Gear ratios 4.10 vs. 3.73

4l80t Gear ratio change 3.73 to 4.10 gm 14 bolt rear differential 11.5 in full flow vs 9.5 semi float 2000rpm=62mph with 410

[@laynen6891]

I custom ordered my 2005 GMC sierra 1500 hd through our local dealership. I opted for the 4.10 ratio rear gears and a 1 inch lift and some other performance components from higher grade heavy duty models. I was once towing a load over the capacity the truck has by two thousand pounds and the truck took it no problem.

[@squealthewheels3090]

I'm pretty for sure GM underrated the trucks in our years and models. I've only been close to Max load once that was with a 373s. Me and the truck is much happier with 410.

[@SAUDI2]

Mine is 2500 HD. Not use it for towing it all. But need to improve the performance in town and highway. Need to lower the RPM and fuel consumption. Will this works?

[@themichaelholdren]

Dude, I have a 4x4 1500HD also (2003) and am doing the same swap to a 2500HD rear axle (I also have a 3500 rear axle, but will save that for another project). You're looking at the wrong towing capacity in your manual: you need to be looking at the 4wd ratings, not the 2wd ratings. The 4x4 trucks have more weight on the truck (on the front), so the CGVWR is lower. Also, you're ignoring the frame different between the 1500HD and the 2500HD trucks. The 2500HD is taller and stronger from the rear axle to the bumper. This makes a difference in towing capacity as well. You're not going to see 2500HD towing capability just by swapping the rear axle.

[@squealthewheels3090]

My exact model is not in the manual?I tried to match it up the best, wanted to show how the numbers change with the gear ratio.Im thinking the 1500hd frames are the same as 2500 none hd.l was prark next to one and they both have the neck down back half frame thing.my truck has lots of payload for my set up any way just wanted 4.10 for the hills.

[@themichaelholdren]

@@squealthewheels3090 Yeah man, the 1500HD is identical to the 2500 non-HD. In the manual (2003 GMC Sierra, page 4-78) it's called the "K-2500 LD (4WD)" model.

[@al-mubdizahir8704]

What was that total weiyht you was pilling including that travel trailer?

[@vinnieortega]

I have a 2010 silverado with a 4.8 and stock gears 3.42 with 285s and leveling kit, it struggles towing my 18ft travel trailer and 2 dirt bikes. I am swapping to 4.10s next month

[@squealthewheels3090]

Yeah that should help getting up the hills with loaded trailer.is it a 4 speed transmission?

[@vinnieortega]

@@squealthewheels3090 yes 4 speed. Looking forward to the improvements

[@moejr14]

@@vinnieortega did it help towing?

[@vinnieortega]

@@moejr14 as a matter of fact in taking my travel trailer out for the first time this weekend. The truck already performs so much better with the gear swap. I'll keep you updated

[@moejr14]

@@vinnieortega did you regear or swap the hole axle out? Also did you have to reprogram the computer to get it work with 4.10

[@molinashoundgt5981]

How much did his impact your highway and top speed without red lining the shit out of your truck?

[@hotrod6919]

Alot of work on a 4x4 going 3.73 - 4.10 with the tq and power engines in last 20 yrs produce gearing isnt really a issue with towing and racing these days Smaller tires would do the same but now look at my 03' F-350 psd has 3.73s with big 38''x13.5'' on 16s im at the limit for running tall 3.73s but if i did gear swap id go to 4.56 even though 4.30 would bring gearing back close to factory calibration and on my 99' ls1 6 speed camaro i ran several different gears on the track from 3.20 3,42 3.73 4.10 only difference was fuel economy, shifted slightly diff rpms and only gained 1/10th of a sec on my quarter mile times overall

[@squealthewheels3090]

Yeah a lot of new trucks come with 10 speed transmission.I would have thought the camaro would pick up more et than that.slips dont lie

[@hotrod6919]

@@squealthewheels3090 basically 4.10s i had better 60 foot but traded off higher trap speed and that was stock t-56 2.66 gears now im running The 2.92 zo6 gears so 4.10s would be tough Rowing fast be in 4th at the 60' lol

[@fransiscoh9450]

Hey man i dont knkw much about gearing and i have a 4l60 4.8 silverado. Its my daily which i drive on the freeway a lot and all over the place but i also like to race it and its low end gearing is trash! what gearing do u recommend in my circumstance? 373 or 410?

[@squealthewheels3090]

I would say its the 4.8 you need all help you can get 410. Might be too low if you have small tires.

[@slicenrice9236]

Sounds like a chill version of Lil Yachty.

[@SAUDI2]

Mine is sierra 2005 HD. With 4.10 gears. This burn much gas and slow in road and hight torque. What do you recommend to improve its performance and economy?

