Thread: 2.93 to 3.29 gear change tuning HPtuners

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  1. #1 2.93 to 3.29 gear change tuning HPtuners 
    GTX Level Member OH4CompG's Avatar
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    Ok I know that you have to go into speedo and change the final drive from 3.29 to 3.69 for this and commit that change. My question is do I have to do a full write after this? I did this and did a partial write and my Tim King trans is shifting really hard like its in max adapt and maxing the line pressure. I can hear the pump whining too. This is the same thing that happened last time after I got it from him new. And eventually after a few thousand miles I had to send it back for repairs.
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  2. #2 Re: 2.93 to 3.29 gear change tuning HPtuners 
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    Which reluctor and so on are you using?
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  3. #3 Re: 2.93 to 3.29 gear change tuning HPtuners 
    GTX Level Member OH4CompG's Avatar
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    Not sure. Tim knew what the car was and I told him what I wanted to do with the gear change.
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  4. #4 Re: 2.93 to 3.29 gear change tuning HPtuners 
    GTX Level Member OH4CompG's Avatar
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    Just need to know that I changed the tune properly before I ask Tim for further advice or I just swap some 2.93 chains in there and be done with it
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  5. #5  
    I live here. MoarkatsINmuhtrailer's Avatar
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    You have a compg?? They have 3.29s stock?
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  6. #6 Re: 2.93 to 3.29 gear change tuning HPtuners 
    GTX Level Member OH4CompG's Avatar
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    This trans is in my 98 regal GS. Had 2.93 stock
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  7. #7  
    I live here. MoarkatsINmuhtrailer's Avatar
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    Ohh didn't know that haha carry on
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  8. #8 Re: 2.93 to 3.29 gear change tuning HPtuners 
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    need to know which reluctor wheel is in there to know what to set the pulses per mile to.
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  9. #9 Re: 2.93 to 3.29 gear change tuning HPtuners 
    GTX Level Member OH4CompG's Avatar
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    You don't change pulses per mile that I know of Matt. At least that's what the guys on HPtuners forums say
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  10. #10 Re: 2.93 to 3.29 gear change tuning HPtuners 
    GTX Level Member OH4CompG's Avatar
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    Found my answer! Need to do a full write on the tune after changing to 3.69 in the speedo section to reset all the trans adapts!
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  11. #11 Re: 2.93 to 3.29 gear change tuning HPtuners 
    Turbo is the way to go. BillBoost37's Avatar
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    In case anyone needs it.

    Quote Originally Posted by BillBoost37
    I had contacted Dave at TripleEdgePerformance on one of the other forums for his assistance in gear ratio changing. When Intense rebuilt my trans they recommended a different tooth count reluctor wheel (VSS) and a speedo recalibrator. Unfortunately as you tune etc the pcm is seeing the incorrect speed. This always bothered me and I noticed a few people doing it w/o the spoofs.

    The below quotes are great info for anyone considering a gear change that has an HPT or can have the programming done.

    Dave, I've heard alot about you and talked with many guys. Quick one for you hopefully. Car is a 97 Bonneville, may as well be a 99, I swapped the harness and pcm last week. Do you have the parameters for 3.29 gears with HPT? I have a couple different ones and am looking for the definitive sure thing. Trans was updated by Intense when done the first time around. Basically went with one of everything.

