6L80 Assembly PT1 - Subassemblies (DEMO) - Please Read Description

** This video (part 1 of a two-video series) shows the reassembly of a 6L80 CORE that will NOT be going back into a vehicle thus no new parts were used that would otherwise be installed**

I reassemble a 6L80 to demonstrate the assembly process, starting with the pump and working my way through the rest of the sub-assemblies. Along the way, I provide some commentary and advice for performing a complete overhaul on these units, including parts selection, specialized machining and reconditioning as well as considerations for high performance. I also offer tips and tricks on assembly, discuss special tooling and show a few improvised methods and work-arounds for some hard-to-find and/or very expensive specialty tools.

I figured I'd get something on the channel for now in the event anyone needs some insight into the assembly process while I wait for a high-performance build to come in.

*** It's recommended you retro a second design stator-pump cover assembly that was introduced in mid-2009 onto any 6L80E pump body/bell housing that came with the first design stator (2006-E2009) - see below.

6L80 Key Lifecycle Updates
mid-2007: Low sprag one-way clutch updated from 30 to 38 elements for increased durability

mid-2009: Stator redesigned to accept locking sealing rings support o-rings underneath sealing rings to improve sealing integrity against 3-5-R drum (referred to as '2nd design stator')

2010: 1-2-3-4 apply piston redesigned to reduce clutch failure due to the piston cracking; issues were still reported but not as frequent. Recommend installing Sonnax billet aluminum piston for all years

2012: Unigear style ring gear for output planetary carrier - rear speed sensor also changed to coincide with transition to unigear design.

2014: Eighth check ball added to upper valve body; separator plate redesigned (2010+ can use extra check ball if updated separator plate is installed)

2018: Parking rod and bullet assembly hardness improved to prevent failure resulting in driver inability to place vehicle into park

More details: https://atracom.blob.core.windows.net...

Parts List for All 6L80 Rebuilds:
https://www.tahoeyukonforum.com/threa...