overdrive on or off? - Ford Mustang Forum
LinkBack Thread Tools
post #1 of 7 (permalink) Old 05-15-2006 Thread Starter
V6 Member
Red99Stang's Avatar
Joined: Apr 2005
Posts: 119
overdrive on or off?

ive always kinda wondered this....what exactly does the o/d button on my auto shifter do? i know it turns my o/d on and off but what does that mean? is the car necessarily faster with one or the other? which one should i have when im just cruising and which should i have when i want some speed or accelaration? this might be a stupid question...but i dont know that much!

Red99Stang is offline  
Sponsored Links
post #2 of 7 (permalink) Old 05-15-2006
BOSS Member
4.6L Member
GTRaptor's Avatar
Joined: Apr 2002
Location: Mexico
Posts: 4,459
Not a stupid question.

Your transmission is a 4 speed, the 4th gear is called overdrive, so you have R-1-2-3-OD

A transmission in which the highest gear ratio is less than a one-to-one ratio. This means the drive shaft turns faster than the engine crankshaft. The overdrive feature saves fuel and, because the engine runs slower, engine wear and noise are reduced.

On stop and go traffic at low speed (under 50mph) it is better to have OD OFF (to reduce shifts and internal clutch and overdrive band wear)

If you cruise at a constant speed leave OD ON

Rob Hernandez, AFM co-Founder.
GTRaptor is offline  
post #3 of 7 (permalink) Old 05-16-2006 Thread Starter
V6 Member
Red99Stang's Avatar
Joined: Apr 2005
Posts: 119
thanks...that answers a lot. so is one necessarily faster than the other like from a stop or from a roll?
Red99Stang is offline  
post #4 of 7 (permalink) Old 05-17-2006
PONY Member
V6 Member
GuitarstarX7's Avatar
Joined: Dec 2005
Location: Vista
Posts: 582
Send a message via AIM to GuitarstarX7
From a stop or roll, it will make no difference on or off, it just allows the transmission to shift into 4th (overdrive). If overdrive is off the transmission will only use the first 3 gears.

2004 3.9L/auto
-Mac CAI, 73mm Mass Air
-Dual Flowmaster 40s, H pipe, 2.25 in pipe
-42% Underdrive Pulleys
-SCT Tuned
-4.10 Gears & Trac-lok
GuitarstarX7 is offline  
post #5 of 7 (permalink) Old 05-17-2006
V6 Member
GreenStang511's Avatar
Joined: Apr 2004
Location: Princeton Area
Posts: 127
Is it typical in dragging the auto that you would want to lock out the 4th gear? More pull keeping it in 3rd or would that hurt the engine?

2003 Tropic Green Metallic 3.8L V6: MGW Interior Billet Accessories (knobs and pony shift), Bullitt Fuel Door, Silver Bullitt Rims w/245/45-17.
GreenStang511 is offline  
post #6 of 7 (permalink) Old 05-17-2006
SHELBY GT 500 Member
V6 Member
kscoyote's Avatar
Joined: Aug 2002
Location: Topeka
Posts: 11,432
Originally Posted by GreenStang511
Is it typical in dragging the auto that you would want to lock out the 4th gear? More pull keeping it in 3rd or would that hurt the engine?
no, it won't hurt the engine at low speeds. forcing it to scream would affect the life of the engine . ..

Gas mileage may suffer, as well . . .

Woe to him who builds his palace by unrighteousness,his upper rooms by injustice,making his countrymen work for nothing...Does it make you a king to have more and more cedar?Did not your father have food and drink?He did what was right and just,so all went well with him. He defended the cause of the poor and needy,and so all went well...But your eyes and your heart are set only on dishonest gain,on shedding innocent blood and on oppression and extortion. Jer 22:13, 15-17
kscoyote is offline  
post #7 of 7 (permalink) Old 05-21-2006
MustangHarry_94's Avatar
Joined: Apr 2006
Posts: 31
i pretty much never touch that button.
MustangHarry_94 is offline  
Sponsored Links
Closed Thread

Quick Reply

Register Now

In order to be able to post messages on the Ford Mustang Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a VALID email address for yourself, otherwise you will not receive the necessary confirmation email needed to confirm, validate and activate your new AFM member account.

Failure to provide a VALID email address, will result in the cancellation of your new AFM member account registration.

Email Address:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page

Similar Threads
Thread Thread Starter Forum Replies Last Post
Overdrive Pulley? h3llsang3l V6 Talk 7 09-18-2009 06:58 AM
What computer with C4 Tranny (no overdrive) More inside..... mybronco2.com 5.0L Tech 4 05-17-2006 07:09 PM
Overdrive Question MustangHuggy V6 Talk 25 08-07-2004 02:42 AM
Overdrive for my C6 transmission Wings Classic Tech 5 07-28-2004 03:04 AM
Overdrive BackDraft 5.0 5.0L Tech 2 11-29-2003 05:35 AM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are On

For the best viewing experience please update your browser to Google Chrome

Search Engine Friendly URLs by vBSEO 3.6.1