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Topic Review (Newest First)
02-28-2013 03:54 PM
00TJSport Not trying to butt in...but how do I tell of I have a low or high pinion?
02-21-2013 10:43 AM
freeskier
Quote:
Originally Posted by timothy View Post
Ok that good to know. So all i need is new master bearing kit (that i already have) new ring and pinion (3.55 or 3.73 ratio) new carrior do i need new carrior for both differential somone told me i dont have to change carrior on dana 30 i can go deeper without change carrior but i have to change the rear dana 35 carrior is that true. Is there anything else i need to do to change gears.
The carrier break for the D35 is 3.55/3.73. Anything 3.55 and numerically lower and you can re use your carrier, anything 3.73 and numerically higher and you need a new carrier. I would highly suggest you go with 4.10. It is my opinion that no TJ should have ever came with anything numerically lower than 4.10.

Your front D30 has the same carrier break, however some companies make thick cut gears. This means you could run 4.10 thick cut gears on the 3.55 and numerically lower carrier.
02-21-2013 09:54 AM
timothy
Quote:
Originally Posted by Jerry Bransford View Post
Yes the spider gears don't care if it's a high or low ratio case, they just are particular to axle model like Dana 30 or Dana 44.
Ok that good to know. So all i need is new master bearing kit (that i already have) new ring and pinion (3.55 or 3.73 ratio) new carrior do i need new carrior for both differential somone told me i dont have to change carrior on dana 30 i can go deeper without change carrior but i have to change the rear dana 35 carrior is that true. Is there anything else i need to do to change gears.
02-21-2013 09:31 AM
Jerry Bransford Yes the spider gears don't care if it's a high or low ratio case, they just are particular to axle model like Dana 30 or Dana 44.
02-21-2013 08:58 AM
timothy
Quote:
Originally Posted by beerly View Post
I'm pretty sure the spider gears are swappable and are specific to the actual diff (D30 and D35). I have had to replace spiders in the front and rear and the only specification when buying them were the differentials. I'm getting ready to regear to 4.56 (for 33's) and all I bought were the ring and pinions, carriers and rebuild kits.
Oh ok
02-21-2013 08:53 AM
beerly I'm pretty sure the spider gears are swappable and are specific to the actual diff (D30 and D35). I have had to replace spiders in the front and rear and the only specification when buying them were the differentials. I'm getting ready to regear to 4.56 (for 33's) and all I bought were the ring and pinions, carriers and rebuild kits.
02-21-2013 08:40 AM
timothy Do i have to chang the spider gear to for the new gears ir can i use the one i have
02-21-2013 08:35 AM
timothy
Quote:
Originally Posted by beerly View Post

That's what I said. Carriers are cheap. Not to say you will ever go bigger, but if its a remote possibility and you're regearing anyway, might as well plan for just one more step up, maybe 33's. That way you don't feel stuck with what you have down the road by only gearing for 31's.
Yeah your right
02-21-2013 08:17 AM
beerly
Quote:
Originally Posted by timothy View Post
I have a 5 speed nv3550 trans. Im running i think 31 and no im not going to go bigger

That's what I said. Carriers are cheap. Not to say you will ever go bigger, but if its a remote possibility and you're regearing anyway, might as well plan for just one more step up, maybe 33's. That way you don't feel stuck with what you have down the road by only gearing for 31's.
02-18-2013 03:36 PM
Dextreme
Quote:
Originally Posted by KingTJ View Post
No intention of doing it myself. A friend of mine runs a garage where I'm from and he has his guys do work for me for little to nothing, I just buy the parts. I'm pretty handy and work on just about everything else myself but when it comes to gears I'm a deer in headlights. Therefore if I know what materials I need I can have him and his guys quote me a price for labor.
Personally, I would have them order "all the parts". That way if there is a issue with a part or installation, they will deal with it and it won't be on you to resolve. They might even get the parts at a better price.
02-18-2013 03:18 PM
timothy
Quote:
Originally Posted by Jerry Bransford View Post
What size tires are you running, and which transmission are you running, the automatic or 5 speed? And do you plan on going to bigger size tires in the foreseeable future?
I have a 5 speed nv3550 trans. Im running i think 31 and no im not going to go bigger
02-18-2013 10:24 AM
KingTJ
Quote:
Originally Posted by Atthehop
If you are not familiar on how to set up gears, it is not just a remove and replace operation.
No intention of doing it myself. A friend of mine runs a garage where I'm from and he has his guys do work for me for little to nothing, I just buy the parts. I'm pretty handy and work on just about everything else myself but when it comes to gears I'm a deer in headlights. Therefore if I know what materials I need I can have him and his guys quote me a price for labor.
02-18-2013 10:11 AM
Atthehop If you are not familiar on how to set up gears, it is not just a remove and replace operation.
02-18-2013 10:10 AM
KingTJ Interested in this as well. I have stock 3.07 gears and am running the 4.0L auto. I currently am running 32x11.50 and have heard that jumping to a 3.73 would be more idea. I've also heard that 3.73 is the cut off where I wouldn't have to replace the carriers and would have to just get a new ring and pinion. Not sure if that's completely true. Hopefully jerry can shed some light on this situation.
02-18-2013 10:02 AM
Jerry Bransford What size tires are you running, and which transmission are you running, the automatic or 5 speed? And do you plan on going to bigger size tires in the foreseeable future?
02-18-2013 09:56 AM
PStov98TJ I'm not 100% sure what all you need but if you are replacing the 3.07 gears already, why not upgrade them to 4.10's or 4.56's if you have oversize tires?
Only downside to upgrading your gears to a lower ratio (higher numerical number) is you'd also have to replace the gears in the front if you want to use 4 wheel drive
02-18-2013 09:54 AM
timothy
can i change my 3.07 gear ratio to a higher gear ratio

I need to do My 01 wrangler sport differentials. The bearing are bad. I was only just going to do the bearing but im not sure if the gears are bad. So im thinking of changing the gears to. My qustion is what do i have to do to change gear ratio can i just buy the gears and the the bearings and put them on or do i have to change everything in the diff like the spider gear and what what ever else is in there.

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