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mr48chev · 05-19-2017, 02:37 PM

We are going to have to have more info and possibly some photos of it.

If you set the frame up level on stands or blocks with the wheels off the shop floor and the 4 spots you set stands under it being level with each other and a level floor you should be able to measure and or see if there is a twist in the frame. If you have it level across the frame where the stands are the frame horns should be level with each other and the back of the frame should be level side

If it is square that way and doesn't sit level on the shop floor after you roll it back and forth a few feet after letting it down an bounce it a couple of times to get it to settle out you most likely have a spring that is collapsed a bit or a bad spring on the back.

Remember too that you have to have the same size and type of tires side to side with the same amount of tread. Some times the old rollers we have laying around don't match or one or the other doesn't hold air meaning check the air pressure in the tires to make sure it matches.

A lot of donor rigs might sag a bit on the drivers side simply because the donor spent 90% of it's life with only the driver in the car and over the years that side sagged a bit. You can level it some with what is called an "air conditioner spacer" by GM that is a rubber spacer that goes in on top of the spring and works as a shim to level the rig up. I used to use a lot of them when I worked in a Pontiac dealership as the front end man in Waco in the 70's and customers would fuss that their late model Pontiac didn't sit perfectly level side to side. They used to come in about three different thicknesses but that was back then.

If you scroll down to the bottom of the page you will see some Energy suspension spring isolators in various thicknesses There are more on the next page. http://www.oreillyauto.com/site/c/se...make=Chevrolet

If the frame is all square and lined up right I wouldn't worry too much about it until I got the truck all together and drove it down the street and back and measured it to see how it sits. You are looking at a disaster in the making if you pull the spring out now with no weight on the chassis to help compress the spring when you try to put it back together.

05-19-2017, 02:37 PM	#4
mr48chev Registered User Join Date: Jul 2007 Location: Toppenish, WA Posts: 15,287	Re: 50 truck frame issues We are going to have to have more info and possibly some photos of it. If you set the frame up level on stands or blocks with the wheels off the shop floor and the 4 spots you set stands under it being level with each other and a level floor you should be able to measure and or see if there is a twist in the frame. If you have it level across the frame where the stands are the frame horns should be level with each other and the back of the frame should be level side If it is square that way and doesn't sit level on the shop floor after you roll it back and forth a few feet after letting it down an bounce it a couple of times to get it to settle out you most likely have a spring that is collapsed a bit or a bad spring on the back. Remember too that you have to have the same size and type of tires side to side with the same amount of tread. Some times the old rollers we have laying around don't match or one or the other doesn't hold air meaning check the air pressure in the tires to make sure it matches. A lot of donor rigs might sag a bit on the drivers side simply because the donor spent 90% of it's life with only the driver in the car and over the years that side sagged a bit. You can level it some with what is called an "air conditioner spacer" by GM that is a rubber spacer that goes in on top of the spring and works as a shim to level the rig up. I used to use a lot of them when I worked in a Pontiac dealership as the front end man in Waco in the 70's and customers would fuss that their late model Pontiac didn't sit perfectly level side to side. They used to come in about three different thicknesses but that was back then. If you scroll down to the bottom of the page you will see some Energy suspension spring isolators in various thicknesses There are more on the next page. http://www.oreillyauto.com/site/c/se...make=Chevrolet If the frame is all square and lined up right I wouldn't worry too much about it until I got the truck all together and drove it down the street and back and measured it to see how it sits. You are looking at a disaster in the making if you pull the spring out now with no weight on the chassis to help compress the spring when you try to put it back together. __________________ Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around. Last edited by mr48chev; 05-19-2017 at 02:44 PM.