Need help with Admiral record changer

[snows]

I got this Admiral 5D32D radio and record changer RC624 that pick up at a estate sales. I got the radio working and everything on the record changer works accept When it gets close to the trip area it starts hanging up and skips backwards a little and when it get to the trip area it won’t trip I can get it to trip but it won’t on its own.
I got the service manual and when over it and can’t seem to find the problem
Also I got a new needle and it does it on all records.
If anyone can help I would appreciate it.
Thanks