[@squealthewheels3090]

Nothing big as for in economy department.more like efficiency.3.73 with 295 tires is something like 3 to 4 inches taller thant stock.which is why i like 4.10s.untill i want to haul ass on freeway then it gets thirsty.

[@squealthewheels3090]

If the truck is stock start with,intake headers exhaust or handheld computer tuner. Once you go past that you reach a point of diminishing returns. You'll have to put bigger injectors once you start making more horsepower than factory settings.

[@FluffyHawk13]

Want to regear the differentials on my 08, V6 AWD Grand Cherokee...3.73 to 4.10s. Do I have to regear my transmission and transfer case as well? I'm thinking I'll be fine with a tire size of 265/70/17s.

[@squealthewheels3090]

No t-case or tranny just differentials.I thought about doing the gears swap,but complete used differentials was cheaper and easier swap in.

[@FluffyHawk13]

@@squealthewheels3090 Thanks!

[@scotsmun7993]

My son and I pulled the 373 out and put a 410 in rear and front just like you did on a 1500 Hd 6.0 liter . Ring gear was 9.5 “ . We installed front and rear 10.5” ring gear 410 FF . Performance improved but we are going to replace the Transfer case . Did you run into any issue with that?im wondering if we should install a different model transfer.

[@squealthewheels3090]

My truck is 1500hd to, we have the 246 transfer case I believe 4 button clutch pack Style. Mine has transfer case pump rub, it still works good. I'm probably just going to do a back half rebuild when it's time. If I was going to swap it I would get one form 4l85 transfer case it's behind the 8.1 blocks,246x 3 button case if memory serves me correct

[@squealthewheels3090]

I had to shorten the drive shaft by 3 inches at my local driveshaft shop redid the carrier bearings to while I was there. If you didn't shorten a driveshaft that could be pushing on the transfer case Under full load

[@scotsmun7993]

squeal the wheels yes have the 246 and that’s exactly what we had to have cut off at a drive shaft shop . The TC was having issues before the mod. By not going into 4x4 when selected and sounding like its got a handful oF pennies inside . The 410 FF came out of an 03 GMC 2500. We trying to figure out if we should go back with the 246 or different model TC . The present one has about 220k miles on it .

[@squealthewheels3090]

It sounds like it might be chain slack inside the transfer case but before I would swap that I would check the front differential actuator solenoid, and the buttons on the dash.

[@delvickbrown7684]

Hey so did u have a 3.7.3 rearend

[@moejr14]

Any heavy loads with the 4.10s yet?

[@JasonY02]

It pull good ? Do you like the 5100 bilsten shocks ?

[@haydennorman9742]

I have an 03 2500hd with the 5100's and they're great

[@markbroad119]

Front gears?

[@Kcducttaper1]

I'm debating swapping my F-250's 3.73's for 4.10's as well when/if I put a locker in it. How does it pull now? Does it pull notably better?

[@squealthewheels3090]

It does pull better, you won't notice a difference around town until you put trailer on. going uphill and especially down hill is were you will understand the difference. Assuming you have the gas engine?

[@alb12345672]

I have an older explorer with the 4.0 OHV and stock 4.10s. I can say 4.10s maximize torque and off the line acceleration. Even though it it is only a 160hp v6 (but relatively high torque) it really pulls. Downside is it is going to rev high past 60Mph and waste gas. The engine must make 4.10 revs to spin the tires one time. About 10% more than the 3.73. It will not like to go fast, because you are going to rev out of the power curve.

[@squealthewheels3090]

Yeah sounds about what I've seen myself.I go a little slower on freeway to keep under 2200 rpm =around 70 mph.

[@alb12345672]

@@squealthewheels3090 On the other hand I have a Grand Marquis Geared with 2.73's :lol:. If you go over 2000RPM on the highway you are likely driving recklessly :lol:. It can get high 20s MPG on flat roads because the engine is doing no work. That can contribute to longevity as well. However though, it Seems like it "works" hard to accelerate. Not that it its not powerful, but like turning a bolt with a small breaker bar. On the explorer I think I'm over 2500 at 70. It only has 16" tires (some came with 15"). As you can imagine not much passing power....

[@stacyrethman8675]

Kc, i am also looking into 4.10 in my 99 f250 powerstroke. I really think this will improve my bottom end and even MPG

[@moejr14]

Do you have to get the computer / transmission retuned to shift properly after the gear swap?

[@squealthewheels3090]

Short answer is no.If you dont the speedometer will be off.With big chang in gear ratios you might have to. The computer uses speed time miles per hour to shift.

