02-06-2019, 07:41 AM
I am repowering my 79 from 555 to 6V92. I cannot find tag on drive axle. I know I need to change ratio but don't know what axle I should be searching for. Anyone know what axle it is. I think someone said Rockwell SQRD but need to calculate ideal ratio for Allison 4 speed 747hd. Thanks for any information you might have.