• Master kit for servicing the front and rear crankshaft seals on 2001-2016 6.6L Duramax diesel engines
• Includes CTA 3878, 3879, 4042, 4043
• Installers properly fit the inner and outer seal bodies while the removers use controlled force and jaws to prevent seal and engine damage
• Services GM, Isuzu, and GMT800 HD trucks needing front and rear crankshaft seal removal and installation
• Compare 3878, 3879, 4042 and 4043 to GM factory tools J-44642, J-44645, J-44641 and J-44644
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