ZF-6 behind an IDI

tractorman86 · Dec 13, 2008

so from every tragidy comes a silver lining, some remember back in july when i tried to kill myself with my dad's 7.3/6-speed superdukey, right? :angel:

well he told me the other day that he was going to part it out, so having the oppertune time i asked about the 6-speed and gooseneck hitch... it is a go!!!

i also have an np205

i can't wait!!!

LCAM-01XA · Dec 13, 2008

BUT! will the ZF-6 bolt up to your IDI?

wanabebig · Dec 13, 2008

it takes some work.. i remember on tds a guy did it and he said it wasn't a direct bolt on.. u had to do some fabrication.. but i don't remember what all he had to do to get it hooked up.

Metalmacguyver · Dec 13, 2008

Where is the 6th gear in those trannys? Is it a second overdrive gear? If so is it between 4th and 5th or after 5th as far as the ratio is concerned?

LCAM-01XA · Dec 13, 2008

wanabebig said:
it takes some work.. i remember on tds a guy did it and he said it wasn't a direct bolt on.. u had to do some fabrication.. but i don't remember what all he had to do to get it hooked up.

That's what I thought too - well, he'll have fun, that's for sure

F350farmboy · Dec 13, 2008

You wont have a speedo though...unless you can rig up the speedometer. The ZF-6 doesnt have a speedo gear in the tail housing but instead it picks it up electronically from the axle housing.

Other than that I heard it was a bolt in swap.

94f450sd · Dec 13, 2008

coming off of a 7.3 it should share the same bellhousing bolt pattern at the very least.not sure about the clutch and hydraulic parts though.

tractorman86 · Dec 13, 2008

from what i've heard from (bigredtruck?) i think who did the swap the bolt pattern is almost the same just wider on the top two bolts on the 6, and you have to use a psd clutch and a solid flywheel redrilled for the clutch, and of course a new crossmember. i'm not too worried about the speedo, i havn't had a working one for about 2 years LOL

. IIRC the "6th" gear is just taller than our 5th but the 1st gear is lower than our 4 and 5 speeds.

towcat · Dec 13, 2008

"Jaybee" is the guy you need to search for. Do keep in mind, he's a automotive engineer with some serious custom fab skills and has the facilities to do so. the final gear on a ZF6 is almost the same as a ZF5. the difference is a finer split between 3, 4 and 5. very handy for towing heavy, almost totally worthless running empty.

69dieselfreak · Dec 13, 2008

ill buy that 5spd and transfer case from you help fund the 6spd project

82F100SWB · Dec 13, 2008

To run the ZF6, you need to run it's transfer case too, it has a larger output shaft than the older trucks do. So, that NP205 is pretty much useless to you.

tractorman86 · Dec 13, 2008

thanks for the name calvin, i do know it will be a BIG undertaking but i think the outcome would be well worth the effort. i'll let you know when i do it kevin, maybe i'll even sell ya the southbend clutch with it.
It is a divorced 205 so i can have a custom intermediate shaft made, i'll have to have one made anyway.

69dieselfreak · Dec 13, 2008

ya let me know when you do and if you need any help let me know

tractorman86 · Dec 13, 2008

right on man!

BigRigTech · Dec 14, 2008

A friend of mine put a 6spd behind the PSD in his 96 F350 dually 4x4....Not as much work as an IDI but it still took some fabrication. Then his buddy borrowed the truck, a trans cooler line took a dump while driving and the trans is now seized solid.

...They are extremely hard to find used if something happens to them.

....His truck has been sitting for a year now as he doesn't have the dough to buy a reman 6spd.

ZF-6 behind an IDI

tractorman86

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LCAM-01XA

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wanabebig

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Metalmacguyver

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LCAM-01XA

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F350farmboy

The Hornet

94f450sd

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tractorman86

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towcat

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69dieselfreak

well that nice

82F100SWB

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tractorman86

Registered User

69dieselfreak

well that nice

tractorman86

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BigRigTech

Diesel junky

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