Gear Train Assembly Archives - Transmission Digest
Too Close For Comfort: Pinpointing 4L60E Gear Train Assembly Problems

Let’s take a look at a common 4L60/65/70E scenario. During assembly of the transmission, the technician has difficulty installing the output shaft snap ring (Figure 1), or while checking the input shaft endplay finds that it is too tight or too loose (spec is 0.005″ to 0 .035″). The technician tears the unit back down to inspect for an (assumed) assembly problem, but cannot seem to figure out why the stack-up is not working.