Limited Slip Differential - In My Dreams!!

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I had the same trouble with my "limited" slip. With one tire in wet grass and one on gravel and I couldn't move. I jacked one wheel up as outlined in the service manual and checked the torque on the LSD. It checked out. Dealer looked at it the same way I did and said it was ok. I asked him to explain why I couldn't move on a level surface. They jacked one wheel up and tried to move the truck on the concrete garage floor (one wheel in the air on the jack). No dice. Sat there spinning like an open differential. They replaced the clutch pack under warranty (30k) but the new pack isn't much better. Worked good initially but I think the modifier has worked into the pack now. I think a change of oil and less friction modifier is my next step. Maybe Amsoil.

Applying the brake when one wheel is spinning will help, even with an open differential. It causes more torque to go to both wheels, effectively increasing the torque available to the wheel with traction. It has nothing to do with the LSD.

My '95 gasser LS worked great. I think the weight of the Cummins might be part of the issue.

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2000 2500 QC SB 6sp. etc...

 

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Try the amsoil, The modifier is not needed with it.

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95,2500,auto,410;2-WD
Gear Vender Overdrive
tst #5

 

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Check this one out... .
I was having a little problem of my rear limited slip grabbing as I turned corners... not enough additive from the factory. I figured I'd let the dealer add some since I was going in for some warranty work anyway. From across the lot,I watched the tech as he rolled under the truck and simply dumped in additive. Not only that,but the moron went and dumped a bottle full in the front differential as well!! Where did they find this guy??!! Now there's too much in the rear,but think I'm going to leave it until winter is over.

-Mike

 

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Ski Bum, Pete Peterson is correct. #ad


Thunderball, you are also correct. #ad


JohnE, the Gleason/Torsen worked pretty well with stock HP levels being applied to them. This used to be a great addition to the front differential due to its differentiation abilities while producing absolutely NO ill side effects. #ad


fmj, the Auburn posi, requires the friction modifier ratio to be pretty close as it utilizes a tapered cone clutching system. This type of system works real well. #ad


Vaughn (MacKenzie), also check out the Amsoil gear oil thread in the products forum.

 

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I have the exact same problem with my LSD... It has forgotten all about the limited part!!

I have the original fluid and plan on changing to fluid without the modifier then adding small amounts if needed. . If this doesn't work. . I will have it changed out under warranty...

Knuckledragger is right about using your emerg brake to split torque to your wheels. . It helps on open axles with DRUM brakes in foward motion because of the way drum shoes use the motion of the drum to help apply themselves--- Thereby slowing down the spinning tire sending some more torque back thru the differential to the other axle...

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"Have you driven OVER a phord lately"
2001 2500 BRT WHT SPORT QUADCAB 4X4 ETH 3. 54LSD TRLR CMPR PKG ALL OPT XCPT LTHR

 

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Well I tried the emergency brake thing the other night on that same patch of ice. No real help. I think KWIKKURT has a good point, that trick is most effective with rear drum brakes, while I have the new rear disk brakes. Anyway, no help. Spin-spin-spin.

By the way, last night was driving back from the ski mountain. Had about 12" of snow on top of an icy base on the side roads. Got stuck for a moment on the road up to my house, and I WAS IN 4X4. Not bad, I got started again under my own power, but not real great traction. With all the weight on the front end of these trucks perhaps an air-locker on the front axle is the ticket? Could switch it on when you are loosing front-end traction, then switch off for a open front differential otherwise. Anyone done this?

 

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Well my LSD is toast as well. After reading this thread and getting some snow and ice I thought I'd check it out. In my paved driveway (Not all of them are paved in AR) with one wheel on ice and the other on dry pavement the truck moved about 4 inches and stopped, modulating the brake pedal (AKA Hummer lockers) did little to help- still stuck. Pulled the truck into the garage, Jacked one tire, in neutral, brake off, could not rotate the tire in the air with hand pressure. Started the truck, put it in reverse, wouldn't even make my floor jack roll and the casters on the floor jack were even pointed the right way. I've owned 100k and 200k mile LSD's that would drive the vehicle off a jackstand. Looks like the Dodge boys will be doing a rebuild- not looking forward to the downtime or arguing when the next clutchpack is fried after 36K miles. My buddy detroited his when he went 4. 10's- I'm jealous (Of the detroit, not the 4. 10's which would be hell at 80 without the gearvendors OD). I'm really kind of surprised with Dana- I've always liked there products- putting a 60 in the front of the Jeep now.

