Univ Trans Dipstick GM TH350/TH400

The TCI Universal Transmission Dipstick for GM TH350/TH400 is an essential diagnostic tool for any serious transmission builder or DIY mechanic working with classic and late-model General Motors automatic transmissions. This dipstick is particularly useful when performing a complete transmission overhaul, servicing a freshly rebuilt unit, or troubleshooting fluid level issues.

TCI's engineering approach delivers a precision-machined dipstick that interfaces seamlessly with factory and aftermarket transmission pans, providing consistent measurement accuracy at operating temperature and cold sump states. Constructed to withstand repeated insertion cycles and exposure to hot transmission fluid, the dipstick features clear, easy-to-read markings that eliminate ambiguity during fluid checks—a critical detail when tuning shift firmness or verifying fluid level after a fresh fill.

Mechanics and transmission rebuilders will appreciate the universal design that accommodates the geometric differences between TH350 and TH400 applications without requiring multiple part numbers. This simplifies inventory management for shops and enthusiasts alike, ensuring that you always have the right tool for the job.