I had my Sp500 in the shop to have some work done. Then they said there was a grinding sound coming from the ADC but I never heard it. Should I be worried or is that kind of noise normal?

 

If you haven't changed the fluid in the front diff. for a while, I would start there. Even if you have, I would do it again. Sometimes you need to do it a couple of times to get everything flushed out with good, clean oil. Dirty oil in there will cause it to make a god awful grinding, about to self destruct, type of noise. You may also need to bleed the ADC system as well. Just be sure to keep the ADC reservoir topped off while bleeding.

 

Make sure that yur using the updated fluid #2877922 not #2876144. The 6144 wil make the ADC growl if slightly dirty. Shyster local dealer did it to me at a cost of approx. $ 1500.00.

 

Thanks for the replies. I got my quad back today and didn't hear any grinding when I parked it. I'll see how it acts after I leave on vacation tomorrow.

 

I dropped off my quad on the way home Monday and had them change to the updated fluid. I picked it up today and didn't turn the ADC on and there was no noise. They said it rattles when the ADC is on but I didn't want to try it. I guess I just won't use the ADC and hope it doesn't blow up. I only used it once in the last five years anyway.

 

Mine would growl occasionally on steep down hill grades where the suspension would squat a lot. I swore there was something wrong as it sounds terrible! Tore the front end apart to find everything was in perfect condition. I now run the updated fluid and also put the hd springs up front and never heard it again. one or the other fixed it?

 

Time for an update. I dropped my quad off at the dealer's after my 4th of July vacation and just got it back today. I knew the repair was way beyond my ability. It made a loud noise when it was in ADC but not the rest of the time. The fluid change didn't do any good. I just didn't use the ADC and rode it for a week or two without any problems. They replaced a male and a female ADC output hub assembly, whatever they are. The parts breakdown looks like some kind of clutch pack. They also replaced a half-shaft at no charge that they managed to screw up somehow. It was over $700 in parts alone and the total with labor was over $1,000. The little bit I use my quad it shouldn't have any problems.

 

Similar to motorcycle clutches,fiber and friction plates. Glad I retired before I had to get heavy into the adc diffs. The younger guys at the shop can have all they want now.#2 and #5 Dirt Cheap Yamaha, Honda, Arctic Cat & Polaris OEM Parts & Accessories – Cycle Parts Warehouse

 

Here is my personal experience with ADC on my 2008 Sportsman Touring.
When I first got the bike I loved the ADC but only used it when it was needed. It wasn't long before the grinding (clutch chatter is what it really is) started. Back then it was back and forth on the forums as to what caused it but when some gear cases were taken apart it was said the rivets were cut causing the clutch packs to come apart. The only way I found to stop the chatter was to change the oil often (when ever the chattering started) and did this for a year or so with some success. One day I was at the local Canadian Tire (only in Canada) and picked up a jug of their brand of tractor oil called TDH (transmission/differential/hydraulic). The thing that caught my eye on the label was it stated "reduces clutch chatter" so I figure if it works in the diff/trans/hyd system of a farm tractor why not in the front gear case of the Sportsman.
I changed out the oil put a few miles on and changed it again and have never had ADC grinding (clutch chatter) again(a few years now) and now only change the front gear case oil once a season.
In my mind the Polaris oil was prone to contamination (condensation) and broke down which cause the clutch packs in the ADC to chatter which in time will cause the rivets to fail and the packs coming apart resulting in the big $$ fix at the dealer. I also use this same oil in the transmission and presently have 12000kms (7500miles) on the bike to date.....

 

Good info. thanks.