My 01, 2619 has Dexter axles.
That website is
www.dexteraxle.com .
I was fortunate as I recently worked a trade show for one of our truck jobbers here in Portland, and got to talk with the Dexter axle rep who gave me a copy of the Dexter Axle, Operation Maintenance Service Manual for 600 to 8,000 lb axles & related Components. I now keep that with my TM owners manual. Lot of good info in there.
Gregg