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Author
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Topic: ZF 5sp interchange w/newprocess
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zex85gt
Journeyman Posts: 6
From: Vevay,IN
Registered: Apr 2004
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posted 04-26-2004 02:13 AM
   
I've got a 83 F250 4X4 XLT 351W extcab. I'm building a 408W to go in it and need an overdrive. Will a ZF 5sp work in place of the newprocess or would I be better off using a USGear overdrive? I would rather use the ZF 5sp. [cheaper]
Ricky Lynn
Vevay,IN
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MLariviere
Moderator Posts: 3711
From: Biddeford,Me.USA
Registered: May 99
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posted 04-26-2004 09:38 PM
Is that a New Process 435? If it is,it's the stronger trans. The ZF would work,but I think you would end up tearing it up.
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zex85gt
Journeyman Posts: 6
From: Vevay,IN
Registered: Apr 2004
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posted 04-26-2004 10:30 PM
how can you tell if it's a 435. what would you do for an overdrive?
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zex85gt
Journeyman Posts: 6
From: Vevay,IN
Registered: Apr 2004
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posted 04-26-2004 11:04 PM
well I dug out my motors manual and crawed under my truck and it's a newprocess model 445 is that good or bad
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MLariviere
Moderator Posts: 3711
From: Biddeford,Me.USA
Registered: May 99
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posted 04-26-2004 11:52 PM
Quite honestly I'm not in the know with standard transmissions. The 435 has a granny low,and the heavier trucks use them. Not sure what the 445 is. What you should look for are the sizes of the input shafts. that is how these are usually judged. Your application will tell you what you need. Are you pulling or hauling heavy loads?
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zex85gt
Journeyman Posts: 6
From: Vevay,IN
Registered: Apr 2004
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posted 04-27-2004 12:09 AM
my 445 has a granny 1st gear. the most I will ever tow is 7000# usually only 4000# [16'x 7' trailer and race car 2800#] I want the overdrive for interstate use.
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zex85gt
Journeyman Posts: 6
From: Vevay,IN
Registered: Apr 2004
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posted 04-27-2004 12:32 AM
the transmission I've been looking at is on ebay. ZF S5-42 or S5-47 HD 5sp manual 2WD-4WD for F250,350,450 are these weak?
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SteveLaRiviere
Administrator Posts: 38184
From: Saco, Maine
Registered: May 99
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posted 04-27-2004 08:40 PM
I wouldn't think so, if they used them on the F350 and F450.------------------
'70 Mustang Mach 1 351C 4V/FMX/3.25 Open
'70 Mustang Convertible 250 I6/3 speed/2.79 Open
'72 Mustang Sprint Hardtop 351C 4V/FMX/4.30 Trac Loc
'94 F-150 XL 5.8L/E4OD/3.55 Limited Slip
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zex85gt
Journeyman Posts: 6
From: Vevay,IN
Registered: Apr 2004
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posted 04-27-2004 09:57 PM
now if I can figure out the dimenions and if my manual clutch will work. With my 4.11 gears I will never get better gas milage. That's why I'm going with an over drive and more cubic in. with low end torque.
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