I have an 01' 3500 dually it has a Dana 80 with 3.55 ratio rear end. with abs. disk brakes... The truck was in a wreck by previous owner.. The right axle tube is slipped out 3/4 to a inch out.and fluid ran out. And drove by previous owner...I've been searching for 3-4 months for a replacement.. They range from $2600 to $3500. And no one will rebuild mine for any less.. So my question is I have found on Craigslist a 97' dually rear 3.55 ratio..with drum brakes. no abs..for $700..that's all know. Don't know if it's a 70 or 80... haven't called yet..If I use the brake parts from my rear...will it be a simple conversion or just a big waste of time. That's assuming it's a Dana 80.. If anyone could help..it would be greatly appreciated.. thanks