Broken Part in Rear Diff

[c20elephant]

LBZ, couple questions for you about the truck, how many miles, are you inclined to do "burnouts", did you buy the truck new or used, do you race or pull.

Found this for a detailed operation of the G-80

https://www.youtube.com/watch?feature=player_detailpage&v=tTGZOJQQBeE

Did you see this company...

http://www.drivetrainamerica.com/p-...gm-chevy-dodge-115-aam-rear-differential.aspx

 

[56taskforce]

That's funny Mike I was going to ask if you could find that G-80 demo when I saw your first post on this thread.

Nothing wrong with the True Trac but it isn't a locker it is a limited slip.

 

[c20elephant]

G80 is starting on its way out. Id imagine quite a few of us have that same issue but havent checked yet.

Or are to scared to look, so we choose not to.

Should I even consider removing the cover.?

Early morning reading below..

G-80 Conumdrum

 

[56taskforce]

I am thinking about pulling mine now. I has not been locking ever time lately and I don't want to have to replace a ring and pinon as well as the diff. Last year the G-80 in our Tahoe came apart got real lucky the chunks didn't do any other damage. I have had 4 of them come apart on me in different vehicles.

 

[Dallas S]

I've found the AAM helical diffs for $575. That's the factory dodge unit, and same design as the Trutrac. For half the price, I'd buy the AAM unit.

The gear that's broke in your pic, IIRC, is the drive gear for the fly weight that engages the diff locking. If that gear breaks or has a piece missing, it won't spin the actuator so no engagement.

The true trac is a tighter LSD then the dodge unit.

None the less both are better in "abusive" situations then the gov-bomb IMO

 

[LBZ]

LBZ, couple questions for you about the truck, how many miles, are you inclined to do "burnouts", did you buy the truck new or used, do you race or pull.

Found this for a detailed operation of the G-80

https://www.youtube.com/watch?feature=player_detailpage&v=tTGZOJQQBeE

Did you see this company...

http://www.drivetrainamerica.com/p-...gm-chevy-dodge-115-aam-rear-differential.aspx

210 000km, done maybe two rolling burnouts since I bought the truck brand new, pulled with it once and maybe a dozen passes at the track. Runs around in mud, snow, gravel for over half its total mileage and always rolling around at or around 8000lbs with lots of towing a 10 000lb trailer.

 

[LBZ]

The true trac is a tighter LSD then the dodge unit.

None the less both are better in "abusive" situations then the gov-bomb IMO

From what I have read the tru trac is stronger than the Dodge design.

 

[c20elephant]

I was perusing through a few sites and this thread jogged my memory in respect to what I have read about the Trutrac and keeps my mind off of other issues, this one raised my eyebrow a bit...

http://www.differentials.com/eaton-detroit-truetrac-faqs

What kind of oil should I use? Can I use synthetic? Do I need friction additive/modifier? A quality petroleum/mineral based oil works best in the Truetrac units. We do not recommend synthetic oil. Friction additive/modifier is not required.

 

[LBZ]

I was perusing through a few sites and this thread jogged my memory in respect to what I have read about the Trutrac and keeps my mind off of other issues, this one raised my eyebrow a bit...

http://www.differentials.com/eaton-detroit-truetrac-faqs

Not sure where that came from but this is straight from Eaton off their website-first sentence:

Detroit Truetrac

High quality mineral or synthetic gear lubes are required for use in Detroit Truetrac differentials. Regardless of the lube type, always use a GL5 rated lube with the least amount of friction modifier. Mineral lubes lacking friction modifiers (limited-slip additives) were historically recommended for all Truetrac applications because friction modifiers can slightly reduce the bias ratio (limited-slip aggressiveness) of Truetrac differentials. However, to address the continually increasing power outputs of modern powertrains, many vehicle manufacturers have switched to synthetic lubricants as a counter measure for increased axle temperatures and prolonged service intervals. In general, consult the vehicle owner's manual for the manufacturer's recommendations for lubrication type, weight and fill volume. This will ensure lube compatibility with the seal materials and bearings used in the axle. Eaton Performance technical support is available for any concerns in lube selection.

 

[c20elephant]

Not sure where that came from but this is straight from Eaton off their website-first sentence:

Detroit Truetrac

High quality mineral or synthetic gear lubes are required for use in Detroit Truetrac differentials. Regardless of the lube type, always use a GL5 rated lube with the least amount of friction modifier. Mineral lubes lacking friction modifiers (limited-slip additives) were historically recommended for all Truetrac applications because friction modifiers can slightly reduce the bias ratio (limited-slip aggressiveness) of Truetrac differentials. However, to address the continually increasing power outputs of modern powertrains, many vehicle manufacturers have switched to synthetic lubricants as a counter measure for increased axle temperatures and prolonged service intervals. In general, consult the vehicle owner's manual for the manufacturer's recommendations for lubrication type, weight and fill volume. This will ensure lube compatibility with the seal materials and bearings used in the axle. Eaton Performance technical support is available for any concerns in lube selection.

Eaton is suggesting NO to friction modifiers not synthetics is the way I interpret the paragraph.?

 

[DPC]

http://www.ringpinion.com/b2c/Produ...=Rear Diff - 4WD&DiffId=190&Source=DiffWizard

I have this one in my 06 Dodge (same one for your truck) and love it, no noise, jerking, or binding. Daily driver.

I also have a grizzly locker in my 03 duramax which has plenty of jerking, binding and noise but when it is locked its locked period. Race only truck.

 

[PureHybrid]

The true trac is a tighter LSD then the dodge unit.

None the less both are better in "abusive" situations then the gov-bomb IMO

That's what everyone says, but I don't hear dodge guys complaining.

 

[LBZ]

Correct I would say.
Synthetic is fine.

 

[LBZ]

That's what everyone says, but I don't hear dodge guys complaining.

I've heard they are better but not as good as the tru trac. Guys are still piling them up more often than they should.

 

[Chevy1925]

Dodge unit is a 2:1 ratio, true track is a 3:1 ratio. The true track will keep the two tires spinning under conditions where a single tire has more traction than the stock dodge unit.

If it weren't for the fact the g80 likes to die, you wouldn't hear us complaining either. They don't hardly have issues so there isn't much to bitch about unless you use it off road a lot where you need a locker

 

[56taskforce]

The G-80 or Gov locks work great they are just prone to breakage and commonly grenade themselves.

 

[c20elephant]

Dodge unit is a 2:1 ratio, true track is a 3:1 ratio. The true track will keep the two tires spinning under conditions where a single tire has more traction than the stock dodge unit.

If it weren't for the fact the g80 likes to die, you wouldn't hear us complaining either. They don't hardly have issues so there isn't much to bitch about unless you use it off road a lot where you need a locker

James, would the TrueTrak be best suited for a heavy footed 52 y/o guy in a 2x4 daily driver.? The more this thread pops up the more I'm inclined to remove the cover, inspect the carrier and change the 3 y/o gear lube...