just bought a 97 lt1 and the prev owner put 3:73 gears in the rear. i was wondering if anyone knew how to fix the speedo or if i need to buy the hyper tech programer?

 

i believe they sell new speedo gears for diffrent wheel sizes... iono if those could be applied here

 

Do you know what type of transmission you have and if it's an electrical sender or mechanical?

 

The 97s use a 4L60e auto transmission, or a 6 speed manual. Both use a VSS (vehicle Speed Sensor), where the speedo gears used to live. The VSS provides the speed signal to the PCM.The PCM drives the speedometer and has to be reprogrammed in order to correct the speedometer reading. A tuner can do it, or you could use a hand held programmer. Either way it is going to cost.

 

that blows, only paid a grand for the car so i can't complain about the little things that need to be done. thanx for the info

 

are there any other power tuners out besides hypertech?