Has it been done?
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Senior User
Joined: Sep 2008
Posts: 312
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From: Huntsville, Tx
Has it been done?
Hi guys popin in from the OBS Powerstroke side. I've got an 86 F-250 6.9L SC LWB 4sp 4x4, and i'm looking to swap in a ZF 5 spd cause of the O.D.. My question is what do i need to do the swap? I know i need a 4x4 ZF trans and matching flywheel, but what else? Any and all help and info is greatly appreciated, thankyou.
Post Fiend
Joined: Oct 2007
Posts: 10,501
Likes: 5
From: Faibanks Ak.
It has been done a lot, on this very page there is a couple ongoing threads for it.
You will have to decide what type of flywheel you want to use, and I think you will need the crossmember from the donor too.
You will have to decide what type of flywheel you want to use, and I think you will need the crossmember from the donor too.
Cargo Master
Joined: Mar 2010
Posts: 2,227
Likes: 149
From: Higginsville, MO
like star said there's 2 flywheel options. single mass and dual mass. the dual mass is the stock clutch system. but more expensive than single mass. if you convert to single mass. id use the south bend setup. seems pretty solid.
South Bend Clutch Catalog - Ford Clutch Kits
South Bend Clutch Catalog - Ford Clutch Kits
Lead Driver
Joined: Mar 2006
Posts: 5,098
Likes: 1,504
From: western SD
The transfer case from the 4sd will bolt to the ZF. When I put the ZF in my 85, all I used was the ZF and the crossmember. I used the 208 case that was behind the 4sd. The ZF and the T19 with the transfer case adapter were close enough to the same lenght that the driveshafts worked. I did however use a SMF conversion for a 7.3 IDI because I couldn't find the right clutch and pressure plate for the 6.9 that would fit the input shaft of the ZF.
Lead Driver
Joined: Dec 2002
Posts: 5,491
Likes: 16
From: Kuna ID
I believe you will also need the removable floor section that is above the transmission. The ZF plate is taller to clear the transmission.
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Lead Driver
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From: western SD
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