    thanks
    Bill
    Hi Bill, since you have HPT I am going to give the easiest sure-fire way that I use for 3.29s in place of 2.93s. First off make sure you have 100% STOCK 2.93 tables and numbers for everything trans related. Once that is verified go into the Speedo folder in the editor. You will see a handful of numbers but there is only ONE that you need to change and it works perfect every time. On the top of this menu there is "Tire size" and "Gear Ratio" You will need to re-enter the existing tire size but instead of 3.29 ratio that it has stock replace it with "3.69" . Leave the "Auto calculate" feature turned ON. click commit change and that is it! Its that simple. Many people calculate numbers are import numbers from 3.29 geared cars and it rarely works, dont ask why it just doesnt. You will know the method I gave you works because you will not recieve an incorrect gear ratio code and also in the scanner pull up Current Gear Ratio in the PID list. In 3rd gear it should read 1:1 and must be within a few hundredths or it will throw the code. So just change 3.29 to 3.69 and you are set. And just so you arent confused about why it already says 3.29 from the factory that is because the differential ratio is a 3.29. There is also a parameter for sprocket ratio and it will be 1.121 which after some math gives you the 2.93 overall ratio. Changing this to 1.00 does NOT fix the problem, just leave it as is and it will work fine. I hope this helps you out
    I drink..so consider that when reading my posts.

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  12. #12 Re: 2.93 to 3.29 gear change tuning HPtuners 
    GTX Level Member OH4CompG's Avatar
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    Good info Bill. I already read that because it was posted up verbatim on the idahoclub3800 site. Just note, do a full PCM write after you change that gear ratio.
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  13. #13 Re: 2.93 to 3.29 gear change tuning HPtuners 
    Turbo is the way to go. BillBoost37's Avatar
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    Yeah..likely Jared posted it up. Being a PDX'r you'd know Jared, Thomas and the whole crew.
    I drink..so consider that when reading my posts.

    2010 Audi A6 Dual IC's
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  14. #14 Re: 2.93 to 3.29 gear change tuning HPtuners 
    GTX Level Member OH4CompG's Avatar
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    Yessir! It was Jared's doing. We miss Thomas. And we hate him for his year round racing ability in Arizona....
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  15. #15 Re: 2.93 to 3.29 gear change tuning HPtuners 
    Turbo is the way to go. BillBoost37's Avatar
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    I don't hate for his 120F racing..lol
    I drink..so consider that when reading my posts.

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  16. #16 Re: 2.93 to 3.29 gear change tuning HPtuners 
    GTX Level Member OH4CompG's Avatar
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    LOL, yes that is true of that state during most months.
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  17. #17 Re: 2.93 to 3.29 gear change tuning HPtuners 
    GT Level Member mikedinthecity's Avatar
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    had similar problem in my 2000 daytona going from 293 to 329. i did put the heavy duty diff and learned the tune had to be at 369 gear ratio for the speed sensor. after doing this the code for incorrect gear ratio was gone and all is well. if the diff is the light duty then i would imagine u just flash 329 gear ratio and it should work
    2000 Daytona 500 GTP. fender well intake K&N, 180 tstat, flipped dog bones, strut2strut brace, sd headers coated n wrapped, 3in dp, 3.25 pulley, pcm tune, led tails, angel eye halos w 100 watt h1s, p&p heads, p&p m90, yella terra alum roller rockers, head studs, 8mm wires, al104s, 2007 l26, 329s hd diff, alum sub frame
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  18. #18 Re: 2.93 to 3.29 gear change tuning HPtuners 
    Turbo is the way to go. BillBoost37's Avatar
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    Gear ratio of 3.29 = gear ratio of 3.29 whether it's HD or not. However you won't ever go from 2.93 to 3.29 with a non-hd diff on purprose.
    I drink..so consider that when reading my posts.

    2010 Audi A6 Dual IC's
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  19. #19 Re: 2.93 to 3.29 gear change tuning HPtuners 
    SE Level Member charlieRobinson's Avatar
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    What if you went to 3.69 gearing? then what value would you change to in HPT?
    1999 Buick Riviera - L67
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  20. #20 Re: 2.93 to 3.29 gear change tuning HPtuners 
    GTP Level Member Impala131's Avatar
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    Sorry to revive this, but what would the input value be if you were changing from 2.93 to 3.05 gears? (Top swap with S/C bin purposes)
    2003 Grand Prix GTP.... the journey begins again....
    E85 Self Tune with HPT, 80# Injectors, Gen V 3.4 pulley, SD Headers, AL605 Plugs
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