ZF swap help
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Junior User
Joined: Nov 2010
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From: Roblin,Ontario
ZF swap help
i have a 1986 f250 extended cab with the 6.9 diesel,use to have a stick in it but didnt get a tranny with the truck.
looking for someone who's done a zf swap?
from what i found on the internet there are three different ones. doesnt it matter which one i get?
what will i need to get from the donor truck?
if someone has found a write up that would help me please sent me what you find greatly appreciated . just want to know what im getting in to before i start, and what parts im going to need. would like to have everything before i start.
thank the help
looking for someone who's done a zf swap?
from what i found on the internet there are three different ones. doesnt it matter which one i get?
what will i need to get from the donor truck?
if someone has found a write up that would help me please sent me what you find greatly appreciated . just want to know what im getting in to before i start, and what parts im going to need. would like to have everything before i start.
thank the help
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From: Cornfield in Nebr.
Post Fiend
Joined: Jan 2005
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https://www.ford-trucks.com/forums/9...a-5-speed.html Have a read here also. Any ZF you get must have come from another diesel and must either be a 4x4 one or 4x2 depending on what you have.
Post Fiend
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From: Roblin,Ontario
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pedant
Joined: Jan 2008
Posts: 23,576
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From: EXTREME southwest CT
Dave,
There are two torque ratings 420 & 470 foot lbs. (ZF-5 42 & 47)
There are three bellhousings. Small block, 385 block and Diesel.
The diesels get a close ratio (taller first gear) than the big block.
Because they are rev limited and have more torque they aren't seen to need a 5.72 first, and only get 4.14.
Edit: Plus, of course the difference in tailhousings between 2wd and 4x4
There are two torque ratings 420 & 470 foot lbs. (ZF-5 42 & 47)
There are three bellhousings. Small block, 385 block and Diesel.
The diesels get a close ratio (taller first gear) than the big block.
Because they are rev limited and have more torque they aren't seen to need a 5.72 first, and only get 4.14.
Edit: Plus, of course the difference in tailhousings between 2wd and 4x4
Fleet Owner
Joined: May 2009
Posts: 21,437
Likes: 76
From: Gilbert, PA
To the OP. you either need a 4x4 trans from a diesel OR a trans from a 1988-97 diesel F-superduty(also reffered to as a F450 but it is not really)
There are actually more than tq differences between the zf5 s42and the zf5 s47
The s42 gear ratios(for a diesel)1987-95
1st Gear:
4.14
2nd Gear:
2.37
3rd Gear:
1.42
4th Gear:
1.00
5th Gear:
0.77
Rev Gear:
3.79
The s47 gear ratio(for a diesel)1995-99
1st Gear:
5.08
2nd Gear:
2.60
3rd Gear:
1.53
4th Gear:
1.00
5th Gear:
0.77
Rev Gear:
4.66
There are actually more than tq differences between the zf5 s42and the zf5 s47
The s42 gear ratios(for a diesel)1987-95
1st Gear:
4.14
2nd Gear:
2.37
3rd Gear:
1.42
4th Gear:
1.00
5th Gear:
0.77
Rev Gear:
3.79
The s47 gear ratio(for a diesel)1995-99
1st Gear:
5.08
2nd Gear:
2.60
3rd Gear:
1.53
4th Gear:
1.00
5th Gear:
0.77
Rev Gear:
4.66
Moderator
Joined: Jan 2001
Posts: 57,005
Likes: 2,750
From: Virginia
Looks like they wised up on that later zf. I love my zf, but I do not like it's reverse gear. It's too fast. Ok for unloaded normal backing up, but anything else means slipping the clutch or putting it in low range. I honestly don't know what a person does with this early transmission in a 2wd truck. Can you imagine trying to back up with a loaded trailer and not having low range from the transfer case?
Fleet Owner
Joined: May 2009
Posts: 21,437
Likes: 76
From: Gilbert, PA
Looks like they wised up on that later zf. I love my zf, but I do not like it's reverse gear. It's too fast. Ok for unloaded normal backing up, but anything else means slipping the clutch or putting it in low range. I honestly don't know what a person does with this early transmission in a 2wd truck. Can you imagine trying to back up with a loaded trailer and not having low range from the transfer case?