Regear Help Needed

Hey everyone, I’m looking to regear my truck soon. I’m on a 4.5” and 35s. I commonly tow a ~9k lb boat, usually short distance, and once a year take it on a long trip ~300miles. Short distance is fine, but when towing on the highway it sucks. Sits around 3k rpm at 65mph. I’m running OTT tune as well. Hoping a regear will help this. What do you recommend going with for ratio/brand and why? Also should I do an e-locker. I don’t ever off-road so I don’t feel it’s necessary but im open to suggestions. Thanks!

 

5.29’s and don’t look back. I didn’t do an lsd or locker on mine and have no regrets 2yrs later. Call up Keith @dirtydeeds and he’ll set you up with everything you need.

 

4.88’s and a Powertrax limited slip. Just cuz everyone else will say 5.29’s and I like to buck the trend like that…

Or just supercharge it. That’s usually the best answer.

But serious about the Powertrax limited slip. It’s fantastic for road use and especially boat launches, but does well in the dirt if needed. While you are in there, might as well.

 

The only regret you will have doing 4.88, is that you almost had the right gear ratio. All you’d have had to do is get 5.29 and they would’ve been perfect. Otherwise, if 4.88 was your only option, it’s better than stock. But 5.29 is better than 4.88 in every way, with zero downsides.

Supercharged or naturally aspirated, 5.29 is the recommended gear, this is coming from a guy whom has regeared hundreds of tundras over the last nearly two and a half decades. Take this advice with a grain of salt

Feel free to give a call if it helps. There’s a lot more to why 5.29 works better than meets the eye. 760-877-4234.

 

I went with 5.29's for the added benefit of reducing stress on our transmission. The aB60 needs all the help it can get.

 

5.29’s and either the speedmaster or powertrax, for the performance, and upgrading the poopy stock single cross in carrier that will fail at some point.

 

I did 5.29's with a powertrax lsd in the rear and eaton e locker in the front. If you dont off road just go with the powertrax alone.

 

5.29s and 35s here.

I had to argue with several shops to go 5.29s over 4.88s and very thankful I did. I listened to Dirty Deeds.

 

5.29 All day!

 

I would not be worried about 3k rpm while towing at 65mph. It's just into the torque and power curve and you can see the load values there vs lugging it. It's happier in the higher revs.

The regear will increase your RPM by a few hundred RPM, but the load value will reduce another 20%. I'd rather 50% rpm at low load than 30% rpm at 90% load. 5.29s also stop almost all gear hunting, while towing, because of those load values.

 

I agree with you except for the skipping of the traction assist. Especially on a boat ramp with 9k lbs coming up a wet ramp.

I'm only saying this because I used to have to use 4x4 just to get into some campgrounds that had dirt roads. Powertrax resolved that and it was a "while they're in there" cost of just the part.

 

No boat. No problem.

 

Sounds like 5.29s and a powertrax rear lsd is the way to go. I failed to mention that on the highway doing 65-70mph at 3k rpm if I feather back the throttle I can get it to shift into 6th gear (I think) and comes down to about 2.3k rpm’s , but if I give it any throttle, it drops back to fifth and 3k rpm. To my understanding this would be called gear hunting, and the regear would help that.

 

So Regear will slightly increase rpm’s, what do you mean by load value? And do you mean 50% higher or lower rpms? My apologies for not understanding!

 

I drag a 8500 pound 5th wheel RV 2x per year over 750 miles one way. I'm in 4th the entire time. The truck has no issue with 3k rpms. I'm on stock 4.3 gears. The truck just guns and runs cool spinning the coolant at those engine speeds. Tires are standard, but you really don't need to worry about those rpms.

 

Rpm is self explanatory, except it is just one metric. How hard it is working at that RPM is the load value. You'll hear it in exhaust note more than you'll feel it, but if you are monitoring your values via any of the apps/obdII dongles, you'll be able to see it.

The higher the RPMs, the more into the power/torque band you are. You'll be amazed at how high in the rpm range peak values are. These engines aren't afraid to rev.

Think of it like hiking up a mountain (low rpm, high load) vs power walking on a flat road (higher rpm, less load). Faster isn't always harder on things.

I'm sure someone can explain it more, but I hope that helps. Also, if you can, tow in S4 to keep the torque converter locked. It'll keep the trans cooler.