Gearing concerns
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From: Salisbury
Gearing concerns
Alriight, so right now my front and rear axles are geared differently. The fronts at 3.50 and the rear at 2.73. The rear is way to high and the truck had no power.
I'm wanting to regear my rear and was gonna do 3.50 to match the front but at the same time, im wondering if 4.10 would be better for my setup. I don't want to regear the front to but if I have to I will. I'm running a 400 and a C6 transmission on 33s (may do 35s in future).
Would I be fine with the 3.50 gearing or should I put in the extra work to do 4.10s. I'll be using the truck for some towing and little highway use if I can. I can do 65 fine on the hwy now. Just figured I'd get some opinions. Thanks
I'm wanting to regear my rear and was gonna do 3.50 to match the front but at the same time, im wondering if 4.10 would be better for my setup. I don't want to regear the front to but if I have to I will. I'm running a 400 and a C6 transmission on 33s (may do 35s in future).
Would I be fine with the 3.50 gearing or should I put in the extra work to do 4.10s. I'll be using the truck for some towing and little highway use if I can. I can do 65 fine on the hwy now. Just figured I'd get some opinions. Thanks
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Can't speak technically about the re-gearing, but this link might be helpful to determine engine RPMs for highway use. Looks like 65 should be around 2700 rpm.
Reference Manual: Chapter 3: Axles: RPM calculation
Reference Manual: Chapter 3: Axles: RPM calculation
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From: Salisbury
Originally Posted by bsraborn
Can't speak technically about the re-gearing, but this link might be helpful to determine engine RPMs for highway use. Looks like 65 should be around 2700 rpm.
Reference Manual: Chapter 3: Axles: RPM calculation
Reference Manual: Chapter 3: Axles: RPM calculation
More Turbo
Joined: Apr 2007
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From: Salisbury, PA
With 33s or 35s you will be much happier with 4:11s unless you plan on driving it mostly highway.
3:50s would be OK but not really ideal. I have run 3:50s and 4:11s in Classic Broncos and these era trucks from 33" to 40" tires and the 4:11s are just soo much better for your normal stop and go traffic and getting up to speed quicker. Yes, at highway speed you will be a few hundred RPMs higher, but nothing the engine can't handle.
3:50s would be OK but not really ideal. I have run 3:50s and 4:11s in Classic Broncos and these era trucks from 33" to 40" tires and the 4:11s are just soo much better for your normal stop and go traffic and getting up to speed quicker. Yes, at highway speed you will be a few hundred RPMs higher, but nothing the engine can't handle.
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I figured rpms would be a little higher. I forgot to mention that I'm goin to an np435 here soon so I'm not too worried. Most of my driving is stop and go or on country roads goin 55 so I'm not too worried. 4.10 should be perfect for what I'll be using it for. Thanks again guys.
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