Car not going into fourth gear.
If the transmission linkage is not the cause, then the internal transmission gears would need to be checked to see if the blocker rings are damaged. This would require the transmission to be removed and disassembled. I recommend seeking a certified mechanic, such as one from YourMechanic, come and test your vehicle for you to check all the linkages for a diagnostic of your car’s shifting issue.
Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing