View Full Version : help in understanding lt1 ecm to ls1 ecm transmission calibration

05-29-2022, 07:54 PM
so i have a issue i hope someone can help me with i just swapped my 95z28 camaro ecm to a 411 ecm i had the torguehead 24x installed and they sent me the 411 pcm with a stock tune but i have swapped rear end and different size tires so this is what i used on tuner pro to calibrate my ecm when it was a 95 camaro ecm 17916 this is using a xdf for a 12212156 os 17917 its the only thing i could find that looks like something to do with the speedo .
now i have the compare up for both xdf's the 95 and the 12212156 ecm my question is can i use either xdf and just switch the numbers so i can calibrate my transmission speedo or am i completly wrong
so the top numbers are the 1221216 ecm numbers and the copy numbers are my 95 speedo calibrations

dave w
05-29-2022, 09:28 PM
One possible option for the '0411 is BlueCats Transmission Table Software: https://forum.hptuners.com/showthread.php?44953-Bluecat-Transmission-Table-Software

dave w


05-31-2022, 05:27 AM
i guess what im asking is if these are the scalers for adjusting the speedo

dave w
05-31-2022, 06:16 AM
BlueCats uses the vehicle gear ratio and tire size to calculate the speedometer parameters and shift parameters for the '0411 pcm.

The screenshots below show some of the scalers in your list. I'm suggesting BlueCats because most, if not all the scalars you requesting are provided by BlueCats. The screenshots show some scalers for 3.23 gears and a tire diameter of 24.91 inches. BlueCats is plug-n-play for HP Tuners. BlueCats has the scaler information needed for TunerPro, just need to deep dive for it.

dave w



dave w
05-31-2022, 06:34 AM
BlueCats attached.

dave w

06-03-2022, 05:43 AM
H0105 should be the output for the speedometer. 4000 pulses per mile. If you mean to calibrate then I think H0101 to H0104 are used. The outputs are for PCM outputs to other components (TCS, cruise, speedo).

06-03-2022, 04:55 PM
thank you that is what i was thinking but i wasnt completly sure