DODGE RAM FORUM - Ram Forums and Owners Club! - Dodge Truck Forum

DODGE RAM FORUM - Ram Forums and Owners Club! - Dodge Truck Forum (http://www.ramforumz.com/index.php)
-   2010 Dodge Ram Forum (http://www.ramforumz.com/forumdisplay.php?f=79)
-   -   Re-Gearing (http://www.ramforumz.com/showthread.php?t=118844)

nclonin 08-07-2012 12:56 PM

Re-Gearing
 
I have a 2010 ram with the V8 4.7 L on a 5" lift with 35" tires. Is the Lift and tires hard on this smaller engine? I have the stock gears and was thinking of re-gearing it, but do not know what to switch to or if it would even help. Any suggestions on what I should do?

TheSatinPumpkin 08-07-2012 01:16 PM

What is your stock ratio? You will get by but man oh man it is going to be a strain getting up to speed.

nclonin 08-07-2012 03:29 PM

Thanks for your reply. Yes it is a bit of a strain getting up to speed, but it does not drive too bad other than that. I am not sure on what the stock ratio is, what would you recommend I get and how much does this usually cost? I do quite a bit of highway driving and have been getting about 16 or 17. In town is pretty brutal though. Also do I have to buy a tuner to get my tires calculated in, my speedometer is about 10% off?

westxsrt10 08-09-2012 08:54 PM

You likely have 3.55's. The 4.10's should be about right, maybe 3.96's if you don't tow.

RyanJM 08-13-2012 08:49 PM

After finding out my 09 hemi came with 3.21's I just dropped it off today for 3.92's or whatever dodge used. I am only running 305/55/20's and it felt to slow especially when towing. I would look into a 4.10 with 35's maybe a better match.

westxsrt10 08-13-2012 10:27 PM

Quote:

Originally Posted by RyanJM (Post 864986)
After finding out my 09 hemi came with 3.21's I just dropped it off today for 3.92's or whatever dodge used. I am only running 305/55/20's and it felt to slow especially when towing. I would look into a 4.10 with 35's maybe a better match.

The 3.92 will be a great choice for a 33" tall tire. Be sure to break-in the new gears properly. I have 33" tire with 3.92 and it pulls my 8000lbs car hauler like a dream and gets 20 mpg hwy unloaded.

CHVYKLR 08-13-2012 10:45 PM

I'd get 4.56 gears to turn those 35s.

916Timmy 08-13-2012 11:06 PM

Quote:

Originally Posted by CHVYKLR (Post 865096)
I'd get 4.56 gears to turn those 35s.

Especially with the 4.7

TheSatinPumpkin 08-14-2012 11:36 AM

I used a guy based in Chandler to do my gear changes (4.10's, 4.88's and my current 4.56's) and from what i remember it was around $300 but dont quote me. He has does quite a few 9.25 corp rear differentials so he is very familiar in the process (Each install turn around time was about 4 hours.

He is also mobile so he can come to any location or to the comfort of your own home. (2 of the 3 installs was done at my house in SW Tucson)
His name is TJ and his number is 480-751-8065
Very cool guy.
A Programmer can take care adjusting your speedometer per entering your tire metrics.

Easy way to get your factory ratio is to request a build sheet per your VIN.
Here is the link where you can request the build sheet. From other members responses the turn around sounds quick.
http://www.dodge.com/wccsapp/universal/D/index.jsp?appStr=wccs&titleStr=Contact+Dodge&famil yStr=brand&franchise=D&actionURL=%2Fwccs%2Fbrand_f orms%2Fus%2Fwebform.jsp&promotion=null&category=U

Quote:

Originally Posted by nclonin (Post 860103)
Thanks for your reply. Yes it is a bit of a strain getting up to speed, but it does not drive too bad other than that. I am not sure on what the stock ratio is, what would you recommend I get and how much does this usually cost? I do quite a bit of highway driving and have been getting about 16 or 17. In town is pretty brutal though. Also do I have to buy a tuner to get my tires calculated in, my speedometer is about 10% off?


snrusnak 08-14-2012 02:09 PM

Like said above, with 35" tires, 5" lift, and a 4.7L I'd go with 4.56's. 4.10's at a minimum. Maybe even 4.88's but if you do a lot of highway probably not.

If you have 3.55's with 35" tires your probably at like 1500 rpm at 70mph, really lugging.

Stock is ~31" tires with 3.55 gearing(assuming the gearing). This is basically equal to ~35" tires with 4.10 gearing.


All times are GMT -4. The time now is 07:45 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
vB.Sponsors
= Copyright RamForumZ.com a Gigathreads.com Network Site =Ad Management by RedTyger