Trans Swap
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Freshman User
Joined: Dec 2008
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Trans Swap
79 Bronco with the 400 engine. right now it has the c6. im lookin to put a fmx trans in there. what will i have to worry about? can i just take the tailshaft housing of the fmx and bolt up the transfer case?
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Freshman User
Joined: Dec 2008
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not trying to gain anything by it. dont know anything about the FMX tranny, not sure if they ever put it in any trucks or not, just the fact that the C6 went out and a friend of mine has a FMX i can buy from him cheap but didnt know if it will work going into a truck.
Lead Driver
Joined: Feb 2002
Posts: 7,970
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From: Greater Austin, Texas
Your main concern should be what engine the FMX came off of. You gotta have the correct bellhousing to bolt up to your 400. Most of the FMX's were behind 302s and 351Cs which won't have the same bellhousing pattern. You need one that was behind a 351M.
Lead Driver
Joined: Sep 2002
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From: Gateway to the West
The FMX never found its way into a 4WD truck so the likelihood of finding one with a t-case adapter tail-housing will be um, lets say... difficult. The C6 was followed by the AOD which is a derivative of the old FMX unit. I don't know if the AOD is similar enough that you could swap tail-housings from one to an FMX.
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Freshman User
Joined: Dec 2008
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thats what i was afraid of, i dont know much about the FMX but do know i have never heard of them being in trucks. thanks for the info guys.
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New User
Joined: Jan 2010
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I tried the swap once from my 78 T-bird to my Bronco just one problem after another not worth the mess. If the 4WD is good a rebuild on a C6 at most $1300. I had my tranny and 4WD system done at Aamco for $2200.
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