Rear locker for 3rd gens?

[JHardwick]

It will unlock with no input torque on the pinion and lock when input torque is applied.

So which side unlocks in a straight line coast? You make it sound like both sides unlock which would make engine braking impossible



I'm done on this thread, I don't believe you fully understand how this locker works. The coast to power sound is the backlash, not necessarily unlocking/locking.



If you want my honest opinion, you just jumped in here to start a debate so you could show your "ultimate knowledge".



The thread starter asked if a locker was available for his rearend ... ... ... ... a few posts went back and forth over LSD/POSI/LOCKERS etc ... ... ... . and then you step in with your "ulimate knowledge". Not long after, you identify yourself as a supposed "TracTech Dealer", but never once answered the original question. Some dealer

 

[Tim]

So which side unlocks in a straight line coast? You make it sound like both sides unlock which would make engine braking impossible

Not true. At least one axleshaft always has to turn ring gear speed. If there is any input torque, both must.

I'm done on this thread, I don't believe you fully understand how this locker works. The coast to power sound is the backlash, not necessarily unlocking/locking.

The backlash is what allows it to lock and unlock.



If you want to see the simplist of designs, go to www.richmondgear.com, click on powertrax and look at the the design of the Lock-Right automatic locking differential. In that design, the cross pin is what pushes the center outward, locking both of the axles to the carrier (it uses the stock carrier). There isn't enough space in there for BOTH sides to unlock and turn faster than the ring gear, so only one side can truely unlock at a time.



That said, it is not ever the turning of the axles that locks and unlocks the unit. Some movement of them sometimes has to occur for the locking and unlocking motion to happen (ARB included, sometimes you have to roll to get it to lock or come unlocked) but that said, the mechanical force the locks the axleshafts together comes from one place--the pinion, not the axlehshafts.



"Unlocked" doesn't mean that both axles are allowed to coast. It means that the differential will allow one axleshaft to overspeed the ring gear. If you're off the gas, it is unlocked. You have compression braking because at least one axleshaft is still locked to the carrier..... but should you turn while coasting, one axleshaft can overspeed the carrier because the assembly is unlocked.



The Detroit locker brochure doesn't say much, but this differential is similar (used for heavier duty applications) and you can see the parts and understand the operation better:

http://www.tractech.com/docs/OEMNoSpin.pdf

 

[fyrescott]

A Detroit is not a full time locker. Not only do I have a Detroit in my trail rig, I am a dealer for the product.



A Detroit Locker is an automatic locking differential. It is only locked when input torque is supplied. It is not "constant"ly locked. Yes, automatic lockers do make some noise occassionally when they lock. Over the Diesel engine I doubt you'd even be able to hear it.



Like I said I don't know where you guys got the term, "full time" locker. There is no such thing, unless you're referring to a spool.

Fulltime/Automatic, don't get hung up on terminology. I have had Detroit and ARB lockers in my rockcrawlers for years. If you are telling your customers that these things only lock up with torque applied and are otherwise open, then you are misrepresenting the product big time! I have two sets of boggers that are chewed up to prove it plus that barking of the tires that you here in the parking lot with a Detroit in the rear?? Thats the sound of a locked up locker. Have you ever heard what happens when a Detroit unlocks and hangs up's? Big bang! And when I say fulltime I mean a non selectable (ARB, electric, ect... ) and not a posi either.

 

[Tim]

I drive a vehicle every day with an automatic locker. I'm very familiar with it's operation. If it's locking up and scrubbing tires either it's not operating correctly or its your driving habits, not the operation.



It is not, "open" with zero input torque, but it will allow an axleshaft to unlock if you're coasting, that is what it's designed to do.



My personal rock crawler has automatic lockers in both ends. For that application I see no advantage to selectable and have always run the automatics. That's a matter of personal preference though.

 

[fyrescott]

I chose an ARB up front on both my rigs because I rarely had to use a front locker even on the most extreme trails. 220:1 final drive with dual t-cases made things alot easier!

 

[KBennett]

No civilian pickup truck has been offered with a factory locker in about 30 years.

My 2002 Toyota TRD had a button on the dash to lock the rear diff. I never used it because it did so good in 4WD but I guess it could be a neat option in the right circumstance.

 

[JHardwick]

I chose an ARB up front on both my rigs because I rarely had to use a front locker even on the most extreme trails. 220:1 final drive with dual t-cases made things alot easier!

