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General Forums => The Mess Hall => Topic started by: Lu on May 26, 2011, 12:41:28 PM

Title: Regearing curiosity
Post by: Lu on May 26, 2011, 12:41:28 PM
Quick question... I will be putting 33s on the rig soon and will most likely need to regear. My question is: is it imperative to regear both front and rear?  What would happen if i regeared only the rear?
Title: Re: Regearing curiosity
Post by: Jeffy on May 26, 2011, 12:51:32 PM
Quick question... I will be putting 33s on the rig soon and will most likely need to regear. My question is: is it imperative to regear both front and rear?  What would happen if i regeared only the rear?
You would not be able to shift into 4WD.
Title: Re: Regearing curiosity
Post by: sharpxmen on May 26, 2011, 02:22:39 PM
You would not be able to shift into 4WD.

and if you do that you'd brake something in the drivetrain.
Title: Re: Regearing curiosity
Post by: Torch_Ind on May 26, 2011, 03:58:51 PM
and if you do that you'd brake something in the drivetrain.

 :thumb:

Title: Re: Regearing curiosity
Post by: FourbangerYJ on May 26, 2011, 04:17:34 PM
and if you do that you'd brake something in the drivetrain.
Pretty sure the T- case would...
 (http://i259.photobucket.com/albums/hh307/NosferatuJ/nuclear-explosion.jpg)
Title: Re: Regearing curiosity
Post by: Jeffy on May 26, 2011, 04:26:21 PM
If anything was going to BREAK it would probably be a U-joint.  The front axle would drag the slower rear axle.
Title: Re: Regearing curiosity
Post by: Torch_Ind on May 26, 2011, 04:28:59 PM
If anything was going to BREAK it would probably be a U-joint.  The front axle would drag the slower rear axle.

depends if your shifting on the fly or not lol
Title: Re: Regearing curiosity
Post by: neale_rs on May 26, 2011, 04:30:35 PM
It could work if you put the 33s only on the rear axle and regeared just right.
Title: Re: Regearing curiosity
Post by: Jeffy on May 26, 2011, 04:50:03 PM
It could work if you put the 33s only on the rear axle and regeared just right.
That's what stadium trucks used to do.  Run 33's up front with 4.10's and 35's in the rears with 4.56's.

Some mud trucks run similar setups so the front floats more.
Title: Re: Regearing curiosity
Post by: FourbangerYJ on May 26, 2011, 04:58:52 PM
If anything was going to BREAK it would probably be a U-joint.  The front axle would drag the slower rear axle.

The front and rear outputs would spin at different speeds. The chain system is not set up for 2 speeds at once. Something would need to give.
Having 2 tire sizes to offset 2 gear ratio's works since it puts everything back to + or - a tolerable amount.
Title: Re: Regearing curiosity
Post by: jcrockarell9937 on May 29, 2011, 04:17:36 PM
just looking ahead at future plans...Is regearing worth it?(I mean I understand that performance will suck if you dont) Price? And does it eliminate 5th gear in a 5 speed manual?
Title: Re: Regearing curiosity
Post by: Jeffy on May 29, 2011, 08:52:10 PM
just looking ahead at future plans...Is regearing worth it?(I mean I understand that performance will suck if you dont) Price? And does it eliminate 5th gear in a 5 speed manual?

Will it make a difference, yes.  Is it noticeable, yes. is it expensive, yes.  Is it worth it, yes.
Title: Re: Regearing curiosity
Post by: FourbangerYJ on May 29, 2011, 11:27:37 PM
Will it make a difference, yes.  Is it noticeable, yes. is it expensive, yes.  Is it worth it, yes.

Agreed! For a small underpowered motor gearing is a HUGE part of making it work right.
Title: Re: Regearing curiosity
Post by: knotts89 on May 30, 2011, 02:38:29 AM
I think its the only way to make it enjoyable to drive if you have 33s or bigger but that's just my opinion
Title: Re: Regearing curiosity
Post by: jfrabat on May 30, 2011, 09:27:12 AM
I used to run 31's and 4.88, and it was almost like having a 4.0L.  When I switched to 33's, it went back to a 4-banger again...  I now wish I had gone with D44's front and rear so that I could go to 5.13's instead of 4.88!
Title: Re: Regearing curiosity
Post by: Jeffy on May 30, 2011, 11:33:26 AM
I used to run 31's and 4.88, and it was almost like having a 4.0L.  When I switched to 33's, it went back to a 4-banger again...  I now wish I had gone with D44's front and rear so that I could go to 5.13's instead of 4.88!
That's kind of funny.  Since I'm running 33's now, I love my 4.56's.  I'm not sure if I could stand going lower actually.  Maybe it's because of the mods or maybe it's because I'm running skinnier tires and have no added width to the Jeep (aerodynamics) but I'm finding 4.56's pretty peppy while still letting me cruse at 70-75mph.
Title: Re: Regearing curiosity
Post by: 95 Lowbuck on May 30, 2011, 11:40:46 AM
Yes it's worth it to go 4.88's if you have 4.10's.
Maybe not if you have 4.56's + mods.
I'm pretty stock and need all the gearing I can get.
Title: Re: Regearing curiosity
Post by: jcrockarell9937 on June 04, 2011, 01:55:12 PM
So if you do decide to regear for 32 or 33s, 4.88s?

