I have 1984 300D turbo. It is 3 speed automatic transmission. My transmission is not shifting from second to a third. All other gears are shifting smooth.
Vacuum is good,oil level is OK.
Any idea what to look for.
Thanks

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'95 s500 (bought for wife but can't bear to share!!!) 125kms
'92 legend 180kms
'88 tbirdturbo(fantastic car-only regular maint.)120kms
'87 mustang gt(gone)
'86 tbirdturbo(gone)
'85 mustang gt(gone-but not forgotten)