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Discussion Starter · #1 ·
Same issue as other posts, 4wd not working in reverse. Changed diff oil, was dark , replaced with Amsoil diff oil. No change, all works as it did, indication " slow" four wheel symbol appears when over ride button is engaged. AWD works in high/low forward all tire spin.
Traced the wires from differential to the connector , took apart tested wires from AWD switch , 12 volts on grey wire when turned on, nothing on br/wh with no reference to ground. Is this wire a ground?
 

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2017 Sportsman 850SP
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You need to press and hold the override button for AWD to work in reverse, otherwise you just get 2WD.
 

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How about you let us know what machine we're working on first. I don't know of any "slow" indication on the dash. Also, how do you know AWD is not working in reverse?
 

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Assuming you know this, but in case you don't, the AWD only works if needed. If the tires aren't losing traction they won't all get power. Like Gmartino said, what process are you using to confirm it is not working.
 

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Discussion Starter · #10 ·
I'm totally stumped! Every thing looks good. I don't have the wiring diagram, trying to figure out what happens when the override switch is engaged? The slow symbol appears and 4x4 symbol.
There is two wires br/wh & grey from front differential to speedometer area.
What triggers the 4wd reverse?
Snows on its way, can anybody help!
 

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19’ 850SP Camo. MtAiry Maryland
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Tks for everyone who has replied!
If the cage is broken on the front differential would forward 4wd be still working? I'm thinking no.
Going to try a front differential flush next.
Well that’s what I was thinking too, a cracked cage usually leaves forward AWD either not working or partially working at best.
 
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