how hard is too convert a 2wd zf to a 4wd zf?

[Ryanohn]

ive read that you can pull the tail housing off the zf. but can you swap the tail housing with 4wd tail housing. is there more work that has to be done to it ? or is just straight forward swap out ?
i would like to have 4x4 but i can always get a divorce transfer case

 

[drinkypoo]

I've read you have to rip all the guts out in order to swap the tail housing

 

[Oog]

You do. Mainshaft is different. Idk where you are but i have a good 4wd zf sitting out back. Southern il

 

[Mike-M]

i havent seen a 2wd one, but i have a few different 4wd zf's in my pile now, and there really is no tail housing. The rear half of the main housing and what would be considered the tail are 1 piece. If you replace it, theres bearing re-shimming involved.

 

[93blklightning]

I bought another 7.3 and trans from a F-SUPERDUTY several years ago . Got a killer deal on it, but it was a 2wd truck. So I went to check it out to see if it might work on my 4wd. Come to find out , the 2wd and 4wd transmissions are the same in the ZF's ....for the SUPERDUTY trucks anyway , all I did was remove the e-brake assembly , and bolt up my transfer case .

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[93blklightning]

By the way....you wouldn't happen to need an e-brake assembly for a SUPERDUTY would you? Haha

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[93blklightning]

I bought another 7.3 and trans from a F-SUPERDUTY several years ago . Got a killer deal on it, but it was a 2wd truck. So I went to check it out to see if it might work in my 4wd. Come to find out , the 2wd and 4wd transmissions are the same in the ZF's ....for the SUPERDUTY trucks anyway , all I did was remove the e-brake assembly , and bolt up my transfer case .

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Sent from my XT907 using Tapatalk

 

[93blklightning]

Oh yea...don't fool with trying to remove the tailshaft housing . Unless you want to disassembled the whole transmission

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[Ryanohn]

i havent seen a 2wd one, but i have a few different 4wd zf's in my pile now, and there really is no tail housing. The rear half of the main housing and what would be considered the tail are 1 piece. If you replace it, theres bearing re-shimming involved.

do you know what the change in shimming would be.

i would like the gasser gears in the zf, that the 7.3 is in my play truck. i would like a good creeper gear for the trails

 

[79jasper]

I would change axle gears before changing trans gears.

But if that's you thing, you can swap all the guts from a 4x4 gasser trans (big block) to your diesel front case half.

There's no one specification on shimming.
You have to check bearing preload. Long tedious process of pulling the case back apart, putting together, measure, back apart, etc.


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[Ryanohn]

I would change axle gears before changing trans gears.

But if that's you thing, you can swap all the guts from a 4x4 gasser trans (big block) to your diesel front case half.

There's no one specification on shimming.
You have to check bearing preload. Long tedious process of pulling the case back apart, putting together, measure, back apart, etc.


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okay that helps a lot. i plan on going to like 4.56 soon or later

 

[Mike-M]

i would like the gasser gears in the zf, that the 7.3 is in my play truck. i would like a good creeper gear for the trails

Thats what I did. 2nd gear is perfect for starting off now, reverse is noticeably better too. mine is from a '97ish 460.

do you know what the change in shimming would be.

you know how the bell and front case are one piece? the shims are inside there, and its gonna be different for each application.