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11-22-2014, 01:06 PM
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#1 |
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Registered User
Join Date: Apr 2011
Location: Napa California
Posts: 47
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Gear Ratio and AOD
I looked at an 85 Chevy 4x4, nice looking truck but it had a few issues.
One thing I questioned was gears, it has a overdrive automatic trans (700r4 I assume) and I asked the owner what gear ratio in the axles , he didnt know so I looked at the option list on the glove box door and it said it has 2.73 to 1. This dosn't sound right 2.75 gears with a overdrive trans. |
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11-22-2014, 01:15 PM
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#2 |
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Registered User
Join Date: Feb 2012
Location: pleasant valley--placerville ca
Posts: 3,039
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Re: Gear Ratio and AOD
probably 3.73---57halfton---I lived in napa for 34yrs moved back to the country 8yrs ago.
__________________
1961 chevy K10 my build is------------61K10 build |
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11-22-2014, 05:37 PM
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#3 |
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Registered User
Join Date: Mar 2014
Location: CA
Posts: 168
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Re: Gear Ratio and AOD
Nope sounds about right. My 86 k10 had 3.08's stock and my 84 k5 4x4 has 2.73's. The k10 is federal emissions and the k5 is ca emissions with the tps carb, o2 sensor, map sensor and mixture control solenoid. 2.73 is a good highway gear but kind of a pig around town.
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11-22-2014, 06:09 PM
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#4 |
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Registered User
Join Date: Jun 2012
Location: cibolo tx
Posts: 1,033
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Re: Gear Ratio and AOD
drive it in 4 low. ought to feel about right then lol 273s. cmon gm.
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11-22-2014, 08:16 PM
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#5 |
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Registered User
Join Date: Apr 2011
Location: Napa California
Posts: 47
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Re: Gear Ratio and AOD
I figured with an automatic overdrive trans that the gear ratio would be like 3.73's or 4.10's. 2.73's w/ an AOD seems like it would be an awful tall gear.
I don't know if this means anything but my 2006 Silverado 2500 has an AOD with 4.10 gears and crusing down the hiway at 70 mph its taching around 2300/2400 rpm. Gene |
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11-22-2014, 08:38 PM
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#6 |
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Special Order
  
Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,863
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Re: Gear Ratio and AOD
3.42s is as tall as I'd want with O/D,manual or automatic...in a 2wd with street tires. I can't imagine a dog with 2.73s, O/D, and 33" or more tires. Even if it could stay in O/D much it would probably suck more fuel than shorter gears...unless on flat ground doing 80+ mph. Isn't AOD Ford terminology?
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"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ |
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11-22-2014, 08:56 PM
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#7 |
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Registered User
Join Date: Apr 2011
Location: Napa California
Posts: 47
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Re: Gear Ratio and AOD
Yeah your right AOD is Ford but its faster than typing automatic overdrive transmission, guess I could have said 700r4. Oh well everyone seemed to know what I typing.
Gene |
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11-22-2014, 11:47 PM
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#8 |
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Special Order
Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,863
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Re: Gear Ratio and AOD
Yeah they did and so did I. Was just messing you and acting like a GM Truck guy would. I've seen worse, like guys calling my Blazer a Bronco. That's ok, everyone calls Ford Stylesides and Dodge Utilines Stepsides,so there!
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"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ |
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