Real World Comparison Jeep Gladiator 5.13 vs 4.88 Gears

Whats should you choose? 5.13 gears? 4.88 gears? Stock gears? Lots of opinions and conjecture from keyboard warriors about 5.13 vs. 4.88 gears. Blake (IG: jeepymcjeepfaceyyc ) and I decided to share our real world experiences and do some similar tests. Please check it out....weigh in on your choice and enjoy! Please like, subscribe and hit the notification bell. #JTRSPARTACUS

[@chanerx]

About darn time someone did the real world comparison. Thank you for this. Great job.

[@JTRSpartacus]

Thanks for watching. Now that I have 5.13s I have zero regrets. 4.88 would have been ok too. It’s not really a huge deal but it’s great to see the difference and make your choice. Thanks for watching!! #JTRSPARTACUS

[@craigversetti5700]

Great video ! Thanks fellas !! Honestly being a former machinist it's really about what I'd expect , 488 & 513 are really similar and shouldn't have a huge huge difference between the two. Now if we're talking 438 to 538 I'd expect to see a bigger more noticeable difference.... I am curious to see the MPG difference between the two? Actual calculations not digital dash readings lol

[@JTRSpartacus]

Thanks for watching. I’d guess mileage differences would be negligible. Lots of factors with the driving style, traffic, terrain, and vehicle weight being big ones. I did a trip to Yellowstone and back from PA and calculated 15.6 mpg - dash showed 16. I get about 13.6 driving around home in hilly PA in short trips and usually lugging stuff. #JTRSPARTACUS

[@richardrussell1930]

Like to see this with auto and also maybe a 0-60 test. What’s the difference at lower gears when coming up to speed.

[@100pyatt]

Good question

[@ghernandez6457]

Damn I wished this was an 8 speed auto comparison. I am at around 2400 Rpm going 75 on seventh gear on 4.10s on 38s. I might get my 8th gear back with 4.88s, 5.13s might be too much.

[@bbannongmu]

Thanks for watching. Probably not too much at 5.13 for 38s. Really depends on where you live/drive and what you use your JT for. #JTRSPARTACUS

[@100pyatt]

I think the 5.13 would be totally fine the overdrive is insane on these

[@VeryCoolJeep]

I can hear that Centerforce Clutch roooar love it!

[@keithfraser364]

I did notice that there was about 30 degrees difference in air temperature. I wonder how much that affected the test. Other factors would be actual tire size, pressure, and difference in height above sea level. All very interesting. Thank you for posting!

[@JTRSpartacus]

Not scientific but still useful. Thanks for watching!! #JTRSPARTACUS

[@ricklime1793]

One truck is Fahrenheit, and one is Celsius. 34 degrees F to -1 C is a difference of 3 degrees Fahrenheit. Virtually no difference.

[@JTRSpartacus]

Good catch! Again - not scientific but a reasonable comparison. Thanks for watching! #JTRSPARTACUS

[@4X4ish]

In a manual, the engine speed vs all those other variables doesn't matter since it is a mechanical connection

[@TerraFirmaX]

@@4X4ish Exactly, except for actual tire size

[@llegacy1870]

Great job. Love the side by side comparison.

[@JTRSpartacus]

Glad you liked it! Thanks for watching. #JTRSPARTACUS

[@jamesschneider6136]

Thank you! I’m going w/ the 4.88’s

[@JTRSpartacus]

Nice! Good luck. You really can’t go wrong with either. #JTRSPARTACUS

[@St.PierreProductions]

Where are you? Those trees behind you were absolutely GORGEOUS!!

[@JTRSpartacus]

Southern Chester County, Pennsylvania. Thanks for watching! #JTRSPARTACUS

[@pitin8201]

Good video. I would like to see the first 1-4 gears side by side. I have people telling me if I go with 5:13 that I won’t have a first gear.

