I have a Power lock in my front dana 30 axle. Since I lifted my jeep it does not seem to work no more. I am running 33" mud tires. When I was running 31's both front wheels would spin now I am only getting 1 to spin in the mud. Does any one know how to tune these limited slip units. Thank you atswilson.
Mine is not a locker. It is clutch driven posi unit or limited slip unit. I have emailed around asking about heavier clutches. So far no response. The Power lock came factory in the 1970's and 80' jeeps, scouts and some bronco's.
It is always the lightest wheel that spins. Does not matter which side.
No vac. shift system on this one. My 4wd is working great. The posi unit just is not strong enough to make both front tires spin since I went with 33" tires. I have a locker in the rear and both rear tires spin and only 1 front tire spins. Prior to putting the 33" both front tires would spin. You can jack it up and by hand you cannot force the tires to spin in opposite directions. They always spin together when jacked up. The Posi is still working it just is not strong enough.
Ahh...well that make sense too, if def. sounds like your clutches are worn, 33's will have more leverage to overcome the locking power of your clutches than the 31's did.
My first course of action would be a fluid change, and add the posi additive to the diff. to see if you can give the clutches a little more help biting the steel plates. This is prob. only a short term fix, eventually you are going to need new springs, or a complete rebuild.