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post #1 of 4 (permalink) Old 03-01-2010, 11:40 PM Thread Starter
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4R70W Upgrade

I want to upgrade my 1994 mark viii transmission to the 1998 later 5.4 truck transmission. Can someone help me with what I need to make this happen? Please Help
Seion Kelley
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post #2 of 4 (permalink) Old 03-02-2010, 12:00 AM
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You don't use a truck transmission. Get something from a car at least from 1999.

--Chris

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post #3 of 4 (permalink) Old 03-02-2010, 06:16 AM
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Actually I start most of what I do with a 5.4 truck transmission if it's for a 4R70W. The reason for this is that they have the hardened gearset parts. The problem with this for the average person is that they are going to need a valve body from a car transmission and using their older one isn't the solution.

Just make sure you don't get a 4x4 truck transmission unless you are planning to tear it down completely to replace the output shaft.

Darrin

01 F150 5.4L 4x4 and a 98 Mustang GT vert sitting engineless and without transmission or converter


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post #4 of 4 (permalink) Old 03-02-2010, 03:13 PM
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That's what I was mainly pointing out, the valve body.

--Chris

DirtyDog Torque Converter For Sale!!
Huge Parts Sale!!

1996 Thunderbird LX
Awaiting some tender deconstruction...
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