I hope you got the TFOD-HD2 kit for your 42RH, not the TF2. Different trans, different kit. When the OD Chrysler transmissions first appeared, I contacted Transgo and asked if the TF1/2 would work. Their words of wisdom, yes it'll fit, but no it wouldn't work the way they wanted it to in the OD transmissions. It may have been a marketing ploy (the TFOD-HD-2 kit wasn't available yet), but until the OD kit was on the shelf, we had no kits available for the A500/A518 series.