ProForm TH400 Transmission Locking Dipstick & Tube — Direct-Fit Replacement with Locking Cap

The ProForm 66182 TH400 Locking Dipstick and Tube is a vehicle-specific transmission dipstick assembly engineered to secure, measure, and simplify fluid checks on TH400-equipped vehicles.

Designed for gearboxes that use the Turbo-Hydramatic 400 (TH400) family, this ProForm dipstick and tube set replaces factory units with a locking cap to prevent leaks and contamination. The kit is a direct-fit, vehicle-specific auto accessory that helps you get accurate fluid readings while keeping the transmission fill area sealed during driving. Built for durability and everyday shop use, it is sold under part number 66182 (037995661824) and ships in a compact package sized 28.5 x 6.5 x 2.5 inches.

How does the locking feature improve regular transmission maintenance?

The locking cap prevents the dipstick from backing out under vibration and keeps road grime and moisture from entering the transmission. That reduces the chance of false readings and helps preserve fluid cleanliness between checks.

• Positive lock mechanism keeps dipstick seated while driving
• Seals out dirt and water to protect fluid integrity
• Stable placement gives repeatable fluid level readings

Is this dipstick easy to install on TH400 transmissions?

Yes — the ProForm 66182 is made for vehicle-specific replacement, so installation is straightforward for anyone familiar with transmission servicing. It mounts in the original tube location and uses common fasteners, making it suitable for DIYers and professional shops alike.

• Direct-fit design for TH400 applications
• No custom bending or cutting required for proper alignment
• Clear markings simplify fluid level checks after installation

What materials and packaging details should I expect?

The assembly comes packaged to protect its finish and fittings, and is constructed to withstand under-hood conditions. Though compact, the package contains the complete dipstick and tube assembly and ships with the weight and dimensions specified for secure transport.

• Package weight roughly 15.345 pounds for safe handling
• Shipping dimensions: 28.5 x 6.5 x 2.5 inches
• Durable construction designed for engine bay exposure

Will this part work with my vehicle model?

ProForm markets this item as a vehicle-specific fit for transmissions in the TH400 family; confirm compatibility by cross-referencing your vehicle’s transmission type and the part number 66182 (037995661824). If your car or truck uses the TH400 transmission, this dipstick set is intended as a direct replacement option.

• Check that your vehicle is equipped with a TH400 transmission
• Confirm part number 66182 / 037995661824 before ordering
• Contact ProForm or consult fitment guides for model-year specifics

Who is this for: The ProForm 66182 locking dipstick and tube is aimed at mechanics, restorers, and vehicle owners who maintain cars or trucks with the TH400 transmission and want a secure, repeatable way to check fluid level. It suits professionals seeking a reliable replacement part and DIY enthusiasts doing transmission service, especially when preventing contamination and ensuring correct fluid readings matters.