8hp70 replacement

[DocHemi]

I am in need of an 8HP70 for my 2014 5.7, When looking for used ones i keep getting asked about the gear ratio. Why is this? Wouldn't an 8HP70 out of a 2014 1500 with a different gear ratio work? Mine has the 3:21 ratio, but found a good low miles one from a truck with a 3:92 ratio. I can't see why it won't work.....thoughts please.

 

[Drewster]

Indicated speed might be off - sounds like something you could reprogram though