4.10 gears. Any put them in yet? - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep Grand Cherokee & Commander Forums > WK Grand Cherokee & XK Commander Forum > 4.10 gears. Any put them in yet?

Stainless Steel Door Hinge PinsPoly Door Hinge BushingsEnd of Summer Sale, 20% OFF!

Reply
Unread 03-27-2014, 03:17 PM   #1
05SilVer
Registered User
2005 WK 
 
Join Date: Sep 2013
Location: Poway, CA
Posts: 90
4.10 gears. Any put them in yet?

4.10 gears. Any put them in yet? I am thinking about doing it. I know the rear will be easy to do but not sure about the front. And if you have done it how do you like it? I have a hypertech tuner so I can tune it for the the gear change.

__________________
Zak

05 Grand cherokee limited
OME 2" lift.
265/70r17
1.5 wheel spacers
Max Energy Hypertech
05SilVer is offline   Reply With Quote
Unread 03-27-2014, 03:26 PM   #2
Jeepforthewin
Lucky Charms!
 
Jeepforthewin's Avatar
2005 WK 
 
Join Date: Jan 2013
Location: Jacksonville, Fl
Posts: 2,075
There was a thread about this not too long ago. Bunch of people have them just not installed yet, hoping that has changed! Everyone go buy 4.10's, I need them to make 4.56's
__________________
2010 JKU - Stock for now
2005 WK - 6" lift, 35" BFG's, a lot more (SOLD)
Jeepforthewin is offline   Reply With Quote
Unread 03-27-2014, 03:45 PM   #3
05SilVer
Registered User
2005 WK 
 
Join Date: Sep 2013
Location: Poway, CA
Posts: 90
Quote:
Originally Posted by Jeepforthewin
There was a thread about this not too long ago. Bunch of people have them just not installed yet, hoping that has changed! Everyone go buy 4.10's, I need them to make 4.56's
Okay thanks. I did a search and didt see any thing.
__________________
Zak

05 Grand cherokee limited
OME 2" lift.
265/70r17
1.5 wheel spacers
Max Energy Hypertech
05SilVer is offline   Reply With Quote
Unread 03-27-2014, 06:35 PM   #4
biggn235
DAS Man
 
biggn235's Avatar
1994 XJ Cherokee 
 
Join Date: Aug 2009
Location: Hotels, USA
Posts: 1,435
With most of us running 3.73s I'm surprised they didn't go straight to making 4.56. To me it isn't worth changing from 3.73 to 4.10, the V6 guys will benefit more for sure.

Anyone know if they are limited to a certain depth because of the front carrier?
__________________
94XJ - Build Thread

Past - 95YJ 99XJ 98XJ 05WK
biggn235 is offline   Reply With Quote
Unread 03-27-2014, 07:06 PM   #5
JeepN4KC
Keep on Jeepin on........
 
JeepN4KC's Avatar
 
Join Date: Jul 2011
Location: Blue Springs, MO
Posts: 5,669
Quote:
Originally Posted by biggn235 View Post
With most of us running 3.73s I'm surprised they didn't go straight to making 4.56. To me it isn't worth changing from 3.73 to 4.10, the V6 guys will benefit more for sure.

Anyone know if they are limited to a certain depth because of the front carrier?

This is a good question. I know on the D30 in my XJ, for example, the breakover on gears is 4.10s - 4.56 requires a different carrier.

It isn't so much a limiting factor, just something else that would have to be swapped - assuming the housing would accept a different carrier........

I tend to agree with your point regarding the jump from 3.73 to 4.10...........deeper gears would be more beneficial for most the WKers that are even looking to regear being as many are running 33s or more.

Now if a 4:1 tcase could be paired with 4.10s on a WK that would be awesome.
__________________
~Mike~

My Build Thread WK
My Other Build Thread XJ
'01 XJ with some stuff
Sept 2013 Cherokee of the Month
'07 WK with some other stuff
~RED WK CLUB #7~
'11 KK with mostly stock stuff
'06WK our first Jeep with stock stuff - totalled and gone
JeepN4KC is offline   Reply With Quote
Unread 03-27-2014, 07:38 PM   #6
biggn235
DAS Man
 
biggn235's Avatar
1994 XJ Cherokee 
 
Join Date: Aug 2009
Location: Hotels, USA
Posts: 1,435
Quote:
Originally Posted by JeepN4KC View Post
Now if a 4:1 tcase could be paired with 4.10s on a WK that would be awesome.
I can hear the CVs popping now haha
__________________
94XJ - Build Thread

Past - 95YJ 99XJ 98XJ 05WK
biggn235 is offline   Reply With Quote
Unread 03-28-2014, 03:38 AM   #7
jeepin_in_a_wk
Registered User
2007 WK 
 
Join Date: Feb 2014
Location: colorado springs, colorado
Posts: 102
im wondering the same, how is it putting em in the front. i have the 3.7 and all the nice trails have mean hills that i cant do without better gears. also how much will my mpg suffer?
jeepin_in_a_wk is offline   Reply With Quote
Unread 03-28-2014, 06:28 AM   #8
JeepN4KC
Keep on Jeepin on........
 
