Originally Posted by jknit

I got 5.13's for xmas for my 2010 wrangler unlimited mountain edition, 3.73's in the d30 up front so I shouldn't need a new axel housing, and its a d44 in the back. Called Boston Jeepz today in Newton, Ma and they said they wouldn't install them in my jeep, that it wouldn't be good for my jeep and I should get new teraflex axels, and that I wouldnt notice any difference unless I supercharged the jeep too? This isnt something I have ever heard. Im not expecting to feel like I am on a rocket ship with the new gears but everyone said the driveabiliy post re-gear is day and night, I did my research before I got the 5.13's...even talked to Northridge. Is this just a case of someone not knowing what they were talking about or what? Any advice would be much appreciated, and any other shop suggestions in the greater boston area would be great.

Originally Posted by Matthewd5

I'm pretty Wes's in the gearing dilemma, other than the fact you have a 2010 and the 3.8...

But I never saw any mention of you getting bigger tires?

When uncertain about my regearing I relied on the charts for reinforcement

I went with 5:13 but I went with big tires, with a 3.8 my guess would be that your going with 35's?

Like I always say, 35's are the new 33's and 37's are the new 35's

But if you are going to 35's there plenty of threads about sleeves and gussets...which are good temporary fixes, your Jeep is only as good as your weakest link

Matthew

Originally Posted by jkd3624

Going from 3.21 to 4.88. Was day and night to me personally. Sounds like the guy was trying to sell you a bunch of shit. You'll notice a lot of difference I think but depending on tire size and most people I have talked to a Dana 30 you max size is a 35" tire. Your going to some day want to replace your axle to a Dana 44 front in which case I would look at pro rock. If you talked with northridge I would trust what they say. They always know their stuff

Originally Posted by Matthewd5

Northridge did a great job guiding me on my maze navigation as far as wheel size and weakest links goes...

I really needed lockers, and it didn't take a lot of math to figure out that just swapping gears and adding lockers was going to quickly add up.

Plus the whole reinforcing my d30 up front...I looked into avoiding all that stuff and David at Northridge pointed out the Dynatrac pro rock d44

So I wound up going at it big time, then I realized I had heavy duty everything and it would be a waste not to just goto 37's

I am so happy that I did...2012 with 5:13's and manual transmission it feels like an all new Jeep, better even than stock with 3:21's and 255 tires!

Thing handles like a slightly heavy sports car now

Can't wait till next years trail rides and Jeep Jamborees!


Matthew

Originally Posted by jknit

I have 37's, had them for a while just kept pretending to myself that I didn't like the sluggishness, Im not looking for more power I just want things as simple as keeping up my highway speeds.

Originally Posted by Matthewd5

Just going to 33's with 3:21's really sucked on the highway! i am really loving my 5:13's, if it was a true dd I could probably go with 4:88's, but 1/2 my reason for getting the Jk and doing the Dynatrac overhaul was rocky trails and Jeep Jamborees! matthew

Originally Posted by jknit

I dont offroad

Originally Posted by jknit

I dont offroad so I am not too concerned with the weak points, I know I need to gusset and sleeve

Originally Posted by jknit

I have 37's, had them for a while just kept pretending to myself that I didn't like the sluggishness, Im not looking for more power I just want things as simple as keeping up my highway speeds.