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Dr.Dakota
Dodge Dakota
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9/04/2002
23:05:38
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 Subject: Does my LSD work?
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I have been in a couple situations that make me think my LSD doesn't function correctly. I thought I would ask you Dakota Off-Roaders before I go to the dealer. I have a '01 4.7L AWD/4WD Auto with HD/Trailer suspension and a 8.25" 10 bolt LSD. Here's the two stories:
1) I was on the shoulder of the road. Both left wheels were on the asphalt, but the two right wheels were in a really slippery pea-gravel about 1" deep. My front right wheel was sligthly pushed into a mild mound, not more than 10" high, nor very steep. When I tried to go up the mound (forward) only my right rear wheel spun, and spun a lot! I put it into 4WD and no change..only one wheel spinning in the gravel. So I sligthly rocked it out in reverse. Why didn't the other wheels grab?
2) My neighbor is having his back yard landscaped so there is a big pile of dirt in the street. Its about 4' high and over two truck lengths long...how could I resist. After a couple passing I went for the big over the top run and high centered. Only my left front was off the ground, and just barely. The other three wheels were on the soft packed dirt. Tried it in AWD and 4WD but only the front left and rear left spun, the right side did nothing. The left rear spun itself a hole and the left front was just hangin there, spinning, off the ground. I finally jacked up the truck and stuck a big rock under the front left and it got enough traction to move out.
What do you guys think? LSD not working after only 10k miles? The truck does that inner wheel hop in tight corners, and the sticker said LSD, so I'm pretty sure I got 'em. Could I just be over powering the clutches..are you supposed to be going really slow for both wheels to get traction?
-Thanks for any help guys.
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Clevite 77
GenI
9/04/2002
23:25:11
|  RE: Does my LSD work?
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on each axle, which ever tire has least traction will spin and the other wil not. but if both tires have equal traction they both spin. If you want both to spin on each axle, you have to get some kind of a locker, (LockRight, detroit locker etc...)
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4wDakota
GenIII
9/05/2002
10:21:01
|  RE: Does my LSD work?
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Since it chirps around corners, chances are you have a LSD. You may want to change the gear oil and give it a quick visual inspection.
Have you changed the gear oil or gone through deep water before?
When you refill it (after verifying the clutches don't look shot) make sure you put in the friction modifier additive. They may have left it out at the factory or maybe your gear oil was changed already. I say that because some guys go through deep water crossings and change the fluid (as recommended) and overlook adding the friction modifier. Since your truck is under warranty I'd take it to the dealer and have them do it. Tell them it isn't working properly and then they can go through the trouble of changing the fluid.
One last point, if you are only giving it light throttle it won't always engage. Next time you test it out and one wheel starts spinning mash the throttle down and see if it engages.
98 CC 4x4, 5.2 Auto 3.55LSD
3" Body Lift, 1" Torsion Bar Lift, 33" BFG A/T KO's
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Dr.Dakota
Dodge Dakota
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9/05/2002
12:35:05
| RE: Does my LSD work?
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Thanks for the input...I will have the dealer give it a full inspection and oil change, including the modifier. I better have LSD, I paid for it! Clevite, your response fits the definition of an Open Differential. By the way, 4wDakota, your truck is beautiful.
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4wDakota
GenIII
9/05/2002
13:44:29
| RE: Does my LSD work?
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Well thank you Sir!
Is it still the original fluid in it?
If you've gone through deep water you may want to pull the fill plug out, dip your finger in and check that it is still oil. Instead of being water with oil, milky white.
If it has water in it, change the fluid yourself so dodge doesn't void your warranty.
98 CC 4x4, 5.2 Auto 3.55LSD
3" Body Lift, 1" Torsion Bar Lift, 33" BFG A/T KO's
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Dr.Dakota
Dodge Dakota
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9/05/2002
15:02:51
| RE: Does my LSD work?
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Haven't gone through deep water...don't have any here in SouCal...no water at all actually. This afternoon after work I'm going to check the level etc., but anymore than that it goes to the dealer, and yes, its the original fliud...I only have about 11K on the truck with only about 1-2K mild off roading. Good tip about the water in the fluid and the warranty.
Thanks again!
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Chaximus
Dodge Dakota
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9/05/2002
15:03:07
| RE: Does my LSD work?
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Just remember, limited slip isn't entirely a locker. It functions similar to a regular open differential. I have a powertrax no-slip locker on my rear and it keeps both spinning at 50% at all times. Limited slip will not do that so don't expect it to spin both tires all the time. I doubt there is any problem with ur LSD, but a checkout wouldn't hurt. Just keep in mind, it's not a locker ;)
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JP
Dodge Dakota
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9/05/2002
20:24:58
| RE: Does my LSD work?
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Chaximus is correct. LSD does not direct all power to the wheel with the least traction, just a percentage. An easy way to tell would be to jack both rear tires off the ground, place the transmission in neutral and the transfer case in AWD or neutral and spin one wheel manually. If both turn the same direct the LSD is working.
JP
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fastbeny
Dodge Dakota
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9/06/2002
06:33:56
|  RE: Does my LSD work?
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Do you see tracers? Try to smoke some weed at the same time....
Oh i think i missunderstood....
wrong site....
oops....
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Dr.Dakota
Dodge Dakota
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9/06/2002
11:13:32
| RE: Does my LSD work?
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Yeah I understand that it isn't a locker, and the wheel with traction isn't going to get all the torque, but I'm not getting any. One wheel will bury itself (like an Open) and the other...nothing. I have jacked up the car and spun the wheels, they both turn. Also I have had one up in the air and it didn't spin (unlike an Open, where the up wheel will spin) like taking off the lugs when changing a tire. So it is an LSD, but still not working right.
Chaximus- tell me about your Powertrax locker...How much, where, does it fit into my existing diff. or do you replace the whole axle. Fits a '01 ? Got a site to check out?
Thanks guys!
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Chaximus
Dodge Dakota
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9/06/2002
16:11:39
| RE: Does my LSD work?
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Hey man, the powertrax locker is just like an open differential on the road. I rarely notice it when driving and turning, except for when im in reverse, then it's obvious. But other than that, it's not there. I got mine for around $400 at a local off road shop in rochester, ny. You don't replace the entire axle, it fits into the diff.
check out www.powertrax.com
P.S. It's a life saver in mud ;)
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4wDakota
GenIII
9/06/2002
16:57:39
| RE: Does my LSD work?
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The powertrax is cool because you don't have to take apart the rearend to install it. There is one catch though, I don't think you can put it on a LSD rearend. The powertrax replaces the guts of the differential (spidergears). With a LSD the clutches and other parts are inside the differential. Contact Randy's R&P and ask them if the guts can be pulled out of an LSD. You may have to buy a new carrier and pull apart the diff. $$$
98 CC 4x4, 5.2 Auto 3.55LSD
3" Body Lift, 1" Torsion Bar Lift, 33" BFG A/T KO's
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mcc
Dodge Dakota
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9/06/2002
17:10:37
| RE: Does my LSD work?
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Try a little left foot braking when you loose traction with one tire. You sometimes can trick the diff. to lock up.
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chaximus
Dodge Dakota
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9/07/2002
09:25:22
| RE: Does my LSD work?
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Yeah, i agree with mcc..i've seen my wheelin buddies with open diffs put their foot on the brake and lock up the diffs. Pretty neat trick.
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