Just bought 2022 mule pro fxt eps. Took it for a test ride prior to heading to our mountain home for summer. On steep down hill grade in 4 wheel low engine brake releases (I read this is normal). Second attempt held lightly on throttle to keep just above idle. Engine brake held but still kept speeding up (reached 16mph) so have to use brake and gas peddle simultaneously. My previous Teryx 4 would hold the mountain all day in low gear without touching anything. Is there a fix for this? I've never been on any forums before so excuse poor etiquette if I've placed this incorrectly I'm just at my wits end with this.