2008 Dynatrac rear full float hub seals leak
This is the second time I had to shorten a road trip due to leaks developing at the rear hub seals. I had a reputable mechanic replace the seals the first time but here I am 15k miles later with another leaky seal. I did some web searching to see what could be causing the problem so I can have the mechanic check during repair.
A few questions. The last mechanic replaced the seal with a Napa 28426. The Dynatrac parts list I got with my SMB purchase calls for a DA60-1175-A which I have not been able to cross ref to any other mfgr part no. It also lists what I believe is a Timken part no. 2081. Should I go with the Timken over a Napa replacement?
I plan to have the mechanic inspect the wheel bearings for wear. I also have the Timken part nos. for the bearings in case they need replacement. I read that heat build up could contribute to seal failure so maybe that is the cause.
Should the wheel bearings be packed when put back together? I read that even though diff lube reaches the bearings they should still be packed with wheel bearing grease. If so, any recommendations for type of grease? I've been running Amsoil Severe Gear 75-140 in the diff if that is a consideration.
I plan to have the mechanic check for a clogged diff breather because I read that can also be a cause of leaky seals.
I noticed a bit of seepage from where the drive axle shaft bolts to the hub (8 bolts). Should some sort of gasket material be used to prevent this? Or perhaps it just was not tightened enough. Are there torque specs for the 8 bolts?
Any other suggestions for what could be causing the seals to leak? Any links to info on my particular rear end (2008 Ford limited slip converted to full float by Dynatrac) is appreciated. Or if someone knows of a knowledgeable contact at Dynatrac and has their number to share.
2008 SMB 4WD Diesel RB50 w/PH, basement, full float rear, ARB Locker front, Aluminess on both ends, winch, compressor, & 2 solar panels.