I have a 1995 Chevy K1500 with a 4L60E. I replaced the transmission and about 3 months of running great it just started messing up. It only stays in 1st gear and goes about 25 to 30 mph at 4000 rpm. I manually shift it but any gear it stays the same. The reverse works great. I replaced the 1-2 shift solenoid but it didn't help. Any suggestions on what to replace next.
codes.. codes codes...which connector do you have under the dash board???i have several models of scan tools so i usually don't have a problem pulling codes... 95s usually require a scan tool....i have heard that there is a way to jump other than the A and B terminals on the connectors..the transmission when the computer sees a problem shuts down the control of the A and B solenoids and that leaves you with 2nd gear.. there are a bunch of professional transmission guys who drop in here and i will turn you over to them.. but they are going to ask for codes... and that is how its done unless you want to just keep changing parts.. there are a LOT of different reasons and not all transmission related that will stop it from shifting..