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Old 06-23-2019, 08:39 PM   #1 (permalink)
cptdondo
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Chevy 4500 to 4x4

I got my Ambulance back from Advanced 4x4 in Salt lake. I had them raise it 3" and swap the worn out rubber to Kumho Road Venture M/T 235/85R16 tires. Kept the same rims and no spacers. We used the heaviest front end torsion bars available.
Front end is up about 5", rear end about 3". Drives much better, turns easier.

Took a hit on gas mileage but nowhere near as bad as I expected. 13.5 at 60-65, dropping severely at 70.

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Old 06-24-2019, 08:16 AM   #2 (permalink)
LCAC_Man
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With the (lack of) aerodynamics of the box you should be pretty happy with the 13.5mpg at 65. Those tires will be good in the dirt/snow but they'll hit the mpg's pretty hard for hwy driving.

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Old 06-24-2019, 10:03 AM   #3 (permalink)
cptdondo
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Oh yeah. I was surprised that I didn't take a hit. Before the conversion, lift, and bigger tires I was getting 13.7 MPG, so I'm quite happy.

The aerodynamics of a brick kinda limits the MPG.
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Old 06-24-2019, 05:42 PM   #4 (permalink)
Joey D
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Did they convert it to 4x4?
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Old 06-24-2019, 06:20 PM   #5 (permalink)
cptdondo
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Yes. 4x4 conversion, 3" lift, new steering and linkage, and new tires.
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Old 06-24-2019, 06:22 PM   #6 (permalink)
VIOL8TOR
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That's good mileage for all that's done to it...
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Old 06-24-2019, 06:31 PM   #7 (permalink)
Joey D
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Quote:
Originally Posted by cptdondo View Post
Yes. 4x4 conversion, 3" lift, new steering and linkage, and new tires.
Post up pictures of the front suspension if your up to it.
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16 GMC Savanna 3500 D Max
98 6.5 GM 2500HD, dynatrac pro rock 60 front, are, 4.56 gears,4 wheel disc brakes, RCV CV shafts, cross over steering with high steer, rear are, strait pipe, 37" BFG KM2's Telephone Turbo
06 Chevy Express D Max 5in MBRP, For sale
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Old 06-24-2019, 06:49 PM   #8 (permalink)
cptdondo
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Gotta wait for it to stop raining. I think I should have gotten pontoons rather than bigger tires......
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Old 06-25-2019, 09:25 PM   #9 (permalink)
cptdondo
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Pics of the front end conversion. It's basically a 3500 truck front end with some bracketry. It's a shift on the fly system from 2 hi to 4 hi.

This is with the 3" lift.
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Old 06-27-2019, 08:25 AM   #10 (permalink)
LCAC_Man
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The 3" lift is probably a life saver on this conversion, dropping the differential down so that it clears the engine makes everything fit better.

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