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No limited slip diff, but I want one!

T

Theiskell

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I’m certain this question has been asked repeatedly, but my Google skills are lacking, and I’m getting older, so I’m reaching out here.

I have a 2024 Night Edition Cummins 2500 with a standard axle. If I had known that when I bought it, I wouldn’t have. Now, my mistake is going to cost me. I’ve built several hotrods over the years and have a well-equipped shop. However, I’ve never trusted myself to set up a rear end.

I’ve noticed several low-mileage full rear ends with limited slip and a locker on eBay. I’m not sure if they’re actually LSD and a locker, but that’s what they claim to be. I’ve also looked for aftermarket drop-in solutions, but I only see either LDS or a locker, not both, to fit my housing.

I really want both, so is there a drop-in option for the 11.5-inch differential I have, or do I need to buy the factory 2500 rear assembly?

I hope this makes sense.
 
I’ve never seen a combo. It’s either limited slip or locker. There are drop in lockers available. They just replace the spider gears. Check out PowerTrax by Richmond gear. Don’t know if they have one for that diff.
 
Seems like I read that the newer (?2022?) PowerWagons and the Rebels started using the same rear axle as the 4.5 gen 2500s but with the locker. The older PW used a different 11.5”. I think the 4.5 gen regular 2500s use the same axle housing as the 3500s but with a 11.5” ring gear.

If that’s true then a PW/Rebel rear axle might be a good option to get both a LSD and Locker.

I still haven’t done anything to my truck and it has the factory LSD.

AH64ID

Post in thread '19-up gears'

MDethloff said:
We primarily worked with the Power Wagons until a few years ago. I believe that the old 11.5 has been maintained under the Power Wagons so that the locker machining/wiring/install did not need to be redone on the new axle. The new 11.5 was most likely done for weight reduction or some other purpose. The new 12.0 may be out of a concern that the 11.5 did not meet their minimums for the HO torque/power.

It is interesting that there are three concurrent axles, but that is what we're seeing. We had a 21' Power Wagon, and 19' 2500 Cummins, and a 24' 3500 HO Cummins next to each other in...
Click to expand...

AH64ID

Post in thread 'Official 2025 Ram HD'

regal2800 said:
unless it’s only available on the gas trucks with the old 11.5 rear axle. Some of these videos of the 2025 show a “axle lock” button on the 4x4 switch set and some videos show the regular 4x4 switch we currently have. Hard to tell what’s going on with the rear locker or what HD truck they would come on.
Click to expand...

The guide has been updated since yesterday, and now shows separate locker configurations for Rebel (rear only) and PW (F/R).

neoprufrok said:
Not sure this guide is right.. it says all models standard V8?
I've been told by one of the AEV guys that air level will be available for the 3500 -...
Click to expand...
  • Like

D

Post in thread 'REFERENCE: 2019+ Power Wagon Armor'

I wonder if this updated PW rear axle can be used in a 2019-2022 Ram 2500?

Another option would be swapping this newer selectable locker into my rear axle.

E

Post in thread 'Rear anti spin'

dieselscout80 said:
I have 4.10s in my NON power wagon Ram 2500. I wonder if a power wagon rear axle could be swapped in to my truck?
Click to expand...
Yes, I think it is relatively bolt in. but.
You will need to figure out how wire the locker in manually (using aux switches). And it won’t be cheap.
  • Like
 
Last edited:
Theiskell said:
I’m certain this question has been asked repeatedly, but my Google skills are lacking, and I’m getting older, so I’m reaching out here.

I have a 2024 Night Edition Cummins 2500 with a standard axle. If I had known that when I bought it, I wouldn’t have. Now, my mistake is going to cost me. I’ve built several hotrods over the years and have a well-equipped shop. However, I’ve never trusted myself to set up a rear end.

I’ve noticed several low-mileage full rear ends with limited slip and a locker on eBay. I’m not sure if they’re actually LSD and a locker, but that’s what they claim to be. I’ve also looked for aftermarket drop-in solutions, but I only see either LDS or a locker, not both, to fit my housing.

I really want both, so is there a drop-in option for the 11.5-inch differential I have, or do I need to buy the factory 2500 rear assembly?

I hope this makes sense.
Click to expand...
I had a Detroit Truetrac in my 2005 Ram 1500. It was the best of both worlds, "automatic locker". Had great traction on and off road.

This link may not be the exact part # but I'm willing to bet they make one for our trucks
www.summitracing.com

EATON 915A568 Eaton Detroit Truetrac Differentials | Summit Racing

Free Shipping - Eaton Detroit Truetrac Differentials with qualifying orders of $109. Shop Differential Carriers at Summit Racing.
www.summitracing.com www.summitracing.com
 
motorhead426 said:
I had a Detroit Truetrac in my 2005 Ram 1500. It was the best of both worlds, "automatic locker". Had great traction on and off road.

This link may not be the exact part # but I'm willing to bet they make one for our trucks
www.summitracing.com

EATON 915A568 Eaton Detroit Truetrac Differentials | Summit Racing

Free Shipping - Eaton Detroit Truetrac Differentials with qualifying orders of $109. Shop Differential Carriers at Summit Racing.
www.summitracing.com www.summitracing.com
Click to expand...
@Theiskell This is what I put into my 2022, I did the same thing where I bought the truck and realized that it was an open rear end, which here in Missouri can be a fun time during winter. The Truetrac I put in has been wonderful to me so far, about 10k miles on it and no issues.
 
Our 2024 Ram 3500 4x4 Cummins has the rear LSD here in the Rockies. It gets stuck in winter coming up our private steep road grade. Our 2016 Ram Power Wagon comes to the rescue. Get the rear LSD with the locker.
 
Last edited by a moderator:
Thank you all for the replies, If it's possible I really want to stick to a LSD and locker. Ive had LSD's in the past and like them but there are those moments. So what is the likely hood of being able to install a rear out of the rebel or power wagon without needing to fab elaborate brackets and so on. The full rear ends on eBay look like they just drop them out of these trucks complete. I dont mind paying the money IF I can do this like the factory. Im not a fan of cobbling things together. I would just go with the drop in LSD chunk in that case.
P.S Wiring a switch for the locker Im pretty sure thats within my wheel house.
 
E-Dub said:
@Theiskell This is what I put into my 2022, I did the same thing where I bought the truck and realized that it was an open rear end, which here in Missouri can be a fun time during winter. The Truetrac I put in has been wonderful to me so far, about 10k miles on it and no issues.
Click to expand...
Did you do the install yourself or farm it out?
 
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