Dana 80 rear, GM Corporate 14 bolt

looking for Dana 80 rear or GM corporate 14 bolt.  also looking for 3.73 gears for the two differentials mentioned above and a dana 60 front.  thanks please email me at seventy468@yahoo.com  

Why not look for a AAM 11.5 instead? It is stronger than a D80 and more plentiful as it was used in 01 on Dmax and 8.1's and 93 on CTD's. Also judging by axles you want to run because of axle choice you should be looking for 5.13's or 5.38's not 3.73's.  

ok well ill just tell you what I am looking for and you suggest what I need.  I need a 3.73 gear in a strong rearend that can handle severe abuse.. What do you suggest?  

What I would suggest depends on how you plan to or define abuse.  

pulling truck abuse, with hardly any suspension in the rear.  its going to have ladder bars and solid bump stops.  

And tire size?  

33's. just out of curiosity what does tire size have to do with me wanting a dana 80 or corp 14 bolt?  

You asked me what you "need". Sure you can use a D80 with 33's but it is kinda a waste of money and weight in rear. Even a 14 bolt 10.5 FF is not really needed here. Even a 14 bolt 9.5 semi floater would do nicely. To me when you build you want to use part strong enough for needs yet as light as possible as extra weight is not asset off road or in a mud hole. 2 cents worth anyway...  

well he said pulling truck with solid bumpstops not mud truck so im pretty sure there is a monstor motor in the mix which is why he is looking for the giant axles, the strongest of the three mentioned is the AAM 11.5 cus of the 11.5 inc ring gear and nicely trussed and built case, the 14 bolt of course has its fame for being super strong and reliable too same for the dana 80, id go with aam 11.5 or corporate 14 bolt skip the dana  
Solid axle chevys can't be beat!
My dream truck: 73-91 chevy 3500 crew cab srw with dana 60/14bolt, 6 inc long travel lift with KING shocks, 37 inc tires and a 24v cummins diesel, nv5600 and np205

I will tell what would be a nice axle here for rear. A old Eaton/Rockwell HO72 that GM used until 72 in some HD pickups. It had a 12 inch ring gear with a adjustable thrust pad to limit ring gear deflection under severe loads and a removable pig like a Ford 9 inch. It was massive and bullet proof. It came in only two ratios too. 4.57 in 3/4 tons and 5.14's in 1 tons.  

where can i get a hold of one of these aam 11.5? do they even make a 3.73 for that axle?, Snoman sounds like what you just mentioned would be great, but also sounds like it might be hard to find/more expensive than the current diff that im looking for. also i really want to try the 3.73 gear. i apologize if i sounded like a jerk earlier, wasnt intended. basically what i need is one of those axles mentioned above does anyone have one?  thanks again to all for your input!  

hey snoman i saw one of those old axles you were talking about once in a junkyard, it was under a 72 3500 dually and i was tempeted to take tha axle home it is massive and has the removable section like a ford 9 inc but im sure the parts for this axle are hella rare, anyways the aam 11.5 came under the dogde hd pickups that had the cummins diesel, so if you can find one in the junkyards that would be good but i havn't seen any in my junkyards but there are plenty of 14 bolts, yes the aam 11.5 comes with a 3:73 ratio most of the trucks had that or a 4:10 ratio stock  
Solid axle chevys can't be beat!
My dream truck: 73-91 chevy 3500 crew cab srw with dana 60/14bolt, 6 inc long travel lift with KING shocks, 37 inc tires and a 24v cummins diesel, nv5600 and np205

There was actually a factory option of a Detroit Locker in that axle back then as there was no other LSD or Posi option for it. It like the 10.5 FF that replaced it had a 4 pinion spider gear setup. The only real bad thing about that axle is it only came in two ratios mentioned above and there was no aftermarket options for other ratios. Parts are still around but they are real sturdy and rarely fail even under extreme abuse. The 72 in the HO72 stood for a conservatively rated load capacity of 7200 lbs. They could not afford to build and use a axle like that today. To much material and labor involved with making it to be cost effective.  

I think his reasoning on 3.73 is the pinion is thicker  and ring gear has mass and more durable. Some times with big horsepower you stay away from the smaller pinions due to shock load and other things that happen un big hrspwr situation. I'm talking like 800hrsp and up 1800 hrsp and beyond. We ran 1800hrspwr mud truck with 4.10 gear and didn't go smaller because of pinion diameter and did the rest in tranny and chaindrive system/transfer case. We also had a quickchange gear box on another truck with a similar set up. We ran a 12 bolt rear end but would bend the tubes and have to change out from time to time,ladder bars on truck. This truck would carry the front tires nicely down the track if conditions were right. Tried to keep truck light as possible for mud racing. We could get 12 bolts anywhere and just change out gearing and spool.  

I always get a charge out of the logic people use to justify tall ratios with big tires. I find it amusing. You are going to break something else before you break a 4.56 or 4.88 in a 14 bolt, D70 or D80 or AAM 11.5. Then there is the extreme chassis twist with tall gears and big tires from drive shaft counter torque and then drive shaft and Ujoints. And then there is the effect on traction With tall gear and big tires as you wind up the rubber band to turn them the counter torque tries to lift RR tire (this is why RR always spins first with a open diff as there is no magic force holding it down and counter acting counter torque) With deeper gear you have less chassis wrapup, less driveline/drive shaft wrapup and less axle wrap and wheel lift putting same tractive effort down to ground. Also less motor mount strain too. Your rear axle is by far the strongest reduction unit in your drive train. Use it wisely and properly.