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Unread 11-25-2014, 09:12 PM   #1
Dmarkowski
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Dana 44 regear

Hi all,

Suggestions on a rear end regear? 4.83 or 4.54 ? Have a 00 TJ 4.0 5 Speed with 33s. Looking to go 35s eventually. I do both highway and city driving. Can I just replace ring and pinion or do I have to jump into the carrier?

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Unread 11-25-2014, 09:25 PM   #2
NHfireLJ
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what gearing do you currently have? Many run 35's w 4.10 gearing on the 4.0 with no issues...

If are not aware.... Swapping gears isn't as easy as pulling out the old and installing new.... It requires careful set up... not saying it can't be done by a novice but really should be done by an experienced tech... Can cost anywhere from $500- $1000 depending on the shop...
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Unread 11-25-2014, 09:27 PM   #3
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Quote:
Originally Posted by Dmarkowski View Post
Hi all,

Suggestions on a rear end regear? 4.83 or 4.54 ? Have a 00 TJ 4.0 5 Speed with 33s. Looking to go 35s eventually. I do both highway and city driving. Can I just replace ring and pinion or do I have to jump into the carrier?
You are aware you need to re-gear BOTH axles if you do regear....?
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Unread 11-29-2014, 09:41 AM   #4
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I've got 4.0 and 5 spd and just regeared to 4.56. At first I had 35's and it was fine. I just installed 33's and it's fine. With 35's @ 65, I'm running around 2400 RPM (+/-) and with the 33's I'm around 2500 RPM (+/-). I'm running 15-16 mpg (75% hwy @ 65 mph) on both set-ups.


I came up from 3.73's, so I had to replace the carrier in the D44.
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Unread 11-29-2014, 10:00 AM   #5
Wheelin98TJ
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The D44 carrier break is 3.73/3.92.

Whether a carrier change is needed depends on what your current ratio is.

If you have the likely 3.73 ratio, you'll need the change carriers in order to gear to a deeper ratio (4.56, 4.88, etc.).

Or your other option is to keep your existing carrier and use a thick cut gear set.

Since you are planning on 35s, I think 4.88 is the right ratio for you.
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Unread 11-29-2014, 11:20 AM   #6
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If you live in the mountains I'd go 4.56 or 4.88. You'll need a deeper gear for some of those grades.
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Unread 11-29-2014, 11:32 AM   #7
Hosejockey61
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Quote:
Originally Posted by NHfireLJ View Post
what gearing do you currently have? Many run 35's w 4.10 gearing on the 4.0 with no issues...

If are not aware.... Swapping gears isn't as easy as pulling out the old and installing new.... It requires careful set up... not saying it can't be done by a novice but really should be done by an experienced tech... Can cost anywhere from $500- $1000 depending on the shop...
But why would you run 4:10 with that tire/tranny/motor combination? If you have to regear, do it right the first time. Throwing 4:10 out there doesn't even make sense. Even if the PO's current gearing is 4:10, I'd still set up both axles with 4:88 in anticipation of the 35's.
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Unread 11-29-2014, 12:04 PM   #8
irnmadn88
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Quote:
Originally Posted by relgnarw
If you live in the mountains I'd go 4.56 or 4.88. You'll need a deeper gear for some of those grades.
He has a point.

I see a LOT of Jeeps dogging it coming up I-70 from Golden- big tires and no gears.
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Unread 11-29-2014, 12:08 PM   #9
Jerry Bransford
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For 35's, go 4.88 which is an ideal ratio for that size tire and 5-speed transmission... ideal for both the highway and offroad. 4.56 isn't quite there. I've been "slightly" undergeared once when I ran 4.10 with 33's and I'll never make that mistake again.
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Unread 11-29-2014, 12:21 PM   #10
Dmarkowski
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When we regear to 4.86. Can you replace just the ring and pinion gear for the front and rear end? Or is it not that simple. Some people are saying that there is more to it than that but don't elaborate at all
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Unread 11-29-2014, 12:25 PM   #11
MrSmiley
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Quote:
Originally Posted by Dmarkowski
When we regear to 4.86. Can you replace just the ring and pinion gear for the front and rear end? Or is it not that simple. Some people are saying that there is more to it than that but don't elaborate at all

Quote:
Originally Posted by Wheelin98TJ
The D44 carrier break is 3.73/3.92. Whether a carrier change is needed depends on what your current ratio is. If you have the likely 3.73 ratio, you'll need the change carriers in order to gear to a deeper ratio (4.56, 4.88, etc.).
.
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Unread 11-29-2014, 12:25 PM   #12
Jerry Bransford
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Quote:
Originally Posted by Dmarkowski View Post
When we regear to 4.86. Can you replace just the ring and pinion gear for the front and rear end? Or is it not that simple. Some people are saying that there is more to it than that but don't elaborate at all
Changing the ring & pinion gears is a lengthy demanding process that if not done perfectly, will ruin a new ring & pinion gearset in short order. There is a great deal of expertise in getting it done correctly so the new gears will last and run quietly. If you go into a 4x4 shop with 4 mechanics in the back, maybe one of them will be experienced enough to be able to do a ring & pinion installation correctly.
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Unread 11-29-2014, 04:01 PM   #13
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Quote:
Originally Posted by Hosejockey61 View Post
But why would you run 4:10 with that tire/tranny/motor combination? If you have to regear, do it right the first time. Throwing 4:10 out there doesn't even make sense. Even if the PO's current gearing is 4:10, I'd still set up both axles with 4:88 in anticipation of the 35's.
If he already had 4:10s (I originally thought he had a rubi) then he could run what he has... 4.10 with 4.0 and 5 spd is a fine combination (not the best but works).... works fine on my YJ and now on my LJ 6 spd however... Why drop $1500-2000 if you don't have too...

Obviously he doesn't have 4:10 so the point isn't valid...
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Unread 11-29-2014, 04:13 PM   #14
Jerry Bransford
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I sure wouldn't agree that many run 4.10's with 35's and the 5-speed transmission with "no issue". Can it be done? Well, that depends on if you're happy with an inappropriate gear ratio that means more clutch slipping and poor performance when compared to having the right gearing for the tire size. My opinion is that if you can't afford to regear to the right axle ratio, you have no business installing 35's. 4.56? Maybe... that's at least debatable. But 4.10's with 35's when the transmission is the 5-speed, I sure wouldn't be telling anyone there would not be an issue running it.
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Unread 11-29-2014, 04:41 PM   #15
NHfireLJ
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Originally Posted by Jerry Bransford View Post
I sure wouldn't agree that many run 4.10's with 35's and the 5-speed transmission with "no issue". Can it be done? Well, that depends on if you're happy with an inappropriate gear ratio that means more clutch slipping and poor performance when compared to having the right gearing for the tire size. My opinion is that if you can't afford to regear to the right axle ratio, you have no business installing 35's. 4.56? Maybe... that's at least debatable. But 4.10's with 35's when the transmission is the 5-speed, I sure wouldn't be telling anyone there would not be an issue running it.
I agree its not the optimal, can it be done till the $$ for regear is available yes... Beats buying tires twice... And on my YJ with the stroker the extra HP / torque it was fine...
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