aod in 79 bronco
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From: northwest Georgia
aod in 79 bronco
I put this in the transmission forum but noone seemed to be able to tell me anything. Maybe someone here can help. I've got an extra aod sitting around and i'm thinking about putting it in my 79 bronco. I know that i will need an adapter for the 351m to bolt to it and i know the np205 will bolt to it, but will it be worth doing? i know that the aod is not as strong as the c6 in it but i need an overdrive to be able to keep driving it. I've considered the zf s542, but it seems to require a lot of work as the input shaft is too short and it requires a hydraulic clutch. Its also expensive and i already have the aod. Plus i wouldn't need to cut out an extra hole in the floor and the linkage should just bolt up to the c6's. Im basically wondering if i get a heavy duty rebuild kit, would it be worth doing? I'd love the overdrive but i dont wanna be pulling a fried transmission out in a year or so from the torque the engine makes. Sorry for the long post and thanks for any help.
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Your AOD will fit but you need one that came off of a 351M/C, 400 or 429/460. The bell housing is different on the other applications. You will also need the throttle presser cable, its not just kick down on the AOD it’s the life line to the trans. It controls the internal presser and if it is not set right the trans will Burn-up. I believe that you will need to move your cross member back a little also.
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Originally Posted by mrknight01
Your AOD will fit but you need one that came off of a 351M/C, 400 or 429/460.
Last: 351C-1974; 351M/400-1982 (cars-1979); 429-1974. Trucks, Bronco's and Econolines never offered a 351C or 429. 460's used C6's till the advent of the E4OD.
Last edited by NumberDummy; Oct 22, 2007 at 03:34 AM.
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From: northwest Georgia
yeah, i knew the aod wouldn't bolt to the 351m but i was looking at an adapter plate. Then i saw the Ultra Bell bellhousings that are half the price and do the same thing. Only thing is you have to cut off the bellhousing to use the new one. I was thinking, could i just do this myself? I've got an extra c6 and i think i might be able to just cut the bell housing off of it and weld it onto the aod instead of buying one. Also, the aod was just rebuilt and a website that sells aod performance stuff says their basic rebuild includes all stock quality parts and its good for 300 horsepower. So does that mean that the stock aod is good for 300 horsepower? Or do i need to rebuild it again using heavy duty parts?
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The stock AOD is fine up until 300 horses. I'd like to reitterate what mrknight01 said though: "You will also need the throttle presser cable, its not just kick down on the AOD it’s the life line to the trans". This is more important than most back yard mechanics realize.
That being said: also remember the bell housings are aluminum and welding them might be tough if you don't know how to, or have the proper equipment for welding thick aluminum.
If you don't mind me asking, why do you need the OD?
That being said: also remember the bell housings are aluminum and welding them might be tough if you don't know how to, or have the proper equipment for welding thick aluminum.
If you don't mind me asking, why do you need the OD?
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From: Ontario
Sorry it took me a couple of days to get to you.
If you google Danny Cabral or Danny Cabral C6 to AOD it will bring up a really nice article by you guessed it Danny Cabral on how to do this very thing.
I have printed off the article because I plan on doing this one day down the road on my 1978 Lariot Bronco.
Hope this helps.
Rick.
I have printed off the article because I plan on doing this one day down the road on my 1978 Lariot Bronco.
Hope this helps.
Rick.
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From: northwest Georgia
The c6 just doesn't cut it doing about 2000 rpm at 60 miles per hour. I know thats not that bad, but this bronco is for trail riding and long camping trips mostly and about 25-30% offroading. I figure the first gear ratios in the c6 and aod are close enough to not hurt the offroading part so why not add an overdrive? yeah, i know i need the right cables for it. I might just bite the bullet on this part and buy new ones instead of hunting through junkyards for close ones. I personaly can't weld aluminum, but my dad can, very well. Already had experience with that! Had to weld a clutch mounting bracket on a jeep transmission that broke off after about three pushes of the clutch. That was fun. So you think the aod will be fine for now as the 351m only has 165 hp stock? I do plan on a mild build in the future though. i want about 260 hp and 350-380 ft/lbs of torque. Would it be ok then?
