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Unread 02-03-2012, 07:39 PM   #1
Landrunner01
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2001 TJ Wrangler 
 
Join Date: Dec 2011
Location: Lenoir, NC
Posts: 17
front passager side hub area leak

Hey Guys,

I got a leak on the front right hub area of my jeep. I want to replace the seal on that side. I have a 2001 Jeep Wrangler 4x4 sport 4.0L where and how do I know my gear rato and which Dana axles I have?


Ty

Dwight

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Unread 02-05-2012, 08:07 AM   #2
Jason
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2005 TJ Wrangler 
 
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If your axle hasn't been replaced with something different, you have a Dana 30 in the front. You can easily tell the rear axle by looking at it; it's either a 35 or a 44. http://www.jeepforum.com/forum/f9/st...1/#post4118396

Gear ratio: http://www.jeepforum.com/forum/f9/fa...-ratio-615380/

Axle seal: http://www.stu-offroad.com/axle/d30seals/seal-1.htm
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Unread 02-05-2012, 02:14 PM   #3
Landrunner01
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Thanks Jason i reseached it last night and found out that I do have the dana 30 and the 44 on the back. Next question do both the front and back have to be the same gear ratio?
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Unread 02-05-2012, 05:23 PM   #4
Jason
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Yes, front and back must have the same ratio. Now, that being said, you may find a slight difference (one or two HUNDREDTHS) in the actual ratio. This is because of the tooth counts on the gears. For example. I technically have 4.55555555555~ gears in my front axle (41 tooth ring gear and 9 tooth pinion gear) and 4.5454545~ in my rear (50 tooth ring and 11 tooth pinion). These round to 4.56 and 4.55 respectively, and would be commonly referred to as 4.56s. You might hear them referred to as 4.55s. "4.10s" could actually be 4.09, 4.10 or 4.11. This small difference doesn't matter; mixing ratios like 3.07 and 4.10 will be an expensive disaster.
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Unread 02-06-2012, 06:02 PM   #5
Landrunner01
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Thanks again ok one more question well at least one more question. which ratio is best for offroad and which is stronger and which one would get better gas mileage. The higher the ratio like 3.73:1 vs 3.07:1.
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Unread 02-06-2012, 06:21 PM   #6
Jason
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I think that's actually 3 questions.

The answer to all of them depends on the transmission and tire size. With the 33s and manual transmission you have listed in your profile, 3.73s would deliver better gas mileage and better power over the 3.07s; however, neither are optimal. I had 3.73s on 30s, then 33s, with a manual for years. I got 20 mpg on the highway once with the 30s, a hardtop and a violent hangover (driving slowly). That dropped to around 14 or 15 with the 33s. I regeared recently to 4.56 and hope for better gas mileage because even though the RPM will be higher, the engine will actually not work as hard to maintain speed.

Numerically higher gear sets are theoretically weaker, but ring and pinion strength is generally not a concern with these smaller axles (vs. one-tons, etc.) for the various gearsets. You can only gear so deep with these (4.88 limit on the D30 and D35; 5.13 on the D44) The weak points are elsewhere.

YMMV, as they say.

Edit, question: Is that yellow Jeep in your profile yours?
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Unread 02-06-2012, 07:45 PM   #7
Landrunner01
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Yeah that my jeep
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axle , axle assembly , dana , front axle , seal leak
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