Gear Ratio as it pertains to axle swap

ecksjay · 11-03-2007, 03:28 PM

So i just figured out by the tag on my pig that I have 3.55 gears (i am sad cuz up until now i thought i had 3.73)

I am entertaining the idea of finding a 44 to swap for my 35. All of the 44s I have found have a 3.54 ratio. I understand that you need to match the front and rear ratios but for all of the research that I have done, it seems that you can't re-gear a 35 to 3.54 and cant re-gear a 44 to 3.55. Perhaps I haven't done enough hunting.

I feel like I may get flamed for this question, but I'll ask anyway - Are these a close enough match?

nicolas-eric · 11-03-2007, 03:36 PM

the 3.55 and 3.54 ratios will work together.
itÂ´s the same with the 4.09 in the D44 and the 4.10 in the D30.

if you want some bigger tires in the future think about buying a 4.10 D44. on that way you only have to regear the front D30.

AzTJ · 11-03-2007, 04:13 PM

Nico is right - You'd run into issues like that especially if you were swapping in a Ford 8.8. They are one number off(4.56 vs 4.55) and they work fine.

sgnellett · 11-03-2007, 04:24 PM

Since he brought it up, I'm pretty sure it has been mentioned on here before, but I can't find it right now, anybody know what other vehicles came w/ 44's under 'em? Seems to me there was a Japanese SUV of some sort that had 'em stock, ring any bells?

rketr · 11-03-2007, 05:16 PM

Quote:

Originally Posted by nicolas-eric

the 3.55 and 3.54 ratios will work together.
itÂ´s the same with the 4.09 in the D44 and the 4.10 in the D30.

if you want some bigger tires in the future think about buying a 4.10 D44. on that way you only have to regear the front D30.

^^x2^^

Not to mention, the only time both gear sets come into play is when you are in 4wd. Your 30 up front will be spinning while driving, but, when in 2wd, is disconnected in your transfer case.

As an example, I've put just over 30K miles on my setup with 4.10 on one side and 4.11 on the other (I forget which has which). No problems to date.

AzTJ · 11-03-2007, 06:31 PM

Quote:

Originally Posted by sgnellett

Since he brought it up, I'm pretty sure it has been mentioned on here before, but I can't find it right now, anybody know what other vehicles came w/ 44's under 'em? Seems to me there was a Japanese SUV of some sort that had 'em stock, ring any bells?

Isuzu Amigo/Trooper has a leaf sprung D44, 6-5.5 wheel pattern. If you have a YJ or XJ, it might be a worthy upgrade.

**4Jeepn** · 11-03-2007, 06:34 PM

Honda passport and Isuzu rodeo had 44's...as well I think the trooper used..a Gm12 bolt???

AzTJ · 11-03-2007, 06:44 PM

Isuzu Corporate 12-bolt in the older Amigos, like 88-93(?).

All of which are a 6-bolt pattern.

TeeJay · 11-03-2007, 06:49 PM

I've heard a lot of chatter about the 8.8 lately. How good is it and how hard would that swap be for me if I pulled one from a wrecked exploder and rebuilt it with a locker and 3.73's? Is it a higher pinion? Would I be better off with that or a D44 from a Rubi that's going to 60's?

I'm gonna google this one right now, but feel free to answer it for google: how much After market support does the 8.8 have?

11-03-2007, 03:28 PM	#1
ecksjay Jeeper Join Date: Oct 2007 Posts: 25	Gear Ratio as it pertains to axle swap So i just figured out by the tag on my pig that I have 3.55 gears (i am sad cuz up until now i thought i had 3.73) I am entertaining the idea of finding a 44 to swap for my 35. All of the 44s I have found have a 3.54 ratio. I understand that you need to match the front and rear ratios but for all of the research that I have done, it seems that you can't re-gear a 35 to 3.54 and cant re-gear a 44 to 3.55. Perhaps I haven't done enough hunting. I feel like I may get flamed for this question, but I'll ask anyway - Are these a close enough match? __________________ 2K1 Patriot Blue Upcountry Limited XJ - 3" higher, 265/75/16 BFG ATs, JKS Discos, shovel, Hella 500 lights, Optima Red Top, Dynomax Super Turbo, JCR Stage 4 front bumper, 3.55 30/35 with LSD rear Proud member of the Heated-Seat XJ club

11-03-2007, 03:36 PM	#2
nicolas-eric Jeeper Join Date: Jan 2007 Location: Hamburg, Germany Posts: 5,460	the 3.55 and 3.54 ratios will work together. itÂ´s the same with the 4.09 in the D44 and the 4.10 in the D30. if you want some bigger tires in the future think about buying a 4.10 D44. on that way you only have to regear the front D30. __________________ Runicon Pics

11-03-2007, 04:13 PM	#3
AzTJ Jeeper Join Date: Dec 2006 Location: Payson, AZ Posts: 7,396	Nico is right - You'd run into issues like that especially if you were swapping in a Ford 8.8. They are one number off(4.56 vs 4.55) and they work fine. __________________ Grand Canyon State Renegade

11-03-2007, 06:34 PM	#7
4Jeepn IITYWTMWYBMAB ::WF Moderator:: Join Date: Apr 2005 Location: Florence, KY Posts: 3,772	Honda passport and Isuzu rodeo had 44's...as well I think the trooper used..a Gm12 bolt??? __________________ 79968500019700979397 97 5.2L Have you filled up your V8 today?

11-03-2007, 06:44 PM	#8
AzTJ Jeeper Join Date: Dec 2006 Location: Payson, AZ Posts: 7,396	Isuzu Corporate 12-bolt in the older Amigos, like 88-93(?). All of which are a 6-bolt pattern. __________________ Grand Canyon State Renegade Last edited by AzTJ; 11-03-2007 at 06:48 PM.

11-03-2007, 06:49 PM	#9
TeeJay Jeeper Join Date: Sep 2007 Posts: 583	I've heard a lot of chatter about the 8.8 lately. How good is it and how hard would that swap be for me if I pulled one from a wrecked exploder and rebuilt it with a locker and 3.73's? Is it a higher pinion? Would I be better off with that or a D44 from a Rubi that's going to 60's? I'm gonna google this one right now, but feel free to answer it for google: how much After market support does the 8.8 have? __________________ Jeep: Pioneered by a war, popularized by AMC, revived by Chrysler, jacked by some Germans, and copied by all.

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