[@JTRSpartacus]

I have 1st gear and use it daily. It’s short but unless it’s completely flat or downhill, I use 1st to take off. The difference between 4.88 and 5.13 is about 5%. I’d rather have the extra 5% lower gears in the mountains or when towing. Thanks for watching. #JTRSPARTACUS

[@wailingalen]

Thanks for this vid. Got a JL Sport with 6MT. Doing research on gearing bc I would like to upsize tires in near future. Nothing crazy. Def 33 MAYBE 35. Got the stock All Terrain Wranglers. Haven't had a chance to take her off road yet. Will see how she does. Who knows, I might keep it bone 🦴 stock after all is considered!!! Def gonna put an exhaust tho 😇

[@JTRSpartacus]

Glad I could help! Good luck. #JTRSPARTACUS

[@Rottie_713]

Im glad i found this because i have a 6mt mojave wondering if different gears function different compared to at

[@JTRSpartacus]

Nice! #savethestick You really can’t go wrong with either. Good luck! #JTRSPARTACUS

[@thetrailaheadofus]

I have a Rubicon (4.10 factory) and I just switched to 5.13 gears. I went to a 37 from 35 inch tire and upgraded to chromoly axle shafts. Everyone I talked with said 5.13. Go with 5.13. Even my install shop. I absolutely HATE them. When I'm driving on the highway at 70, the RPMs sounds like the engine is going to blow. I literally filled the tank, drove 63 miles so far and I'm at HALF A TANK. It's ridiculous. Now, I'm faced with buying 4.88 gears and going through the pains of install and the dreaded 500 miles again. Going to a 37 actually helped drop the RPM about 250. But it's still a nightmare on the highway. Sorry for the rant. lol but it's been that bad for me.

[@JTRSpartacus]

Sorry to hear. Not sure why you are running such high rpm. The engineering doesn’t make sense. The difference between 5.13 and 4.88 is marginal and probably a big waste of your money. You may have another issue. Do you have a manual trans?? If you have an auto, did you correct the gears and speedo? Good luck! #JTRSPARTACUS

[@thetrailaheadofus]

@@JTRSpartacus sadly, so much of this is over my head. I did this based on what my shop suggested for my needs. I have a Superchips computer module and everything there is correct. Set for 37's and 5.13's. The gears were installed prior to 37's being installed and that's when I was seeing 3,000 RPM at 70 mph. The 37's helped reduce that by about 250 RPM. It's an Auto. The shop says everything is running as it should for this setup. I just can't stand how it performs on the highway. Around town it's actually great. The bigger problem is, I live in Florida and all the road trips I take, are 10+ hours away. I carry a lot of overlanding gear on those trips. If I lived somewhere like Boone, NC this wouldn't be an issue. lol

[@JTRSpartacus]

@@thetrailaheadofus you shouldn’t be at 3,000rpms at 70mph with the 8 speed. I’m at 2,500 with the manual in 6th. Have you tried manually shifting to 8th to see what the rpms are? Something is wrong. I recommend going to a different shop to diagnose the problem. It’s not 5.13 gears and going to 4.88 will only reduce about 5% or 150 rpms but will lighten your wallet significantly.

[@thetrailaheadofus]

@@JTRSpartacus 3.6. 5-speed.

[@JTRSpartacus]

@@thetrailaheadofus ohh. Sounds like you have a JK Wrangler Rubi with a 5 speed auto? That’s an entirely different thing and 3,000 rpm at 70mph might be around the ballpark with 5.13 gears since the 5 speed auto overdrive is about 0.83:1. purperformance.com/p-29669-rpm-calculator.html

[@stevebryant1035]

I would have liked to see the difference with a trailer. Around town without a load on the truck is minimal.

[@JTRSpartacus]

I’m not against this but there would be some logistics involved. Ideally we would need two trucks in the same place, same loop, same trailer. (Blake lives in Canada 🇨🇦 and I live in Pennsylvania 🇺🇸) we would need 1 with 5.13s and 1 with 4.88s. I’m open to a collaboration and have a trailer we can load up if anyone in the Southeast PA, DE, MD, South NJ area has a manual Gladiator on 37s and 4.88 gears. Thanks for watching and commenting. #JTRSPARTACUS

[@simoncharest7620]

hello, congratulations on your good work, thanks to you the consumer is carefully informed. now i have an ambiguity for the ratio of my gladiator rubicon, i live in quebec in canada, my job is snow removal with tractors, for moons, everyone knows that a jeep is superior to a truck. I want to install a front plow to push snow. in the summer I have a boat that weighs 3000lbs, I am often on the road for travel, my top speed here in Canada is a maximum of 120 kilometers per hour. what would be the best ratio for my utility, the ideal for me is the maximum of force and power while respecting the speed of the engine at approximately 1700 revolutions in 8iem clutch. thank you !

