Case 1816 has forward but no reverse on just the right side.

[Rixls6]

I just bought this Case 1816 with the Onan engine and I'm having trouble with the right side drive only when using reverse. Works fine using forward.
The left drive works fine in both forward and reverse.

 

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I just bought this Case 1816 with the Onan engine and I'm having trouble with the right side drive only when using reverse. Works fine using forward.
The left drive works fine in both forward and reverse.

Did you find the problem? I have a similar issue on the right side with no forward or reverse after it warms. The left side works as it should. So if you solved it let me know. Thanks