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Old 11-30-2010, 11:39 AM
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4r100 or 4r70w

will one of these work where the other was? is it just a bolt up, or? i need to replace my tranny and i see both for sale on craigs list. its raining now, so iam not going to crawl under my truck to count pan bolts. anyway, i have a 1999 f150. are they the same bolt pattern from 4.6l and 5.4l? thanks
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Old 11-30-2010, 04:12 PM
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No. E4OD and 4R70W are totally different. E4OD is based on a C6 and 4R70W on an AOD
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Old 11-30-2010, 04:57 PM
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i meant 4r100 compared to 4r70w
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Old 11-30-2010, 07:32 PM
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No, you can't just bolt one in where the other used to be. The bolt pattern to the engine is the same between a 4.6L and 5.4L, but everything else is different. The length is different. The hardest part to overcome is that the wiring is different and the computers are different.
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Old 11-30-2010, 07:36 PM
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Thanks, That's What I was looking for.
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Old 12-01-2010, 03:38 PM
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i ended up getting a used 4r70w (thats what i had) what can i check out befor i install it to see that it will work? anything? or am i taking a gamble?
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Old 12-01-2010, 07:11 PM
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You could take it to a trans shop that has a transmission dyno. Not many do, but there are a few. It won't be free to test it, but it can be done.

Your other option is to tear it down and rebuild it. Most people just install a used one. Usually they work.
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Old 12-01-2010, 08:09 PM
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Are these hard to rebuild? I've done c6's before, but nothing electronic. I was going to try to fix the old one. No reverse and slipping in toward. Just happened all of a sudden with no warning. Btw, reps sent
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Old 12-02-2010, 03:52 AM
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They are a bit more complicated than a C6. You'll need a GOOD manual. ATSG or Helm, Inc, have good manuals.
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Old 12-02-2010, 04:10 PM
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any special tools needed? do i just replace the clutch discs or..... any info would be great. best place to get a kit?
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George, 92 f350 CC dually, Diy PSD conversion, 2wd, auto, long bed. 3in dp,no kitty.6637. 140v idm. PHP 6 pos, hpx,hot pedal.flux capacitor,281,000 and counting. rosewood stage ones.hers; 97 expedition, no mods yet!
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Old 12-02-2010, 04:10 PM
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