[@JTRSpartacus]

It really depends on what size tires you are running. If you are running stock size tires the stock 4.10 gears are just barely adequate with the manual transmission. You may want to look at 4.56 ratio gears for stock tires and plowing. If you go to taller say 35” tires you may want to go up to 4.88 gears but even 4.56 ratio gears will be better than stock. Be sure to buy quality gears and use an experienced mechanic. Thanks for watching and good luck! #JTRSPARTACUS

[@MidKnight2142]

Btw (I'll try to correct this later if I'm wrong), but my Stock JT Rubicon manual is maybe at 3200-3300 RPM in 4th gear at 60mph. I haven't bothered looking at oil pressure though. EDIT: Numbers were wrong, see the updated numbers below, if you're curious.

[@JTRSpartacus]

Seems a bit high for stock gears and tires in 4th gear. Oil pressure goes up when over 3,000 rpms. Not sure it’s a big deal unless you run like that for a long time. Like everything. YMMV. Thanks for watching! #JTRSPARTACUS

[@MidKnight2142]

@@JTRSpartacus You're correct, they were too high lol. It was actual about 2600rpm at 60mph and about 32 for the oil pressure. The number I was thinking of was 4th gear at 75mph, that was closer to 3200rpm.

[@aemsmdhxraysection1318]

i love the way you guys do the real world comparison but, i'd like to ask regarding the road you guys are taking. . was it uphill or on level surface? thank you !! more power!

[@JTRSpartacus]

Almost no true level spots where I live in Pennsylvania can’t say for my colleague in Canada. In PA it’s small hills that go up and down and average out. Not scientific but a decent comparison if I do say so, myself. Thanks for watching. #JTRSPARTACUS

[@antoniohernandez7171]

Bro during the 500 mile break in period, do you stop every so often to allow the axles to cool down?

[@JTRSpartacus]

Yes. No toeing, varied speeds, no high sprrds/high heat. The gear manufacturer has guidance. I followed it to a tee and changed the diff oil after 500 miles. Thanks for watching. #JTRSPARTACUS

[@DerrickOil]

Nice comparison, didn't see much of difference until North of 75 MPH (120 KMH). Btw, got any merch?

[@JTRSpartacus]

Thanks for watching. I’ll have some Centerforce stickers a d a Centerforce t-shirt to give away for that video. Hit the notification bell 🔔 for updates! #JTRSPARTACUS

[@lawnews]

great topic, thank you. will be upping to 37's and needed this info--basically, not much difference but as long as pricing is similar i think i will opt for 5.13

[@JTRSpartacus]

I believe the prices were basically the same. You’ll love 5.13s with 37s!!! #JTRSPARTACUS

[@andrewbouffard6118]

Nice vid! Any concern with the clutch recal? With regearing?

[@JTRSpartacus]

I did the Centerforce clutch because the factory clutch was woefully inadequate and I didn’t believe (and still don’t) that Jeep would make it right. This replaces all the faulty components with hood parts so zero worries. Thanks for watching! #JTRSPARTACUS

[@marcnunes6916]

Something to consider with the manual. First gear in 4H is awesome maybe better than AT but 2nd gear feels tall in stock form. If you like to air-down tires, 37s might be better off with the 5.13?

[@JTRSpartacus]

2nd gear is a bit tall on the manual. In 4wd low, I can put in 2nd and crawl up a 20degree hill without giving it any gas.

