G-TR Rear Coil Over Suspension

[GEARBOXGARAGE]

Wanting to do a static drop on the rear of your '63-'72 but don't want to settle on one height? Our G-TR coil over rear suspension is almost finished up and coming to market soon! Expect an approximate drop range of 4" to 6" Watch for details and prices to be posted soon.

[tr69c10]

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[Shooters_7]

Interested in more details.... Are you doing the front as well?

[GEARBOXGARAGE]

This pic with the bed on may give a better "visual" as to how much the rear is lowered. This is at the lowest setting of approximately a 6" drop.


As far as details go,

-The ride height will be adjustable from approx. 4"-6"

-Shocks are moved into a vertical position to work more effectively with the suspension movement.

-Maintains maximum tire clearance by containing all components within the frame rails.

-Both upper and lower shock mounting points are a double-shear type, capturing both sides of the shock for improved strength and durabillity.

-Uses factory frame holes for a true "bolt-in" installation.

-Heavy Duty double adjustable panhard bar with QA1 XM Series Chromoly rod ends allow for easy centering of the rear-end.

-Grade 8 hardware included.

-QA1 Single Adjust Coilover shocks included with 400 lb springs, other spring rates available at customer request.

-Can be ugraded to Double Adjust Coilovers for $200 added price.

-Retail price is set at $1,200 for the full kit with Single Adjust Shocks. Forum Memebers save $100

-Base kits without shocks can also be purchased for $700, Forum Member price $650.

[GEARBOXGARAGE]

Originally Posted by Shooters_7

Interested in more details.... Are you doing the front as well?

Currently we do not have anything in the works for the front.

[lolife99]

Does the lower shock mount attach to the rearend or the trailing arm?

[GEARBOXGARAGE]

Originally Posted by lolife99

Does the lower shock mount attach to the rearend or the trailing arm?

The lower mount is attached by a "C" bracket the wraps around the trailing arm and is captured both top and bottom by the U-bolt used to bolt the rear end in place.

[Wasted Income]

400 lb/in springs? Is that what is required to hold these trucks up in the rear? What is the travel of those shocks?

[GEARBOXGARAGE]

Factory springs are rated right around 600 lb/in. We start with a 400 lb spring as a base line to improve performance characteristics/weight transfer without giving up to much with load capabilties. (It's not so much designed for hauling or towing heavy loads as it is for performance gains) Just for comparison, the Hotchkis 6" rear springs are rated at 380 lb/in. The coil overs have an approx. travel of 5.375" with an 11.625" compressed height and 17" extended, using a 12" spring.

[lolife99]

Any way to use a shorter shock to keep the lower bracket above the trailing arm,... for scrubline issues?

[Wasted Income]

Originally Posted by GEARBOXGARAGE

Factory springs are rated right around 600 lb/in. We start with a 400 lb spring as a base line to improve performance characteristics/weight transfer without giving up to much with load capabilties. (It's not so much designed for hauling or towing heavy loads as it is for performance gains) Just for comparison, the Hotchkis 6" rear springs are rated at 380 lb/in. The coil overs have an approx. travel of 5.375" with an 11.625" compressed height and 17" extended, using a 12" spring.

GREAT info. Thanks.

[GEARBOXGARAGE]

Originally Posted by lolife99

Any way to use a shorter shock to keep the lower bracket above the trailing arm,... for scrubline issues?

Yes, a shorter shock can be substituted and then adjust the lower bracket location to compensate. The trade-off would be a shorter shock travel, roughly 4" instead of 5"+. That's where our base kit package can come in handy, the customer can choose their own coilovers. One note, though, we developed this kit to use QA1's or a similar shock with the knobs at the bottom for ease of access for adjustment. Not that brands with the adjustment knobs at the top won't fit, we just haven't tested that style for any clearance issues yet.

[66-PMD-GMC]

Do you have anything on front coil over suspension?

[66-PMD-GMC]

Originally Posted by 66-PMD-GMC

Do you have anything on front coil over suspension?

That should read "Do you have anything for the front suspension in the works??"
Not sure what is going on but I had to try and post this 3 times to get it to post at all.. ??

[GEARBOXGARAGE]

Currently, no. It could be a possibility in the future, but we are focusing on rear suspension products at the time.

[68Stepbed]

What kind of trailing arm is pictured? Do you make those? Exactly what is included in the kit for $1200?

[GEARBOXGARAGE]

We developed this kit using Early Classic Trailing Arms, which are a 1/4" taller that the stock ones, but a spacer is included for those still running stock. This makes the kit somewhat universal. We are planning on our own trailing arms next year that will incorporate the lower mounts right on the arm instead of using a seperate bracket. They will also have a spherical bearing for the mounting point instead of poly or rubber bushings, but we are working out the details. The kit would then be available in two configurations, without the arms if someone wanted an ecinomical bolt in kit, or with the arms for a complete rear suspension upgrade. We are forcasting an approximate price of $1,400-$1,500 for the complete kit. The kit listed above will have the bolt in frame crossmember, lower shock brackets, double adjustable panhard bar with QA1 Chromoly rod ends, single adjustable QA1 bearing mount shocks with #400 springs (other rates available per customer request) and all grade 8 hardware included.

[okyankee]

sweet. looks like what I need. I could get a real wide tire on my 67 then.

[GEARBOXGARAGE]

Originally Posted by okyankee

sweet. looks like what I need. I could get a real wide tire on my 67 then.

Yeah, that was one of our goals, to provide maximun tire clearance.

[66-PMD-GMC]

LOL! I just noticed the carpet in your photos...
Reminds me of hiding in friends garages in Michigan during the winter, standing close to a wood stove staying warm...
I moved to Arizona from Ludington.. was born in Howell...
What memories...

[okyankee]

Originally Posted by GEARBOXGARAGE

Yeah, that was one of our goals, to provide maximun tire clearance.

have you tested how big of a tire fits back there yet? I plan on tubbing my bed also.

[GEARBOXGARAGE]

Originally Posted by okyankee

have you tested how big of a tire fits back there yet? I plan on tubbing my bed also.

The tires/wheels that are in the photos 295/45 mounted on 18x9.5 with 4.75 backspacing on a stock width axle. These measure out to about 28.5" tall and 11.5" wide and there is room to go at least 4" wider toward the frame.

[okyankee]

Originally Posted by GEARBOXGARAGE

The tires/wheels that are in the photos 295/45 mounted on 18x9.5 with 4.75 backspacing on a stock width axle. These measure out to about 28.5" tall and 11.5" wide and there is room to go at least 4" wider toward the frame.

thanks for the info. it looks like a 29/15.00/20 should squeeze in there with some bed tubbing.

[BLBatesDC]

Is the rear suspension on the '60-'62 that much different that this can't be modified to work? I have an '85 front suspension in place of the torsion bars, and I have removed the "X" frame. I plan on using a couple of the tubular cross braces from Porterbuilt to add some rigidity. Think it'll work?

[GEARBOXGARAGE]

Originally Posted by BLBatesDC

Is the rear suspension on the '60-'62 that much different that this can't be modified to work? I have an '85 front suspension in place of the torsion bars, and I have removed the "X" frame. I plan on using a couple of the tubular cross braces from Porterbuilt to add some rigidity. Think it'll work?

The shock mount cross-member was designed to bolt into factory holes in the frames of '63-'72, with one of them being the 1/2" bolt hole used to fasten the upper factory spring cup in place. I don't have any experience putting one of these kits on a '60-'62 truck, but I would think that you could use these two 1/2" bolt holes as a guide to line up the cross-member and drill the 6 other 7/16" bolt holes if needed. Hope this helps answer your question.