35s with 4.56 gears

[Jerry Bransford]

As far as the pinions being strong, would you go with Revolution over other brands? Thanks for the response. That info helps a lot.

Revolution's gears are manufactured by Circle K in S. Korea which is currently the best aftermarket gear manufacturer. Some others like Yukon also sell gears from Circle K but what they ship you is a crapshoot with them since they usually provide gears from their lowest price sources. You never know what you're getting from them. With Revolution Gear you know what you're getting which is not the case with most other sources of gears. So yes I personally would choose Revolution over any other source of aftermarket gears.

 

[kafrank05]

Revolution's gears are manufactured by Circle K in S. Korea which is currently the best aftermarket gear manufacturer. Some others like Yukon also sell gears from Circle K but what they ship you is a crapshoot with them since they usually provide gears from their lowest price sources. You never know what you're getting from them. With Revolution Gear you know what you're getting which is not the case with most other sources of gears. So yes I personally would choose Revolution over any other source of aftermarket gears.

Got it. 5.38 Revolution it is. Now to come up with the $1800...Thanks for all of the good info!

 

[Yellow TJ's]

I just did this exact thing....It's actually much better on highway than the 33"s and 4.56s better gas mileage high top end speed....etc. now off road obviously not as torquey but if you shift into 4 low, I don't have any issue crawling at altitude in her. Probably have to shift more than gearing up...but I cant imagine needing to gear 35's lower than 4.88 unless you have an automatic. (mine is a 5 speed)

 

[jjvw]

...but I cant imagine needing to gear 35's lower than 4.88 unless you have an automatic. (mine is a 5 speed)

I can because I lived it. 4.88 with the 5 speed was not quite enough for 35s. 513 would have been nicer all around.

 

[BC Moto]

I have 4.88s with the 5spd and its alright, once I go up in tire size I will go with a deeper gear

 

[TJosh02]

My Jeep came with 33s and 4.56 gears from my father. I went 35s. I basically never use 5th unless it is super flat or downhill.

I also swapped the np241 for the original np231. Happy overall but rarely use 1st in 4lo and often in 3rd on trails here. First is awesome when descending a super techy steep grade and basically don't need brakes

 

[Lemmy]

I’m debating on moving up to 35s from 33s I have 4.56 with nv3550, I’m 80% pavement and was wondering if I would be ok running 35s with 4.56?

4.56 with 35s and NV3550 worked well for me. Obviously 4.88 or lower would be better.
Still a good balance between Off-road and highway miles.

 

[jjvw]

4.56 with 35s and NV3550 worked well for me. Obviously 4.88 or lower would be better.
Still a good balance between Off-road and highway miles.

It isn't a good balance. Both on and off road suffer. Something that the under geared crowd rarely recognizes is that these low gears the rest of us argue for make highway driving better. This isn't just about off-road travel.

 

[BIGMike]

It isn't a good balance. Both on and off road suffer. Something that the under geared crowd rarely recognizes is that these low gears the rest of us argue for make highway driving better. This isn't just about off-road travel.

Do you think part of the debate comes from being at altitude? I ask because I have 4.88’s and 35’s waiting to go on. Mines a 3550 and seems that depending on forum, a lot find them completely acceptable and obviously some say 5.13. Multiple forget to mention transmission. Some do. Hell I’ve read so much sometimes i forget to look for transmission. I have no experience with either gear right now and don’t live in a high altitude area so I have no experience with that either. Just overthinking as usual probably.

 

[jjvw]

Do you think part of the debate comes from being at altitude? I ask because I have 4.88’s and 35’s waiting to go on. Mines a 3550 and seems that depending on forum, a lot find them completely acceptable and obviously some say 5.13. Multiple forget to mention transmission. Some do. Hell I’ve read so much sometimes i forget to look for transmission. I have no experience with either gear right now and don’t live in a high altitude area so I have no experience with that either. Just overthinking as usual probably.

No. For two reasons.

First, the early TJ with the 32rh rolled off the assembly line running higher rpms than the 3k rpm at 75mph I have been advocating for years.

