2001 Suburban
10-23-2018, 11:22 AM
#1
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2001 Suburban I have a 2001 Suburban, Transmission has 1st 2nd,3rd and reverse that all shift normal, but it has no 4th or lockup. We replaced the old transmission with a used then have this problem Any ideas?
10-23-2018, 01:51 PM
#2
TECH Addict
Did you have the same problem with the old transmission that was replaced? Could be a worn 2-4 band. You can use the attached instruction to check the servo travel. You can use some type of pry bar to pry the servo cover in and measure the travel with a strait edge. Too much pin travel could cause no 4th gear. This would be an easy thing to check.
10-23-2018, 02:25 PM
#3
TECH Junkie
B bond has given some good info. I just need to mention that the extended pin is just a bandaid for an already present problem.
The band is worn and this may get you down the road for a little while longer but it's not the long term fix
The band is worn and this may get you down the road for a little while longer but it's not the long term fix