dually 4x4 conversion
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Junior User
Joined: May 2002
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dually 4x4 conversion
I have a 2wd 1988 f350 12' rack dump. I found an 86 dually 4x4 for sale cheap. How difficult is it to swap the front axle and transfer to make it 4x4? I have a ttb front now. Haven't seen other truck yet so I can't comment on it. But as a concept is it doable?
Fleet Owner
Joined: May 2009
Posts: 21,437
Likes: 76
From: Gilbert, PA
By 86 4wd dually, you mean cab-n-chassis correct?
You are going to have to make sort sort of front leaf spring hanger behind the bumper.
You will have to transfer the front spring hangers from by the front mount to your truck.
You will also need a 4wd transmission(is your truck and donor truck the same engine? They NEED to be)
Are the gear ratios the same between the 2 trucks? if not you will have to swap the rear axle too
You are going to have to make sort sort of front leaf spring hanger behind the bumper.
You will have to transfer the front spring hangers from by the front mount to your truck.
You will also need a 4wd transmission(is your truck and donor truck the same engine? They NEED to be)
Are the gear ratios the same between the 2 trucks? if not you will have to swap the rear axle too
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Junior User
Joined: May 2002
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Tranny is the first problem. The 86 is a 6.9 diesel. my 88 is a modded 351. I know nothing about the 6.9. I thought the diesels had a different c6 than the small blocks. I thought the frames were the same between 2wd and 4wd. Could be wrong. I didn't know if you could swap front end components easily or not.
Fleet Owner
Joined: May 2009
Posts: 21,437
Likes: 76
From: Gilbert, PA
Tranny is the first problem. The 86 is a 6.9 diesel. my 88 is a modded 351. I know nothing about the 6.9. I thought the diesels had a different c6 than the small blocks. I thought the frames were the same between 2wd and 4wd. Could be wrong. I didn't know if you could swap front end components easily or not.
Trannys are different
86 has a 4 speed (T-19)
88 has C6
You would need small block bell housing to fir the small block. but why not just put a ZF5 in and be down(OD and better fuel milage)
Frames are different because you have coil springs
It depends what you call easy? Do you have torches, welder, drill, grinder, etc? and KNOW how to use them? If so then it is easy. If not, then no. It is not easy
Fleet Mechanic
Joined: Aug 2005
Posts: 1,277
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From: MD
That sums it up!
pedant
Joined: Jan 2008
Posts: 23,576
Likes: 38
From: EXTREME southwest CT
It's really overdrive.
Depending on which build, 0.76:1
.77 in diesels, I think.
Finding a Windsor bell 4x4 ZF seems to be the holy grail or something...
Depending on which build, 0.76:1
.77 in diesels, I think.
Finding a Windsor bell 4x4 ZF seems to be the holy grail or something...
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Junior User
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ah, So I'm not going to find one eh? So I should either not buy it or just use it as a plow truck until it rusts away.
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pedant
Joined: Jan 2008
Posts: 23,576
Likes: 38
From: EXTREME southwest CT
I didn't say you would never find one, just that they seem rare because of demand.
Some members here have been looking for good ones for a while.
I think a lot depends on your area.
If people don't find one locally shipping can really hurt.
Midwest trans wants $2360 plus shipping for a 4wd Windsor pattern. ($500 is core)
It IS the late model -s47 variant.
Whether you need the extra 50 ft lbs rating depends on how built your engine is and how hard you beat on it.
Some members here have been looking for good ones for a while.
I think a lot depends on your area.
If people don't find one locally shipping can really hurt.
Midwest trans wants $2360 plus shipping for a 4wd Windsor pattern. ($500 is core)
It IS the late model -s47 variant.
Whether you need the extra 50 ft lbs rating depends on how built your engine is and how hard you beat on it.
pedant
Joined: Jan 2008
Posts: 23,576
Likes: 38
From: EXTREME southwest CT
Swing by the CT chapter (and maybe the MA one too) and ask around.
I know CT chapter member Reamer has been looking for a 4x4 Windsor ZF for a while.
I know CT chapter member Reamer has been looking for a 4x4 Windsor ZF for a while.
Fleet Owner
Joined: May 2009
Posts: 21,437
Likes: 76
From: Gilbert, PA
I have 2 small block ZFs. Not that hard to find, just need to know where to look(3/4 and one tons that were stick)
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