3.21s with 35's

Sugarbear · Jan 30, 2014

I got a 2014 sport 2 door with a D44 rear and D30 front and according to the window sticker I have 3.21 gears would it be a bad idea to run 35's or will I be alright ??

1BAMFR · Jan 30, 2014

You can run 3.21 gears with 35s but your Jeep is going to feel like your towing a yacht behind it!

4.88s is what you need.

badassbrass · Jan 30, 2014

Sugarbear said:
I got a 2014 sport 2 door with a D44 rear and D30 front and according to the window sticker I have 3.21 gears would it be a bad idea to run 35's or will I be alright ??

I had a 3:21, with 35" nice ride, but must calibrate.

Sugarbear · Jan 30, 2014

1BAMFR said:
You can run 3.21 gears with 35s but your Jeep is going to feel like your towing a yacht behind it!

4.88s is what you need.

Lol I'll tow the yacht for a little till I can afford the 4.88 I see your from PA where about are ya ??

badassbrass · Jan 30, 2014

Sugarbear said:
I got a 2014 sport 2 door with a D44 rear and D30 front and according to the window sticker I have 3.21 gears would it be a bad idea to run 35's or will I be alright ??

And kill your esp abs!( if you offroading)

noroad · Jan 30, 2014

3.21s on 37s here, suckkkksss. thank god its a stick, with 35s it will work but if your like me and just waiting on money to get new gears its do able.

JKWrang · Jan 30, 2014

badassbrass said:
And kill your esp abs!( if you offroading)

If you're off roading in 4Lo your ESP shuts off..

JKWrang · Jan 30, 2014

Sugarbear said:
I got a 2014 sport 2 door with a D44 rear and D30 front and according to the window sticker I have 3.21 gears would it be a bad idea to run 35's or will I be alright ??

This is what I plan on doing too until I can afford to upgrade. It shouldn't be too bad, but it's not going to be the same that's for sure. For what it's worth, my Jeep was in a near head on collision and my wife's foot got caught, keeping the pedal down.

In 3.21's the Jeep pushed the Ford Escape a good 500 feet. So while that's not a yacht... :rock:

1BAMFR · Jan 30, 2014

Sugarbear said:
Lol I'll tow the yacht for a little till I can afford the 4.88 I see your from PA where about are ya ??

Hahahaha, I am in York!

You should come to the Rausch Creek trail days we have.

In5ane1 · Jan 30, 2014

Good question..im in same boat! Its either $1500 now for gears...or for tires. However, im currently running 33's and wouldnt mind a lil more power...

cozdude · Jan 30, 2014

in my 2011 i had 3.73 and 35's for a long time (its equivilent to what you have with the 3.21's) and by long time it was 3 months. that was the longest 3 months i have ever driven in my jeep. it was soooo slow it was crazy. that being said if i had to suffer like that again in the future i would because at the end of the day i got my gears upgraded and it is now amazing!

seanb33 · Jan 30, 2014

I have 3.21 gears in my 2012 jku with 35" toyos. Although it is a bit sluggish at times, you should have no problem doing this and should be fine. I will definitely be regearing when I lose the d30 up front though

IBeHeWhoIsJoshua · Jan 30, 2014

seanb33 said:
I have 3.21 gears in my 2012 jku with 35" toyos. Although it is a bit sluggish at times, you should have no problem doing this and should be fine. I will definitely be regearing when I lose the d30 up front though

How is highway cruising? I had 37's for a week and had to manually leave it in 3rd haha...was terrible and had to sell them. Got my eyes on 35's in the near future though. I noticed gear cycling just going from my mall crawler tires to the rubi tires...I guess I need a tuner to calibrate everything.

seanb33 · Jan 30, 2014

It's not bad, It tends to shift into a gear and makes you go faster than you want to but the shifting mode with the automatic fixes that nicely. I usually cruise around 75-80 and don't have issues doing that. RPM's are around 2700 at 80

IBeHeWhoIsJoshua · Jan 30, 2014

seanb33 said:
It's not bad, It tends to shift into a gear and makes you go faster than you want to but the shifting mode with the automatic fixes that nicely. I usually cruise around 75-80 and don't have issues doing that. RPM's are around 2700 at 80

Thanks for the reply. Seems like gear change won't have to be immediate...

seanb33 · Jan 30, 2014

IBeHeWhoIsJoshua said:
Thanks for the reply. Seems like gear change won't have to be immediate...

Not in my opinion. I've been on 35s for around 12k miles and haven't regeared because I don't want/need to waste money on the d30

IBeHeWhoIsJoshua · Jan 30, 2014

seanb33 said:
Not in my opinion. I've been on 35s for around 12k miles and haven't regeared because I don't want/need to waste money on the d30

Thanks again thats how I feel. :beer:

NY1982JK · Jan 30, 2014

I have a '13 JKU S Auto with 3.21's and just went with 35" Trail Grapplers. It's Definitely usable, though as previously mentioned after a little while you are gonna want to regear.

I did take a HUGE hit in MPG, but honestly it was worth it. Went from 20-21 Highway to 15.5 maaayyybe 16 if I Granny it. With the Auto, 5th gear doesn't exist anymore. You will notice a lot more gear searching than you've had before.

I would personally say do it, then make gears your next priority.

In5ane1 · Jan 30, 2014

On the recalibration...I got it that the ProCal doesn't tune, but seems like if you recalibrate and your spedometer is back on, then the jeep would drive better due to adjusted shift points. I also realize this won't turn a 3.21 geared JKU into a 4.88....but does a recalibration help to some extent? I went from the baby wheels (maybe the 225's) to 33" MT's. My shifting does seem a bit off.

Just figured I'd ask...

Sugarbear · Jan 30, 2014

If I have a manual do I still need to calibrate?? I don't mind if my speedo is off a little

3.21s with 35's

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Guy with a Red 2-Door

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