Ford 83-94 6.9 and 7.3L General Discussion of 83-94 6.9 and 7.3 Liter Ford Diesels

Gears in the rear

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  #31  
Old 02-21-2014, 11:33 AM
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I'm dreading going to a state competition for skills usa, so I'd believe it. Report back with what he says
 
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hobbieman (02-24-2014)
  #32  
Old 02-21-2014, 07:36 PM
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Dortiz .. whells are for sale till gone .. first post was here ...

And on the gear swap ... your rear diff is a full floater, and you will need a ring and pinion and a master install/bearing kit ... not for the back yard guys ... need to make sure you get the pinion done correct or you will be buying and doing it all again real soon ...
 
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  #33  
Old 02-21-2014, 07:38 PM
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Semi float
 
  #34  
Old 02-23-2014, 12:47 AM
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What do y'all think my gearing is, mine runs about 2100RPM's @ 70 MPH. With 265/75R16's.
 
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  #35  
Old 02-23-2014, 09:01 AM
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Probably 4.10s
 
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  #36  
Old 02-23-2014, 03:55 PM
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3.55s I'm thinkn. u have same scenario as me unless 4.10 isn't far off

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  #37  
Old 02-23-2014, 04:34 PM
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What rear end ratio is in my Ford , do I have positraction? - Drivetrain.com

Look on the door sticker in your truck, at the bottom it will list axle codes, apparently mine was 39 so looks like I have 3.55
 
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  #38  
Old 02-24-2014, 03:32 AM
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Ok, thank you, I'll check my door code.
 
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  #39  
Old 02-24-2014, 06:57 AM
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Me 2
 
  #40  
Old 02-24-2014, 10:01 PM
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I did some searching and I found a chart that says I have 3.55's. The ZF must have some major gears to make 1st gear so low. Here's a link
What rear end ratio is in my Ford , do I have positraction? - Drivetrain.com
 


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