Suspension question (dopped) - The 1947 - Present Chevrolet & GMC Truck Message Board Network

WB72 · 04-13-2004, 07:32 PM

I just finished installing Chassis Tech 2.5" drop spindles, and the front coil was cut 1/4 coil off of a 1/2 ton coil. The rear has 4" Chassis Tech lowered springs.

I just converted this truck from 8 bolt C20 to 5 bolt C10.

I have no tires and rims yet, but I have the Axle and Lower comtrol arms on jack stands at the exact same height to the center of the axle and spindle.
To me, it looks like the rear sits lower than the front, I have measured to the top fo the wheel well and the measurement is 3/4" lower in the back.

Question:
1) Is there a place to measure that is level with the world once the tires are on?
2) Should I cut 1/4 more coil out before I get it aligned?
3) Will the measurements change once the front end is supported by the wheel rather than the control arm?

special70gmc · 04-13-2004, 07:42 PM

yeah it will be lower in the front because of the different position of the wheels vs the stands, the wheels are ferther twards the outside of the truck than the stands are creating more leverage on the suspention my .2 -kyle

WB72 · 04-13-2004, 07:45 PM

That is what I was thinking, but what do you think about the 3/4" difference in the front to the rear?

Would it make a difference that I had 3/4 ton springs in the rear?

RON WOODGEARD · 04-13-2004, 08:05 PM

This is a tough question to answer due to fact tha we don't know where it's sittng and on what??? If it's dirt, I wouldn't worry about anything until you are able to get it to a level spot, IE: Level pavement.. 3/4" is nothing, And you may take more out of the spring and it be not where you want it,, You can take out more if needed/wanted, But you can't add..(Unless it would be a cushion, or rubber spacer.) set up everything the way it is, once you get the wheels and tires on it, then you can decide, before you take it to the alignment shop.

WB72 · 04-13-2004, 08:10 PM

Yes it is on level concrete, In my garage. I don't think I would like the stance if the rear is lower than the front, but I could live with the rear being a bit higher.
I guess I will have to wait for the tires and rims and see from there.

Will there be a difference (noticable) being that the front end is not aligned? I did change out the upper and lower control arms from a C20 to a C10.

cdowns · 04-13-2004, 08:40 PM

get bigger tires for the rear

RON WOODGEARD · 04-13-2004, 10:33 PM

Quote:

Originally posted by WB72
Yes it is on level concrete, In my garage. I don't think I would like the stance if the rear is lower than the front, but I could live with the rear being a bit higher.
I guess I will have to wait for the tires and rims and see from there.

Will there be a difference (noticable) being that the front end is not aligned? I did change out the upper and lower control arms from a C20 to a C10.

Good to hear it is level,, The alignment won't have any effect on how high the front end sets.. what is the measurement from the pavement to the center of the spindle and center of the rear axle?? You could,, Make a little longer Shackles, That would raise the rear of the vehicle. You could also put the rubber bushings in between the bed and frame< they have these made for this, I'm sure Shawn at **************** has them, They are only about 1/2" though.
I want my truck sitting level to the ground as the bottom of the cab sits. I didn't want a "rake" of any kind. So I understand where you're coming from. But I still think you'll need to put wheels and tires on it to see for sure. That is also going to change the distance from centerline to bottom of fender.Or the distance from the top of the tire to the bottom of the fender.. I went with a 6" rear drop and a 4" front, It set the rear about 1" lower then the front. I need to fix it still, but mine's an easy fix.(I don't want it any lower then it is now though.)

WB72 · 04-13-2004, 11:02 PM

Thanks for the input.
I know that the stance is fixable, but I was just wondering if there was a line that could be measured off of.
I believe that I will take another 1/4 of a coil from the front springs if I need to once the wheels are on it.

How did you get your 4" up front? was it spindles and springs or airbags?

RON WOODGEARD · 04-14-2004, 01:01 AM

Quote:

Originally posted by WB72
Thanks for the input.
I know that the stance is fixable, but I was just wondering if there was a line that could be measured off of.
I believe that I will take another 1/4 of a coil from the front springs if I need to once the wheels are on it.

