Harvey Esteban Member Messages 59 Sep 15, 2026 #1 My Cat 621 transmission was recently rebuilt and has about 20 hours on it. Some gears grip at low RPM but start slipping as engine RPM increases. Should I check transmission pressures or internal adjustments?
My Cat 621 transmission was recently rebuilt and has about 20 hours on it. Some gears grip at low RPM but start slipping as engine RPM increases. Should I check transmission pressures or internal adjustments?