+'05 axle conversion

gnxtc2 · May 25, 2015

Currently have a 3" Sky RSK. I want to lower my truck to increase clearance over the bed for the GN trailer. If I convert to +'05 axles, would the height go down if I use stock coil springs?

Does the coil sprung front end ride better?

Thanks

Billy T.
[email protected]

brettboat · May 25, 2015

Cary at CT Performance would be the guy to talk to. He's done a few

equalizier · May 25, 2015

I have a bigger lift and wheels and I can tow a goose neck trailer.The neck on my trailer is adjustable.I don't know what kind of trailer you have but it would be worth looking into.

FrankTheTank · May 26, 2015

It would be the same or around the same as a stock 350 truck. You can also buy the 4400lb gas truck coils (prolly closer to actual front weight anyway) to drop it even a few more inches. The front axle weight on my truck is 4800 and rear is 2400 as it sits on level ground for a referance

You still got my number? I can throw a few measurements at you

Jason · May 26, 2015

The OP is pulling an enclosed gooseneck. When I had my lifted ccsb, I played hell getting one built with the riser height to clear my 6" lift and 35's. NOBODY would give me the riser height AND a tapered nose. Sometimes it's just more sensible to go lower...like I did.

Tom S · May 26, 2015

gnxtc2 said:
Currently have a 3" Sky RSK. I want to lower my truck to increase clearance over the bed for the GN trailer. If I convert to +'05 axles, would the height go down if I use stock coil springs?

Does the coil sprung front end ride better?

Thanks

Billy T.
[email protected]

The 6.4 truck I have driven on concrete highways seemed to ride a bit bit worse then my truck does with the current setup.

kmanxj · May 27, 2015

I think it would sit lower. I am running all stock 06 springs and I clear 315's but they are tight in the front. It is definitely the same height or shorter than a newer one ton truck.

Strokersace · May 27, 2015

FrankTheTank said:
It would be the same or around the same as a stock 350 truck. You can also buy the 4400lb gas truck coils (prolly closer to actual front weight anyway) to drop it even a few more inches. The front axle weight on my truck is 4800 and rear is 2400 as it sits on level ground for a referance

You still got my number? I can throw a few measurements at you

I'm running 4800lb coils and F250 2" rear blocks. Rear sits about 1.25" higher than front, so very little rake. Ride is amazing and overall height is lower than a stock F350. I wouldn't go any larger than a 33" tall tire on my setup. Towing clearance is awesome with this setup. Coming from a 4" lift with F350 rear blocks, I gained 5-6" of clearance for goosenecks.

Personally, I don't know if the 4400lb springs would give enough clearance between frame and axle. It'd be tight. I don't have bump stops installed but if I did, I'd only be a couple inches off them with my 4800's.

Billy if you want pictures, pm me your number. Or I can email them to you.

kmanxj · May 27, 2015

Which springs are which? Mine came from an f250 with the 6.0.

I have the 2" block in the back and mine sits about 1/4" higher in the front. I plan on an F350 rear block to get some rake back.

TyCorr · May 27, 2015

The front springs on the diesels should be the same. The rear block is different.

Strokersace · May 27, 2015

kmanxj said:
Which springs are which? Mine came from an f250 with the 6.0.

I have the 2" block in the back and mine sits about 1/4" higher in the front. I plan on an F350 rear block to get some rake back.

I bet you have 5600's. The true way to tell is the code off the door sticker of the donor vehicle. If not available, then there might be a part # tag on the coil itself. Otherwise, I'm not sure.

TyCorr · May 27, 2015

So the front coils arent the same? Or are you saying he might have coils off something other than a diesel donor truck?

Strokersace · May 27, 2015

Coils have different rates just the same as leaf springs. And they vary on diesels and on gassers. The typical ones I've seen on diesels is 5600 and 6200lb rates, however some came with 4800's. My 4800's came off a factory 2011 diesel. But the 4800's and 4400's are typically found on the gassers.

morefuel · May 27, 2015

I believe I have the 4400's. At least i told them I wanted front springs from a 5.4 gasser. The front rides quite nice. You do want to be careful about what bumps you hit or how fast you hit them. I have no bumpstops and I think i've only bottomed it out once when i didn't realize how aggressive of a bump it was. With bumpstops it would be perfect.

Strokersace · May 27, 2015

morefuel said:
I believe I have the 4400's. At least i told them I wanted front springs from a 5.4 gasser. The front rides quite nice. You do want to be careful about what bumps you hit or how fast you hit them. I have no bumpstops and I think i've only bottomed it out once when i didn't realize how aggressive of a bump it was. With bumpstops it would be perfect.

On your 97? Any pics? What rear blocks, if any? I'm curious of ride height compared to mine. I spent quite a bit of time out in Chico this last summer and fall.

TyCorr · May 27, 2015

Can you guys post up pics? I mean if you would please?

kmanxj · May 27, 2015

TyCorr said:
Can you guys post up pics? I mean if you would please?

of what?

heres my truck with 315 70 17 duratracs and I'm guessing 5600 springs.

Strokersace · May 27, 2015

Mine with 33x13.50s with -24 offset:

Same rims with 33x11.5s:

Pulling a load with no rear airbags, SD B-code rear springs, and velvet ride shackles:

Current setup with stock 2010 18" wheels and 33x11.5 tires. Airbags installed.

Can get better current pics soon.

TyCorr · May 27, 2015

That really changes the look/stance of the obs! Nice!

FrankTheTank · May 27, 2015

4800 lb coils came in the super cab short beds, and STD cabs with a diesel. Also depended on towing package, plow package, 250, 350, but yes.... lots of different spring rates.

Anyway, there should be a tag on the spring itself you can cross referance to a spring rate