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Message: <blockquote data-quote="stutaeng" data-source="post: 27763" data-attributes="member: 6175">Your lines were full of debris?! Clutch material? Do you have any transmission codes?Yes, both the 4L60e and 4L80e have the same diameter, both around 3/8" IIRC. But different routing, etc.I would suggest you either flush or replace the auxiliary cooler and/or radiator if you had a lot of clutch material. I flushed my radiator engine oil cooler on my 06 Suburban. I'd rebuild the engine and to get it running and on the road again, just installed a block-off plate I had laying around and my cooler lines had started to seep oil...well, I didn't cap the radiator ports and it was like 6 months before I ordered replacement lines.I was worried about contaminants that got inside the radiator, so cut off an old cooler line end and cut threads on one end to match the cooler clean can. I cut another old cooler line and just ran clear vinyl tubing to a catch can with hose clamps. Run the entire can of the cooler cleaner, then follow by blasting it with compressed air until everything is nice and dry. Not the same as those professional machines that pump the cleaning solution back and forth, but better than nothing and very inexpensive.[URL unfurl="true"]https://www.napaonline.com/en/p/BK_7652614?srsltid=AfmBOoo4L_95wttcjic38YAM56-Va_bSUDhaCD6nd-KryEOCKgq4xZnH[/URL][ATTACH=full]5568[/ATTACH][ATTACH=full]5569[/ATTACH]</blockquote>