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Old 01-09-2014, 03:42 AM
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towing with a Corvette rear...

I have mounted an '86 Corvette rear under my '57 Suburban, using a Flat Out Engineering kit. Works great, comfortable even with the stock Corvette spring, as long as the truck is empty!!!
According to my info, the weight on the rear of my Suburban is about 300lbs heavier than on the rear of an '86 Corvette, not that much, really.
Anyway, I sometimes tow a 3700lbs camping trailer with my truck and I have to tighten my weight distribution hitch like crazy to do it. I have recently towed 5000 miles in a month like that, so it works, but I would like to "help" my rear suspension a bit!
I was not too lucky with air shocks (leaks) and I fear the bigger effort on upper shock mounts; I could not find an airbag kit for a Corvette rear; I fear that a stronger transverse (steel) spring would make the ride too stiff, too "truck-like".
So, what are you guys' suggestions?
Can I use airbags between the stock spring and the diff mounting-wings, or is this too much for the plastic spring?
And do not tell me to stop towing with a Corvette rear, I love my truck that way, I just need to fine-tune it!

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Old 01-09-2014, 07:39 AM
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sliders ?

Does your trailer have a slider axle carriage so you can balance the load to not have as much tongue weight ?
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Old 01-09-2014, 09:32 AM
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Quote:
Originally Posted by timothale View Post
Does your trailer have a slider axle carriage so you can balance the load to not have as much tongue weight ?
No, no such luck! I do have the spare wheels and the corner jack inside the trailer behind the axle, I guess every little bit helps, but not enough...
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Old 01-09-2014, 09:36 AM
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Convert it to coil overs. Then you can dictate the spring rate.
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Old 01-09-2014, 09:44 AM
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Coil overs have a very short stroke, which is not very good for comfort. Also, raising the vehicle for towing requires crawling under the truck with a wrench to turn the bottom spring holder (and even removing the wheels), and I want something easier than that.
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Old 01-10-2014, 09:33 AM
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Quote:
Originally Posted by wave1957 View Post
Coil overs have a very short stroke, which is not very good for comfort. Also, raising the vehicle for towing requires crawling under the truck with a wrench to turn the bottom spring holder (and even removing the wheels), and I want something easier than that.
I think your confused on coilovers. Once installed and set, they require no further adjustment because you'll be more interested in spring rate than dampening characteristics. Of course, most have adjustable compression and/or rebound too. And they come in different stroke lengths. Are you thinking of the (add-on) helper springs?

Russ
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Old 01-11-2014, 02:54 AM
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Originally Posted by S10xGN View Post
I think your confused on coilovers. Once installed and set, they require no further adjustment because you'll be more interested in spring rate than dampening characteristics. Of course, most have adjustable compression and/or rebound too. And they come in different stroke lengths. Are you thinking of the (add-on) helper springs?

Russ
In my original question, I am looking for a way of "helping" my suspension when towing: I am , in one way or another, looking for 2 suspension ratings for my truck, one comfortable when empty and a stronger one for towing. Coil-overs do not offer that as you describe when you write "Once installed and set". So I believe that coil overs are not for me
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Old 01-12-2014, 04:53 PM
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I think Air helpers are the only way.
Probably have to use Air shocks or those Airbag over shock things due to the independant rear end.

Anything else is a compromise between ride and weight carrying capability.

Yes I'm an air ride fan
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Old 01-13-2014, 02:41 AM
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Originally Posted by 427v8 View Post
I think Air helpers are the only way.
Probably have to use Air shocks or those Airbag over shock things due to the independant rear end.

Anything else is a compromise between ride and weight carrying capability.

Yes I'm an air ride fan
I do not have much space between 4-bars and chassis for airbag over shocks, I will have to measure accurately and find a supplier willing to help! It probably would be the best, indeed... if I can!
By the way, I love your GMC motorhome, if I had to buy an RV, that is what I would be looking for. The front wheel drive allows for a nice low floor and low overall vehicle, but I have heard they eat up a lot of transmissions which do not like the weight...
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Old 01-13-2014, 07:03 PM
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Yeah I have a C3 Vette not a lot of room under there.
Maybe just use airshocks and accept the lifespan...

Thanks!
I love my GMC.
The transmissions are fine as long as you don't engine brake downhills. They are also cheap, easy to work on and well supported. Better than any motorhome out of warrenty!
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Old 01-13-2014, 08:14 PM
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How about using Shockwave's instead of coil overs, thus you get air ride to adjust air pressure based on towing vs. cruising?

84-96 C4 Corvette IRS rear suspension kit car truck | Progressive Automotive

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Old 01-14-2014, 02:13 AM
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Are ShockWaves good for towing, can they be used as a load-leveller suspesion? Or do they have just one position (ie pressure inside) that works well and all other heights would be too hard...?
Can ShockWaves be inflated with a regular tire pump? Can I just inflate them to where I want and leave them, meaning no need for an onboard compressor?
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Old 01-14-2014, 05:29 AM
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I'de suggest contacting Ridetech:

ShockWaves - RideTech.com - Suspension Specialist - Online Store ~ Call Us: 812.481.4787 ~ Email: sales@ridetech.com

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