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rpmdiag
rpmdiag, Tech and instructor
Category: Transmissions
Satisfied Customers: 8151
Experience:  Since 1975
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Transmission not shifting I have the 1-2 3-4 shift and still

Customer Question

transmission not shifting I have the 1-2 3-4 shift and still don't work and the speedometer dose not work
JA: How old is the transmission? Have you noticed any leaking?
Customer: no
JA: What is the model/year of your Chevy?
Customer: 1994 g-20
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: I got another tran and it worked for a little while and it started to do the same thing my old one was doing
JA: Anything else you think the mechanic should know?
Customer: and the speedometer stop working
Submitted: 1 year ago.
Category: Transmissions
Expert:  rpmdiag replied 1 year ago.

Hi, welcome to Just Answer. I’m Ron and I’ll be helping you
today.
Before we get started though, Please understand that I don't know
your skill level or tools you have to assist us. Also understand that
I can't see, smell, hear, or touch the vehicle either, so patience is
appreciated. JA is a great Q/A site, but it does NOT replace a
repair shop.
My goal is to make you happy and get a great rating in return for
my time. Sometimes I have to give you bad news that I know you
didn’t want to hear, so please don’t shoot the messenger.

First let's test the computer with a scan tool and get the codes. There must be a code set for a speed sensor that can be causing all of this and NOT be a trans issue.

Thanks, Ron