3.55 vs. 3.73

CALDWELL · 11-23-2008, 10:23 AM

What exactly is the difference between 3.55 gears and the 3.73 gears ??

are the gears just simply longer through out the power band of the tranny ???

this may seem simple but i have been curious ??? would this be a good upgrade from a performance aspect ?

thanks boys !!

Danny

LBarr2002 · 11-23-2008, 10:45 AM

A 3.55 will give you a slightly higher top speed, slightly lower rpm at a given speed.
A 3.73 will give you slightly quicker acceleration, slightly higher rpm at a given speed.

Its definitely not worth the cost for the small difference in ratios. If you're looking for more power, better towing, quicker acceleration, think about 4.10's. There's no way I'd spend the money to go up from a 3.55 to 3.73, but a 4.10 I'd probably think about.

ericautopart · 11-24-2008, 11:13 AM

Saleen changes all of their mustangs from a 3.55 to a 3.73 so it's got to be worth somthing.

jrford · 11-24-2008, 11:45 AM

Another way to look at it:
3.55 - 3,500lbs towing
3.73 - 7,000lbs towing
About 200 rpm difference.

*techieman33* · 11-24-2008, 12:03 PM

Quote:

Originally Posted by ericautopart

Saleen changes all of their mustangs from a 3.55 to a 3.73 so it's got to be worth somthing.

On a sports car those little changes can add up, but in an explorer unless it's lifted or has had a lot of performance work done it's a waste of money. You could see a lot more benefits from investing that money in other parts of your explorer

11-23-2008, 10:23 AM	#1
CALDWELL Wannabe Elite Explorer Philadelphia Airport, PA 2005 V6 Silver XLT Join Date: Sep 2008 Posts: 1,894 Vehicle Specs (Original Poster)	3.55 vs. 3.73 What exactly is the difference between 3.55 gears and the 3.73 gears ?? are the gears just simply longer through out the power band of the tranny ??? this may seem simple but i have been curious ??? would this be a good upgrade from a performance aspect ? thanks boys !! Danny __________________ DANNY#2 SILVER 05 XLT Stage 2 Intake ~ Exhaust ~ Henson Performance Tunes ~ Luminic's Bulbs ~ Sound System ~ Bull Bar ~ Black Headlight Housings ~ 20% Tint ~ FD Lights/Siren ~ Remote Start

11-23-2008, 10:45 AM	#2
LBarr2002 Wannabe Elite Explorer Leesville, SC '91 XLT 4x4, '92 XLT 4x4 Join Date: Sep 2003 Posts: 1,507 Vehicle Specs	A 3.55 will give you a slightly higher top speed, slightly lower rpm at a given speed. A 3.73 will give you slightly quicker acceleration, slightly higher rpm at a given speed. Its definitely not worth the cost for the small difference in ratios. If you're looking for more power, better towing, quicker acceleration, think about 4.10's. There's no way I'd spend the money to go up from a 3.55 to 3.73, but a 4.10 I'd probably think about. __________________ '87 Samurai, Dana 44's, 5.89's, spooled '92 XLT and '91 XLT 4x4, both SOLD '04 LJ '01 Chevy 2500HD Duramax 4x4 - The Toy Hauler

11-24-2008, 11:45 AM	#4
jrford Wannabe Elite Explorer Birmingham, MI '10 Sport Trac Join Date: Mar 2005 Posts: 2,520 Vehicle Specs	Another way to look at it: 3.55 - 3,500lbs towing 3.73 - 7,000lbs towing About 200 rpm difference. __________________ Jim 2010 Mercury Mountaineer Premier, V8 AWD, 15k 2010 Sport Trac Limited, V8 4WD, 55k 2004 EB Quad Buckets V8 AWD, 105k

11-24-2008, 11:13 AM	#3
ericautopart Wannabe Elite Explorer Jersey Shore 1998 XLT 5.0L AWD Join Date: Feb 2008 Posts: 1,027 Vehicle Specs	Saleen changes all of their mustangs from a 3.55 to a 3.73 so it's got to be worth somthing.