Sonnax 2.84 input gear on 2005 4L60

[Vicstruck]

i am building a 4L60 with the Sonnax 2.84 input gear and on my 2005 ECU i don't see anywhere to change the first gear. i build one on my other truck which is a 2000 S10 and it allowed me to change the first gear ratio. am i missing it or did they do away with it.

[Ben Charles]

You don’t have too, just tune it and will be fine

[Vicstruck]

You don?t have too, just tune it and will be fine

Will it not affect the speedometer or anything in the ECU if first gear ratio is off?

[Alvin]

The gear ratio for individual gears is just to monitor slip. Some times you have to turn off the "trans component slipping" diagnostics if you can't change the gear ratios.

But other than that just tuning the shift points to and from that gear.

[TheMechanic]

Trans>General>Gear Ratios

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[Alvin]

That's missing in a lot of cals.. at least in HPT

[Vicstruck]

Thanks Alvin, thats what i needed. As long as everything will still operator normally it should be fine.