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Feb 16, 2014 | 12:04 PM

1969furd

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zf5/6

will a zf5/6 bolt in behind a 4.2 V6? its in a 07 f150

Feb 16, 2014 | 01:28 PM

Mark Kovalsky

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No it will not.

Feb 16, 2014 | 05:04 PM

1969furd

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ok just curious why not? i kinda miss the big truck trans feel, plus mine feels like it needs a rebuild.

Feb 16, 2014 | 05:40 PM

Mark Kovalsky

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Because the bolt patterns are different.

Feb 16, 2014 | 05:41 PM

1969furd

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ah ok that is perfect, thanks, figured it was worth the shot right? also is it possible to rebuild the Mazda tranny without the synchros?

Feb 16, 2014 | 10:50 PM

85e150

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Quote:

Originally Posted by 1969furd

ah ok that is perfect, thanks, figured it was worth the shot right? also is it possible to rebuild the Mazda tranny without the synchros?

You mean to just leave the existing synchros in there? Yes.

Feb 16, 2014 | 10:59 PM

1969furd

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no as in REMOVE the synchros and rebiuild it without them

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Feb 17, 2014 | 12:18 AM

1969furd

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Quote:

Originally Posted by 85e150six4mtod

Probably not. Why would you do that? I drove an old non synchro Clark a few times and it was terrible.

becuae i drive a CMV with a non syched 10 speed, and kinda got used to it lol

Feb 17, 2014 | 01:57 PM

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85e150

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Apples and oranges. You will not make your trans operate like an HD trans by removing the synchros. Shift it as designed and enjoy it.

Feb 17, 2014 | 03:14 PM

#11

Mark Kovalsky

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Quote:

Originally Posted by 1969furd

becuae i drive a CMV with a non syched 10 speed, and kinda got used to it lol

To make it shift like that you'll need to remove the synchros AND replace all of the gears with straight cut gears. The gears in there now are helical cut. They are not going to ever shift like the 10 speed you're used to without changing the gears.

Nobody makes straight cut gears for this trans, so you will need to design them and have prototype gears cut. When we had this done at Ford we would usually spend close to $1 million to get a prototype set designed and made. Maybe you could get it done for less.