{"product_id":"hahaha-th350-th400-firewall-mounted-flex-transmission-oil-dipstick","title":"HAHAHA TH350\/TH400 Firewall Mounted Flex Transmission Oil Dipstick","description":"\u003cp\u003eIn this review the HAHAHA TH350\/TH400 firewall mounted flex transmission oil dipstick is evaluated for drivers who need a neat, firewall-mounted replacement for GM TH350 or TH400 transmissions. The bottom line: it is best for hobbyists and mechanics who want a clear, easy-to-read dipstick that installs without relocating the factory tube. The reviewer found installation straightforward, the fit reliably accurate on matched applications, and durability reasonable for daily use, though a few users reported mixed impressions of construction and one reported persistent leakage.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFirewall Mounted Design:\u003c\/strong\u003e Places the dipstick at the firewall for easier access on modified or tight-engine bay layouts and avoids routing issues with the factory tube.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered to fit GM TH350 and TH400 transmissions so it can replace worn or damaged original dipsticks on those units.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClear Scale:\u003c\/strong\u003e Features an easy-to-read marking scale that helps deliver accurate oil level readings at a glance during routine checks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Quality Construction:\u003c\/strong\u003e Built from materials meant to resist typical underhood conditions and provide a longer service life than some generic replacements.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy Maintenance:\u003c\/strong\u003e The dipstick can be removed and reinstalled quickly, making frequent transmission checks and top-ups simple.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReliable Performance:\u003c\/strong\u003e Designed to meet common OEM fit expectations so installation and operation are predictable for most users.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThis dipstick is aimed at car owners, restorers, and performance enthusiasts working with GM TH350 or TH400 transmissions who want the convenience of a firewall-mounted dipstick and a clear reading scale. It is particularly useful when the original dipstick tube is damaged, hard to reach, or when custom engine\/transmission setups require a relocated fill\/check point.\u003c\/p\u003e\u003cp\u003eIt is not ideal for users with transmissions other than TH350\/TH400 or for those who need a guaranteed leak-free solution under extreme racing conditions; a sealed or purpose-built racing filler may be preferable for sustained high-pressure, high-heat environments.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eFits TH350\/TH400 applications cleanly and gives a secure, direct replacement for the original dipstick.\u003c\/li\u003e\n\u003cli\u003eClear, readable markings make routine oil checks quicker and reduce guesswork.\u003c\/li\u003e\n\u003cli\u003eFirewall mounting reduces routing complexity in modified engine bays and improves accessibility.\u003c\/li\u003e\n\u003cli\u003eEasy to remove and reinstall for maintenance tasks.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSome customers reported mixed impressions of overall build quality, and one report noted a persistent leak, so mating hardware and seals should be checked during installation.\u003c\/li\u003e\n\u003cli\u003eNot suitable if you need a specialized sealed racing fill or a dipstick for non-GM transmissions.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eHAHAHA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits\u003c\/td\u003e\n\u003ctd\u003eGM TH350 and TH400 transmissions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMount Type\u003c\/td\u003e\n\u003ctd\u003eFirewall mounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Use\u003c\/td\u003e\n\u003ctd\u003eTransmission oil level checking and filling\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKey Feature\u003c\/td\u003e\n\u003ctd\u003eClear, easy-to-read scale\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaintenance\u003c\/td\u003e\n\u003ctd\u003eRemovable for quick checks and replacement\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThe HAHAHA TH350\/TH400 firewall mounted flex transmission dipstick is a practical, value-oriented replacement for owners of GM TH350 and TH400 transmissions who need better access and a clear reading scale. It performs well in most street and light-performance applications, offers straightforward installation, and represents good value for routine maintenance, provided you check seals during fitment.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eWill this dipstick fit my transmission?\u003c\/strong\u003e\u003cbr\u003eIt is designed specifically for GM TH350 and TH400 transmissions; it will not fit other transmission families.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes it require special tools to install?\u003c\/strong\u003e\u003cbr\u003eInstallation is generally straightforward and does not require special tools, but you should confirm proper sealing hardware is used to avoid leaks.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the scale easy to read while hot?\u003c\/strong\u003e\u003cbr\u003eThe clear scale is intended for quick checks and is readable during routine use, though ambient light and oil staining can affect visibility over time.\u003c\/p\u003e","brand":"HAHAHA","offers":[{"title":"Default Title","offer_id":48675192275163,"sku":"B0CKDV9XG8","price":35.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/619nEZ9T6FL._SL1500.jpg?v=1778715392","url":"https:\/\/gearmusthave.com\/products\/hahaha-th350-th400-firewall-mounted-flex-transmission-oil-dipstick","provider":"GearMustHave","version":"1.0","type":"link"}