460 ZF same as 7.3 ZF? - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 17 (permalink) Old 07-29-2009, 12:10 AM Thread Starter
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460 ZF same as 7.3 ZF?

I found a rebuilt zf5 trans for sale but it is oringally out of a gas 95 460 trans...

Would this work to replace my zf5 in my 7.3?

Or if I could swap the internals from one to the other.

1996 crew cab long box. 3.73s, auto 493/1135 stockish auto trans.
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post #2 of 17 (permalink) Old 07-29-2009, 12:27 AM
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Re: 460 ZF same as 7.3 ZF?

IIRC case is the same but internals are different, including the light duty converter.

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post #3 of 17 (permalink) Old 07-29-2009, 12:30 AM
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Re: 460 ZF same as 7.3 ZF?

From my research for my '56 ford 460 swap is the case and the gear ratios are different between the 7.3 and the 460 zf's. FWIW

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post #4 of 17 (permalink) Old 07-29-2009, 02:51 AM
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Re: 460 ZF same as 7.3 ZF?

the bell housing bolt pattern is different form a BBF to a diesel

Looking for Blue 40-20-40 seat for OBS. PM me if any known
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post #5 of 17 (permalink) Old 07-29-2009, 03:07 PM
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Re: 460 ZF same as 7.3 ZF?

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Originally Posted by powerstrokinc View Post
IIRC case is the same but internals are different, including the light duty converter.
There is no converter on a ZF-5.

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Originally Posted by dstruble View Post
From my research for my '56 ford 460 swap is the case and the gear ratios are different between the 7.3 and the 460 zf's. FWIW
I do not know the answer to this, don't see there being a difference in gearing.

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Originally Posted by diesel_brad View Post
the bell housing bolt pattern is different form a BBF to a diesel
The 460 and 7.3IDI and PSD all share the same bellhousing to the best of my knowlegde.

I would think the only major diff would be the clutch/flywheel. Someone will chime in with good info.

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post #6 of 17 (permalink) Old 07-30-2009, 12:43 AM
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Re: 460 ZF same as 7.3 ZF?

I know that when you do a cummins conversion, they sell different adapter plates for the gas zf5 and the diesel zf5, so they have to be different.

The s5-42 tranny has different ratios than ths s5-47. The s5-47 was mostly used in the DI powerstroke and required a synthetic fluid. It was also rated for a little more torque

s5-42 s5-47
Rev 5.24 3.79
1st 5.72 4.14
2nd 2.94 2.37
3rd 1.61 1.42
4th 1.00 1.00
5th .76 .76


Clutch is different too, of course.

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post #7 of 17 (permalink) Old 07-30-2009, 02:38 PM
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Re: 460 ZF same as 7.3 ZF?

Zf gearing changes between a 42-47 and a gasser(close ratio) and a diesel (wide ratio)ZF Manual / Standard Transmission Identification Parts and Diagrams

And yes the BBF is a differnt bell than a Diesel. You can use em but you have to heavily modify

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post #8 of 17 (permalink) Old 07-31-2009, 01:05 AM Thread Starter
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Re: 460 ZF same as 7.3 ZF?

What are ways that I can tell a BBF zf from a PSD ZF?

Doesnt the gas zf use a internal slave cylender (not to sure on the big block ones)



Heres the one for sale.


And here is mine I pulled yesterday.


Take in mind the guy selling this has numberous ZF5s and isnt sure if this was a gas or a diesel trans.

1996 crew cab long box. 3.73s, auto 493/1135 stockish auto trans.
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post #9 of 17 (permalink) Old 07-31-2009, 01:53 AM
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Re: 460 ZF same as 7.3 ZF?

it looks like the alignment dowl is different on what is the right side as you look at the pics.Hell left side too somewhat

What would it take to put a ZF6 in there?


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post #10 of 17 (permalink) Old 07-31-2009, 02:20 AM
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Re: 460 ZF same as 7.3 ZF?

Got one of each here at the shop. Bellhousings are different for sure.
Not sure on gear ratios, but I havew swapped out the zf in a 95 powerstroke OBS rollback, and one from a 96 reg cab f-250 powerstroke.
The f-250 had the lower first gear. Both were factory trannies.
So, it may not be a gas vs diesel thing, might be just different build dates, or possibly just optional gearing, or maybe even different for trucks with different rear gears as the 350 rollback has 5.13 I think, and the 250 had 4.10

It is very easy to swap the case as long as you turn the right side up before slidng it apart! hahah
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