YaY!
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Joined: Aug 2009
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Either way, I'm still happy about it because 3.07 gearing should keep me satisfied for awhile until I start hitting the hp numbers I'd like to get to.... For now though, finishing the body work and getting all the little kinks worked out is my main focus.
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Joined: Mar 2004
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From: Northern VA
Safety Car
Joined: Jan 2004
Posts: 3,783
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From: Northern California
G92 - Performance axle.
G44 - 3:07 gear ratio.
My 89 had the 3:07 gear ratio which would light up the rear tires effortlessly (scary in the rain). My 91 has the 2:59 gear ratio which is not as quick on take off but, gets a lot better gas mileage (3:07=16.8 mpg combined city/highway 2:59=19.7 mpg combined city/highway) and is Great when the transmission downshifts on the highway!
G44 - 3:07 gear ratio.
My 89 had the 3:07 gear ratio which would light up the rear tires effortlessly (scary in the rain). My 91 has the 2:59 gear ratio which is not as quick on take off but, gets a lot better gas mileage (3:07=16.8 mpg combined city/highway 2:59=19.7 mpg combined city/highway) and is Great when the transmission downshifts on the highway!
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Joined: Apr 2008
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From: middle of Illinois
My 92 had the G44/G92 codes for performance 3.07 axle, and it always averaged around 22-23 mpg, but now with an upgraded camshaft and 3.73 gears, it only gets 20-21 mpg. That's combined, but probably 70% highway.
Drifting
Joined: Jun 2002
Posts: 1,945
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From: Corinth TX
As was mentioned, the way to find your Gear Ratio in an automatic is to drive at 60 mph. The reason for driving at 60mph is that your gearing (3rd gear) should be at 1:1 at that speed. So driving at 60mph you would be at 2700 rpms if you had 2.70 gears or 2590 rpms for 2.59 gears.
http://www.usgear.com/dr_ratio.htm
Hope this helps some. Changing from your OEM tire/wheel size will affect this and should be taken into account.
http://www.usgear.com/dr_ratio.htm
Hope this helps some. Changing from your OEM tire/wheel size will affect this and should be taken into account.
Race Director
Joined: Dec 2007
Posts: 10,068
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From: Elgin, IL
Gear ratios on these units were 3.06 1st gear, 1.63 2nd gear, 1.00 3rd gear, .070 4th gear.
If you do the estimated math using your 1700rpm and the 0.70 ratio of fourth then you get around 2429rpm. So with the rough estimation of your 1700rpm to begin with you are probably running the 2.59 gears because it should come up at 1813. Make sense.
If you were running the 3.07 gears then in fourth gear it should be around 2149. A good amount of difference as you can see. Just imagine what it would be like with 3.54 gears.
Melting Slicks
Joined: Feb 2005
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From: Sebastian Florida
St. Jude Donor '06
Pro
Joined: Apr 2008
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From: middle of Illinois
