Welcome to CamaroZ28.Com, the ultimate Source for Camaro enthusiasts! Here you can join over 90,000 Camaro enthusiasts from around the world discussing all things related to Camaros and more. You are currently viewing as a guest which gives you limited access to view discussions
To gain full access to our forums you must register for a free account. As a registered member you will be able to:
Participate in over 40 different forums and search/browse from over 5 million posts.
The stock Z28 rearend (2.73) for automatics, and 3.42 for six speeds were installed by GM for one purpose only, "FUEL ECONOMY" to get around the gas guzzler tax. The term "Performance Axel" (i.e. "GU5") option for the automatic, is a joke. The only cool thing you get is the aluminum drive shaft with that option.
IMHO, to get the car to perform the way it should (i.e. getting into the "power curve"), the automatics should have a 3.73 ring & pinion, and the six speeds should have a 4.10.
You car won't be "faster"... it may actually be "slower", but "quicker". Man, for someone who knows so little, I'm totally filled with smart-a$$ answers, aren't I?
Being "fast" usually refers to top speed -- which actually will decrease in theory when you go with a lower gearing in a car that is gearing limited instead of drag limited. I'm thinking that doesn't apply to the f-body automatics so I don't know how it would directly affect your top speed.
As for what gearing means... the most simple way to explain it is that it's the ratio of times that your drive shaft will spin compared to your tires. For example, 4.10 gears in your rear end will mean that your driveshaft will spin 4.1 times for every 1 time your tires rotate.
What this means for you is simple... think of your gears as a complicated lever system. You know how the little kid can lift the fat guy on the seesaw if the little kid is way on the end and the fat guy is near the fulcrum? The little kid is lifting WAY more weight but he is also moving a significantly longer distance than the fat guy is being lifted. So... when the driveshaft spins more times in relation to the tires, it's moving a longer distance but think of it as putting more "power" to the ground (for lack of a better term).
2002 Trans Am WS-6
M6, Pewter, Flowmaster 80 Series, Free Ram Air, and CAGS eliminator (FINALLY!)
ASC Conversion: #10502 on 6/26/02
<font face="Verdana, Arial" size="2">Originally posted by jgkinsofla: Is 3.73 too high for a daily driven automatic? I was leaning towards 3.42 - right now, I got the stock 2.73. What about the torque converter and drive shaft - upgrade also at the same time?
no get a converter FIRST. Gears may suddenly seem less necessary!
2000 Z28-Deep Maroon
Mac Headers With Off-Road Pipe
Vigilante Torque Converter 2800 stall 2.5 STR
Hooker 3" catback w/cut out & McCord
Dynamic Motorsports SFC's
2000 Z28 Deep Maroon
Comp Cams 224 114 .561/.561 \Jet Hot Headers \U.S. series 2 -Strange 3.73 gears\TA Girdle\Lakewood LCA's\LS1 EDIT\Nitto Drag radials\ Vigilante torque converter(2800 stall & 2.5 str)\True Dual exhaust w 2.5 pipes-X pipe and full magnaflow mufflers & Stock Style Stainless Tips\Fasttoys ram air\K&N filter \Whisper Lid
Dynamic Motorsports SFC's\Grill Mod \Tunes by Crunch\My Web Site