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01 2500 4x4,SB, QC, black sport, 5 speed, BFG All Terrains, leather, 3. 54, anti-spin, camper package,241HD,RBW 15k 5er hitch, tow package, tonneau, Xenon flares, Westin nerf bars, custom rubber flaps. Ordered 1/14/00, delivered 2/20/00- one day before 2000 mile 19k gross trip to Las Cruces- breakin it in right. 14000 miles. Amsoil synthetics and their oil bypass system, Greddy turbo timer. PS boost module on the way.

Bombed- gages and DD1's, former PMAX2

Toys- 84 coilsprung CJ-7 with 5. 2 magnum auto transmission, Go2Guy Engineering transfer case clocking adapter (Dana 300) and all the big dog jeep goodies.

Tige 2100i inboard ski boat w/ tower

30'Tahoe 5er with slide, soon to be modded with a rear deck and extra axle to haul the jeep!

 

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With all the weight on the front end of these trucks perhaps an air-locker on the front axle is the ticket? Could switch it on when you are loosing front-end traction, then switch off for a open front differential otherwise. Anyone done this?

I haven't, yet. But I've been experimenting with my rear locker now that we have had some snow and ice here. My preliminary conclusion is that for those "one wheel on good stuff, one on ice or in the ditch" situations, the locker is a dream come true. Once you engage, you drive forward as if you were on solid ground all around. (that noise you just heard in the background was all the more experienced hard-core off roaders going "well DUH!) #ad
However, with both wheels on the super slippery stuff, you can't hardly tell the difference. On ice, you need chains, studs, or something that gives traction. Front and rear lockers would just give 4 wheels spinning instead of 3. That said, I'm sure a locker on the front would help in certain specific situations - heck, sooner or later someone is going to have one front wheel on a dry patch and the other three on ice...
I love the locker, but I feel about traction like some on this board feel about power - you can never get too much!


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2001 ETH, QC, LWB, 4WD, 3. 54, SPA Pyro & Boost, K&N RE-880 w/foam pre-cleaner, ARE Z-series Cab-high shell, Rear ARB locker, and all kinds of synthetic fluids...

 

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The only time my LSD seemed to work on my 99 was on icy roads causeing me to default into curbs. I was disapointed when my new truck did't have LSD, but after driving in snow and ice I feel it is much safer. When I recover from my new truck purchase I will install ARB system. That is what all the trucks use for offroad operations and competition. I have also found that the OE diff fluid looks ugly right off the bat. I just 75/90 redlined both pumpkins. In my 99 the redline never got ugly.



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2001 2500 tow, camper, SWB, ETH, Bright white.

 

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I spoke with Chris @ Randy's Ring & Pinion yesterday. These guys are real big into gears, lockers etc for both the 4x4 and fast car crowds. According to Chris both Ford and Dodge got a bad batch of Dana 80's (Did not ask about 70's). It seems the LSD carriers were mismachined leading to premature clutch wear. It gets worse, the 3. 54 LSD is being discontinued and is becoming scarce- not sure if Dodge has any supply or not. The only options for the 3. 54 in the 80 which he can get his hands on (And he is a huge DANA dealer)are an open carrier, a Loc-rite for the open carrier, or the ever popular, always pricey, works great when it gets air, ARB. Guess I better get on the phone with my dealer and see what he can do for me- wish me luck!

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01 2500 4x4,SB, QC, black sport, 5 speed, BFG All Terrains, leather, 3. 54, anti-spin, camper package,241HD,RBW 15k 5er hitch, tow package, tonneau, Xenon flares, Westin nerf bars, custom rubber flaps. Ordered 1/14/00, delivered 2/20/00- one day before 2000 mile 19k gross trip to Las Cruces- breakin it in right. 14000 miles. Amsoil synthetics and their oil bypass system, Greddy turbo timer. PS boost module on the way.

Bombed- gages and DD1's, former PMAX2

Toys- 84 coilsprung CJ-7 with 5. 2 magnum auto transmission, Go2Guy Engineering transfer case clocking adapter (Dana 300) and all the big dog jeep goodies.

