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Gearing

Discussion in '1st Gen. Tacomas (1995-2004)' started by jkr2371, Jan 3, 2008.

  1. Jan 3, 2008 at 2:28 PM
    #1
    jkr2371

    jkr2371 [OP] Teach me more

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    Superlift spacer lift with block in rear
    I would like to change my gearing in my 02 Tacoma and my stock gears are 4:10 and I have put 33"s on my truck what would be a good gear to get back my mileage
     
  2. Jan 3, 2008 at 2:50 PM
    #2
    Janster

    Janster Old & Forgetful

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    What engine and transmission do you have?
     
  3. Jan 3, 2008 at 2:55 PM
    #3
    jkr2371

    jkr2371 [OP] Teach me more

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    Superlift spacer lift with block in rear
    i have a v6 3.4 and 4.10 gears
     
  4. Jan 3, 2008 at 3:14 PM
    #4
    Janster

    Janster Old & Forgetful

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    Auto or manual transmission?
     
  5. Jan 3, 2008 at 4:49 PM
    #5
    jkr2371

    jkr2371 [OP] Teach me more

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    Superlift spacer lift with block in rear
    auto tranny and i also have 4:10 gears
     
  6. Jan 3, 2008 at 5:19 PM
    #6
    concrete jedi

    concrete jedi Well-Known Member

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    Broken and scratched tailgate, cracked rear tail light lens, coffee stain in driver seat.
    I don't know if it can be done, saying this in a world that most anything can be done... but probably 3.73 would be a good start.
     
  7. Jan 3, 2008 at 6:35 PM
    #7
    tacotoe

    tacotoe Pastry Chef

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    I must disagree with the concretejedi(master) on this one. I think when going to bigger tires you need a numerically higher ratio like 4.56 this would make the engine run closer to its original rpms (if it was OE size tires before w/4.10s).Would that get the mpg back..? doubtfull, performance/pep most likely.One thing to remember too is that unless you have your speedo/odometer recalibrated you will be traveling faster and puttinng more miles than what its showing.
    P.S.No, I wasn`t consulting my magic 8 ball for this reply
     
  8. Jan 3, 2008 at 6:55 PM
    #8
    350TacoZilla

    350TacoZilla Well-Known Member

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    yeah 4.56 is a good ratio but little higher rpms on freeway here is a good comparison

    http://www.superlift.com/images/misc/gear-chart.gif
    I believe these are all with 1:1 gear in tranny and 65mph.. obviously over drive is slighty more like .86:1 but this is a good numbers comparison chart

    stock rpms in 4th with 4.10 and 31's was 2896rpm

    rpms in 4th with 4.56 and 33's is 3018rpm

    or you could switch to factory 4.30's with 33's be 2826rpm

    not a bad jump and probably keep near same mpg
     
  9. Jan 4, 2008 at 4:47 AM
    #9
    jkr2371

    jkr2371 [OP] Teach me more

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    Superlift spacer lift with block in rear
    I think that i will go with the 4:56 gears I guess i will be running a little higher rpm but i cant get any other gear from 4wpw in between the 4:10 and the 4:56. The Superlift chart helped me pretty good and I also found another chart the had an equation on it and it said I should use 4:45? but i guess it it close enough to 4:56 to me. At least I will have a little more pickup for towing and mudding and hopefull my mpg wont be the same because i only get 14 mpg right now and that sucks. THANK TO EVERYONE THAT RESPONDED YOU HAVE ALL BEEN HELPFUL. TALK TO YOU ALL SOON.
     
  10. Jan 4, 2008 at 5:36 PM
    #10
    350TacoZilla

    350TacoZilla Well-Known Member

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    if ya get the 4.56's let me know if ya wanna sell the 4.10's
     
  11. Jan 4, 2008 at 7:33 PM
    #11
    Janster

    Janster Old & Forgetful

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    Wrong direction in gearing - you want higher numbers like 4.56.

