1977 GMC Suburban Differential Carrier C25 Suburban - RWD - GM 10.5 in. Full Float Rear - 14 Bolt Cover - Standard Open Carrier Case - 4.10 And Down Carrier Break - 4.125 in. Deck Height - Bare w/o Internal Gears - Rear guaranteed to replace your current 1977 GMC Suburban Differential Carrier C25 Suburban - RWD - GM 10.5 in. Full Float Rear - 14 Bolt Cover - Standard Open Carrier Case - 4.10 And Down Carrier Break - 4.125 in. Deck Height - Bare w/o Internal Gears - Rear. 1977 GMC Suburban Differential Carrier comes new OEM 1977 GMC Suburban Differential Carrier aftermarket new 1977 GMC Suburban Differential Carrier of remanufactured 1977 GMC Suburban Differential Carrier C25 Suburban - RWD - GM 10.5 in. Full Float Rear - 14 Bolt Cover - Standard Open Carrier Case - 4.10 And Down Carrier Break - 4.125 in. Deck Height - Bare w/o Internal Gears - Rear.