$1500 for a regear both axles.

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Bldrinker

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Dropping off on Wednesday afternoon hope to have it back Friday evening.

Fingers crossed I will be able to feel the difference.
 
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Bldrinker

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I got it back. In short if you guys have larger than stock tires and only go 4:56 you will be disappointed.
I can tell a difference but it is not night and day.
Maybe it will get better after break in maybe it will be more like impressive towing.
But as of now I’m not convinced it was worth the money. I have put 60 miles on it so that could change.

just giving honest first impressions. 8A9531E2-CB1F-40EA-A1FA-C0E6070917DD.jpeg
 

GsRAM

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I got it back. In short if you guys have larger than stock tires and only go 4:56 you will be disappointed.
I can tell a difference but it is not night and day.
Maybe it will get better after break in maybe it will be more like impressive towing.
But as of now I’m not convinced it was worth the money. I have put 60 miles on it so that could change.

just giving honest first impressions. View attachment 219861

Oh man, sorry to hear that. Your on stock tires, correct? Looks like its turning 2200 rpm at 73 in 6th? Seems pretty high? I believe my 3.73 geared truck is under 2k at the same speed.

Hopefully towing it'll be a big improvement for you! Give it some time. Mechanically, all is well at least?
 
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Bldrinker

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Oh man, sorry to hear that. Your on stock tires, correct? Looks like its turning 2200 rpm at 73 in 6th? Seems pretty high? I believe my 3.73 geared truck is under 2k at the same speed.

Hopefully towing it'll be a big improvement for you! Give it some time. Mechanically, all is well at least?
I’m in 34’s with 4:88’s. I knew the freeway was going to suck so that’s fine. I rarely drive it in the freeway empty.

Mechanically I think it’s ok. I might be able to hear a faint whine from the gears or it could be the change in noise due to RPM. Nothing a muffler or stereo cant hide.

As long as it pulls the trailer better it’s all good. Installer is recommending 1000 miles that probably won’t happen but it will be close. I really don’t drive it unless I’m towing or going hunting lol.
 

Toddz

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Glad you got it back and all buttoned up. The towing will definitely be the test as to whether you now got what you want.
 

Andy505

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I got it back. In short if you guys have larger than stock tires and only go 4:56 you will be disappointed.
I can tell a difference but it is not night and day.
Maybe it will get better after break in maybe it will be more like impressive towing.
But as of now I’m not convinced it was worth the money. I have put 60 miles on it so that could change.

just giving honest first impressions. View attachment 219861


If nothing else, your experience just conviced me not to change gears at all. Im running 3.73 with 295/70/18, driving and towing are tolerable. IMO, the worst thing is running 6th gear under 70.
 
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Bldrinker

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If nothing else, your experience just conviced me not to change gears at all. Im running 3.73 with 295/70/18, driving and towing are tolerable. IMO, the worst thing is running 6th gear under 70.
How heavy are you towing. I started with 4:10. You would definitely see a difference going to 4:88
 

silvrzuki77

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I am about to have my gears swapped on my 2018 Cummins. Huge shout out to C and M gears!!!! Only place that had factory AAM gears in stock!!!! I was getting worried!


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G. Mcpherson

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I purchased AAM gears and Parts from them. Good Pricing and service. Also quick response for any questions I had.
 

SRich2015

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I purchased my AAM 4.10's from them and drove 3 hours for them to do the Install. Very professional and knowledgable Guys. Took 7 hours to do front and rear!!
 
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Bldrinker

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I purchased my AAM 4.10's from them and drove 3 hours for them to do the Install. Very professional and knowledgable Guys. Took 7 hours to do front and rear!!

Dam that’s fast. Had to be more than one guy working on it.
 

SRich2015

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Dam that’s fast. Had to be more than one guy working on it.
Nope. just one guy!! That is all he does is gear installs!! Granted that at the time my truck only had 7,000 miles so it did not need all new bearings, etc. so I'm sure that made the job go faster!!
 
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Bldrinker

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Does anyone know if a 2018 requires limited slip additive? I’m getting a chatter during tight turns.
 

SRich2015

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Does anyone know if a 2018 requires limited slip additive? I’m getting a chatter during tight turns.

Shouldn’t, but it will not hurt anything to add some. What oil does it have in it?


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Bldrinker

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Shouldn’t, but it will not hurt anything to add some. What oil does it have in it?


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Hell if I know whatever the gear installer put in there
 

SRich2015

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Hell if I know whatever the gear installer put in there

How many miles since your gear change. My installer said I didn’t need to change the oil for 15k-30k depending on how I use It but I changed it at 1 k with Valvolen synthetic.


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silvrzuki77

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Does anyone know if a 2018 requires limited slip additive? I’m getting a chatter during tight turns.

If it’s stock it shouldn’t. I only have 13.5k on my 2018 and it’s super quiet...... I wouldn’t believe it had a limited slip of my build sheet didn’t say so.


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