Automatic transmission partly not working

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Joined
Jul 14, 2023
Messages
182
Reaction score
140
Location
Germany
My Car
Mustang Mach 1 Fastback 1973
Hello dear friends, finally it starts again! I started the new season today.

The Mustang is taking on more trains and is almost finished. However, I noticed today that the car can ALWAYS be driven in reverse gear, but sometimes all forward gears, i.e. ‘D’, 1 and 2, do not react immediately or not at all. This does not change even when I press the accelerator. The engine revs up but the gears do not seem to engage. However, this is not reproducible when driving in reverse, where the car goes directly backwards as it should. If I then switch back and forth a little, it can happen that, as if by a miracle, the car then moves into ‘D’ and 1 or 2. But then usually with a ‘big jolt’ forward. I checked the linkage and cables and everything is fine there. I had refilled the automatic transmission fluid, but everything looks good there too. Any ideas what the problem might be? Defective signal, defective cable?
 
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