4:10, 33's, Dana M35 Rear, Dana 30 Front - JeepForum.com
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Unread 02-10-2004, 03:12 PM   #1
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Join Date: Jun 2002
Posts: 109
4:10, 33's, Dana M35 Rear, Dana 30 Front

I have been reading post after post after post and hearing a lot of different opinions, which is expected. But for clarification, will I be alright to have 4:10's and a trac loc in a stock Dana M35 rear (by the way, what does the M mean???) along with the 4:10's in the stock Dana 30 Front? I will be running 33's and do not plan to go bigger, I also do a lot of street/highway driving and offroad when I can, mainly dunes and trails...limited amount of rocks and very little mud.

2001 TJ
32" MT/R's
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Unread 02-10-2004, 04:48 PM   #2
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2003 TJ Wrangler 
Join Date: Jun 2003
Location: San Jose, CA
Posts: 1,642
You can get away with more tire and higher gearing on the road than offroad. But what's a Jeep for?

You can get away with more tire and higher gearing if you drive around like an old man all the time. But what's a Jeep for?

You can get away with more tire and higher gearing with a 2.5L - but you have the 4.0L I see.

You can get away with more tire if you re-gear to restore the stock RPMs, but you are not doing that - the natural tendancy is to use more throttle to restore acceleration - bad idea, but you can't help it.

You already knew all this, based on the way you asked the question. I'm not gonna encourage you, because I think you have already made up your mind to go ahead. I would encourage you to have a good backup plan - like hiking shoes, a canteen, and a couple of days of food. For when the axle breaks.

Even if you had the money and the desire to upgrade all the weak pieces, you might still break something and be stranded miles from the road - it's just less likely. Be prepared.

Edit: M35 is Dana Model 35 differential. The actual Jeep model axle is a Dana 194RBI, where R = Rear Axle, B = Beam Axle Design, I = Iron differential construction, and 194 is the diameter of the ring gear in millimeters.
1967 Kaiser Commando
2001 Grand Cherokee WJ
2003 Wrangler Rubicon TJ

Last edited by KaiserJeep; 02-10-2004 at 04:53 PM..
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