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Old 02-07-2012, 08:47 PM
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79 commander motor home tranny swap

Friend of has a 79 commander with a 440 motor and would like to swap the tranny for one with over drive could anyone suggest a possible make model and year he might try to find at wrecking yard ?

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Old 02-29-2012, 07:02 AM
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I would look at using a trans out of a Dodge diesel but I'm not sure about the bolt pattern for the block. He may have to use an adapter. Other than that, all the factory OD's have a small block bolt pattern and are smaller/weaker. Might take a look at Gear Vendors OD's for it....
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Old 02-29-2012, 11:31 AM
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Trans........

Hi, a 4L80 trans would work behind that 440.they are a VERY strong trans,BUT,you would PROBABLY have to have an adapter made for it...
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Old 07-16-2013, 12:58 PM
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Looking for tranny that that doesn't require computer system
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Old 07-16-2013, 09:01 PM
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no chrysler overdrive will bolt up to a big block there are adapters to bolt other units id personally keep the tf 8 thats in it with a heavy vehicle the overdrive would bogg down on mountains
there aways a gear vendor od unit that will bolt up on the back of the origional but very pricy
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Old 07-18-2013, 05:19 AM
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Quote:
Originally Posted by joshp83 View Post
no chrysler overdrive will bolt up to a big block there are adapters to bolt other units id personally keep the tf 8 thats in it with a heavy vehicle the overdrive would bogg down on mountains
there aways a gear vendor od unit that will bolt up on the back of the origional but very pricy
Why do people always think OD will make a vehicle bog down. News flash: at that point the transmission DOWNSHIFTS.
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Old 07-18-2013, 09:11 AM
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Look into the Gear Vendors Unit. Keeps the original trans, no cutting or hacking. Keep an eye on eBay and CL. Used units come up often. I got the one I am putting in my Astro for a grand... Nothing wrong with it and it saved a TON of money building and wiring an electronic OD Trans stout enough to live behind the 509... I went with a built 400 using all of the internals from Jakes...
Even if he pays new prices it is an easier swap then a late model OD trans. By the time you get the trans rebuilt and get a wiring harness you will be looking at 2 to 3K, easy...
Mark
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