GM Truck Club
THE PREMIER CHEVY TRUCK & SUV FORUM
Founded in 2004 ~ We're the #1 Chevy Truck & SUV Forum.
Silverado & Sierra | Tahoe & Yukon | Suburban & Yukon XL | SUV & CROSSOVER
Page 1 of 2 12 LastLast
Results 1 to 10 of 12
  1. #1
    Jr. Mechanic GrizzlyTN's Avatar
    Join Date
    Jun 2010
    Location
    Jackson Tennessee
    Posts
    130

    Default Everyday driving without Overdrive

    Other than gas mileage does it hurt the transmission in any way to drive in 3rd all the time? When I'm on the interstate and I have it in 4th (Overdrive) it's constantly shifting down and losing speed.

    I put it in 3rd and it runs about 30 degrees cooler on the transmission and drives MUCH better.

    I also have been driving in 3rd around town, very rarely driving in 4th (overdrive) anymore.

    I'm not a mechanic but it makes sense that if the transmission is running 30 degrees cooler even at interstate speeds it wouldn't be damaging anything.

    Any help would be appreciated guys
    2012 Chevy Silverado Z71 4x4 5.3
    Rough Country 2.5' Lift/Level
    Chevy 18's on Toyo Open Country MT 33's
    DiabloSport Trinity Tuner with Custom Tune from Lew
    Debating on AMP Research Powersteps

    2008 GMC Sierra WT 4x2 4.3

    3" Rough Country Suspension Lift w/Control Arms
    Super 44 Flowmaster Straight Dual Exhaust from the Cat Back with 18" Chrome 3.5" Exhaust Tips.
    Moto Wheels 951 18" on Nitto Mud Grappler 33's
    Infinity Kappa Perfect 6.1 System with Kenwood 5.1 amp using Stock Headunit.

  2. #2

    Default

    Shoudn't harm anything mechanically, just your wallet.

    I would find out why OD is doing that though, has it done it since you put the 33's on there, or is this a recent thing?

    2009 Silverado 1500
    5.3L / 3.73 G80 / 4spd / 4x4 / LWB/ Ext Cab / HD Tow-Haul
    2.25in ReadyLift Level Kit / 3in blocks/ 3500lb HellWig / 265x65x17 Wrangler AT
    K&N Filter / AirRaid MIT / MagnaFlow 2.25" Dual Exhaust / HyperTech MaxEnergy

  3. #3
    Legend
    murdog94's Avatar
    Join Date
    Feb 2008
    Location
    Cloquet, Minnesota, United States
    Posts
    8,198
    Blog Entries
    12

    Default

    Other than the increase in engine RPMS will will speed up the wear on the motor, and the mentioned fuel milage no.
    A little more detail about engine size etc would be nice.
    Mike

    Currently

    1997 Chevy S-10 Blazer 4X4 with 330K miles and counting (Hunting rig).

    2009 Saturn Aura XE (wifes car)

    2011 F-150 Crew 4X4

    "Hold it to the floor till you see God.... Then Brake!!!!"

  4. #4
    Jr. Mechanic GrizzlyTN's Avatar
    Join Date
    Jun 2010
    Location
    Jackson Tennessee
    Posts
    130

    Default

    Running a WT 4.3 V6, It's definitely made a difference since I put the 33's on.

    I did read a bulletin that there is some sort of software update at the dealership for the transmission that fixes the weird shifting, mostly it's not shifting down when it needs to. I know it's a V6 but the power is there, the transmission just doesn't shift down when it should, like passing or getting on the interstate, if you push the pedal down all the way, FINALLY it will shift down and go just fine. That's in 3rd or 4th, both act the same that way, but 3rd at least locks out the OD from shifting down the torque.
    2012 Chevy Silverado Z71 4x4 5.3
    Rough Country 2.5' Lift/Level
    Chevy 18's on Toyo Open Country MT 33's
    DiabloSport Trinity Tuner with Custom Tune from Lew
    Debating on AMP Research Powersteps

    2008 GMC Sierra WT 4x2 4.3

    3" Rough Country Suspension Lift w/Control Arms
    Super 44 Flowmaster Straight Dual Exhaust from the Cat Back with 18" Chrome 3.5" Exhaust Tips.
    Moto Wheels 951 18" on Nitto Mud Grappler 33's
    Infinity Kappa Perfect 6.1 System with Kenwood 5.1 amp using Stock Headunit.

  5. #5
    Legend
    murdog94's Avatar
    Join Date
    Feb 2008
    Location
    Cloquet, Minnesota, United States
    Posts
    8,198
    Blog Entries
    12

    Default

    Sounds like its time for new gears, that will allow you to use OD and save the milage, since a 3in lift, and 33s is alot for 195HP. So in my opinion that would be my next mod for your truck. But you will also want to find out what gears you have right now.
    Mike

    Currently

    1997 Chevy S-10 Blazer 4X4 with 330K miles and counting (Hunting rig).

    2009 Saturn Aura XE (wifes car)

    2011 F-150 Crew 4X4

    "Hold it to the floor till you see God.... Then Brake!!!!"

