I want to regear my truck soon due to losing power/mpg, but im not sure what to get...would i be better with 4.56s?

 

Wirelessly posted

You'll loose a **** ton on 4.56

 

lol thats what i figured. How much did you lose when you went to 4.56s?

 

Wait what? Lose power going to a lower gear? With 33's the 4.56's will put you close to stock gearing.

 

The power would be ok,but what about the mpg? Now im confused...

 

what gears do you currently have?

 

4.56's are ideal with 33's. youll probably gain a little bit in mileage too.

 

3.73s with the stock 7.5
Good im working on trying to get my mpg back. Im picking up some seafoam next week probably. Then gears and UD pulleys when i get the money lol.

 

4.10s wouldnt be a bad way to go either but 4.56s would be better...might have to do a rear end swap though...idk if you can regear a 7.5

 

You can i found the gears for the rear end earlier. Made by G2 or something like that lol

 

learn something new every day

 

Wirelessly posted

With 4.56 I got. 13 all around. On the highway at 65mph I was at 4000rpm.

I'm assuming you have 3.73s. If your on 33s 4.10 is plenty

 

lol here's something for me to learn...do i have a dana35 front end? never really looked or thought about it

 

Wirelessly posted

98 I lost mpg not power

 

There is no way you run 4000 RPM at 65 MPH with 4.56's. I run 2700 RPM at 70 MPH with my 4.56's, exactly the same RPM I ran at that speed with the stock 4.10's. The OP's truck is a 3.slow so it needs all the help it can get and 4.56's will do the trick. An under geared truck means the engine has to work that much harder to keep momentum which uses more gas. Lugging along at the lowest RPM possible isnt always the best thing for mileage.

 

This thread is full of bad info from certain people. 4.56's will be perfect. Listen to Patrick as he has that set up and do a search if you don't believe him or I.

 

Wirelessly posted

I reved at 4k on 31s

 

Dave's running 31's tho i can understand him at 4000 RPM

Thanks for help man, im on 33s to but im in the 3.slow lol so ill be at about 2500 RPM at 70 MPH?

 

Agreed, lots of bad crappy info here.

If you are regearing, only do it once. 33's, and the 3.0L with 4.56's will be a MUCH better choice than 4.10's. Your mileage should even pick up a bit too.

The 3.0L is rev happy anyway, a few extra is nothing to worry about and will hurt your mileage way less than if you went with 4,10s (which are too steep still).

4.88's would actually be an even better choice than 4.56's.....the 3.0L needs all the gearing it can get. 4.56's for 33's on the 4.0L is actually a bit much, but on the 3.0L its only adequate. Most charts will suggest 4.88's for the 3.slow.

DO NOT FEAR THe RPM! Your 3.0L will thank you later..

See here for some good info:

http://therangerstation.com/forums/showthread.php?t=15

The reason most people who posted LOST mileage they say is not because they went with 4.10's or 4.56's, its because they DIDN"T go with 4.88's. With 33's and 4.10's or 4.56's, the motor is still being overworked....

And OP, you have the standard cut, low pinion IFS D35. It came with the torsion bar setup in 1998. 93-97 had the TTB high pinion reverse cut rotation D35 radius arm setup.

 

That link helps alot lol

 

Lol 4.56s on 31s is a big fail. Unless you do lots of mud boggin and rock crawlin. Everyday.

 

I'm not sure where you guys are getting the 4000rpm number @ 65mph. This can't be. The only way it could is if you were running 5.71's. I know you weren't sooo....exahheration much? Me thinks yes.

Crusing RPM @ 65mph for 31's & 4.10's/4.56's will be around 2900/3220 respectively with OD OFF. Those are typical RPM's, and will be 15-30% lower with OD on. Normal operating RPM's.

Look here: and 'splain yourself:

http://www.therangerstation.com/tech...tirechart.html