1. Welcome to Tacoma World!

    You are currently viewing as a guest! To get full-access, you need to register for a FREE account.

    As a registered member, you’ll be able to:
    • Participate in all Tacoma discussion topics
    • Communicate privately with other Tacoma owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site

Funny RPM thing

Discussion in '2nd Gen. Tacomas' started by Runamuk, Mar 16, 2009.

  1. Runamuk

    Runamuk [OP] Member

    Joined:
    Mar 1, 2009
    Member:
    #14197
    Messages:
    14
    Gender:
    Male
    San Diego
    Vehicle:
    09 TRD OFR V6 6Spd
    Hello everyone,

    I have this strange little thing going on when changing gears on my 09 AC 4x4 6sp. When shifting between gears the RPM's hang, meaning when I lift my foot off the gas, the RPM's don't drop. It's like their waiting for me to complete the gear change and step back on the gas. I spoke with my dealer and test drove another 6sp and it did the same thing, so I'm guessing it's normal? By the way....I hate it! Anyone know what the deal is with this? Not sure why I didn't notice it before but I only have 640miles on the truck so I'm still getting to know her.

    Tks
     
  2. jhodge83

    jhodge83 Any dog under 50# is a cat and cats are useless... Staff Member

    Joined:
    Apr 27, 2007
    Member:
    #1432
    Messages:
    26,860
    Gender:
    Male
    First Name:
    Jamie
    Moncks Corner, SC
    Vehicle:
    09 Timberland Mica DC 4WD Sport
    wat?
    i dont have a manual, but sounds almost like a rev match of some sort
     
  3. chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

    Joined:
    May 8, 2008
    Member:
    #6497
    Messages:
    103,501
    Gender:
    Male
    First Name:
    FlimFlubberJAM
    Tenoe, AZ
    Vehicle:
    2013 Rubicon Unlimited,
    4.10 gears, sliders, lots of buttons, and yellow flashing lights on the dash.
    Yup....its normal..Another reason I chose the Auto. :)
     
  4. RelentlessTaco

    RelentlessTaco Custom Tacoma bumpers & more for your offroad toy Vendor

    Joined:
    Feb 17, 2008
    Member:
    #4772
    Messages:
    13,335
    Gender:
    Male
    First Name:
    Eric
    Eastern side of the Sierras, NV
    Vehicle:
    07 SR5 4x4> 03 SR5 4x4 total> 14 Crewmax TRD
    Had tons on the Taco's.... new truck is pretty stock
    Mine does it, as do all the 6speeds. I've read from other people that it has to do with emissions in some way, but I'm not entirely sure the reason it does it. I've got 25000 on my truck now and it is just second nature and not a big deal to me any more now that I've driven with it for some time. You'll get used to it.
     
  5. aaronk

    aaronk Well-Known Member

    Joined:
    Mar 9, 2008
    Member:
    #5180
    Messages:
    199
    Gender:
    Male
    Vehicle:
    2009 Dbl Cab V6 TRD
    As others have said, it's normal... Seems to be worse when you shift at certain RPM's. Nothing you can do but adjust to it. Toyota failed big time on the 6spd....
     
  6. Pootz

    Pootz Active Member

    Joined:
    Apr 12, 2008
    Member:
    #5935
    Messages:
    25
    Gender:
    Male
    Calgary, AB
    Vehicle:
    2008 Access Cab V6 4X4
    You're not shifting fast enough if you notice it. Just kidding. I must admit this is one thing that sort of bothers me as well on my six speed. The revs don't drop until you nearly return to a stop during deceleration.
     
  7. Janster

    Janster Old & Forgetful

    Joined:
    Mar 25, 2007
    Member:
    #1138
    Messages:
    13,557
    Gender:
    Female
    First Name:
    Jandy
    Lancaster, PA
    Vehicle:
    2007 4.0L 4x4 TRD Sport Access Cab A
    Advantage Torza top (tri-fold), Husky floor mats, RuffTuff seat covers, C2C hood struts, Homelink mirror, USA Spec PA15-Toy (120gig Classic & 8gig nano), Garmin Nuvi 660, Protecta Bed mat, Pop-n-lock, TSB Springs, Scangauge II, Heated drivers seat, Fumoto drain valve, Aries pushbar, PIAA 540 fog lights, Hood scoop grahics, Flowmaster 50 series dual catback exhaust, RainX Latitude windshield wipers, Husky rear floor liner (ontop of folded down seats). Console Vault.
    Same here....
     
