A man could take a '64 Dodge 3 speed transmission, mount it backwards, rig a shift lever to select either high or 2nd, high would be straight and 2nd would then be OD. Mount same in rear drive line, only use the new OD in 2 WD.

LOL

 

Or just mount a NP205 backwards, that would be a killer OD gear, .50!!

 

I dont know if the link will make it but if you want a AOD try here - http://www.lentechautomotive.com/
If the link dident make it google lentech. They make a AOD with a removable bell housing and have bell housings to fit 460, 351m, and 400. They also make one to fit FEs. Their not cheep but if you need a tranny rebuild anyway it makes sense. They have AODs that will take 1000hp. I looked into getting one for a FE.
leadmic

 

The only thing about the AOD's that would concern me is the strain from weight differential. Granted, companies like Lentech, Art Carr, etc. can make an AOD that'll handle lots of horsepower, but I'd wonder about what kind of torque numbers they'd handle. Even then, I'd still wonder about their longevity, just from having to move more weight than they were originally designed to do. For example, the AOD came in most any Fox chassis vehicle (Mustang, Mark VII, Thunderbird, Cougar, Zephyr, Fairmont), but the curb weight of these vehicles ranged from about 3300 lbs to 3800 lbs. Now, I don't know about everyone else's ride here, but I know that Buford weighs in at 6200 lbs. running completely empty except for driver. I guess I'd just be skeptical about the AOD's ability to adapt to having to move twice the weight it did before on a regular basis.


I guess my point is that I'd be worried about the lifespan of an AOD with relation to it's ability to overcome the inertia issue due to a heavier vehicle, on a day in-day out basis. But, what the heck do I know? They could last forever, but my gut tells me that's not going to be the case.

 

If you have a 80-90s pick-up or Bronco with a 302 most of the time it will have a AOD.
Lentech makes a AOD for towing.
Leadmic

 

I am planning on puting a gearvendor od in my 77 it will take the hp and tq that my 460 can put out and is as strong as the c6. they make two versions one to bolt to the trans or transfer case and that is divorced from it. I have talked to them they are very friendly and willing to help. a lot of questions can be answered by going to their websight at http://www.gearvendors.com/
I found out about the divorced unit when i was looking at adding it to my 47 . Us gear also makes one but i did not like the fact that you have to lift off the throttle to get it into gear. either way you go good luck

 

No clearance issues with side tank. Get the unit and have new rear driveshaft made up and you'll love it. My SC is in my gallery. I'll see if I can take some pics of the GV unit for you later if I ever finish pushing snow around.

Sweet truck your building by the way.

 

well I've got a Dough Nash overdrive. in my 87 diesel it won't hurt your truck.. I pull 4 tons with it behind a deisel engine any never give me any problems... but mine is 2wd auto