I have an 04 GMC 6.0 with the 4L80 trans, which is a great transmission in its own rite. I recently bought an 04 Silverado with the 8.1 and Allison. Comparing the two, I really appreciate the braking that I feel in the Ally! I feel confident that I can pull our camper without the fear of losing a transmission.
I just got an 8.1 Allison , my favorite truck I ever had … it really is the best transmission ever put in a truck . I wasn’t sure all the hype was real but now I know.
I have an 04 GMC 6.0 with the 4L80 trans, which is a great transmission in its own rite. I recently bought an 04 Silverado with the 8.1 and Allison. Comparing the two, I really appreciate the braking that I feel in the Ally! I feel confident that I can pull our camper without the fear of losing a transmission.
I just got an 8.1 Allison , my favorite truck I ever had … it really is the best transmission ever put in a truck . I wasn’t sure all the hype was real but now I know.
Strange I get the same clunk on my 2001 but mine is 6.0 automatic.
I got two lb7s one with the rare manual transmission and one with the allison and funny enough the allison is only one digit off from my zf6 duramax