Trany Conversion Advice Sought
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Senior User
Joined: Nov 2006
Posts: 294
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From: Northern New Mexico
Trany Conversion Advice Sought
A friend of mine blew the C6 in his 1987 F-250. Now he wants to install a Warner T18 4 speed. He built a flatbed for it and plans on using this for a firewood hauler. It is a 2 wheel drive truck with a high diff ratio. Hence his perceived need for a 4 speed with compound low. The engine is a 351 so, in theory, there ought to be 4 speed compatibility. he has lined up a tranny, bell housing, clutch assembly and is working on the pedal linkage. So, my question is this a reasonable conversion that can be completed by a guy with some experience or are there pitfalls he is heading for? I guess he is planning on some kind of hydraulic clutch set up. Would a mechanical clutch be more appropriate or simpler? he has never done a conversion of this type but he has replaced trannys and completed clutch installations before. Comments and advice are appreciated. This guy is not computer literate so I offered to post this inquiry for him. Thanks in advance for any comments.
FTE Legend
Joined: Jun 2006
Posts: 31,930
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From: Ottawa, Ontario
These trucks also came with the ZF 5-speed too so I don't quite understand why somebody would use a 4-speed.. unless the ZF just isn't available in the area or is quite a bit more expensive than the 4-speed.
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Senior User
Joined: Nov 2006
Posts: 294
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From: Northern New Mexico
Price is one issue the other is our roads here. Just two lane pavement and a lot of washboard dirt roads. Overdrive is nice but not really needed. This truck has a tall rear end ratio so direct drive ought to work fine for this guy's needs.
pedant
Joined: Jan 2008
Posts: 23,576
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From: EXTREME southwest CT
You need the hydraulic clutch pedal assembly.
Mechanical clutches were found in the 351M, until 1983.
I would suggest installing the *small* firewall reinforcing bracket while the pedals are out to prevent popped seams and tearing. (pandemic to these trucks)
Check TSB 90-16-7
E3TZ 7K509 A for the small $15 kit
Mechanical clutches were found in the 351M, until 1983.
I would suggest installing the *small* firewall reinforcing bracket while the pedals are out to prevent popped seams and tearing. (pandemic to these trucks)
Check TSB 90-16-7
E3TZ 7K509 A for the small $15 kit
Thread Starter
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Senior User
Joined: Nov 2006
Posts: 294
Likes: 3
From: Northern New Mexico
You need the hydraulic clutch pedal assembly.
Mechanical clutches were found in the 351M, until 1983.
I would suggest installing the *small* firewall reinforcing bracket while the pedals are out to prevent popped seams and tearing. (pandemic to these trucks)
Check TSB 90-16-7
E3TZ 7K509 A for the small $15 kit
Mechanical clutches were found in the 351M, until 1983.
I would suggest installing the *small* firewall reinforcing bracket while the pedals are out to prevent popped seams and tearing. (pandemic to these trucks)
Check TSB 90-16-7
E3TZ 7K509 A for the small $15 kit
THanks for the tip. I will search for the bulletin.
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