[@sellickusa]

Great comparison

[@JTRSpartacus]

Glad these are useful. Thanks for watching!! #JTRSPARTACUS

[@Kissfan113]

How is your takeoff with the 5.13s, I have a 2023 Willys Sport, and the take off is horrible, stalls easier than a mid 90s ford escort, reverse up hill or out of a hole is nearly impossible without side stepping the clutch, and i really have to feather the fuel in 1st to get going

[@Kissfan113]

Also Im on the factory 255 tires and 3.73 gears

[@JTRSpartacus]

Take off is much better with 5.13 gears and 37s. It’s not fast but it is responsive. If it’s flat I can take off in 2nd gear ⚙️. Thanks for watching. #JTRSPARTACUS

[@irvingmorales5855]

Woowww finally the video that I was looking for, great video, very informative and excellent explanation !!!!! do you think that it can be the same results with my jk 2014 6speed if I switch to 5.13 ? I don’t know the difference between JL 6 speed and JK 6 speed, thanks a lot for amazing video

[@JTRSpartacus]

Different transmissions, with different ratios so it will be a bit different. The basic ideas is similar. The JL Wrangler and JT Gladiator use an Aisin D478 trans with these ratios 1st - 5.13 2nd - 2.63 3rd - 1.53 4th - 1.00 5th - 0.81 6th - 0.72 Reverse - 4.49 The JK Wrangler uses the Daimler NSG370 manual transmission. 1st 4.46 2nd 2.61 3rd 1.72 4th 1.25 5th 1.00 6th 0.84 Reverse 4.06 Good luck ! #JTRSPARTACUS

[@irvingmorales5855]

@@JTRSpartacus thank you so much really appreciate it!!!!!!!

[@blakemarchand6650]

Will re-gearing to 4.88 gears through a code or check engine light on my dash ? Do you have to re-flash the ecu?

[@bbannongmu]

You’ll need to get a Tazer or other programmer or have a dealer reflash to correct the Speedo. There is also a relearn procedure - basically drive 20 seconds in 6th while accelerating - I have another video on my channel of this . I have a Tazer mini programmer. Good luck! #JTRSPARTACUS

[@JTRSpartacus]

Relearn for manual trans is here kzbin.info/www/bejne/d5eTgpufbNyGeNUsi=pwZwAAan-Uvbz5Ce if auto trans - there may be something different.

[@carlosmaldonado9510]

This was great 👍

[@JTRSpartacus]

music credit - Heroes Redemption kzbin.info/www/bejne/g3rdg4apjNKspLM

[@JackMonkeyOverland]

what was your gas mileage at these speeds? Any noticeable difference when you went from 4.10 to 5.13? Not that I bought my jeep for gas mileage, but I like to get the best I can out of it. Thanks brother!

[@JTRSpartacus]

I get about 14mpg cruising around in rural, hilly PA. I drove out to Yellowstone and back and averaged 15.6 mpg with a crap ton of gear, my son and me. Thanks for watching. #JTRSPARTACUS

[@JTRSpartacus]

Oh. My mileage with 4.10 was a little worse 13 ish - got a little better with the gear change. Life, towing, off roading got a lot better.

[@steamman9193]

Yeah this is exactly why people should opt for the 8 speed auto. My sport on 33s can cruise at 80mph on the interstate at 2100rpm and get 20mpg. Bigger tires? 7th gear and 37s run an almost identical final ratio to stock and you still have another gear over the manual option. Plus the auto is so fast on a gearshift your always in the right gear for the situation

[@JTRSpartacus]

Thanks for watching. To each their own. Everyone should buy/build what works best for their lifestyle and needs. The auto is nice and smooth but I enjoy rowing my own gears and used the $2k I saved to buy mods. #JTRSPARTACUS #savethestick

[@chanerx]

Problem with the auto is it will not let you slip down to a lower gear manually at times when you need it due to preventing from reveling up engine too much and only goes up to a certain RPM on its own. Manual is nice to just release the clutch and Krawl away.

[@jbann4300]

Cool

[@JTRSpartacus]

Thanks 🙏. Appreciate the support!

[@johnniemeyer3139]

Awesome video!!!

[@JTRSpartacus]

Thanks for watching! Glad you enjoyed it. #JTRSPARTACUS

[@St.PierreProductions]

So for 38in tires, do you recommend 5.13?

