Why does my JLG 943-A telehandler lose power in second gear?

[jonathan Morris]

My JLG 943-A moves fine in first gear, but when I shift into second, it loses power, slows to a crawl, and eventually stops. Where should I start troubleshooting this JLG 943-A transmission or power issue?

 

[Big_Iron]

Has the machine thrown any fault codes or shown any other symptoms recently?