  8. chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

    Joined:
    May 8, 2008
    Member:
    #6497
    Messages:
    103,501
    Gender:
    Male
    First Name:
    FlimFlubberJAM
    Tenoe, AZ
    Vehicle:
    2013 Rubicon Unlimited,
    4.10 gears, sliders, lots of buttons, and yellow flashing lights on the dash.
    :proposetoast:


    Are you all better, now??
     
  9. Runamuk

    Runamuk [OP] Member

    Joined:
    Mar 1, 2009
    Member:
    #14197
    Messages:
    14
    Gender:
    Male
    San Diego
    Vehicle:
    09 TRD OFR V6 6Spd
    Well like I mentioned in the orig post...I do hate it....but not near enough to drive an auto.
    Did a bit of research because I remembered reading about this issue before. It is also a factory setting in the 05+ Mustang's (I used to have a 08, it was in a different fourm) Reason I didn't notice it in that car is due to I bought a performance tune before taking receipt of the car that does away with this symptom. Now all I need to do is find a tuner for the Tacoma. Anyone know any?
     
  10. Snipe

    Snipe Well-Known Member

    Joined:
    Jan 9, 2009
    Member:
    #12421
    Messages:
    1,155
    Gender:
    Male
    Pacific NW
    Vehicle:
    08 TRD Off Road
    Mine has that RPM lag that drives me nuts, when you lift your foot off the gas it takes anywhere from 2 to 4 seconds before engine braking takes place because the RPM only drops a couple hundred and then just hangs there, it also has some sort of high idle set that is right about 1200 RPM, if you are coasting down a hill and kick it out of gear the tach will never drop below 1200 until the truck almost comes to a complete stop
    When these two things happen together it pisses me off and makes me wonder WTF were they thinking.

    Lets say you are coming down a logging road coasting along under compression in 3rd gear, as the grade flattens out and the truck begins to slow, when it gets down to that magical 1200 mark it is like the truck goes into freewheel for that also magical 2 to 4 second lag time and then again begin to slow down.

    If I had to do it over I'd have bought the auto since the manual in my opinion is a complete waste of aluminum that would have been more productive making 1307 beer cans.

    I loved all the previous Toyota manual boxes I have owned but they really missed the mark on this one :(
     
  11. DanGer

    DanGer Avatar approved by 98tacomav6

    Joined:
    Jun 7, 2008
    Member:
    #7155
    Messages:
    5,514
    Gender:
    Male
    Northern Virginia & Blacksburg
    Vehicle:
    07 Base 4Cyl 4x4 Manual
    White Head Light mod, White shorty antennae, Doug Thorley Long Tube headers, AFE Drop in air filter, Secondary Air Filter Removed,
    I think it was something to do with burning the gas left in the engine instead of just dumping out the exhaust. Emissions
     
  12. chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

    Joined:
    May 8, 2008
    Member:
    #6497
    Messages:
    103,501
    Gender:
    Male
    First Name:
    FlimFlubberJAM
    Tenoe, AZ
    Vehicle:
    2013 Rubicon Unlimited,
    4.10 gears, sliders, lots of buttons, and yellow flashing lights on the dash.
    Not sure that could be the reason. Anytime you let off the throttle, and in gear, the ECU cuts the fuel to the injectors until around 1200 rpm. Then, it only gives fuel needed to keep the engine at idle. Once the injectors are "turned off", there is no longer any fuel in the engine to burn, as the last ignition stroke burns any fuel left in the cyl.
     
