No you didn't if you are accurately describing the condition. Since you don't have an electronically controlled transmission there isn't a "limp mode". No speed sensor signal will result in no 4th gear shift but it has nothing to do with the 1/2 or 2/3 shift. Please try to accurately describe the condition you are trying to fix if you want accurate information to fix it.


"Follow me the wise man said, but he walked behind"


'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion.
'74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost conversion.
2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.