Ah, I'll have to go back and reread. For some reason I thought you had found an Eaton 7 spd. With a synchro tranny you won't have any issues. The one in the service truck I'm pretty sure has no syncros in any gears, so It's like trying to downshift into granny low in an old pickup 4 spd while moving. Now that I've replaced the clutch system and flywheel in my Ram I love my 6 speed, especially when towing in the mountains. I know you have a different make and model, but if the ratios are similar you're going to love it, can't wait to see it all come together.