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Old 06-24-2005, 04:56 PM
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Transmission swap

The transmission that I have in My 1984 chevy 4x4 pickup is improperly functioning. It is going to blow soon. I was wondering what it would take to get a rebuilt 700R4 tranny out of a 1980's special edition trans am to fit in place of my TH400. I have the 700R4 but I don't know if it would need to be modified much to fit. Any help would be appreciated.
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Old 06-24-2005, 06:31 PM
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O'Flaherty,
Start here...
http://www.transmissioncenter.net/Tr...asurements.htm
First off, I am not a transmission expert by any means.
I believe you would want a 700R4 out of a 4x4.
Besides that...
The 400 is about 5 inches longer to the trans mount than the 700r4(according to the chart).
You would need to move your trans crossmember, and have a driveshaft of the correct length.(buy a longer one and have it shortened). I believe the trans yoke is also different, so that would also need to be replaced.(can be done at the same time as shortening and re-balancing)
You will also need to find the TV cable/manifold brackets for a 1984 chevy with the same carburetion as your vehicle.
That's about it.
Personally, I would try to find a 1985 or newer 4x4 700R4.
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Old 06-24-2005, 09:02 PM
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you will need a 4x4 700 tranny and the matching transfer case to swap into your truck.

the t-400 output shaft is larger than the 700 , so you need the matching parts & transfer case to swap out.


As mentioned:

You will need the 700r4 TV cable hook up items at the carb. Filler tube / dipstick , converter lock up kit
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