Th400 conversion e-prom changes?

#1
Converted my car to a 400 over the winter. Everything is done and ready to drive. However... first and second gear are a slightly different ratio than the 200 that was in it. And I'm still using an eprom, one of Eric's chips. The pts extreme that was in it had no electronics and I relied solely on mph for chip timing in the gears. Do I need to pull the chip and send it to Eric for a correction due to the new gear ratios? Thanks in advance
 
#2
You are probably ok as is. If you can datalog it, and see exactly where the shifts occur (MPH) at WOT, then we could make it exact, but usually it's not necessary.
 
#3
Thanks for the prompt response. I went and farted around with the car a bit and the gear change and timing change are very very close.