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| 2004 to 2008 F-150 and Mark-LT 4.2L, 4.6L and 5.4L equipped F-150s and Mark-LTs. |
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#1
Mon, December 21st, 2009, 02:30 PM
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ring and pinion
Guys i wanna run 38" tires what is the best ratio i can go for ?
my truck is 2004 and the gear ratio is 3.73, well i want to know how many in inches is my diff ? cuz i wanted to buy superior brand and they asked me about the size . and what brand should i use ? any suggestions please ? 
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#2
Mon, December 21st, 2009, 02:57 PM
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If you have the 5.4L then you have a 9.75 rear end.
With 37's I would go with 4.88's definitely. And dont forget to do the gears on the front also (4wd only).
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#5
Mon, December 21st, 2009, 03:07 PM
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Quote:
 I was just looking for their name to post it...of course I couldn't remember where I wrote it down. And just to add to it....everyone I have talked to wouldn't use anything other than Yukon gears.
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#6
Mon, December 21st, 2009, 03:11 PM
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Here's the link to Randy's:
http://www.ringpinion.com/PartsList....SpotlightID=11
__________________
SENIOR MODERATOR--PTLA God doesn't have a Facebook but he's my friend. God doesn't have a twitter, but I follow him.
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#7
Mon, December 21st, 2009, 03:06 PM
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On the support page of PHP's website there is a gear calculator:http://dygytalworld.ehost-services13.../_Support.html
Do a search for Randy's ring and pinion. Probably the best quality and at the best prices. JMHO
__________________
SENIOR MODERATOR--PTLA God doesn't have a Facebook but he's my friend. God doesn't have a twitter, but I follow him.
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Flowmaster 40, PHP Gryphon, AS 2" kit
Hybrid Mode