Tige 2100i inboard ski boat w/ tower

30'Tahoe 5er with slide, soon to be modded with a rear deck and extra axle to haul the jeep!

 

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SkiBum... . you might want to check into having your current tires "Siped". Go to any larger tire shop. Cost about $8 - 10 per tire.

I have less then 6/32 left on mine and had them siped this fall. I have no problems staying in 2wd even starting on hills from a dead stop and driving uphill.

Siped tires really shine in snow and ice covered roads. How sound like you get to drive on them allot.

BTW, I have the factory Dana 80 3. 54 LSD with 185K miles. Truck has been pulled very hard with lots of heavy loads. Everything still stock and never been adjust or touched. I have NEVER been able to get only one tire to spin on mine even on drive pavement. It has always worked great. It is the most "locked" LSD I have driven as compared to factory (Chevy, Ford, Dodge). Change fluid every 40K... . Amsoil S2K 75W30 + Mopar additive.

jjw
ND

 

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My LSD test - Mash down hard on the right pedal and check the rear view for 2 lovely rooster tails of sloppy stuff or 2 black lines on dry pavement. Yup, it's working... #ad
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Y2K Red Stealth Sport 2500 4X4 QC SLT+, 5-spd, 3. 54 anti-spin, 265-75-16 LTX’s (There ain’t no such thing as options, cause ya gotta have it all, including: DC’s dead cow/vinyl interior and don’t stop anti-lock brakes. ) Stock, but not for long. Oops, too late. What silencer ring? (More fun than my 98 SST)

 

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I know it sounds crazy but I jacked up the right rear so as it would not touch the ground. I got in and put it in gear and it pulled itself off the jack with just one tire on the ground. I think mine is working also. I plan on getting some mud tires as money allows to help when I am off road and in the pasture.

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2001 quadcab slt 2500 HO 6spd. LWB,2wd,dk garnett red, trailer tow package,camper special, anti spin 3. 54 axle, speed liner,oversized stainless steel chicken slide,66 gallon in bed aux. tank,K&N air filter,Reese 20k hitch, Terry 2000 EX 30ft. double slide 5er, 2000 20ft gooseneck for haulin jeep, firewood and huntin stuff. 5X12 tagalong for haulin the 4 wheeler. Okie Newton

 

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<font color=blue>I "tested" mine in CO and sure enough two big ol black beautiful strips of rubber. **** shame the street sweeper tried cleaning it the next day..... still need to develop my pictures #ad


So as far as I know my Limited slip is working.

 

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Hey folks - you may want to check this site:
http://www.powertrax.com/home_frame.html

This is a new powertrax - and I mean new system that the 4x4 mags love. This spring -
April they'll have a Dana 70 ready. If you want some great data - download the Adobe
(ouch 6+MB File) and it is simply fantastic stuff. I talked to a guy who has one in his CJ - and he loves it. They have apparently married the best of both worlds - the locking
capability without the clunks and bangs and the driveability of the limited slip. This may be what the Dr. Ordered.

 

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From what I have read about these you have to have an open diff for them to be put into. They won't work with our factor LSD.

 

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From what I have read about these you have to have an open diff for them to be put into. They won't work with our factor LSD.

Their web page says the opposite. Did I miss some fine print that applies only to our Dana's?

 

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These units all go inside the carrier replacing the side and spider gears. Our LSD don't have anyway for these unit to go in.

 

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I downloaded the Adobe file(the big 6mb one) and on page 15, under the Easy to Install para -top left of page) on the 2nd para it mentions the following:

"Limited-slip/posi (LS/Posi) and centrifugally activated differentials can be easily upgraded with a Powertrax as can open differentials. " They claim the installation is nearly identical. They state ... "When upgrading an LS/Posi, it is only necessary to remove preloaded springs before removing the spider gears, and to remove the friction plates after removing the side gears. Once these parts are removed the installation continues.

 

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Ok OK OK - hey I don't work for these Powertrax guys or anything - or own stock, nor know anybody there - just thought the stuff looks great. I just called them and they will have a unit this April for the Open Differential Dana 70's and a short time later - month or so for the factory LS. By the way, they told me that they work great on the front end as well. No problems as a daily driver. What do you folks think about having this on all both front and rear?