    3.73's would be far worse than his stock gears - causing less rpm's and less power (so to speak).
     
  12. Jan 4, 2008 at 7:41 PM
    #12
    tacotoe

    tacotoe Pastry Chef

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    An friends `69 Chevelle SS had 4.11s and you could almost see the gas gauge moving at 75 mph in that case a 3.73 would have helped mpg. by lowering the RPMs, totally different senario but just an example
     
  13. Jan 5, 2008 at 5:53 AM
    #13
    concrete jedi

    concrete jedi Well-Known Member

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    Broken and scratched tailgate, cracked rear tail light lens, coffee stain in driver seat.
    Thank you TacoToe, that's where I was going earlier in the thread. :pccoffee:
     
  14. Jan 5, 2008 at 7:12 AM
    #14
    tacotoe

    tacotoe Pastry Chef

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    I thought that might have been the case.
     
  15. Jan 5, 2008 at 4:05 PM
    #15
    350TacoZilla

    350TacoZilla Well-Known Member

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    yeah but to get power back and get better mpg "lower / deeper" or numerically higher gears as they are called.... is actually the way to go on this one... see if you have too low of gears the engine doesnt run in the sweet spot rpm and actually gets worse mpg... since throttle isnt open much the truck would get enough air etc etc. lol... i have a 69 Chevelle SS396 too LOL had 396 in it...now has 427 vette block with tons o goodies... had 4.88 gears with muncie M-21 4spd now 4.11 with TH-400 (nitrous use) going to muncie M-20 4spd and 3.73's////right now i get around 3 mpg...and with an 20 gallon tank........60 miles friends and neighbors (most my neighbors hate me, something about open headers when tuning the motor i dunno)
     
  16. Jan 7, 2008 at 4:51 AM
    #16
    jkr2371

    jkr2371 [OP] Teach me more

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    Superlift spacer lift with block in rear
    when i get my new gears put in and see how they do i will sure tell you first when i am going to get rid of my old gears Thanks for the help 350tacozilla
     
  17. Jan 7, 2008 at 3:04 PM
    #17
    350TacoZilla

    350TacoZilla Well-Known Member

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    np just think I'm running 35's with 3.58's and a 4cyl right now lol was going to order the gears...but just keep sinking money in the v8 truck
     
  18. Jan 8, 2008 at 9:26 AM
    #18
    cmfranks

    cmfranks Well-Known Member

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    jkr,

    please let me know asap when you find out the results. i am in the same boat as you are. 6 in lift w/ 33's on an 08 taco double cab. Avg 15 mpg !!

    does anybody know if the URD MAF calibrator will actually help??

    also what about the ECO system listed on other threads???

    Help, i'm going broke w/ gas prices
     
  19. Jan 8, 2008 at 2:17 PM
    #19
    350TacoZilla

    350TacoZilla Well-Known Member

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    little lower gears will help but like anything you can go to far... not sure what would be good on 2nd gens but 4.56 is good for 33-35" tires on taco's or with 35's you can go 4.88 if your not on highway alot
     
  20. Jan 9, 2008 at 4:35 AM
    #20
    cmfranks

    cmfranks Well-Known Member

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    Thanks,

    Does anybody really know what size gears are on the 4.0 Liter 2008 TRD Prerunner Double Cabs?? 4 wheel auto parts called somebody(?) and gave them my year and model and was told i had 4:10's or 11's (?) but after ALOT of research on gear ratio's i have read that these models have 3:73's. (internet stated that 2.7 Liter Prerunners had the 4:10's)

    Also, i have seen about 4 different charts for tire size to gear ratio and they all seem diffrent. I definately want better MPG, and don't want to sacrifice lose of city or hwy power. What is the ideal RPM's for avg city speeds as well as Hwy speeds??

    As stated in my previous, i am running 305's on 17 in rims.

    Thanks ahead of time. I know somebody has the answers i'm looking for.
     
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