JeepN4KC's Avatar
 
Join Date: Jul 2011
Location: Blue Springs, MO
Posts: 5,669
Quote:
Originally Posted by jeepin_in_a_wk View Post
im wondering the same, how is it putting em in the front. i have the 3.7 and all the nice trails have mean hills that i cant do without better gears. also how much will my mpg suffer?
Having no 4lo is going to hurt your ability to tackle mean hills. No way I'd bother regearing w/o 4lo.
__________________
~Mike~

My Build Thread WK
My Other Build Thread XJ
'01 XJ with some stuff
Sept 2013 Cherokee of the Month
'07 WK with some other stuff
~RED WK CLUB #7~
'11 KK with mostly stock stuff
'06WK our first Jeep with stock stuff - totalled and gone
JeepN4KC is offline   Reply With Quote
Unread 03-28-2014, 07:00 AM   #9
ryann04
Registered User
2008 WK 
 
Join Date: Feb 2013
Location: Edmonton, AB
Posts: 315
Don't quote me on this, but I think the Diesel JGC's would fair just fine with 35"-37" tires without the re-gearing.

I am rolling around on 33" tires, went 4x4ing to a local off-road park the other weekend, and I had more torque than I would ever have needed...

Plus it revvs high already on the highway, I could only imagine what these other gears would do.. lol
__________________
2008 - Jeep Grand Cherokee - 3.0L CRD - Quadra Drive II - GDE Hot-Tune - OME HD Lift Kit - OEM Full Steel Skids
-----------------------------------------------------------------
Blue WK Club Member #42 // DIESEL FTW !!!! -Ryan
ryann04 is offline   Reply With Quote
Unread 03-28-2014, 08:06 AM   #10
Jeepforthewin
Lucky Charms!
 
Jeepforthewin's Avatar
2005 WK 
 
Join Date: Jan 2013
Location: Jacksonville, Fl
Posts: 2,075
The CRD and HEMI come with 3.73 (others may but can't remember lol), the HEMI power isn't too bad with 35's. You can tell its a little sluggish but I am used to it now. For us 4.56's would give us a more stock feel than what we have now. It isn't to bad but it could be better. I know that our carriers could handle 4.56's but Nitro Gear and Axle stated that they will not make them until the 4.10's sell good. Hopefully alot of the SRT guys are picking up the 4.10's.
__________________
2010 JKU - Stock for now
2005 WK - 6" lift, 35" BFG's, a lot more (SOLD)
Jeepforthewin is offline   Reply With Quote
Unread 03-28-2014, 09:13 AM   #11
05SilVer
Registered User
2005 WK 
 
Join Date: Sep 2013
Location: Poway, CA
Posts: 90
I have 32'' on my jeep right now and the 4.7 mortor and it's not a fan of big hills. Even with the hypermax tuner. So I was thinking the gears wood help. But sounds like I should wait till the 4.56's ones come out.
__________________
Zak

05 Grand cherokee limited
OME 2" lift.
265/70r17
1.5 wheel spacers
Max Energy Hypertech
05SilVer is offline   Reply With Quote
Unread 03-28-2014, 09:27 AM   #12
ryann04
Registered User
2008 WK 
 
Join Date: Feb 2013
Location: Edmonton, AB
Posts: 315
How would one find out the revs per kmh or mph with the gear upgrades on a 3.0l CRD? For the matter, the rest of the engine sizes.

stock vs 4.10 vs 4.56

Yes there will be variables per tire size, but what if we base-lined it off stock tires. Or even a %?

so 3.73:1 to 4.10:1 = 0.37 difference.

I used a gear ratio rpm calculator I found on the internet. According to it;

@ 60mph with 33" tires and 3.73 gears, 1595 RPM on a auto tranny with overdrive
@ 60mph with 33" tires and 4.10 gears, 1753 RPM on a auto tranny with overdrive

(not sure on what math they used to get these answers)

But if they are even roughly correct, the difference should only be 200 RPM?

Also what kind of torque/Horsepower are we looking to achieve from this gear swap?