[@JTRSpartacus]

Probably be ok. For auto trans 5.13 will likely be great for 38s. Depending on the tire weight and your use (especially if towing) you might want to look at 5.38 gears for manual transmission. Thanks for watching and good luck! #JTRSPARTACUS

[@kentleclair9939]

What’s your average MPG with 5:13’s ?

[@JTRSpartacus]

Getting about 15.6 mpg calculated by hand in back road/hilly local driving. About 1 mpg less thank stock 4.10 and 33inch tires. Display is showing 16mpg so it’s not that far off. Thanks for watching!

[@jamesbarnett4166]

Did you also GPS the speed ?

[@JTRSpartacus]

We both previously calibrated our speedos with Tazers and checked against GPS.

[@christinabruce5660]

Does it feel different?

[@JTRSpartacus]

THANKS for watching and for your comment. It does feel different. 5.13 gears feel so much more powerful than the stock 4.10s with 37” tires. I got 5th and 6th gear back. It was a dog on the highway and trail with stock 4.10 gears. Checkout the first tow video for an example kzbin.info/www/bejne/sGiXpJ1mbNGWars #JTRSPARTACUS

[@JTRSpartacus]

If the question is do 5.13s vs 4.88 feel different. I’m not sure. Probably at least a little bit. Blake is in Canada 🇨🇦 and I’m in Pennsylvania 🇺🇸 so this was a virtual collaboration. I’m open to doing a back to back in person comparison if anyone is in the PA, DE, MD, Southern Jersey region with a manual JT, 37s and 4.88 gears.

[@christinabruce5660]

Ok. Cool, good to know. Our family is new to the Jeep family and we got a 2021 manual rubicon gladiator. Weve done nothing yet because we just dont know anything and I was curious. Just myself, I'm a short lady so I've never really driven a manual pickup before this jeep. I'm pretty good with any manual sedan, but this truck is definitely taking me some time to get accustomed. We live in Hawaii so not much opportunity to get above 50mph so I find myself most comfortable really around 3rd gear. I like to keep rpms around 2000at most for manual sedans, but it's not as natural or easy in this truck. My husband does the driving when we go offroad, lol.

[@JTRSpartacus]

@@christinabruce5660 thanks for watching and welcome to the Gladiator obsession OlllllllO!!!

[@jerryjohnson7348]

My gladiator has 3:73 gear ratio

[@JTRSpartacus]

Stock 3.73 gearing is probably ok for stock tires. The 3.6 Pentastar V-6 has no down low torque so more aggressive gearing helps with towing, off-roading , etc. thanks for watching. #JTRSPARTACUS

[@GwynethDawn]

Yall lets be honest, with 5.13s every gear is a tow gear😂

[@JTRSpartacus]

😂 funny but the difference between 4.88 and 5.13 is only about 5%. I have no problem cruising at 80mph on the interstate in 6th gear and I can rock crawl in 1st gear in 4 low at 1mph. Different strokes, for different folks. Thanks for watching and commenting! #JTRSPARTACUS

[@GwynethDawn]

@@JTRSpartacus yeah, I swapped from 4.10s to 5.13s in my 89 f350. It's got a zf5 and a 460 sitting on 35s. We use it to haul hay and farm equipment and that 10% difference is huge when it comes to towing heavy. Where the 4.10s you were safer just staying in 4th and hanging between 55 and 60 mph I've cruised in OD at 65 with 15k worth of hay on the gooseneck and she handles it so much nicer now.

[@JTRSpartacus]

@@GwynethDawn nice! a 460 is 2 cylinders and a little over twice the size of a 3.6liter Pentastar v-6. A Gladiator (especially mine at almost 6,000 lbs…) needs gearing to make up for the wheezy, low torque v6 and the double overdrive makes it work on the highway. Thanks!!

[@scottChapman25]

Not much

[@stephencarbajal5657]

RPM-revolution per min not revolution per minutes. 🤦‍♂️ good comparison otherwise 😂

[@JTRSpartacus]

Doh ! Thanks for the correction. I know that but It’s pretty easy to mess up. Thanks for watching !!! #JTRSPARTACUS