In contrast to the rear,when installing a Carli diffguard we serviced the front fluid @ 15,000 and it was like new. It spins but unless engaged,it apparently doesn't generate much heat. The diffguard won't fit with a Mag-Hytec.
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'07 2500 SLT,5.9,reg.cab.,G-56, 4wd,8' Northstar popup 24/7. Carli,Defiant,Kore,Lorenz and MADS.