I am looking hard into either 3.73's or 4.10's but I was wondering what kind of impact they would have on my mpg? Mainly highway driving 70-80 mph. Thanks.

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00 Black Lightning
No mods yet
00 Honda Civic
01 Pontiac Grand AM GT

 

Aint the new 01 L's got 3.73s?

Just compare window stickers...

i would think with that small of a change, it wouldent change more than 1MPG

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97 Dakota CC, 318, Auto, 4x2
13.50@101.91

 

Installed 3.73's in my 99 and didn't see enough difference to worry about. RPM's at 70 MPH went up 200. Steve

 

MYREDTOY

Can you tell me how did it affect your launch and or ET ? What does it feel like on the street ?
Thx

 

I have trouble blowing the tires off now w/ stock 3.55's. Is it a lot worse with 4.10's?

I went from stock 3.27's to 4.10's in my 98 Cobra and I couldn't get any traction down low.

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99 Lightning, Bassani exhaust, JL Ram Air, Superchip(JL Programmed), Level 10 shift kit. No ET yet.
Sold- 98 Cobra. FM 2 Chamber, K&N, Steeda Triax, 4.10's, MAC offroad H. Best Cobra 1/4mile 13.8.
Sold- 96 Z28 ATI Procharged 13.5.

 

If you have to ask, you don't want them. I lost about 1 mpg.

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I'd rather have a bottle in front of me than a frontal lobotomy.

'84 Alan Record Carbonio, Aerospoke wheels, Campy brakes.
'00 SVT Lightning, silver, built 2/9/00, #133 of 4966, G-tech Pro, JBA headers, 4.10 gears, Swanson chip, Pro-M, NGK plugs, carbon drive shaft, Roadmaster suspension kit
13.39 @ 102.5
2001 Kevlacat 2400, twin 115 Evinrude FICHT, Raytheon VHF, radar, autopilot and GPS chartplotter/fishfinder.

gmvye@pacbell.net