Tech / General Engine Is your car making a strange sound or won't start? Thinking of adding power with a new combination? Need other technical information or engine specific advice? Don't see another board for your problem? Post it here!
Sponsored by:
Sponsored by: CARiD

Auto Shifting

Old Apr 19, 2002 | 01:41 AM
  #1  
maverick544's Avatar
Thread Starter
Senior Member
 
Joined: Dec 2001
Posts: 719
Likes: 0
From: Zephyrhills, FL. from Rochester, NY
Auto Shifting

Guys I just want to make sure of something. When shifting in a auto w/ overdrive. Overdrive has the box, and plain old drive has just the D. And D is gear 1, 2, 3 and Overdriver is 4th right. Overdrive also is suppose to save gas, so if I always drive in overdrive I wont have and tranny problems right.
Reply
Old Apr 19, 2002 | 02:21 AM
  #2  
84 Z-28 350's Avatar
Senior Member
20 Year Member
 
Joined: May 2001
Posts: 698
Likes: 1
From: Houston TX
Car: 84 Z-28 Camaro, 2022 2500 silverado
Engine: 383
Transmission: T-56
Axle/Gears: richmond 3.73, eaton posi
when you are in drive all it dose is lock out overdrive, thats is if your driving on a road that has a speed limit (what's that???) of say 35 your sposted to keep it in D so the tranny isent shifting back and fourth and your converter isent locking and unlocking. bacically if your not having a problem with it going back and fourth between gears just leav it in OD, I alawas did and never had a problem (til I swiched to a manual, now my racing clutch keeps blowing my slave cylenders out, damn pain in the *** cheap GM slave cylenders that cost $150)
Reply
Old Apr 19, 2002 | 04:22 AM
  #3  
Blackened's Avatar
Senior Member
 
Joined: Jan 2002
Posts: 661
Likes: 1
Go to AutoZone and get one of their italian made aluminum ones. That's what I got for mine and it's been troublefree for a while (well at least until I took the T5 out!) hehe
Reply
Old Apr 19, 2002 | 04:35 AM
  #4  
Jza's Avatar
Jza
Moderator
 
Joined: Jul 1999
Posts: 4,384
Likes: 2
From: Tulsa, OK
Originally posted by 84 Z-28 350
when you are in drive all it dose is lock out overdrive, thats is if your driving on a road that has a speed limit (what's that???) of say 35 your sposted to keep it in D so the tranny isent shifting back and fourth and your converter isent locking and unlocking. bacically if your not having a problem with it going back and fourth between gears just leav it in OD,
This is basically what the owner's manual instructs. pg. 2-17: "You should also shift to "D" if you notice what feels like excessive shifting between ranges....is normal under certain driving conditions [right around 35mph]; shifting from OD to "D" should bring improvement. (When driving conditions change, shift back to OD for improved fuel economy.)"
Reply
Old Apr 19, 2002 | 07:08 AM
  #5  
camaro6spd's Avatar
Supreme Member
 
Joined: Jan 2001
Posts: 2,463
Likes: 0
From: Annandale,NJ
Yeah, i busted 2 GM plastic POSs and went out and got an Alum one from CarParts F/X......MUCH betta.
Reply
Old Apr 19, 2002 | 08:42 AM
  #6  
dps8315's Avatar
Member
 
Joined: Jan 2002
Posts: 113
Likes: 0
From: Mishawaka, Indiana
3 spd / 4 spd overdrive

My girlfriend has a Celica GT with push button, on the fly Overdrive selection. Is the purpose of something like that performance oriented?

If you've got a 3 spd auto vs a 4 spd auto, same car otherwise, which one will win? It's like, the 4 spd will probably pull a little longer (overall time), and it won't top out on its gears, but on the other hand, a 3 spd is already pulling 1:1 while the 4 spd is still clunking through the gears...

Just a thought, wonderin if anyone has the solution.

James
Reply
Old Apr 19, 2002 | 09:09 AM
  #7  
Mark A Shields's Avatar
Supreme Member
20 Year Member
 
Joined: Jan 2001
Posts: 7,164
Likes: 1
From: Someone owes me 10,000 posts
Car: 99 Formula
Engine: LS1
Transmission: T56
Axle/Gears: 342
For around town sometimes it would be best for the tranny to leave it in D, if the it is shifting in and out of OD due to low speeds.
Reply
Old Apr 19, 2002 | 02:48 PM
  #8  
84 Z-28 350's Avatar
Senior Member
20 Year Member
 
Joined: May 2001
Posts: 698
Likes: 1
From: Houston TX
Car: 84 Z-28 Camaro, 2022 2500 silverado
Engine: 383
Transmission: T-56
Axle/Gears: richmond 3.73, eaton posi
next time I blow it out I'll have to try one, it will be about a month, by the way how much are they?
Reply
Old Apr 19, 2002 | 06:14 PM
  #9  
TomP's Avatar
Supreme Member
 
