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Old 05-22-2009, 09:43 PM   #1
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how do u find out gear ratio ?

i was looking under the jeep on the rear end and found a little metal plate . it read this 52068860 LS
3.55 5662-3 does anybody know how to read this i belive its saying limited slip and that i have a 3:55 gear raito. is this true ? if not were find the gear raito on the rear end ? (i own a 94 wrangler 4.0 with abs brakes)

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Old 05-23-2009, 02:30 AM   #2
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You are right. You have 3.55's and a limited slip.

The other two ways of determing Gear ratio are: count the teeth on the ring gear and divide them by the teeth on the pinion. Second would be to jack up the rear end and count how many revolutions the driveshaft makes for one complete revolution of the tires. In your case it would go 3 and a half times.

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Old 05-23-2009, 08:19 AM   #3
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Okay I have the jeep from outer space where nothing is easily explained. Here is what my rear differential reads: The tag says 52111760AF 07606854
And the hub near the plug says:
432259484
REV K
02 27 97
That my friends tells me nothing, I know it is a DANA 35 but that is it.
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Old 05-23-2009, 11:44 AM   #4
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So... anybody able to figure out my gear ratio?
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Old 05-23-2009, 11:48 PM   #5
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well one of those numbers is the date . the tag your looking for is going to be on the bolts holding together the diff cover ! if you dont have one u can do what the guy posted above me . and put a mark on the drive shaft going across to the diff and then count the revolotions for example if the tire went three and a half times for one full time of the drive shaft u would have 3.55 like i do or if it went 3 time you would have a 3.07 so on and so forth . and thanks to the guy for the help i apreate it
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Old 05-24-2009, 06:19 PM   #6
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Old 11-20-2009, 09:18 PM   #7
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Quote:
Originally Posted by joemd60 View Post
Okay I have the jeep from outer space where nothing is easily explained. Here is what my rear differential reads: The tag says 52111760AF 07606854
And the hub near the plug says:
432259484
REV K
02 27 97
That my friends tells me nothing, I know it is a DANA 35 but that is it.
That top number is actually telling you the part number for the axle fluid. Second line, if you look closer to the left where the head of the bolt covers half of it, should say a 3 . 07 606854 - 1. That's telling you the gear ratio and axle type.
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Old 11-22-2009, 06:41 PM   #8
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What if you don't have any tags on the diffs?
I know what mine are though
2.74:1 (first gear)
1.54:1 (second gear)
1.00:1 (third gear)

(Furthermore, our records also indicate that your vehicle has 3.73 Axle
Ratio with 175MM Rear Axle and Dana 30/186MM Front Axle.)

I sent them the vin
(yea, yea, yea,I know the rear is kinda sucky)
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Old 09-29-2013, 05:16 PM   #9
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is swapping from 4.11 in 95 yj 2.5l 4cyl to 4.88 going to allow me to actually go 70 mph on the interstate?
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Old 09-29-2013, 05:30 PM   #10
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is swapping from 4.11 in 95 yj 2.5l 4cyl to 4.88 going to allow me to actually go 70 mph on the interstate?
Staying in 4th will, also consider that your speedometer is likely going to read lower than your actual speed and I'm assuming you are running 33's without changing the speedo gear.
But 4.88's should get you over the 70 mph mark with no problems and help to preserve your 5th gear from a meltdown.
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Old 09-29-2013, 06:39 PM   #11
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im running 31's with 17 inch wheels. stock 4 cylinder. now I know my 95 yj has 4.11 gears in it at the moment. how do I know what type of DANA axle do I have?
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Old 09-29-2013, 06:44 PM   #12
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im running 31's with 17 inch wheels. stock 4 cylinder. now I know my 95 yj has 4.11 gears in it at the moment. how do I know what type of DANA axle do I have?
If it's factory then it's a 30 up front and a 35 in the back. A 35 is easily identified if it has a factory diff cover with a plastic plug. A 30 has come in the front since 76 with the exception of TJ and jk rubicons that have a 44 with 30 tubes knuckles and brakes.
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Old 09-29-2013, 06:48 PM   #13
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sweet! that's what I have. what do yu recommend I get other than the install kit and ring and pinion? Firat time swapping gears. Just want to do it right.
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Old 09-29-2013, 06:50 PM   #14
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sweet! that's what I have. what do yu recommend I get other than the install kit and ring and pinion? Firat time swapping gears. Just want to do it right.
You will need all of the tools to set backlash and a lot of patience. It's always doable, but I build these for a living and outsource gears to give you an idea of the level of complexity involved.
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Old 09-29-2013, 06:53 PM   #15
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yeah my boss is ASE certified and been around them for years. I wouldn't try this alone. what would I be looking at price wise to have a shop do it?
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Old 09-29-2013, 06:58 PM   #16
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yeah my boss is ASE certified and been around them for years. I wouldn't try this alone. what would I be looking at price wise to have a shop do it?
Honestly prices vary per region, in the southwest it seems to be around the 1200 mar for front and rear but goes up as you move toward the east coast.
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Old 09-29-2013, 07:40 PM   #17
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I have a 98' unlimited with 18" wheels and 295 tires. If I don't drive with the od off when ur cursing the speed drops then down shifts. An y help would be great. Thanks
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Old 09-29-2013, 08:04 PM   #18
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well one of those numbers is the date . the tag your looking for is going to be on the bolts holding together the diff cover ! if you dont have one u can do what the guy posted above me . and put a mark on the drive shaft going across to the diff and then count the revolotions for example if the tire went three and a half times for one full time of the drive shaft u would have 3.55 like i do or if it went 3 time you would have a 3.07 so on and so forth . and thanks to the guy for the help i apreate it
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