  13. Janster

    Janster Old & Forgetful

    Joined:
    Mar 25, 2007
    Member:
    #1138
    Messages:
    13,557
    Gender:
    Female
    First Name:
    Jandy
    Lancaster, PA
    Vehicle:
    2007 4.0L 4x4 TRD Sport Access Cab A
    Advantage Torza top (tri-fold), Husky floor mats, RuffTuff seat covers, C2C hood struts, Homelink mirror, USA Spec PA15-Toy (120gig Classic & 8gig nano), Garmin Nuvi 660, Protecta Bed mat, Pop-n-lock, TSB Springs, Scangauge II, Heated drivers seat, Fumoto drain valve, Aries pushbar, PIAA 540 fog lights, Hood scoop grahics, Flowmaster 50 series dual catback exhaust, RainX Latitude windshield wipers, Husky rear floor liner (ontop of folded down seats). Console Vault.
    Yup! Thanks for askin'!
    :proposetoast:
     
  14. gonzo6up

    gonzo6up Well-Known Member

    Joined:
    Jan 5, 2009
    Member:
    #12240
    Messages:
    432
    Gender:
    Male
    Middle Tn
    Vehicle:
    09 tacoma SR5 4x4 sport
    tint/ vent visors/ seatbelt chime mod/ DTRL Mod
    My 09 6spd does the same thing and i didn't like it at first but once i figured out the rpm range that it shifted smoothest at i love it now. It seems to me that if i tach each gear to about 2800rpm then it never drops below 2000rpm on my next gear so it helps with smooth acceleration IMO. It did take a few hundred miles of driving before i was comfortable with it though.
     
  15. chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

    Joined:
    May 8, 2008
    Member:
    #6497
    Messages:
    103,501
    Gender:
    Male
    First Name:
    FlimFlubberJAM
    Tenoe, AZ
    Vehicle:
    2013 Rubicon Unlimited,
    4.10 gears, sliders, lots of buttons, and yellow flashing lights on the dash.
    Good to hear! :)
     
  16. Mazdayota

    Mazdayota Well-Known Member

    Joined:
    Mar 15, 2009
    Member:
    #14755
    Messages:
    54
    Gender:
    Male
    Mason, OH
    Vehicle:
    '09 SR5 4X4
    K&N Drop-in air filter
    I've noticed the lag and it doesn't bother me too much yet. In my experience all cars have some sort of lag. My Protege takes about .5 sec or so to lift throttle completely but that's because I've also tightened up the throttle cable a bit. These trucks have a digital throttle right? Perhaps that has something to do with it?

    I wonder what the flywheel weight is in this truck. I know it has little to do with engine braking but a lighter flywheel would definitely have the engine speed dropping more quickly.
     
  17. gearhead69

    gearhead69 Member

    Joined:
    May 6, 2009
    Member:
    #16883
    Messages:
    20
    Gender:
    Male
    Vehicle:
    05 Tacoma Pre
    It is an electronic emission thing. If it decelerated quickly the fuel would not shut off as quickly and a small amount of unburned fuel is wasted. Let your foot off the gas then push in the clutch and shift, it will fix your prob completely. I am pissed off with mine cause the throw out bearing is bad at 50k, and my mileage sucks 16mpg. I am going to have my flywheel lightened. LUK
     
  18. Lentsnh

    Lentsnh Well-Known Member

    Joined:
    Nov 22, 2008
    Member:
    #10953
    Messages:
    10,069
    Gender:
    Male
    Vehicle:
    2007 Hummer H3 Tactical Edition
    None yet- Future: HIDs, Tinted tails, LED interior lights,
    its rev match.. When you change gear its a constant rev instead of changing gear and then getting a jolt
     
  19. chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

    Joined:
    May 8, 2008
    Member:
    #6497
    Messages:
    103,501
    Gender:
    Male
    First Name:
    FlimFlubberJAM
    Tenoe, AZ
    Vehicle:
    2013 Rubicon Unlimited,
    4.10 gears, sliders, lots of buttons, and yellow flashing lights on the dash.
    Gearhead has it correct.
     
  20. rngrchad

    rngrchad Yankee Oscar Tango Alpha

    Joined:
    Oct 12, 2008
    Member:
    #9919
    Messages:
    180
    Gender:
    Male
    The former USA now USSA (United States Socialst Am
    Vehicle:
    08 Rugged Trail TRD
    Rockwell 30 ton axles.
    Hey don't feel bad. My auto is seeing about 16 to 18 mpg max. It's a tough son of a gun though. I sure am GLAD to have the auto after reading this post. Suckers LOL.

    One more question:

    Can't you guys with the 6 spd manuals learn to shift those things without the clutch? Just kinda match the rpm's to the gears and "feel" it into gear without and clutch pedal? Would this help illiviate any of your problems? I don't use the clutch ever except to start off from a start and rarely to downshift from time to time.
     
To Top