How much is a regear total?
Title: Re: Regearing curiosity
Post by: Jeffy on June 04, 2011, 02:11:16 PM
So if you do decide to regear for 32 or 33s, 4.88s?

How much is a regear total?
I had no problems with 4.56 and 32's and I really like 4.56's with my skinny 33's and mods.  Although most people and I tend to agree that you might as well go with 4.88's.  I forget what the exact number is but it's something like 4-500 more RPM's then with 4.56's.

Regearing really depends.  You'll spend around $300-400 on parts alone.  Most 4x4 shops will charge anywhere from $1300-1800 for everything.  I'd recommend checking speed shops that work on race cars as opposed to imports.  They typically do gears often and are quick.  You might even be able to haggle a discount if you bring the axles in by themselves.

Still the cheapest is to probably find a club or friend who can do them over lunch and a few bucks.  $75-200 an axle is be a good deal.
Title: Re: Regearing curiosity
Post by: Eucalypta on June 07, 2011, 10:26:11 AM
There used to be a neat gear and tire applet here: http://www.jeeptech.com/javaAps/gta.html
Not sure if it runs on your pc's; mine seems to give an error.
Nevertheless; explenation enough on the page.
Title: Re: Regearing curiosity
Post by: aw12345 on June 07, 2011, 04:01:34 PM
I like to use this calculator, lets you do a side by side comparison
and gives you speed and rpm in all gears

http://www.grimmjeeper.com/gears.html
Title: Re: Regearing curiosity
Post by: Eucalypta on June 09, 2011, 01:36:35 AM
I like to use this calculator, lets you do a side by side comparison
and gives you speed and rpm in all gears

http://www.grimmjeeper.com/gears.html

 :thumb:

So for my '94 Wrangler with AX5 and NP231:
On stock tires 29" (??) and 4.10 gearing I get the same results with 33" and 4.88 gearing ???

Is that correct? Will the car have the same top speed and performance offroad as I now have with my stock 4.10 and 33" or will they really improve?

Title: Re: Regearing curiosity
Post by: sharpxmen on June 09, 2011, 01:47:11 AM
:thumb:

So for my '94 Wrangler with AX5 and NP231:
On stock tires 29" (??) and 4.10 gearing I get the same results with 33" and 4.88 gearing ???

Is that correct? Will the car have the same top speed and performance offroad as I now have with my stock 4.10 and 33" or will they really improve?



if stock tires are 29 then the needed gearing for 33 to bring it back to stock final ratio (speed to rpm) is 4.66 (so 4.56 would be closest)
for 28'' would be 4.83 (in this case 4.88 would be the closest one)

i would go 4.88 regardless

your performance will improve
Title: Re: Regearing curiosity
Post by: Eucalypta on June 09, 2011, 07:11:07 AM
Great!

I see somenice deals on R&P's.
Prices do vary.
Alloy: 204,99 US$
Superior: 243,95 US$
G2: 180,99 US$
Motive Gear: 192,95 US$

Any idea's on the quality?
Title: Re: Regearing curiosity
Post by: jfrabat on June 09, 2011, 07:50:47 AM
Great!

I see somenice deals on R&P's.
Prices do vary.
Alloy: 204,99 US$
Superior: 243,95 US$
G2: 180,99 US$
Motive Gear: 192,95 US$

Any idea's on the quality?

I just went through this; check this thread (second page):

http://4bangerjp.com/forums/index.php/topic,9919.0.html

Feliipe
Title: Re: Regearing curiosity
Post by: neale_rs on June 09, 2011, 08:07:23 AM
I read in a magazine recently that Currie installs Motive Gears in their axles.  That should be a pretty good indication of their quality.
Title: Re: Regearing curiosity
Post by: sharpxmen on June 09, 2011, 08:53:05 AM
Great!

I see somenice deals on R&P's.
Prices do vary.
Alloy: 204,99 US$
Superior: 243,95 US$
G2: 180,99 US$
Motive Gear: 192,95 US$

Any idea's on the quality?


you should be able to get the Motive cheaper than that

Motive or Superior - yes
G2 - NO
Alloy USA - not sure