Tranny Swappin
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New User
Joined: Feb 2008
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Tranny Swappin
I have an 87 f-250, 460, 4-speed, and I was wondering for the sake of fuel efficiency and less rpms on the motor, are there and overdrive 5-speeds that are a direct bolt-in
Thank You
Cory Leffler
Thank You
Cory Leffler
Post Fiend
Joined: Mar 2002
Posts: 19,402
Likes: 38
From: Bonita Springs FL
The four speed also has a hydraulic clutch, but it's external to the bell whereas the ZF has a concentric clutch.
You probably can re-use the clutch pedal, but I'm not sure about the master cylinder. The slave, flywheel, and clutch kit all need to be replaced.
It's a lot of hassle for not much of a gain in mileage. You might get 1 or 2 mpg out of it. After all, you're still driving a 460.
You probably can re-use the clutch pedal, but I'm not sure about the master cylinder. The slave, flywheel, and clutch kit all need to be replaced.
It's a lot of hassle for not much of a gain in mileage. You might get 1 or 2 mpg out of it. After all, you're still driving a 460.
Elder User
Joined: Oct 2007
Posts: 819
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From: Maine
Originally Posted by 76scout
So you are saying it uses a different flywheel than the 4-speed? and why would the clutch pedal need replaced?
Sorry I miss read I thought it was auto....you would be fine with the flywheel. you would just need a clutch kit and a new clutch master cylinder, slave cylinder and new line . The pedal would be fine as well.
