Lowering the rear with coils- track bar? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

70c10 · 12-25-2005, 09:19 PM

I am planning to drop the rear of my 70' with either 4" or 5" coils. How much will this shift the rear of my truck?. I'm assuming the 5" will shift it to where I need a track bar. Correct?

cableguy0 · 12-25-2005, 09:41 PM

thats definately enough that you will need and adjustable track bar

SCOTI · 12-26-2005, 12:44 AM

Over 5" will require adjusting the length of the track bar which can be accomplished different ways. Two of those ways are cutting the stock bar to the desired length required to center the rear @ the new lowered ride height or spending the money for an adjustable bar.

The adjustable bar is easier & modifying the stock bar is less money. Which do you have more of: time or money?

mike nutt · 12-26-2005, 09:18 AM

70c10, heres a picture of the rear of my '69c/10 with 6" springs and an adjustable super track bar from ECE. the longer bar greatly reduces side to side movement during suspension travel.

70c10 · 12-26-2005, 09:37 AM

Thanks guys!

70c10 · 12-27-2005, 02:35 PM

After reading this again, Scoti says "over" 5" needs one and mike nutt has a 6" drop. Is it possible 5" may work without the adjustable bar?.

cableguy0 · 12-27-2005, 02:49 PM

going 5 your definately going to have the rear shifted to one side screwing up all the suspension geometry.

SCOTI · 12-27-2005, 07:57 PM

The more you lower it, the more the rear shifts over to the pass side.

I know you can get away w/a 5" drop w/o an adjustable bar (or longer, super track bar) because my buddy was too cheap to buy one when we did his 65. Whether it works or not on your combo is directly related to how wide the wheel/tire combo is & what kind of backspacing you have.

To make sure the tires won't rub, use an adjustable bar.

12-25-2005, 09:19 PM	#1
70c10 67-72 Addict! Join Date: Feb 2002 Location: The TAX State! Posts: 7,856	Lowering the rear with coils- track bar? I am planning to drop the rear of my 70' with either 4" or 5" coils. How much will this shift the rear of my truck?. I'm assuming the 5" will shift it to where I need a track bar. Correct? __________________ Jim 1970 C/10 Fleetside w/Ghost Flames Lowered 4.5" front and 4" rear (Raked) 355/350 Turbo w/shift kit 10" Redneck Performance Verter w/2500 stall Hooker Super Comps part#2808-1 Performer RPM Air-Gap 12 Bolt w/3:73 gears- Eaton Posi Comp Cams XE262 with 1.6 Crane Energizers, Road Demon 625 and Brodix IK 180 heads

12-25-2005, 09:41 PM	#2
cableguy0 Senior Member Join Date: Apr 2000 Location: Delta,Pa Posts: 14,948	Re: Lowering the rear with coils- track bar? thats definately enough that you will need and adjustable track bar __________________ Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member.

12-26-2005, 12:44 AM	#3
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 22,068	Re: Lowering the rear with coils- track bar? Over 5" will require adjusting the length of the track bar which can be accomplished different ways. Two of those ways are cutting the stock bar to the desired length required to center the rear @ the new lowered ride height or spending the money for an adjustable bar. The adjustable bar is easier & modifying the stock bar is less money. Which do you have more of: time or money? __________________ 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.* Last edited by SCOTI; 12-26-2005 at 05:23 PM.

12-26-2005, 09:18 AM	#4
mike nutt 69fatmotor Join Date: Oct 2005 Location: bama Posts: 660	Re: Lowering the rear with coils- track bar? 70c10, heres a picture of the rear of my '69c/10 with 6" springs and an adjustable super track bar from ECE. the longer bar greatly reduces side to side movement during suspension travel. Last edited by mike nutt; 02-22-2009 at 08:56 PM.

12-26-2005, 09:37 AM	#5
70c10 67-72 Addict! Join Date: Feb 2002 Location: The TAX State! Posts: 7,856	Re: Lowering the rear with coils- track bar? Thanks guys! __________________ Jim 1970 C/10 Fleetside w/Ghost Flames Lowered 4.5" front and 4" rear (Raked) 355/350 Turbo w/shift kit 10" Redneck Performance Verter w/2500 stall Hooker Super Comps part#2808-1 Performer RPM Air-Gap 12 Bolt w/3:73 gears- Eaton Posi Comp Cams XE262 with 1.6 Crane Energizers, Road Demon 625 and Brodix IK 180 heads

12-27-2005, 02:35 PM	#6
70c10 67-72 Addict! Join Date: Feb 2002 Location: The TAX State! Posts: 7,856	Re: Lowering the rear with coils- track bar? After reading this again, Scoti says "over" 5" needs one and mike nutt has a 6" drop. Is it possible 5" may work without the adjustable bar?. __________________ Jim 1970 C/10 Fleetside w/Ghost Flames Lowered 4.5" front and 4" rear (Raked) 355/350 Turbo w/shift kit 10" Redneck Performance Verter w/2500 stall Hooker Super Comps part#2808-1 Performer RPM Air-Gap 12 Bolt w/3:73 gears- Eaton Posi Comp Cams XE262 with 1.6 Crane Energizers, Road Demon 625 and Brodix IK 180 heads

12-27-2005, 02:49 PM	#7
cableguy0 Senior Member Join Date: Apr 2000 Location: Delta,Pa Posts: 14,948	Re: Lowering the rear with coils- track bar? going 5 your definately going to have the rear shifted to one side screwing up all the suspension geometry. __________________ Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member.

12-27-2005, 07:57 PM	#8
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 22,068	Re: Lowering the rear with coils- track bar? The more you lower it, the more the rear shifts over to the pass side. I know you can get away w/a 5" drop w/o an adjustable bar (or longer, super track bar) because my buddy was too cheap to buy one when we did his 65. Whether it works or not on your combo is directly related to how wide the wheel/tire combo is & what kind of backspacing you have. To make sure the tires won't rub, use an adjustable bar. __________________ 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.*



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