"Squeal" from LSD rear? '02 Tundra

[senor_blueduck]

Hi, brand new to the forums and I love it so far. I changed the fluid in my Tundra's LSD this weekend. It has 20k miles and I changed from the OEM fluid to Mobil 1 synthetic 75W-90. I used a pump to drain all the fluid and then filled with 3.5qts of Mobil 1. Now the LSD makes a medium-pitch squeal in sharp turns. Kinda sounds like a bad power steering pump or slipping belt, except it definitely comes from the rear. Did I put too much or too little? Do I need a friction modifier? Never heard it before and just wondering if anyone has experienced this before. Thanks

Rob

[file014]

Yes you need to add LSD additive. The factory stuff should have been Equa-Torque. But I think you could use whatever Napa has or order some redline off the web. I dont think it will do any harm other than squealing until you put the additive in.

[senor_blueduck]

I'm such a dummy. Did a "search" on the forums and found about a million threads about rear diffs. Went to autozone, got a bottle of Trans-X fluid for LSD, put it in, did some donuts around the parking lot and the sound went away. Thanks guys