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Contributor. 1 Answer. Re: Why transmission won't work in reverse. That transmission is a 4L80E a pretty hefty transmission.The reverse band is probably slipping or broken,or you may have some broken hard parts i would be checking the shifter cable adjustment first see how that goes goodluck.
Here we will run through the basics of reverse operation. It is best if you are reading through this article while disassembling a gearbox real-time. Important things to note: - There is no neutral in this style of gearbox. - The default mode of operation is FORWARD. - Forward is 1:1 ratio. First, lets go over the components of reverse.