04-08-2012, 11:24 PM | #1 |
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Location: river falls, Wisconsin
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what gear ratio?
ok guys what gear ratio are you running? right now i have a 92 2wd rcsb, 383/nv3500 with 3:08 gears i want to swap rear ends to either 3:42 or 3:73 but dont want to run down the freeway at 3000rpm if i go to high. right now at 70mph it is just under 2000rpm but is slow off the line. let me know what you guys think.
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04-09-2012, 04:53 PM | #2 |
One day...
Join Date: Apr 2008
Location: Tuttle, Ok
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Re: what gear ratio?
3:73, cruises about 2500 @70mph but could be a little off because its been a while since i drove it
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04-09-2012, 10:42 PM | #3 |
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Re: what gear ratio?
My 94 Burb with 3:73's is at 2200 at 70MPH. My preference is for 3:42's so that you are at 2000 at 70MPH and your fuel mileage is a lot better around town cause the truck doesn't rev as high between shifts.
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04-11-2012, 07:48 PM | #4 |
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Location: Hartland, MI
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Re: what gear ratio?
I have 3.73s in my truck and hate them with a passion, but I tow with it.
I would kill for a set of 3.08s for my truck but SF 14B only go down to 3.42s. |
04-11-2012, 11:59 PM | #5 |
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Location: Shasta Lake, CA.
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Re: what gear ratio?
I've got 3.73's with 30" tires and I tow with it. Its just rite for my Tahoe and its a rocket off the line.
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04-12-2012, 01:45 AM | #6 |
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Location: lacygne, kansas
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Re: what gear ratio?
i got the 3.42 in my truck and i get 21 hwy at 2300RPM even with my truck being a 4x4 heavy half w/ a mild built 355 and off road tires
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04-12-2012, 08:01 AM | #7 |
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Re: what gear ratio?
I have a 3.08 and it is a dog off the line. I just got a newer diff. with 3.42 gears and posi but have yet to put it in. I can't wait to try it !!!
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04-12-2012, 12:40 PM | #8 |
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Re: what gear ratio?
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04-12-2012, 03:22 PM | #9 |
Parts and more parts
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Re: what gear ratio?
give the tire size and which tranny you have.
My 91 Chevy had a 3.42 geared rear end with a 700 R4 OD tranny. I ran a lower profile tire that was at 28" tall. This gave me an RPM of 2050 to 2100 at 70 MPH. That worked great for this combination and I averaged 19 mto 20 MPG with the truck.
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04-15-2012, 09:15 AM | #10 | |
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Re: what gear ratio?
Quote:
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04-15-2012, 09:18 AM | #11 |
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Location: river falls, Wisconsin
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Re: what gear ratio?
Right now I am running a nv3500 5 speed with 275/55/15 rear tires. I would like to swap the 5 speed for a 700r4 down the road.
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