[@bradymiller6748]

Good video but that Cr250 and odyssey maybe?are super sweet

[@squealthewheels3090]

Thanks the 250r was my first big purchase.

[@pinhead2128]

Thats a atc 250r banshee killer

[@squealthewheels3090]

@@pinhead2128 yeah its ported high compression with bigger carb,it will get the banshees,I lost to one that was boried way out an running alcohol

[@bubbaa74]

Your wrong the 1500 hd IS NOT identical to the 2500hd

[@dan3510]

4.10 may burn more gas, but now there's less stress on the entire system

[@squealthewheels3090]

Yes exactly. I noticed the brakes last longer too. you get to your desired speed faster then you get to let off the gas pedal sooner.

[@vinnieortega]

Exactly. I recently swapped mine and it's way better. The engine works less and it shifts smoother on the get up and more torque. I have 285's and cruise at 75-80 on the freeway at 2500 rpm

[@dan3510]

thankyou for this detailed info! This is how you make a video! Now.... lets talk about those other toys!

[@squealthewheels3090]

Your welcome. Far as the other toys I got to go through and clean all the carburetors and get things ready for the summer. Eventually I want to get GoPro and do some ride video's.

[@paulreints2279]

4.30 rear gears stock in my Tundra. Nothing else like it.

[@squealthewheels3090]

Yeah 430's is Sweet Spot ratio. If my truck had Allison 5-speed or 35s I would have went with 430s, options are limited on 11.5 inch ring gear in my setup. I heard the Tundras you can order a 5:10?

[@paulreints2279]

@@squealthewheels3090 I'm not sure you'd ever find a need for a 5.10, but it would be a fun ride! I run a lawn care business & use my Tundra to haul an enclosed trailer daily, plus a dump trailer quite a lot. I've never owned a more powerful, perfectly-geared truck. Plus it screams when you feel like being stupid. I have a 6.0 LS 2500 plow truck too, which is no slouch, but nothing compared to the Tundra. I believe that's got 4.10 rear gears. Nothing more fun than a powerful truck!

[@squealthewheels3090]

Toyota trucks are pretty solid. I drove a 09 Tundra on a road trip. It would roast the tires them off of the stop sign. My truck needs a good tune hopefully it'll spin the tires. What's the fuel mileage on your tundra when loaded?

[@paulreints2279]

@@squealthewheels3090 well, not good. Maybe 16mpg if I'm not towing & I drive easy. Probably 14 mpg average... worth every penny

[@omen2098]

4.88 6 speed manual 7.3 not even a chance

[@gerardojuarez6938]

So which one gives more horsepower? 3.73 or 4.10?? What are the pros & cons

[@squealthewheels3090]

Gear ratios don't give horsepower,4.10 reduces The Strain on the drivetrain allowing higher payload numbers.4.10 accelerate faster 0-60 mph vs 3.73. If you like to go fast on the freeway 308 323 373s.now with 4.10s i keep under 70mph 2100rpm on freeway,373 would do 80-85mph 2000-2200rpm

[@gerardojuarez6938]

I heard 4.10 gears are good if your going to turbo your truck/car. Am I right or wrong

[@squealthewheels3090]

Tire size and how many gears in transmission is going to play a big effect on what gear ratio is going to be best. Single or twin turbo matters as well. If it's not spooling up fast put a lower gear. If it's blowing the tires lose off the line put a taller gear.

[@isaacvasquez541]

squeal the wheels what do you recommend on a 2006 Silverado 5.3 built trans believe 4 speed and stock 3.73 gears but I’m on a like 4-5 in lift and 22x12 on 33s

[@squealthewheels3090]

4.10 would work good with your current tires and rims 33's, with a 4 to 5 inch lift you might be able to fit 35's under?then you might want 4.30 ratio.if its 4x4 you want to get it right the first time.

[@tylerdunn6578]

1500 is not the same as 2500 there is a difference nice ride though

[@squealthewheels3090]

1500hd

[@MagicMike007]

1500 Hd is Not the same as a 2500 Hd. I know because I own both.

[@squealthewheels3090]

What is different,i think the back half frame.

[@MagicMike007]

1500 hd frame is a little lighter, the rear is a semi-floater not full-floater, the rear springs are smaller and the rear center section is smaller.

[@squealthewheels3090]

Yeah i was talking about a straight 2500 not the 2500hd.my truck has 5 leaf rear sping pack, not sure how stiff.I did add Timberman spring helpers.

[@diablocustomschoker2058]

Talk to much and say litlebit 😐

[@thomastessin1663]

Snoring.

[@longjohn725]

Gear ratio are like sex.

[@squealthewheels3090]

Yeah easy and complex at the same time

[@MrBillybilly28]

@@squealthewheels3090 😂