Transmissions and Drivetrain Need help with your trans? Problems with your axle?

Gearbox symbols

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Old May 5, 2010 | 12:50 PM
  #1  
crazyeight's Avatar
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Joined: Apr 2010
Posts: 33
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From: Sweden
Car: Pontiac Firebird 1987
Engine: 305 4bbl
Gearbox symbols

Here comes a little noob question

On my gearbox i got the symbols P, R , N ,D ,D ,1 2

One of the Ds got a circle or a thin line around it.

What is this?

Is one of them overdrive or something?

And hoe does this work?
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Old May 5, 2010 | 02:17 PM
  #2  
robguitargod1's Avatar
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Joined: Oct 2008
Posts: 857
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From: Niles, IL
Car: '91 LS6/T56/9"
Engine: LS6
Transmission: T56
Axle/Gears: Currie 9"/4.11, detroit truetrac
Re: Gearbox symbols

Originally Posted by crazyeight
Here comes a little noob question

On my gearbox i got the symbols P, R , N ,D ,D ,1 2

One of the Ds got a circle or a thin line around it.

What is this?

Is one of them overdrive or something?

And hoe does this work?
Man that's most noob question I've ever seen! But we all start somewhere so I won't ridicule you like most others will.

1= 1st gear
2= 2nd gear
D= 3rd gear
(D)= 4th gear (overdrive)

So drive the car in (D) (overdrive) that way you'll save fuel. An overdrive gear simply reduces your engine RMP at higher speeds, thus allowing the engine to not work so hard, and saving fuel. You have a 4-speed overdrive automatic AKA 700R4 transmission.

No question to too dumb to ask so never hesitate.
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Old May 5, 2010 | 02:22 PM
  #3  
robguitargod1's Avatar
Senior Member
iTrader: (4)
 
Joined: Oct 2008
Posts: 857
Likes: 5
From: Niles, IL
Car: '91 LS6/T56/9"
Engine: LS6
Transmission: T56
Axle/Gears: Currie 9"/4.11, detroit truetrac
Re: Gearbox symbols

Originally Posted by crazyeight
Here comes a little noob question

On my gearbox i got the symbols P, R , N ,D ,D ,1 2

One of the Ds got a circle or a thin line around it.

What is this?

Is one of them overdrive or something?

And hoe does this work?
Also is your handle 'crazyeight' a reference to 'Breaking Bad?' If so I'm the biggest fan of that show!
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Old May 5, 2010 | 02:23 PM
  #4  
crazyeight's Avatar
Thread Starter
Junior Member
 
Joined: Apr 2010
Posts: 33
Likes: 0
From: Sweden
Car: Pontiac Firebird 1987
Engine: 305 4bbl
Re: Gearbox symbols

Hehehe

Well this is my first car with this kind of automatic gearbox
Had a valiant before but it was not like this at all


Thx for answer
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Old May 5, 2010 | 02:25 PM
  #5  
crazyeight's Avatar
Thread Starter
Junior Member
 
Joined: Apr 2010
Posts: 33
Likes: 0
From: Sweden
Car: Pontiac Firebird 1987
Engine: 305 4bbl
Re: Gearbox symbols

Dont know where i got the nick from but i have had it for a long time. But im also a fan of braking bad
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