Second, I have had my Jeep at many many altitudes with multiple tire size, gearing and transmission combinations. The best it ever drove where gearing is concerned is with 488, 33s, 5 speed. This was 3k at 75mph. And if what Jeep did from the factory is any indication, my gearing recommendation is not deep enough. Perhaps this is why there has never once been an occasion where I thought the Jeep was overgeared.

Third, altitude is part of Jerry's old argument to justify his years of bad gearing advice and never once understanding the math. I dismiss a large amount of what Jerry told us over the years, especially where modifying and building are concerned.

And fourthly, the deeply instilled cultural belief that Jeeps are slow, uncomfortable, rough, and poor handling is exactly why there is such an obstinace towards proper gearing. People spend the money on not enough gear; and justify the better but still poor results on it being a hopeless Jeep.

 

[hosejockey61]

People spend the money on not enough gear; and justify the better but still poor results on it being a hopeless Jeep.

Or that is perfect for them because they spent the money, therefore it must be best. People can't accept a bad uninformed spending decision. Especially when others with the same misperception told them that's what they heard from the internet pros.

 

[FarFire70]

My NSG370 with recent 35s (upgrade from 33s) with 4.56 has me a bit all over on decision on the gearing.

I haven't been off-road yet which I'm leaving to be the deciding factor for regear.

On the road - I like to slam gears and also cruise. Jeep seems to operate okay with this gear set and tires in the 1-3/4 gears.

I do a lot of highway on daily driving so 6th is 'ok' but I need to downshift to 5th, and sometimes 4th, if I hit a good hill on the highway.

So it is 'sporty' in lower gears but lots of shifting in the higher gears unless your on flat highway (pretty much only time 'OD' 6th makes itself useful).

—-

At this point, I can't justify moving just to 4.88 unless I really want to learn to regear in my garage for fun... But time will tell off-road if I want to go even deeper...

 

[JMT]

My NSG370 with recent 35s (upgrade from 33s) with 4.56 has me a bit all over on decision on the gearing.

I haven't been off-road yet which I'm leaving to be the deciding factor for regear.

On the road - I like to slam gears and also cruise. Jeep seems to operate okay with this gear set and tires in the 1-3/4 gears.

I do a lot of highway on daily driving so 6th is 'ok' but I need to downshift to 5th, and sometimes 4th, if I hit a good hill on the highway.

So it is 'sporty' in lower gears but lots of shifting in the higher gears unless your on flat highway (pretty much only time 'OD' 6th makes itself useful).

—-

At this point, I can't justify moving just to 4.88 unless I really want to learn to regear in my garage for fun... But time will tell off-road if I want to go even deeper...

Been there. 456 is not adequate as you discovered, and going to 488 is difficult because it’s just one step. @rasband swore by 513’s with this combination, so maybe you should think about that.

 

[L J]

But time will tell off-road if I want to go even deeper...

If you prefer to drive at 80+mph on the interstate, 4.88s.
If you limit your speed to 70 mph or less on the interstate, 5.13s.

 

[tworley]

I drive frequently at 75+ mph with 5.13s

 

[Ir0nH3@d]

If you prefer to drive at 80+mph on the interstate, 4.88s.
If you limit your speed to 70 mph or less on the interstate, 5.13s.

whats the logic behind this?
assuming 35" tires but what transmission?

I have no issues running at 80 mph with 35's and 5.38 gearing.

im running the 42RLE where the difference in RPM between 5.38 and 4.88 at 80 mph is 265 rpm

 

[L J]

whats the logic behind this?

The logic is that I, as well as FarFire70, have the NSG370 not the 42RLE.

 

[Ir0nH3@d]

The logic is that I, as well as FarFire70, have the NSG370 not the 42RLE.

fair, but you're talking about a 161rpm difference at 80 mph with the NSG370 between 4.88 and 5.13 gears.

 

[ChadH]

Haven't seen this shared in a while so it should help visualize some things being discussed with gearing and RPM range.

http://www.grimmjeeper.com/

 

[JMT]

fair, but you're talking about a 161rpm difference at 80 mph with the NSG370 between 4.88 and 5.13 gears.

What’s the logic between not taking advantage of the extra 161rpm’s that 513 provides over 488?