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 ?

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).

OK .. thanx but you know i don`t know what should i buy ?
ring and pinion only ?
and what brand ?

Give Randy's Ring and pinion a call, they will hook you up!

Yukon Gear is what we use.

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

:2thumbs: 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.

Here's the link to Randy's:
http://www.ringpinion.com/PartsList....SpotlightID=11

and what am looking for is only ring and pinion ?
right guys ?

You are looking for install kits for both front and rear. Also you are looking for ring and pinions for front and rear.

CALL THEM/
EMAIL THEM
They are the experts and they may need some info like your VIN and/or axle tag numbers.
Phone # and contact info is in the link I provided.

thanx a lot guys i emailed them and will be in touch .. Thanx