Air bags and towing? - Page 2 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Tx Firefighter · 01-24-2005, 05:57 PM

Here are the panhard mount brackets.

Notice the 3/4 ton is much heavier duty and wraps up the side of the frame rail rather than just being underneath it like the 1/2 ton.

Tx Firefighter · 01-24-2005, 06:02 PM

Here is the real meat and taters of the whole deal though.

The 3/4 ton frame has a long doubler riveted to the bottom frame rail web to strengthen it. The 1/2 ton has a short doubler, no where near as substantial or long as this one.

rockguy · 01-24-2005, 06:18 PM

There is no doubler on my one ton dually maybe it is only on coil spring trucks that are 3/4 ton . coils like air bags isolate the load to that area were the doubler is. Leafs displace the load to 4 points.

Tx Firefighter · 01-24-2005, 06:25 PM

Neither one of my duallys has the doubler either. I'm pretty sure it's just a 3/4 ton coil spring thing.

I posted the pictures because lots of folks think the 1/2 and 3/4 ton frames are the same, it's just the suspension itself that's heavier, when it appears, the frame is beefed up too.

SCOTI · 01-24-2005, 11:57 PM

Thanks for the pics Tx.

I knew some of the brackets were slightly different, but I never realized that the doublers were longer. Great info to know.

4x4Poet · 01-25-2005, 03:27 AM

Interesting, TxFf. If I ever wanted to convert a 2wd 67-72 GM truck into a 4x4 with coils all around, I'd start with a 3/4 ton 2wd for the frame strength factor.

Thanks. Good job.

01-24-2005, 05:57 PM	#26
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	Here are the panhard mount brackets. Notice the 3/4 ton is much heavier duty and wraps up the side of the frame rail rather than just being underneath it like the 1/2 ton. Attached Images __________________ I'm on the Instagram- @Gearhead_Kevin

01-24-2005, 06:02 PM	#27
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	Here is the real meat and taters of the whole deal though. The 3/4 ton frame has a long doubler riveted to the bottom frame rail web to strengthen it. The 1/2 ton has a short doubler, no where near as substantial or long as this one. Attached Images __________________ I'm on the Instagram- @Gearhead_Kevin

01-24-2005, 06:18 PM	#28
rockguy Registered User Join Date: Mar 2003 Location: Crystal Beach Florida Posts: 76	There is no doubler on my one ton dually maybe it is only on coil spring trucks that are 3/4 ton . coils like air bags isolate the load to that area were the doubler is. Leafs displace the load to 4 points. __________________ 69 c-30 dually flat bed & dump ( best truck ive owned 87 chevy dually 97 1500 classic 89 wellcraft

01-24-2005, 06:25 PM	#29
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	Neither one of my duallys has the doubler either. I'm pretty sure it's just a 3/4 ton coil spring thing. I posted the pictures because lots of folks think the 1/2 and 3/4 ton frames are the same, it's just the suspension itself that's heavier, when it appears, the frame is beefed up too. __________________ I'm on the Instagram- @Gearhead_Kevin

01-24-2005, 11:57 PM	#30
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 21,943	Thanks for the pics Tx. I knew some of the brackets were slightly different, but I never realized that the doublers were longer. Great info to know. __________________ 67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... *Cubic inches is like Indiana Jones with a cheap pistol.*

01-25-2005, 03:27 AM	#31
4x4Poet Registered User Join Date: Nov 2004 Location: "Under Montana skies." Posts: 1,836	Interesting, TxFf. If I ever wanted to convert a 2wd 67-72 GM truck into a 4x4 with coils all around, I'd start with a 3/4 ton 2wd for the frame strength factor. Thanks. Good job. __________________ '71 GMC K20 Suburban, '71 GMC K10 Suburban, '72 Chevy C10 CST Suburban, '72 Chevy K20 clunker pickup.

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