After flush make sure to install a transmission cooler to keep the temperatures down during summers off roading or doing hills. Its a omission by the company thats inexcusable for a vehicle of this category. Shudder is usually the glazing of the torque converter or the failure of friction modifiers in the ATF due to heat and breakdown. Replenishing with new oil fixes it if the clutch is not badly damaged. I use a Hayden 679 but anything of that size from Trucool or Derale will work equally well.
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