I can't even remember how many months its been since my HP tuner started collecting dust. Well after getting my Regal's CV joint replaced and with it getting warm out again I decided it was time to pull the tuner out. If any of you guys remember I was having a problem trying to get my replacement PCM that was tuned with a HP tuner to work with my transmission. The SAME settings that were working fine in my DHP tuned pcm would not work for some reason in another PCM. I couldn't tune my DHP tuned PCM because it was locked out from my HP being able to license it.
Below I have pictures of what I had to change from my DHP tuned PCM to the replacement PCM for it to work. If I used the same settings that were in the DHP pcm the transmission would shift extremely hard and give me an "incorrect gear ratio" code.
These are the trans settings that I was using in my DHP tuned PCM which worked perfectly:
For the replacement PCM to work this is what I had to change:
As you can see I had to change the Gear ratio from 3.29 to 3.69 for it to work with my HP tuned PCM. I also had to change the sprocket ratio back from 1.000 to the stock 1.121. For some reason the HP tuner sees this information differently. Normally you take the gear ratio (3.29) X sprocket ratio (1.000) and that = 3.29. However for an HP tuner I was told that it sees the gear ratio 3.69/1.121= 3.29 gear ratio. Odd isn't it? So if anyone has a gear ratio problem with there HP tuner then this is what you have to do.
Notes: I have a Dynotech transmission with the 3.29 gear ratio and stock 225/60/R16 tires. You may need to make changes to your tire size depending on what tire you have.