How did you get your 4" up front? was it spindles and springs or airbags?

Spindles and springs..

04-13-2004, 07:32 PM	#1
WB72 Before and After Join Date: Feb 2000 Location: Leduc, Alberta CANADA Posts: 632	Suspension question (dopped) I just finished installing Chassis Tech 2.5" drop spindles, and the front coil was cut 1/4 coil off of a 1/2 ton coil. The rear has 4" Chassis Tech lowered springs. I just converted this truck from 8 bolt C20 to 5 bolt C10. I have no tires and rims yet, but I have the Axle and Lower comtrol arms on jack stands at the exact same height to the center of the axle and spindle. To me, it looks like the rear sits lower than the front, I have measured to the top fo the wheel well and the measurement is 3/4" lower in the back. Question: 1) Is there a place to measure that is level with the world once the tires are on? 2) Should I cut 1/4 more coil out before I get it aligned? 3) Will the measurements change once the front end is supported by the wheel rather than the control arm? __________________ Not Grandpa's C-20 anymore... 383 Stroker 425HP, 485Ft/Lbs Lowered 3.5" Front / 5" Rear 66,000 miles. Alberta, CANADA

04-13-2004, 07:42 PM	#2
special70gmc Registered User Join Date: Sep 2002 Location: long island, new york Posts: 1,333	yeah it will be lower in the front because of the different position of the wheels vs the stands, the wheels are ferther twards the outside of the truck than the stands are creating more leverage on the suspention my .2 -kyle __________________ 1986 c-10 swb 5/7 drop 20'' coys 1958 belair 2door

04-13-2004, 07:45 PM	#3
WB72 Before and After Join Date: Feb 2000 Location: Leduc, Alberta CANADA Posts: 632	That is what I was thinking, but what do you think about the 3/4" difference in the front to the rear? Would it make a difference that I had 3/4 ton springs in the rear? __________________ Not Grandpa's C-20 anymore... 383 Stroker 425HP, 485Ft/Lbs Lowered 3.5" Front / 5" Rear 66,000 miles. Alberta, CANADA Last edited by WB72; 04-13-2004 at 08:00 PM.

04-13-2004, 08:10 PM	#5
WB72 Before and After Join Date: Feb 2000 Location: Leduc, Alberta CANADA Posts: 632	Yes it is on level concrete, In my garage. I don't think I would like the stance if the rear is lower than the front, but I could live with the rear being a bit higher. I guess I will have to wait for the tires and rims and see from there. Will there be a difference (noticable) being that the front end is not aligned? I did change out the upper and lower control arms from a C20 to a C10. __________________ Not Grandpa's C-20 anymore... 383 Stroker 425HP, 485Ft/Lbs Lowered 3.5" Front / 5" Rear 66,000 miles. Alberta, CANADA

04-13-2004, 08:40 PM	#6
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	get bigger tires for the rear __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

04-13-2004, 08:05 PM	#4
RON WOODGEARD Resident Young Old Dude ! Join Date: Jul 2001 Location: Nevada Posts: 1,948	This is a tough question to answer due to fact tha we don't know where it's sittng and on what??? If it's dirt, I wouldn't worry about anything until you are able to get it to a level spot, IE: Level pavement.. 3/4" is nothing, And you may take more out of the spring and it be not where you want it,, You can take out more if needed/wanted, But you can't add..(Unless it would be a cushion, or rubber spacer.) set up everything the way it is, once you get the wheels and tires on it, then you can decide, before you take it to the alignment shop.

04-13-2004, 11:02 PM	#8
WB72 Before and After Join Date: Feb 2000 Location: Leduc, Alberta CANADA Posts: 632	Thanks for the input. I know that the stance is fixable, but I was just wondering if there was a line that could be measured off of. I believe that I will take another 1/4 of a coil from the front springs if I need to once the wheels are on it. How did you get your 4" up front? was it spindles and springs or airbags? __________________ Not Grandpa's C-20 anymore... 383 Stroker 425HP, 485Ft/Lbs Lowered 3.5" Front / 5" Rear 66,000 miles. Alberta, CANADA



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