Track Lock. Grumbling noise in slow turn?

[Jeep-I-Joe]

The grumbling noise is coming from the rear end. It only happens in a slow sharp (greater that 60 degrees turn). It happens either way I turn. There are no other suspicious sounds on the drive train. It is not a squeaking noise. Its like a low grumbling power steering pump sound, only it's coming from the trunk area. I was reading an incomplete thread from 9-2007. A similar noise was recognized as being a common noise for a Track Lock. Is this noise something I should be concerned about? Or, is it normal and par for the course?

 

[tjkj2002]

When was the last time the gear oil was changed? Time to change it regardless and add 4oz of friction modifier,your lacking(or it has degraded) the friction modifier and your trash loc does not like it.Need to get it fixed ASAP(really like now or don't drive it till you can afford it) since it will destroy the LSD and can take the whole rear end out if left this way for sometime.

 

[J-Thompson]

Agreed
how ever not knowing the milage on your Jeep only knowing it is an '02
I would bet money that the LSD is shot
mine was at 30K ,never even came due for the "regular mait."

 

[Jeep-I-Joe]

Wow! what's a replacement LSD run in USD?

To answer my own question... I checked it out and these Detroit Truetrac Differentials run between $375 USD and $512 USD. I found the least expensive at Summit Racing. Surprise! The link is below.

http://www.summitracing.com/parts/DTL-912A585/

 

[J-Thompson]

I would bet money that the LSD is shotQUOTE]

Wow! what's a replacement LSD run in USD? This may be jumping the gun, but, is there and upgrade mod that I should consider? My Jeep has 75k miles on it. I had her checked out today at the dealership. They said she was due for maintenance on the differentials and trany. Would they not have picked up on an LSD that was flat "out"?

let me put it like this
does a clutch last for ever if it slips all the time?
that is what the trac loc does
would the dealer pick up on it probably not
it there some thing better sure
what do you want bullet proof off road monster
or a more road friendly diff that will work ok off road

monster = Detroit locker
road friendly = Detroit True Track

 

[Jeep-I-Joe]

When was the last time the gear oil was changed? Time to change it regardless and add 4oz of friction modifier,your lacking(or it has degraded) the friction modifier and your trash loc does not like it.Need to get it fixed ASAP(really like now or don't drive it till you can afford it) since it will destroy the LSD and can take the whole rear end out if left this way for sometime.

I just bought her this week. No maintenance records. I don't know when her last gear oil change was. I'll take care of it this weekend though. I'll use the ATF+4 and add the 4oz of friction modifier. With the front differential, is friction modifier necessary? Can I get away with red RTV and skip the gasket?

 

[Jeep-I-Joe]

what do you want bullet proof off road monster
or a more road friendly diff that will work ok off road

monster = Detroit locker
road friendly = Detroit True Track

Would the Detroit True Track do away with the Track Lock technology? If so, would most consider that a good thing? Does anyone love Track Lock and Why?

 

[ridenby]

I just bought her this week. No maintenance records. I don't know when her last gear oil change was. I'll take care of it this weekend though. I'll use the ATF+4 and add the 4oz of friction modifier. With the front differential, is friction modifier necessary? Can I get away with red RTV and skip the gasket?

You might want to rethink your choice of fluid to put in diff.

 

[Andynator]

I had that with my '02, but very infrequently. Seemed like it only occurred sometimes when turning left, not right; and was somewhat dependant on the load placed on the right rear tire. To clarify, it would only (sometimes) occur when turning left, UPHILL, and pulling away from a dead stop, never during a "rolling" stop. I assumed it was related to the LSD. Anyway, no problems and no noise after I had the pumpkin flushed while still under warranty. Didn't find any chunks.

 

[Jeep-I-Joe]

no problems and no noise after I had the pumpkin flushed while still under warranty. Didn't find any chunks.

Very comforting It gives me hope anyway.

 

[Jeep-I-Joe]

You might want to rethink your choice of fluid to put in diff.

Oh, yeah. I looked back at my list. It's Mobil 1 75w-140. Right?

 

[ridenby]

Oh, yeah. I looked back at my list. It's Mobil 1 75w-140. Right?

Yes,Sir

 

[J-Thompson]

Would the Detroit True Track do away with the Track Lock technology? If so, would most consider that a good thing? Does anyone love Track Lock and Why?

it does the same thing only 10X better at it and no clutch packs
I liked the idea of track lock when I bought my TJ
now ,knowing what I know, I would not even bother
I would and did replace it with something that works like it should

 

[Jeep-I-Joe]

I would and did replace it with something that works like it should

Are there any drawbacks to making this switch?

 

[tjkj2002]

Are there any drawbacks to making this switch?

No,juts don't do a lunch box style.The Detroit True Trac,Detroit Locker,or ARB are the best.

 

[Jeep-I-Joe]

tjkj2002,
I like your rule "When it breaks, upgrade!" My wife told me to wait until things break to do any mods. I'll have to tell her, "Oops, I broke the LSD"

 

[tjkj2002]

tjkj2002,
I like your rule "When it breaks, upgrade!" My wife told me to wait until things break to do any mods. I'll have to tell her, "Oops, I broke the LSD"

I like the one below that one

 

[Jeep-I-Joe]

I like the one below that one

I'm the expert at that one!(biggthumpup)

 

[KYLiberty]

My factory LSD did break. It damaged the pinion bearing when it went also. I had it replaced with the DTT. I would have switched to it long before the factory trash-lock broke if I had known how much better it was.

 

[Jeep-I-Joe]

My factory LSD did break. It damaged the pinion bearing when it went also. I had it replaced with the DTT. I would have switched to it long before the factory trash-lock broke if I had known how much better it was.

The more I check into it the more confident I become. It seems like a strong piece of engineering. I'll be sure to protect it with a Riddler cover.