How much Instant Shudder Fixx should I use when addressing the persistent and vexing issue of transmission shudder in my vehicle? Is there a specific quantity or dosage one should adhere to, considering the varied conditions under which vehicles operate? Moreover, could the frequency of application play a pivotal role in the efficacy of this solution? Should I assess the severity of the shudder before determining the appropriate amount to use? What if my transmission has been subjected to prolonged periods of distress—would that necessitate a different volume of the product? In relation to vehicle models and their idiosyncratic requirements, might there be a guideline or recommendation that varies significantly from one manufacturer to another? Could environmental conditions also influence how much of this fix I should apply? Ultimately, what nuances should be considered to ensure optimal performance while safeguarding the longevity of my transmission system?