anyone driven with changed gears?

[YellowMenace]

I'm getting a PI stallion converter, the "jerry" mods to the auto tranny, alum. driveshaft, throttle body, axles, and 4.10 gears in my 03 Mach 1 this week. I have my deposit down for the Beaumont SCT dyno tune.
Has anyone driven on gears without a tune?
Will I be OK driving from Houston to Beaumont for the tune?

I know know my low speed shifts will be early and my speedo will probably be off significantly

[InDShadow]

changing your vehicles gears does not require a tune. the only time you would need a dyno tune is if you have done a substantial amount of work..ie: addition of nitrous or SC. any other motor modification that will change the A/F ratio. Getting a dyno tune now with little or no engine mods will only enhance the performance of a basically stock motor very little. for the cost of the dyno tune and only getting a handful of HP which will not be noticed I feel it will be a waste of money. I would use this money for a H-pipe, underdrive pullies, MAF, LCA's...etc

with you having the automatic they will have to correct the speedo with a chip because of the gears. The chip will help with shift points and shift firmness along with the speed correction as I stated.

so the answer to your question about harming the motor traveling from beaumont to houston. No you will not do anything but add on bogus miles if the speedo isn't corrected.

[funk]

I've driven my car since last March on 4.10s and still have not change the speedos. Took it to Neworleans and Austin with no problems.

[YellowMenace]

I guess I'll have to be more specific.....I don't think you guys without tunes are driving automatics. I thought the torque converter and shift point statement would be a big enough clue. I may not necessarily need a dyno tune, but I definitely will have to have a chip/reflash with the gear ratio or the tranny will have a bad time. The speedo correction is secondary. I too have driven my 94 V6 for some time with speedo error, but pre 99 cars didn't have a separate Vehicle Speed Sensor for the tranny program.

The problem will arise when the computer can't reconcile the VSS, the speedo sensor, and the tach.

Could I hear from the automatic crowd now? Preferably those that know the answer from experience.