Do I need my speedo calibrated

[One_Bad_TA]

Well Ive got a Moser 9" in my car and Im switching gear ratios from 3.42 to 4.56 so will I need to recalibrate my speedo? If so where can I have this done and around what price? I heard the computer might have to be flashed but Im not sure.

[Y2KPewterSS]

Yes, your speedo will need to be recalibrated. Prices will vary

[JwMonE99]

I think he wants to know the different options of how to get it calibrated.

[JwMonE99]

Only ways I know of is when you tune it with either a mail order tune, or get one of those hand helds.
O hear you can take it to a GM dealer and have them do it but I am not sure.

[One_Bad_TA]

Ok thats what I was lookin for, just wanted to make sure I wouldnt have to do anything big with the PCM. Thanks guys

[ls1camino]

Damn...4.56 gearing...track only?

[JwMonE99]

anyone know if dealership can recalibrate?

[Y2KPewterSS]

anyone know if dealership can recalibrate?

Probably can, but they would charge you way more than its worth.

[One_Bad_TA]

Damn...4.56 gearing...track only?

Nope mostly a DD but I gave him my tire size and transmission ratios and we worked out different times for quarter mile and highway cruising and he suggested these. If I dont like them he will change them out for me. So I should be ok