Just do a planetary Oo.

 

[Tim]

My 2002 Toyota TRD had a button on the dash to lock the rear diff. I never used it because it did so good in 4WD but I guess it could be a neat option in the right circumstance.

I meant automatic lockers, that's the subject here. Toyota has a selectable locker.

 

[Tomeygun]

American Axle & Manufacturing Inc.

Hamtramck, MI 48212

(313) 974-2000





I have been calling like once a week now... I hope they get the message. WE WANT A LOCKER!!!!!!!!!!!!!!

 

[2broke2smoke]

have a spool machined up, she'll be locked for life, LOL

sounds good to me ...



make one for my dana 80 ...



the aam limited slip works perfectly with 35" bfg's

 

[Diesel Dually]

Doesn't GM use the same axle's? I think they offer a "locking" rear axle in all their trucks. I looked under a friends Chevy 3500 and his axle looks exactly like ours. If the internals are the same you may be able to get the parts through GM.



I know, I know, GM parts on my Dodge!!!

 

[Burner]

Two different rears, axles and tubes... very similar houseing.



G80 for GM and Torsen for Dodge.....

 

[Chris N5CWM]

AAM makes the 1150 axles under the 3rd Gen Dodge Ram 2500 and 3500 trucks, and the same basic axle assembly is under the GM 2500HD and 3500 trucks. The GM trucks, if so equipped, have the G80 locking differential, which is described in the next link below.

A separate subsidiary, Eaton, makes the differentials. The locking differential offered in the GM trucks is known as RPO (option code) G80 and has been around for many years. I've owned three GM trucks with the 10. 5 rear axle and this locking diff. As advertised, it works as a limited slip diff until the parameters are met (ie, 100 +/- RPM axle speed differential) and mechanically LOCKS the axles together until another parameter is met (increase in speed to about 20 or so MPH), when a flyweight unlocks the diff, yet it still operates as a limited slip.

From what I can tell, this locking diff should fit as a direct replacement in the rear axle (AAM1150s) in the Dodge Rams. Granted I have not actually had my hands on both axles, nor have I tried the swap myself, I'll bet the swap will work.

It is probable that the axles are tailored externally (spring pads, shock mounts, etc) to fit the Dodge and GM platforms, but I don't see why AAM would change the internal workings of the 1150 dimensionally just to tailor it for a specific manufacturer. Therefore I feel confident that a locking rear differential out of a GM 2500HD/3500 truck with the AAM1150 would fit in a Dodge AAM1150 housing. The only snag to such a swap might be a different axle spline count, which I doubt.



If I had a 3rd Gen Dodge Ram, this is one mod that I would be doing. There should be a few 'donor' GM trucks in local wrecking yards in most big cities.

 

[steved]

The G80, or gov-loc (or even more appropriately, gov-bomb) works... that's about it... they tend to grenade their internals when you are spinning the wheels (the 100RPM difference) and the flyweights cause the differential to "lock"...



Even though I'm not found of the Torsen LSD in the rams, it is far superior to the G80.



Anyone heard any update about lockers for the 11. 50??



steved

 

[Burner]

... ... I wish I didn't but I agree with Steve.

 

[Diesel Nut]

Rumor has it Trutrac is working on a Detroit Locker for us!!! Oo.



I asked the diesel tech here at the dealer ( we are gpood friends) and he said the LSD in our trucks is of a different sort. It is a LSD, as long as both tires have traction! WTF? was my response. Kinda counter productive there, huh? Elxplains why when I want to slide around a corner I am just doing a one legger sometimes.

 

[steved]

I have heard of both ARB and Detroits for the AAMs in the next year or so... was told both were scheduled to have them ready this past spring and both had set backs for some reason or another...



As a side note, my AAM LSD is working properly now... I changed from Mobile 1 75w90 to Royal Purple 85w140 (I still think their Synchromax SUCKS!!)... I can pull posi anytime I dip into the throttle now...





steved

 

[Diesel Nut]

Yeah, in a straight line I can get 2 legs all day long, but get one tire in the dirt and one on the street and its like on LSD at all.

 

[Burner]

They only work loaded... . :{



I just want an electric switch for "full possie" every now and then, that's all.

 

[TheBigSgt]

I believe that the EATON E-Locker is a limited slip with a selectible locker.