Da 38 8 track audio

I highly doubt if an mechanism assembly is available. You will most likely need to get to the mechanism and see whats not letting or making the take up reel turn. You could contact the TASCAM Operational Support Specialists at 323-727-7617 (M-F, 8am-5pm Pacific). You should be in front of your equipment so that any suggestions given by the product specialist can be implemented immediately, and to hopefully avoid subsequent phone calls on the same issue. It's also helpful to be familiar with the operation of your product as well as any associated equipment used with your TASCAM product