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My old boss in Dayton made me pick: rebuild the 4L60E myself or drop $1,800 on a reman
Back in February a customer's 2004 Silverado came in with a slipping 4L60E and my boss gave me the call, rebuild it in house or order a reman for $1,800 and eat the core charge. I went with the rebuild, watched the teardown video like 6 times, and spent 14 hours on the bench chasing a stuck 2-4 servo piston that turned out to be a burr in the bore. Trans shifted fine after, but I only made about $22 an hour on the whole job once you count the parts chasing. Anyone else had good luck rebuilding these or do you just eat the cost and drop in a reman every time?
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jordanc3216d ago
That stuck 2-4 servo piston sounds way too familiar, I fought the same thing on a 4L65E and it turned out to be a tiny burr in the servo bore too. What saved me was honing the bore with a brake cylinder hone on a slow drill and then polishing it with some 600 grit wrapped around a dowel. After that the piston dropped in smooth with no hang up at all. I also started laying every valve body part out on a big white towel in the exact order it came apart, because I lost a check ball once and spent two hours on my hands and knees. My rule now is if the unit has more than 150k on it or the fluid looked burnt, I push for a reman, because the hidden stuff like worn bushings and a tired pump will eat your profit every time. Fresh units with decent fluid and a known history are worth rebuilding, but you have to price the job like the problem part might show up, not just the basic kit.
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