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Custom Dodge Ram Performance Mods - Engine - 5.7 HEMI V8 Discuss modifying your Dodge Ram with Performance Parts and Accessories!
Factory Spec: 5.7-liter HEMI® V8 engine - 390 horsepower, 407 lb-ft of torque.


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  #1  
Old 06-03-2014, 08:06 AM
VeghTheHun VeghTheHun is offline
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Red face Help Needed with Rear End. (swap)

Hey guys, just need a little advice here. Bought my truck used, realized now it has the open diff 3.55 in the rear. Needless to say I am looking to change that out. My question is that is a 4.10 Limited Slip available? Also, if I do change the gears in the rear end, is there anything I would need to do to the front end? (its a 4X4). thanks
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Old 06-03-2014, 09:49 PM
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If you swap the rear end out you will have to stay with the same ratio that is in the front unless you change it too. As far as going from an open diff to an LSD it would be cheaper to find one out of a wreck and do the swap, but you wouldn't be able to change ratio without doing a gear swap up front as well.
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Old 06-04-2014, 08:25 AM
VeghTheHun VeghTheHun is offline
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Crap, I was hoping the transfer case would take care of all that.
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Old 06-04-2014, 12:56 PM
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matt085 matt085 is offline
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I had my open diff swapped to an Eaton detroit tru trac locker recently. i can assure you that it is a huge difference! I planned to changed gears too, just like you, but they stayed the same because i was not planning to do the front too

open


detroit true trac
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Old 06-04-2014, 04:39 PM
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I've got to ask, is the eaton detroit true trac rear end better then the lsd rear end? I've got a 3.92 lsd just wondering.
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Old 06-05-2014, 08:02 AM
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hey matt, I think I am in the same boat as you. Switching all the gears out seems a little impractical, however like you I can not stand an open diff. Can you guide me to where you got that and how much it was? Is your a 3.55 rear end as well? thanks!
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Old 06-05-2014, 12:42 PM
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indeed mine is a 3.55 as well. got it open in the first place to inspect everything and deal with the whole pinion nut rear diff problem discussed on the forum. there was no damage to ring and pinion gear so those were reused.

as for the difference between a standard LSD and this one (correct me if I am wrong). both the standard LSD and this one are limited slip. they are just differently constructed with one beeing a clutch LSD and the torsen style works with gears. this means far less moving parts, so no clutch plates and springs so less to break and go wrong, meaning less maintenance. i supposively only have to change oil every 100000km, thats it. this without LSD additive.

I can't compare the two, I never tried a standard lsd since i went from open to the truetrac. I did notice it locks really fast and stays locked as long as needed. I noticed when the diff should react it does it almost instantly. it doesnt take a half turn of the other wheel till it reacts. in case one wheel is completely of the ground it could be nessecary to apply the e-brake a bit to bite. again I have nothing to compare too other then an open diff.

VeghTheHun, I think they cost about $600 without installation. i cannot recommend a shop because i had them installed in Europe. If you go with this one you won't regret it. they cost a bit more but are bulletproof and it repays itself by beeing maintenance free.

heres a video, its not the best one but a ram: the black ram has detroit lockers and the red i think other lsd. is it a honest comparisation? don't know, can't see the tires on my small cellphone screen. but you can see the locker work.
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Old 06-05-2014, 03:03 PM
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If you want to go to a limited slip go with an Auburn or a truetrac. The stock LSD is nowhere near as durable as the aftermarket would be. The stock unit is problematic and high maintenance compared to one of the aftermarkets.
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Old 06-05-2014, 03:51 PM
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Awesome guys, Ill look into finding a TrueTrac locally first. then if I have to find an online source. thanks!
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