Can you swap a 47 with a 650 trans?

[95Hailey7.3]

Hey everyone I was watching some YouTube videos and found out that in the 1999-2001 Ford offered a 6spd ZF S6-650 transmission behind their 7.3L PSD. I was wondering would you be able to swap the ZF S5-47 in a 1994 7.3L PSD with the ZF S6-650. If so what would you have to change? Is it as simple as swapping trans and your done or are the flywheel's different(size, weight, bolt patterns etc). They where both bolted behind the 7.3L PSD I think the only difference is they added an intercooler. I have heard the 47 is a good trans but having that granny gear in the 650 would be nice. What are your guys opinion between the two?

[85_305]

ZF6 needs new bellhousing, driveshaft, prolly master/slave, shifter, etc. Totally different.

[95Hailey7.3]

Originally Posted by 85_305

ZF6 needs new bellhousing, driveshaft, prolly master/slave, shifter, etc. Totally different.

That doesn't make sense, why would Ford totally redesign the back of a 7.3L PSD to accommodate a different transmission. Well I guess Ill just find a 1999-2001 7.3L PSD to go with the ZF S6-650.

[desertdeer]

when i looked into it i found its pretty straightforward. hydraulics are different, t-case will probably need to come from a superduty, and drivelines will be different. front will need to be longer, rear will need to be shorter.

it will bolt right up, clutches interchange, and their is very little wiring to deal with

edit- the 6.0 trans has a different input shaft and idk what else. find a 7.3 trans

[1Dieselman]

They didn't. You can put the 6 speed in your truck,it has been done. Keep in mind if you have a 4x4 your transfer case will not fit the 6 speed. Does use a different clutch disc, I believe you will need to rework the trans tunnel, and will require different driveshaft or shafts. Also the ZF-6 uses a trans cooler mounted in front of the radiator. IMHO after driving several ZF 6 equipped trucks unless you are doing a lot of heavy towing it wouldn't be worth the trouble because 1st gear is so low you hardly use it anyways.

[powerstroke2501997]

Or go with 4.10s with the 5sp for me my fist with 4.10s seems like freaking granny gear

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[backwoodsboy]

Like said above, unless you are hauling some serious weight there is no need for a zf-6. Everytime you stop at a red light you'll end up in third gear before you make it through the intersection.

[85_305]

Originally Posted by 95Hailey7.3

That doesn't make sense, why would Ford totally redesign the back of a 7.3L PSD to accommodate a different transmission. Well I guess Ill just find a 1999-2001 7.3L PSD to go with the ZF S6-650.

Because it's a totally different truck/motor that the 6spd went into over the 5spd 7.3's....

Originally Posted by desertdeer

when i looked into it i found its pretty straightforward. hydraulics are different, t-case will probably need to come from a superduty, and drivelines will be different. front will need to be longer, rear will need to be shorter.

it will bolt right up, clutches interchange, and their is very little wiring to deal with

edit- the 6.0 trans has a different input shaft and idk what else. find a 7.3 trans

Ya i was gonna say xfer case also but wasn't positive.


either way, just replace w/ what was in there. The 6spds are GREAT trannies, but I wouldn't spend MY time/money/pissed-offedness putting one into an OBS.

[terryknight]

Originally Posted by 1Dieselman

They didn't. You can put the 6 speed in your truck,it has been done. Keep in mind if you have a 4x4 your transfer case will not fit the 6 speed. Does use a different clutch disc, I believe you will need to rework the trans tunnel, and will require different driveshaft or shafts. Also the ZF-6 uses a trans cooler mounted in front of the radiator. IMHO after driving several ZF 6 equipped trucks unless you are doing a lot of heavy towing it wouldn't be worth the trouble because 1st gear is so low you hardly use it anyways.

what he said. we have both. with the 6spd in a dump truck with 3.73s loaded towing a trailer, i still only use L when off road or starting on a hill. also the trans cross members are different, the floor hump should no need to be modified though. clutch, pressure plate, flywheel are all different

Originally Posted by 85_305

Because it's a totally different truck/motor that the 6spd went into over the 5spd 7.3's....

the 7.3 block was the same. so the bolt pattern/shaft is the same.

[85_305]

Originally Posted by terryknight

the 7.3 block was the same. so the bolt pattern/shaft is the same.

Right... it's the same motor, but it's totally different