Differences between ZFs
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Postmaster
Joined: Mar 2008
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From: Sweet Home, OR
Differences between ZFs
What are the differences between ZF42 ZF47 etc?
Which is best/strongest and what years did they come in?
Don't really care about gear ratio differences but others might if you want to post that info.
THANKS GUYS!
Which is best/strongest and what years did they come in?
Don't really care about gear ratio differences but others might if you want to post that info.
THANKS GUYS!
Post Fiend
Joined: Nov 2004
Posts: 5,638
Likes: 1
From: Manitoba
The ZF5 42 is available in both wide and close ratio versions. The wide ratio is available in all Fseries vehicles over 8500LBS GVW all engines except Fseries Super Duty Commercial stripped chassis equipped with a diesel engine. The close ratio version is only available in F series vehicles equiped with the 7.3 diesel engine and GVW over 8500LBS.
Ratios
Close 4.14 2.37 1.42 1.0 .077 REV 3.79 (DIESEL)
Wide 5.72 2.94 1.61 1.0 .076 REV 5.24 (GAS)
Lots of info available... I googled ZF5 47
Ratios
Close 4.14 2.37 1.42 1.0 .077 REV 3.79 (DIESEL)
Wide 5.72 2.94 1.61 1.0 .076 REV 5.24 (GAS)
Lots of info available... I googled ZF5 47
Post Fiend
Joined: Nov 2003
Posts: 21,285
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From: Nutter Fort, WV
The S47 is the stronger of the two.
The max torque rating is the difference.
S42 is is rated at 600 nm with thew 4.65 low gear ratio and 580 nm with the 5.72 low gear ratio.
S47 is rated at 640 nm across the board for all gear ratios.
The max torque rating is the difference.
S42 is is rated at 600 nm with thew 4.65 low gear ratio and 580 nm with the 5.72 low gear ratio.
S47 is rated at 640 nm across the board for all gear ratios.
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Postmaster
Joined: Mar 2008
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From: Sweet Home, OR
Doesn't NM mean newton-meters or something? You're talking above my head on that but it doesn't really matter as all I care about is strength and this answers my question.
I was helping my ex-buisness partner put a new front ring and pinion in his M-B Galendewagen and the pinion nut needed some specific "newtons" of torque. We gave each other a WTF look and decided the best course of action was to get help from someone who new what the heck a "newton" is, my guess was it must have something to do with gravity and apples.
So we called a friend of mine that is an experimental machinist for the Beureau of Mines, he tried in vain to explain the conversion of newtons to foot-pounds to us while we gave HIM the now common WTF look. Finally he said "get it as tight as you can with about a two foot cheater bar, and then get it a little bit tighter." That we could understand!
I was helping my ex-buisness partner put a new front ring and pinion in his M-B Galendewagen and the pinion nut needed some specific "newtons" of torque. We gave each other a WTF look and decided the best course of action was to get help from someone who new what the heck a "newton" is, my guess was it must have something to do with gravity and apples.
So we called a friend of mine that is an experimental machinist for the Beureau of Mines, he tried in vain to explain the conversion of newtons to foot-pounds to us while we gave HIM the now common WTF look. Finally he said "get it as tight as you can with about a two foot cheater bar, and then get it a little bit tighter." That we could understand!
Post Fiend
Joined: Nov 2004
Posts: 5,638
Likes: 1
From: Manitoba
Torque is defined as: The measure of the force applied to produce rotational motion (usually measured in foot-pounds). Torque is determined by multiplying the applied force by the distance from the pivot point to the point where the force is applied.
In the English system, torque is measured in “foot-pounds” or “inch-pounds”.
In the Metric system, torque is measured in “Newton-meters”.
8.851 inch-pounds = 1 Newton-meter
1 foot-pound = 12 inch-pounds
16 ounce-inches = 1 inch-pound
1 Newton = 1 kilogram-meter per second squared
Torque = Force x Moment Arm
http://www.convertunits.com/from/new...to/foot+pounds
In the English system, torque is measured in “foot-pounds” or “inch-pounds”.
In the Metric system, torque is measured in “Newton-meters”.
8.851 inch-pounds = 1 Newton-meter
1 foot-pound = 12 inch-pounds
16 ounce-inches = 1 inch-pound
1 Newton = 1 kilogram-meter per second squared
Torque = Force x Moment Arm
http://www.convertunits.com/from/new...to/foot+pounds
Postmaster
Joined: Mar 2002
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From: Coal Region
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Postmaster
Joined: Mar 2008
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From: Sweet Home, OR
Thanks PLC7.3,
Now that I have it on paper I can make some sense out of it.
Also, forgot to ask, did the two different ZFs run concurrently or were there some years that only had one or the other?
Thanks again.
Now that I have it on paper I can make some sense out of it.
Also, forgot to ask, did the two different ZFs run concurrently or were there some years that only had one or the other?
Thanks again.
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