Gears
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Freshman User
Joined: Feb 2003
Posts: 25
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From: Kentucky
Gears
I have a 98 4.0L with 3.55 gears in it from the factory does anyone have a set of 3.73 in their 4.0L and if u do are they very hard on your motor and how high does it tach at 55 so I can compare mine tachs right at 2000 I would appreciate some help before I buy the gears..... 
Thanks !!!!!!!!
Livefast
Freshman User
Joined: Feb 2003
Posts: 29
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From: dallas area
the differences you,ll see going from 3.55s to 3.73s will be slight in almost all catagories...performance, mileage, etc. i don't think it would be worth the cost. i did a gear change (3.55s to4.10s) when i put the bigger tires on (also put a limited-slip in). regained performance and less stress on the tranny. ford uses several gears sizes...your engine will be fine.
Last edited by gbgary; Oct 2, 2004 at 01:32 PM.
Junior User
Joined: Jul 2003
Posts: 88
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I have 3.73s in my 98 4.0 with the stock tires it was great good power mpg. Now I have 265/75/16s it sucks power mpg went way down. I want 4.33s in it does anyone know how much that would cost? O forgot to add I have a locker to works like a champ!!
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