Can anyone with experience on this subject chime in and clarify? This way we can mathematically decide which options are worth while and why.
__________________
2008 - Jeep Grand Cherokee - 3.0L CRD - Quadra Drive II - GDE Hot-Tune - OME HD Lift Kit - OEM Full Steel Skids
-----------------------------------------------------------------
Blue WK Club Member #42 // DIESEL FTW !!!! -Ryan
ryann04 is offline   Reply With Quote
Unread 03-28-2014, 10:18 AM   #13
sk1er18
Registered User
2007 XK Commander 
 
Join Date: Mar 2007
Location: Way out there
Posts: 1,470
Quote:
Originally Posted by 05SilVer View Post
But sounds like I should wait till the 4.56's ones come out.
From what I remember hearing not too long ago, 4.56s arent in the plans at all. So I wouldn't hold your breath on that one.
__________________
-Matt
sk1er18 is offline   Reply With Quote
Unread 03-28-2014, 12:27 PM   #14
yzjwk
Registered User
2005 WK 
 
Join Date: Apr 2011
Location: Lac du Bonnet, manitoba, Can
Posts: 1,101
Quote:
Originally Posted by ryann04 View Post
How would one find out the revs per kmh or mph with the gear upgrades on a 3.0l CRD? For the matter, the rest of the engine sizes.

stock vs 4.10 vs 4.56

Yes there will be variables per tire size, but what if we base-lined it off stock tires. Or even a %?

so 3.73:1 to 4.10:1 = 0.37 difference.

I used a gear ratio rpm calculator I found on the internet. According to it;

@ 60mph with 33" tires and 3.73 gears, 1595 RPM on a auto tranny with overdrive
@ 60mph with 33" tires and 4.10 gears, 1753 RPM on a auto tranny with overdrive

(not sure on what math they used to get these answers)

But if they are even roughly correct, the difference should only be 200 RPM?

Also what kind of torque/Horsepower are we looking to achieve from this gear swap?

Can anyone with experience on this subject chime in and clarify? This way we can mathematically decide which options are worth while and why.
Yes 200 rpm .Big difference with gas engine , verry little to CRD because of how each make power as i'm sure your aware .
Math is simple .read formula at bottom of converter http://www.powerblocktv.com/resources/


The ONLY reason to lower gears is to raise the final drive rpm back to stock to compensate for larger tires (unless your racing which is different). The CRD's Nag 1 has a final od of 0.83 , so at 60mph on stock 29.5 " tires and 3.73 gears your rpm should be 2116rpm . way too high IMO for a crd . If i had one (and a QT2 no ELSDs) i would take the 3.07 gears out of the wk 3.7L . That would lower your rpm to 1742 rpm . Then you could stick a set of 32s on and you would sit at 1600 . Perfect for a crd IMO .

The hemi/4.7's .067 final od brings the same set up rpms down to 1708rpm which is about right for the gas engine . but put 33's on and all of a sudden you drop to 1527 rpm which would be o.k for the high way , but getting it there would start to be a bit of a strain because now even starting from a red light you have to be on the throttle more to make up for the 200 rpm loss . BUT stick a set of 4.10s on and now your final drive is 1678 rpm .. ALmost perfectly back to stock 1708rpm from the red light to the highway .
__________________
Proud owner : 05 WK Ltd 5.7 HEMI
90 YJ Islander 4.2 Cam'd & Decked
94 ZJ Ltd 5.2
00 WJ 4.0
yzjwk is offline   Reply With Quote
Unread 03-28-2014, 04:52 PM   #15
ryann04
Registered User
2008 WK 
 
Join Date: Feb 2013
Location: Edmonton, AB
Posts: 315
Quote:
Originally Posted by yzjwk View Post
Yes 200 rpm .Big difference with gas engine , verry little to CRD because of how each make power as i'm sure your aware .
Math is simple .read formula at bottom of converter http://www.powerblocktv.com/resources/


The ONLY reason to lower gears is to raise the final drive rpm back to stock to compensate for larger tires (unless your racing which is different). The CRD's Nag 1 has a final od of 0.83 , so at 60mph on stock 29.5 " tires and 3.73 gears your rpm should be 2116rpm . way too high IMO for a crd . If i had one (and a QT2 no ELSDs) i would take the 3.07 gears out of the wk 3.7L . That would lower your rpm to 1742 rpm . Then you could stick a set of 32s on and you would sit at 1600 . Perfect for a crd IMO .

The hemi/4.7's .067 final od brings the same set up rpms down to 1708rpm which is about right for the gas engine . but put 33's on and all of a sudden you drop to 1527 rpm which would be o.k for the high way , but getting it there would start to be a bit of a strain because now even starting from a red light you have to be on the throttle more to make up for the 200 rpm loss . BUT stick a set of 4.10s on and now your final drive is 1678 rpm .. ALmost perfectly back to stock 1708rpm from the red light to the highway .
Great explanation and thanks for the link.

I think I'll just stay stock with my CRD. But as you said, this would be huge for the 4.7L and the Hemi.
__________________
2008 - Jeep Grand Cherokee - 3.0L CRD - Quadra Drive II - GDE Hot-Tune - OME HD Lift Kit - OEM Full Steel Skids
-----------------------------------------------------------------
Blue WK Club Member #42 // DIESEL FTW !!!! -Ryan
ryann04 is offline   Reply With Quote




Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.