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Thread: 4T65E Gear ratio question

  1. #1
    Tuner in Training
    Join Date
    Oct 2014
    Posts
    16

    4T65E Gear ratio question

    OK I have a quick and simple question.

    My tune has stock 2.93 for a GTP and I have now changed the tranny from a GT and now has 3.29 for the gear ratios. I changed over the diff to the HD one.

    I have read many different posts on here and some of it is clear then I read another one and it gets a little confusing but by the looks of it, it depends which version of the software editor I am running. Some posts say change to 3.69 from 3.29 but why??

    So going from 2.93 to 3.29 what do I have to change in the tables. I have just bought the HP Tuner this week and dont have time to mess around for another week to get it to work.

    I also have a shift kit so will have to pull back the shifts in the tune, this I can play with at a later date. I just need it running good with no codes for a week or two.

    Thanks

  2. #2
    Tuner in Training
    Join Date
    Oct 2014
    Posts
    16
    Changed the gear ratio from 3.29 to 3.69 and done the trick.