Gears gears gears...

Vector · 05-19-2005, 11:50 PM

Everyone is talking about how great a new set of gears can be. But what is involved with installing a new set? Is it a DIY? Is it easy to mess up the differential? What about calibrating the speedometer afterwards? Also what kind of a gas mileage hit would you expect going from stock to say, 4:10s?

83GTMUSTANG · 05-20-2005, 01:52 AM

Lets Say You Got A Ten Speed And Your Stock Gear Is Like The Hard Gear An A 3.73 ,4.10 ,ect Is Like The Easy Gear ,...........an Imagine Your Legs Is The Motor Thats The Pros An Cons Of Having A Gear You Have A Lot Of Acceleration But At The Cost Of Quicker Shifts An Higher Rpms On Freeway Rides An You Will Lose Atlease 4 Mpg With 4.10;s Depending On What Gears You Started With......an Its Not Hard To Do Your Self If You Can Take It Off You Can Put It Back On Or Shell Out Bout 300 Bux For Some One Else To Do It But If You Do It You'll No Its Done Right............4.10's For Auto An 3.73's 5 Speed For Daily Drivers Like Mine................

GhettoPop · 05-20-2005, 08:23 AM

in general for a daily driver, 3.73's are good w/ stick, 4.10's w/ automatics. as for gas mileage, you highway MPG will go down a little as you will be cruising at higher rpm's. as for around town, if you don't mash the gas on every light and let the torque push you along, you may not see any decrease in city MPG.

as for installation, unless you are fairly skilled in rears, i would consider having a good shop install it as a sub-par install will lead to rear chatter and headaches

~The Jester~ · 05-20-2005, 08:27 AM

I agree with 83 right up until the last sentence. I have 4.30's in mine, 5 speed Tremec. I think the OD in the 5 speeds let's you get away with more gear. I ran 4.10's in her for 2 years, and had absolutely NO issues on the freeway.

Click on the "analyzer" button in here, there's an awesome calculator for figuring out engine speed/car speed/rear gears. You'll be surprised how steep of a gear you can get away with.

Don't Fear The Gear!

rwhite65 · 05-20-2005, 12:06 PM

I would let a shop do the install....just my .02.
Ryan

05-19-2005, 11:50 PM	#1
Vector Registered Member Join Date: Jul 2001 Location: Comox, BC, Canada Posts: 119	Gears gears gears... Everyone is talking about how great a new set of gears can be. But what is involved with installing a new set? Is it a DIY? Is it easy to mess up the differential? What about calibrating the speedometer afterwards? Also what kind of a gas mileage hit would you expect going from stock to say, 4:10s?

05-20-2005, 01:52 AM	#2
83GTMUSTANG N-V-ME Join Date: May 2005 Location: SOUTHFIELD,MICHIGAN Posts: 155	Re: Gears gears gears... Lets Say You Got A Ten Speed And Your Stock Gear Is Like The Hard Gear An A 3.73 ,4.10 ,ect Is Like The Easy Gear ,...........an Imagine Your Legs Is The Motor Thats The Pros An Cons Of Having A Gear You Have A Lot Of Acceleration But At The Cost Of Quicker Shifts An Higher Rpms On Freeway Rides An You Will Lose Atlease 4 Mpg With 4.10;s Depending On What Gears You Started With......an Its Not Hard To Do Your Self If You Can Take It Off You Can Put It Back On Or Shell Out Bout 300 Bux For Some One Else To Do It But If You Do It You'll No Its Done Right............4.10's For Auto An 3.73's 5 Speed For Daily Drivers Like Mine................ __________________ 88' LX MUSTANG: LINCOLN ROTORS , AIR SUSPENSION FRONT AND REAR, SUBFRAMES, ROLL CAGE, 92' BLOCK, MSD 6AL, ACCEL 8.8 WIRES, ACCEL COIL, EDELBROCK F4B INTAKE (PORTED),2 IN. 4 HOLE SPACERS, HOLLEY 600 CARB.,HOLLEY BLUE FUEL PUMP AN REGULATOR, E 303 (.498 IN. 220 DUR.) CAM, (.535 IN. OF LIFT W/ 1.72 SCORPIN ROLLER ROCKERS), PORTED E7'S, FLOWTECH 1 5/8 LONG TUBE HEADERS, 2 1/2 IN. H PIPE, 2 CHAMBER FLOWMASTERS WITH 3 IN.DUMPS, T-5, 3.73 GEARS, 5 LUG AEROSTAR AXELS, 245-45-17 96' COBRA WHEELS

05-20-2005, 08:23 AM	#3
GhettoPop Gimme a Drink! Join Date: Dec 2002 Location: NYC Posts: 694	Re: Gears gears gears... in general for a daily driver, 3.73's are good w/ stick, 4.10's w/ automatics. as for gas mileage, you highway MPG will go down a little as you will be cruising at higher rpm's. as for around town, if you don't mash the gas on every light and let the torque push you along, you may not see any decrease in city MPG. as for installation, unless you are fairly skilled in rears, i would consider having a good shop install it as a sub-par install will lead to rear chatter and headaches __________________ 1990 GT,stock T-5,K&N w/o air silencer,March underdrives,FMS wires,timing@14*,PA Perf 130amp alt,Steeda Tri-Ax Shifter,Steeda adj quadrant/clutch cable/firewall adj,Centerforce II clutch,o/r x-pipe,Magnaflow SS catback,g-load brace, subframes,Bilstein struts/shocks,Autometer gauges, 136k and running strong!

05-20-2005, 08:27 AM	#4
~The Jester~ Rat Killer Join Date: Aug 2002 Location: Cold ass Ohio Posts: 1,143	Re: Gears gears gears... I agree with 83 right up until the last sentence. I have 4.30's in mine, 5 speed Tremec. I think the OD in the 5 speeds let's you get away with more gear. I ran 4.10's in her for 2 years, and had absolutely NO issues on the freeway. Click on the "analyzer" button in here, there's an awesome calculator for figuring out engine speed/car speed/rear gears. You'll be surprised how steep of a gear you can get away with. Don't Fear The Gear! __________________ d-Con Racing "Nothing fancy, just 347 inches of RAT POISON!" MICE need not apply.....

05-20-2005, 12:06 PM	#5
rwhite65 Ride Hard Join Date: Oct 2000 Location: Wyoming IL Posts: 1,094	Re: Gears gears gears... I would let a shop do the install....just my .02. Ryan __________________ 65 Fastback 91 roller 306, H/C/I AOD-Bauman, PI Stallion, 4.10's and traction loc 04 Grand Cherokee Freedom Edition 79 Ford F-250 4x4 - Restored

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Gears Gears Gears!!!!	COBRAon18s	Modular Madness	20	05-13-2002 04:44 PM
how can you tell what size gears you have?	Kamaro Killer	Windsor Power	7	04-03-2002 02:55 PM
superchargers and gears... combo?	SCOTTLT79	Windsor Power	4	05-31-2001 08:55 PM
Gears, need help!!!!	Edgar Negron	Windsor Power	3	05-27-2001 03:10 PM
Gears Gears Gears	Skyman	Windsor Power	6	03-11-2001 11:39 PM