When did my timing belt I noticed the fan clutch was leaking from the seal (orginal). I replaced that with the Hayden 2905. Less than 1000 miles later the Hayden is slinging fluid and the temp gage goes way up when pulling a hill. Are there quality issues with Hayden? If you have not done the split the fan shroud mod when you had the chance I feel sorry for you. So when the replacement gets here I get to go in again.
Specifics: temps, high 90's, 7000ft. elevation. no towing, 65 mph speeds. 95,000 miles. I can't wait to see if this turns into a head gasket issue.

Are you saying you pegged the gauge? Have you had the recalibration reflash? Did it defuel?

For future reference, if it EVER gets above 3/4, SHUT IT OFF! NO Exceptions....

DOC

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2005 KJ CRD Ltd Detroit TrueTrac Bilsteins G2 GDE "HOT" ECU GDE TCM "Tow Tune" "euro" TC SEGR Weeks Elbow New HG at 130K ARPs Clean CAT aFe Filter Magnaflow Exhaust EHM Cumminos In-Tank Lift Pump Hayden Fan Clutch Nylon Fan VH Enabled with GDE lower shutoff point Recalibrated Temp Gauge Tekonsha Prodigy Sears P-1 ZDDP

It has had the factory reflash. Did not peg the needle but went over 3/4. Cooled down to under 3/4 when I pulled over and let it idle. Put the orginal fan clutch back in and drove the next day, gage temps were much better pulling the hills. It did not defuel.