4.88 vs 5.13

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Truckin Redneck
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4.88 vs 5.13

Post by Truckin Redneck » Thu Oct 14, 2021 5:30 pm

So I am going to to be regearing soon. I have a 15 PW and am swapping to 37s. I tow a ton, three days a week on average. Located in montana I do have a little altitude to deal with, also interstate speed limit is 80MPH. I was wanting to talk to those who have swapped. What do you like? Would you have gone lower/higher? Let me know.
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ScubaSteve
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Re: 4.88 vs 5.13

Post by ScubaSteve » Sun Oct 17, 2021 10:51 pm

I have 5.13's in my 2016 on 37's and its just about perfect. Almost a tad too low. 4.88's and 37's basically put it back where it was with 4.10's and the stock 32/33's.

Since you tow a lot, the 5.13's will probably be the better bet. Cruising at 65mph puts me right around 2000rpm and 80mph is pushing about 2400, IIRC.

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Mule
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Re: 4.88 vs 5.13

Post by Mule » Mon Oct 18, 2021 2:05 am

whatever gearing a 2500 cummins has might work better... :P

Towing is why i'm looking at a cummins for the next go-round. (Keeping the PW though.)

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TankerZak
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Re: 4.88 vs 5.13

Post by TankerZak » Wed Oct 27, 2021 10:50 pm

I just had 5.13s installed. I'd agree with ScubaSteve. I haven't driven much... but it MIGHT be a tad low... or it's perfect. If you tow a lot or might someday go to 40s I'd do 5.13 for sure. If not I might waffle... but I'm pretty happy with 5.13s. But towing uphill in 2nd gear at 35 mph getting 2mpg was gettig old on 37s with 4.10s. This should fix that. I'm already spending a lot more time in 6th gear when driving.
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Re: 4.88 vs 5.13

Post by jeep_boy02 » Wed Oct 27, 2021 11:45 pm

I'd be interested in hearing any 4G guys chime in. I'm considering 37s and wondering about towing with the 456s.

I know I don't want 513s but idk how noticable that small of a change would be.

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Re: 4.88 vs 5.13

Post by btsbarton » Thu Oct 28, 2021 8:09 am

Mule wrote:
Mon Oct 18, 2021 2:05 am
whatever gearing a 2500 cummins has might work better... :P

Towing is why i'm looking at a cummins for the next go-round. (Keeping the PW though.)
3.73s in 2500s with Cummins .
4.10s available option on 3500 Cummins.

It ain’t the final drive that gives Cummins trucks the grunt….

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Re: 4.88 vs 5.13

Post by RustyPW » Thu Oct 28, 2021 7:26 pm

I want 5.13's. :drool: But it's not going to happen with the 10.5 rear. :box: I would have to swap to the 11.5. :cash:
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