When you say you had a computer chip, I assume you mean that you used a scan tool to check for codes?
If that is correct and you have no codes but no reverse, then we need to start with checking for proper fluid level and condition.
Here is a guide that will help with this:
https://www.2carpros.com/articles/how-to-check-and-add-transmission-fluid
Once we know the fluid is the correct level then we will need to check the pressure when in drive and in reverse.
I am attaching the test port below which will be needed in order to find out the pressure.
Let's run through this and let me know what you find.
Thanks
Image (Click to make bigger)
SPONSORED LINKS
Saturday, May 21st, 2022 AT 12:17 PM