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1. P

   Series 80 engine rebuild or swap options?

   I don't know anyone with enough miles on one to say seeing as they are so new. I'm guilty of grouping them in with the 4l60e/65e/70e as I see them as the factory offering all the same upgrades done when rebuilding an earlier transmission.

   • Words: 46
   • PIP
   • Post #81
   • Nov 26, 2023
   • Forum: 80-Series Tech
2. P

   Series 80 engine rebuild or swap options?

   IMO, 4L80E first gear is not very great and 4L60E/70E/75E are hit and miss. Some guys can get 400K miles from one and others go through one every 30K miles. I don't know what makes the difference, but I am not one of the guys that has seen a long life from a GM automatic. I would lean towards...

   • Words: 88
   • PIP
   • Post #76
   • Nov 25, 2023
   • Forum: 80-Series Tech