won truck of the month with a factory coil spring dually. I think his name is Slomotion. Beautiful truck that is.
Posted via Mobile Device

70SOL · 12-11-2012, 02:12 AM

Yes it's the spring lift the issues, i remove them & issues was fix, Thanks guys for your reply

**special-K** · 12-11-2012, 10:29 PM

That's cool. I'm still curious what your truck is. Is it a C/20 with dual rear wheel option or did someone do the conversion?

70SOL · 12-11-2012, 10:47 PM

I'm not sure Special-K that's how i get it, how could i find out or get info if it came like org dually,, i know sure it's C-20,,I bought it from a guy who said that it had a big unclosed box, i rellay like the truck, I'm thinking short it & make a stake bed with 19.5wheels

**slomotion** · 12-12-2012, 10:07 AM

70SOL, First off, I would go slowly on modifying your truck until you find out what it is. To expand a little on what Tx Firefighter said, another potential problem is the bushings and or the panhard bar bracket on the frame being worn out. I had to replace everything including the bar because of wear, and rust issues.
Is the SPID on the glove box door? If it's still there, and you see the 4R05AT there's a good chance you have a rare one.
Through the good folks on this board, and the mountain of information available here, I have learned that with our trucks there are very few absolute statements that can be made, so when you see an emphatic statement, trust, but verify.....
BTW, Tx Firefighter, thank you for the comments!

12-08-2012, 12:33 AM	#1
70SOL Registered User Join Date: Jun 2010 Location: 310-909 CA Posts: 45	Rear dually inner tire rubbing on right coil spring Hi i just bought 67 dually & right rear inner tire is rubbing with coil spring, could it be that trailing arm is bent? Attached Images __________________ 1967 Daully 1990 K5 1967 CAMARO-RS 1991 H-D SOFTAIL

12-08-2012, 12:46 AM	#2
lap15 Registered User Join Date: Jun 2011 Location: Womelsdorf,PA Posts: 93	Re: Rear dually inner tire rubbing on right coil spring Dual rear wheel trucks from the factory DID NOT come with coil springs, only leaf springs. Your truck was converted to dual rear wheels but was not made for them. I would convert it back to single rear wheels and see how it operates.

12-08-2012, 12:54 AM	#3
70SOL Registered User Join Date: Jun 2010 Location: 310-909 CA Posts: 45	Re: Rear dually inner tire rubbing on right coil spring Ok thanks got it __________________ 1967 Daully 1990 K5 1967 CAMARO-RS 1991 H-D SOFTAIL

12-08-2012, 07:21 AM	#4
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	Re: Rear dually inner tire rubbing on right coil spring Those springs boosters in the coil springs aren't doing you any favors. They can cause the spring to bow. Also, check the clearance between wheels and the frame on both sides to compare the difference. You might have panhard bar issues. Worst case get an adjustable panhard bar and crank it back over till it's even. A set of new coil springs and an adjustable panhard bar will run you less than 200 dollars combined and you'll be good to go. FYI, I've seen a number of duallys with coil springs and they work fine as long as everything is straight.

12-08-2012, 07:48 AM	#5
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,851	Re: Rear dually inner tire rubbing on right coil spring TX's advise is exactly what I thought I'd suggest when I saw your 1st post. These rears shift sideways when position is changed on the vertical plane (raised/lowered). It could also be in part due to tires width. You may have tires wider than offered on that model and the rear being shifted is making a difference. Tell us more about your truck. Mainly,is it a C/20 or C/30 and what options show on the SPID (sticker inside glovebox)? GM did in fact build factory dual rear wheel cab & chassis with coil rear suspension and yours could very well be one. They didn't build C/30s with coil rear,that is true,but did offer a dual rear wheel option on C/20 cab & chassis models. Rare but true. __________________ "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 ~ Last edited by special-K; 12-08-2012 at 10:36 PM.

12-08-2012, 08:05 AM	#6
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	Re: Rear dually inner tire rubbing on right coil spring We have a member here who won truck of the month with a factory coil spring dually. I think his name is Slomotion. Beautiful truck that is. Posted via Mobile Device

12-11-2012, 02:12 AM	#7
70SOL Registered User Join Date: Jun 2010 Location: 310-909 CA Posts: 45	Re: Rear dually inner tire rubbing on right coil spring Yes it's the spring lift the issues, i remove them & issues was fix, Thanks guys for your reply __________________ 1967 Daully 1990 K5 1967 CAMARO-RS 1991 H-D SOFTAIL

12-11-2012, 10:29 PM	#8
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,851	Re: Rear dually inner tire rubbing on right coil spring That's cool. I'm still curious what your truck is. Is it a C/20 with dual rear wheel option or did someone do the conversion? __________________ "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 ~

12-11-2012, 10:47 PM	#9
70SOL Registered User Join Date: Jun 2010 Location: 310-909 CA Posts: 45	Re: Rear dually inner tire rubbing on right coil spring I'm not sure Special-K that's how i get it, how could i find out or get info if it came like org dually,, i know sure it's C-20,,I bought it from a guy who said that it had a big unclosed box, i rellay like the truck, I'm thinking short it & make a stake bed with 19.5wheels __________________ 1967 Daully 1990 K5 1967 CAMARO-RS 1991 H-D SOFTAIL

12-12-2012, 10:07 AM	#10
slomotion Old Duffer Join Date: Mar 2003 Location: Maine Posts: 1,822	Re: Rear dually inner tire rubbing on right coil spring 70SOL, First off, I would go slowly on modifying your truck until you find out what it is. To expand a little on what Tx Firefighter said, another potential problem is the bushings and or the panhard bar bracket on the frame being worn out. I had to replace everything including the bar because of wear, and rust issues. Is the SPID on the glove box door? If it's still there, and you see the 4R05AT there's a good chance you have a rare one. Through the good folks on this board, and the mountain of information available here, I have learned that with our trucks there are very few absolute statements that can be made, so when you see an emphatic statement, trust, but verify..... BTW, Tx Firefighter, thank you for the comments! Attached Images __________________ '68 Short C20 Flatbed Dually w/ 292 4bbl, Langdon cast headers, and WC T5 trans. '81 G10 Shorty Van "Good judgement comes from experience, and a lot of that comes from bad judgement." Will Rogers "Under promise, then over achieve."



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