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From: Simi Valley, CA
The original AOD's were a troublesome turd of a transmission that due to heat buildup caused by the constant shifting in/out of overdrive in heavy traffic, fried the transmission. The warranty claims dollar amount back then were HUGE!
Two things: Add an external cooler, and stay out of O/D in heavy traffic.
Two things: Add an external cooler, and stay out of O/D in heavy traffic.
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From: northwest Georgia
I was definitely going to add an extra cooler and i know about the od shifting problem. My brother has an 89 and his shifts about every 2 minutes going down the road. I think his tv cable is just too loose though.
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Yep, the AOD will work well for you, if you take care of it. I would keep it out of OD until you are on the freeway. If you have to pull any grades, slow down to below 60 and then put it down into drive manually. Run a big cooler too.
The HP rating on the old 351m's is comparable to the 302's they put the AOD behind from the factory, so that will be the least of your problems. The upgrades you want to do in the future might warrant a good shift kit, but that shouldn't run too much either.
It's good that your Dad can weld aluminum. Measure everything out, and use the C6 bell housing. The worst thing that can happen is it won't work. :-)
The HP rating on the old 351m's is comparable to the 302's they put the AOD behind from the factory, so that will be the least of your problems. The upgrades you want to do in the future might warrant a good shift kit, but that shouldn't run too much either.
It's good that your Dad can weld aluminum. Measure everything out, and use the C6 bell housing. The worst thing that can happen is it won't work. :-)
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Haha, yeah, that and i would then have two hacked up transmissions! Hey, on a related note, this transmission was given to me because the guy was afraid it was rebuilt wrong. So he just forgot about installing it and bout a used one because this one wont turn. Is it normal for a newly rebuilt transmission to be hard to turn? Maybe due to the new clutches? Or am i going to be rebuilding it again?
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http://www.lentechautomatics.com/aodproducts.html
If you want to spend the money. They offer a custom bellhousing to bolt it up to a big block ford. They are rated for up to 800hp.
You do not have to move the crossmember back unless you use and adaptor plate instead of the custom bellhouseing. A friend of mine did it to an F-250 (78) a few years ago and has not had and problems...... But he has 6 Ford trucks so he only drives the 250 once a week at best and that is usually around the farm.......He has pulled some pretty heavy hay trailers with it but never more than 30 miles or so.
The truck has 35" BFGs and 3.55 gears. The 400 will roll smoke....it is a damn strong motor.
If you want to spend the money. They offer a custom bellhousing to bolt it up to a big block ford. They are rated for up to 800hp.
You do not have to move the crossmember back unless you use and adaptor plate instead of the custom bellhouseing. A friend of mine did it to an F-250 (78) a few years ago and has not had and problems...... But he has 6 Ford trucks so he only drives the 250 once a week at best and that is usually around the farm.......He has pulled some pretty heavy hay trailers with it but never more than 30 miles or so.
The truck has 35" BFGs and 3.55 gears. The 400 will roll smoke....it is a damn strong motor.
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Thats what i want in the rebuild of the motor later on. I'll make it a 400 with a mild cam, straight up timing, better intake, and MAYBE aftermarket pistons. I think the aod can holdup.
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From: sunny fla sometimes windy
http://fordfuelinjection.com/index.php?p=65
Scroll down to Bauman. If you are going to do all that work just get this and get a tranny that will last!! I suggest getting a trans temp gauge and the cooler, The temp
gauge can let you know when things are getting out of hand, and let you change gear
driving style or shut it down!! I would get a digital one since the response is quicker
you should see the numbers climb in the drive thru or driving down a slow trail!!
Scroll down to Bauman. If you are going to do all that work just get this and get a tranny that will last!! I suggest getting a trans temp gauge and the cooler, The temp
gauge can let you know when things are getting out of hand, and let you change gear
driving style or shut it down!! I would get a digital one since the response is quicker
you should see the numbers climb in the drive thru or driving down a slow trail!!
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From: northwest Georgia
i don't plan on buying another tranny since i have one already. Just doesn't seem like the economical thing to do since i'm on a budget. Would it be nice to have the insurance? Yes. But i dont have the money for a new tranny.
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