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Identify 4L80 Transmission Case Type

2:05
42:57
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At 2:05 in

Budget Turbo Yukon XL 4L80 Conversion: AN Line Conversion! Best Transmission Cooler Line Upgrade

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What happens here

Inspect the transmission case to determine if it is an early or late model 4L80. Early cases have both cooler line ports located close together at the front of the transmission, while late cases feature staggered ports (one at the front, one towards the rear). This distinction is vital for selecting the appropriate AN conversion fittings; mismatched fittings can lead to leaks or installation issues.

Goal: Determine if the transmission is an early or late model 4L80.

What they say

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go so now i just totally hit my head on the tire great this one came from the front this one came from the back now this is some really critical information here because there are two kinds of 4l 80s we'll learn you something today there is the early case that was bolted to the five sevens and the 454s like before the ls motor came out and then there was the later case and there's minor differences between the two internally which i'm not going to get into because i don't really understand it completely but the easy way you can tell is the earlier ones do not have a tippy top hole in the bell housing and the cooler lines how this later case has them stagger like this one on the front one on the back the early case has them both right here

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