add on overdrive

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Feb 22, 2008 | 04:25 PM

#16

tbear853

Hotshot

Joined: Feb 2004

Posts: 10,860

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From: The Shenandoah Valley

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

Feb 22, 2008 | 05:00 PM

#17

masterbeavis

Postmaster

Joined: Aug 2000

Posts: 3,312

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From: Eldorado Ca. USA

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

Feb 22, 2008 | 07:42 PM

#18

leadmic

Fleet Mechanic

Joined: Feb 2002

Posts: 1,483

Likes: 273

From: Tulare U.S.A.

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

Feb 22, 2008 | 08:25 PM

#19

Behemoth

Laughing Gas

Joined: Aug 2007

Posts: 1,107

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From: Spokane, WA

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.

Feb 22, 2008 | 08:58 PM

#20

leadmic

Fleet Mechanic

Joined: Feb 2002

Posts: 1,483

Likes: 273

From: Tulare U.S.A.

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

Feb 23, 2008 | 12:06 AM

#21

frty7ford

Elder User

Joined: Jul 2004

Posts: 700

Likes: 0

From: Fairbanks

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

Feb 23, 2008 | 04:01 AM

#22

Gregg C.

Senior User

Joined: Jul 2004

Posts: 407

Likes: 0

From: ct.

Quote:

Originally Posted by Behemoth

Does anybody know if the GV OD unit will be a width issue to the side mount gas tank in a 4x4?

Mine is a 79 4x4 Supercab, with a C6 and a married NP205. From what I've read, the GV unit bolts directly to the rear output of the transfer case, and I'd just have to get a new one piece driveline, and do away with the two piece...that's my theory, anyway. As for room for the GV unit, I'm curious with my configuration if there will be clearance issues. I'm guessing I might luck out due to the longer cab, the GV unit might miss the side tank, but that's speculation at this point.

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.

Feb 25, 2008 | 10:59 AM

#23

460429_freak

Posting Guru

Joined: Dec 2002

Posts: 1,346

Likes: 4

From: missouri

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