Joined: Mar 2000
Posts: 13,414
Likes: 6
From: Central NJ, USA
Car: 1986 Firebird
Engine: 2.8 V6
Transmission: 700R4
...just a technical note; the torque convertor can still go into lockup mode while the stick's in Drive.
Reply
Old Apr 20, 2002 | 02:08 AM
  #10  
Zepher's Avatar
Supreme Member
iTrader: (1)
 
Joined: Feb 2000
Posts: 7,964
Likes: 4
From: Norfolk, VA. USA
Car: 86 Trans Am, 88 Formula
Engine: 95LT4, 305TPI
Transmission: T56, T5
Just a side note, a 95 Supra TT Auto will only do 141mph in Drive.
Click the O/D on and you can go faster.
I was able to hit 155mph a few times before I ran out of road AND the car was still pulling hard.
Reply
Old Apr 20, 2002 | 02:14 AM
  #11  
Mark A Shields's Avatar
Supreme Member
20 Year Member
 
Joined: Jan 2001
Posts: 7,164
Likes: 1
From: Someone owes me 10,000 posts
Car: 99 Formula
Engine: LS1
Transmission: T56
Axle/Gears: 342
Originally posted by Zepher
Just a side note, a 95 Supra TT Auto will only do 141mph in Drive.
Click the O/D on and you can go faster.
I was able to hit 155mph a few times before I ran out of road AND the car was still pulling hard.
You're nuts!
Reply
Old Apr 20, 2002 | 03:15 AM
  #12  
Zepher's Avatar
Supreme Member
iTrader: (1)
 
Joined: Feb 2000
Posts: 7,964
Likes: 4
From: Norfolk, VA. USA
Car: 86 Trans Am, 88 Formula
Engine: 95LT4, 305TPI
Transmission: T56, T5
Originally posted by Mark A Shields


You're nuts!
You think?

My goal is 200+ in my 86 Trans Am, I'll get there eventually.
Reply
Old Apr 20, 2002 | 09:27 AM
  #13  
Twistopher's Avatar
Senior Member
 
Joined: Feb 2002
Posts: 500
Likes: 0
From: Bristow, VA
Car: 91 Z28 Convertible
Engine: 305TPI
Transmission: 700R4
Originally posted by Zepher

You think?

My goal is 200+ in my 86 Trans Am, I'll get there eventually.

*pictures coyote strapping a rocket to his back*
Reply
Old Apr 20, 2002 | 06:00 PM
  #14  
dps8315's Avatar
Member
 
Joined: Jan 2002
Posts: 113
Likes: 0
From: Mishawaka, Indiana
maybe more a hypothetical..

Certainly not related to the original 3spd vs overdrive,

but Zepher, do you really feel that you'll pull 200+ with all that extra sound-system weight?

One of the most ridiculous parts about Fast and the Furious (other than the makes/models of cars? ) was all those guys racing with under-chassis neons and a set of 12s...

or is it not enough to make a significant difference?

James
Reply
Old Apr 20, 2002 | 06:22 PM
  #15  
Zepher's Avatar
Supreme Member
iTrader: (1)
 
Joined: Feb 2000
Posts: 7,964
Likes: 4
From: Norfolk, VA. USA
Car: 86 Trans Am, 88 Formula
Engine: 95LT4, 305TPI
Transmission: T56, T5
My sound system isn't that much, I've got one 12" JL 12W6 in a small box and 2 small amps in a small amprack and my JVC headunit.
For a top speed run, weight isn't the main concern, it is drag coefficient, lots of horsepower, and gearing.
Reply
Old Apr 20, 2002 | 08:41 PM
  #16  
racereno's Avatar
Member
 
Joined: Feb 2002
Posts: 403
Likes: 0
From: Smokey Mountains, NC
Car: 91 Camaro RS
Engine: 305 TBI
Transmission: Auto
Axle/Gears: Stock
You are correct maverick544 and you can almost always just put 'er in OD and drive. I downshift to Drive when going down long hills (especially my local speed trap) or when I'm driving in the mountains.
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
junior419
TBI
14
Apr 7, 2025 11:35 AM
F-body driver
Transmissions and Drivetrain
17
Mar 6, 2023 11:44 AM
rubblerubble
Transmissions and Drivetrain
18
Mar 13, 2016 06:57 PM
AmpleUnicorn88
Interior Parts Wanted
16
Nov 29, 2015 05:45 PM
AmpleUnicorn88
Interior
12
Sep 24, 2015 09:15 AM


Thread Tools
Search this Thread

All times are GMT -5. The time now is 06:22 AM.