  6. #6
    Jr. Mechanic GrizzlyTN's Avatar
    Join Date
    Jun 2010
    Location
    Jackson Tennessee
    Posts
    130

    Default

    So you don't think the software update will do any good? I've never done any tranny mods in my life, is there a sticky on how to figure out the basics?
    2012 Chevy Silverado Z71 4x4 5.3
    Rough Country 2.5' Lift/Level
    Chevy 18's on Toyo Open Country MT 33's
    DiabloSport Trinity Tuner with Custom Tune from Lew
    Debating on AMP Research Powersteps

    2008 GMC Sierra WT 4x2 4.3

    3" Rough Country Suspension Lift w/Control Arms
    Super 44 Flowmaster Straight Dual Exhaust from the Cat Back with 18" Chrome 3.5" Exhaust Tips.
    Moto Wheels 951 18" on Nitto Mud Grappler 33's
    Infinity Kappa Perfect 6.1 System with Kenwood 5.1 amp using Stock Headunit.

  7. #7
    Legend
    murdog94's Avatar
    Join Date
    Feb 2008
    Location
    Cloquet, Minnesota, United States
    Posts
    8,198
    Blog Entries
    12

    Default

    Oh no the tranny mod might work.... there doesnt seem to be anything wrong with the tranny however the gears i was talking about will help to get your milage back, and keep the tranny and motor happy.

    I was talking about Differential Gears. And is your truck a 2X4 or a 4X4???
    Mike

    Currently

    1997 Chevy S-10 Blazer 4X4 with 330K miles and counting (Hunting rig).

    2009 Saturn Aura XE (wifes car)

    2011 F-150 Crew 4X4

    "Hold it to the floor till you see God.... Then Brake!!!!"

  8. #8

    Default

    Software update may adjust some shift points, but the underlying issue is lack of torque on those big tires. I would look at changing the gears and maybe adding an aftermarket trans cooler to make sure you get the best life out of your parts.

    Heres a good walk through you may handy.

    http://www.differentials.com/install.html

    2009 Silverado 1500
    5.3L / 3.73 G80 / 4spd / 4x4 / LWB/ Ext Cab / HD Tow-Haul
    2.25in ReadyLift Level Kit / 3in blocks/ 3500lb HellWig / 265x65x17 Wrangler AT
    K&N Filter / AirRaid MIT / MagnaFlow 2.25" Dual Exhaust / HyperTech MaxEnergy

  9. #9
    Jr. Mechanic GrizzlyTN's Avatar
    Join Date
    Jun 2010
    Location
    Jackson Tennessee
    Posts
    130

    Default

    2x4, figured I would buy what I could afford and dress the dog up ya know
    2012 Chevy Silverado Z71 4x4 5.3
    Rough Country 2.5' Lift/Level
    Chevy 18's on Toyo Open Country MT 33's
    DiabloSport Trinity Tuner with Custom Tune from Lew
    Debating on AMP Research Powersteps

    2008 GMC Sierra WT 4x2 4.3

    3" Rough Country Suspension Lift w/Control Arms
    Super 44 Flowmaster Straight Dual Exhaust from the Cat Back with 18" Chrome 3.5" Exhaust Tips.
    Moto Wheels 951 18" on Nitto Mud Grappler 33's
    Infinity Kappa Perfect 6.1 System with Kenwood 5.1 amp using Stock Headunit.

  10. #10
    Legend
    murdog94's Avatar
    Join Date
    Feb 2008
    Location
    Cloquet, Minnesota, United States
    Posts
    8,198
    Blog Entries
    12

    Default

    I hear ya.. i would go with gears the very next thing. they will run you around $500-$1100 depending on the shop, gears etc.. BUt that will make a HUGE difference in power, milage, and component life.
    Mike

    Currently

    1997 Chevy S-10 Blazer 4X4 with 330K miles and counting (Hunting rig).

    2009 Saturn Aura XE (wifes car)

    2011 F-150 Crew 4X4

    "Hold it to the floor till you see God.... Then Brake!!!!"

Page 1 of 2 12 LastLast

Similar Threads

  1. No 2nd or Overdrive
    By Huntr in forum Chevy Suburban Forum (GMC Yukon XL)
    Replies: 0
    Last Post: 01-06-2011, 08:35 AM
  2. 97 Z71 4x4 jerking in overdrive
    By eatinmustangs in forum GM Powertrain
    Replies: 4
    Last Post: 08-14-2010, 10:46 PM
  3. The stupidity I see everyday
    By Lugnuts in forum Games Forum
    Replies: 5
    Last Post: 01-18-2010, 12:32 AM
  4. 99 Z71 Overdrive/Trans Help
    By Sweedon in forum GM Powertrain
    Replies: 1
    Last Post: 05-18-2009, 10:03 PM
  5. Can it click out of Overdrive?
    By DOTSS in forum GM Powertrain
    Replies: 2
    Last Post: 01-04-2009, 10:27 PM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •