HAHAHA TH350/TH400 Transmission Dipstick — Firewall-Mounted Silver with Stainless Braided Hose and Clear Scale

The HAHAHA TH350/TH400 firewall-mounted Flex Transmission dipstick is a direct-fit replacement dipstick with a stainless braided hose designed to fit GM/Chevy Turbo 350 and Turbo 400 transmissions for accurate oil-level checks and a tidy firewall installation.

When upgrading or repairing a Turbo 350 (TH350) or Turbo 400 (TH400) transmission, a firewall-mounted dipstick with a flexible stainless-braided hose keeps the engine bay organized and makes fluid checks simpler. This HAHAHA-branded dipstick assembly adapts to GM/Chevy installations, offering a durable hose, clear oil level markings, and an installation layout that routes through the firewall for cleaner lines and easier access than stock dipsticks in many custom or swap applications.

How does this dipstick make transmission checks easier?

The firewall-mounted design positions the dipstick near the back of the engine bay, giving better access without crawling under the vehicle. A flexible stainless-braided hose can be angled to suit your firewall routing, and the marked dipstick provides quick visual confirmation of fluid level.

• Firewall location reduces reach and improves convenience.
• Flexible hose adapts to different chassis and swap setups.
• Clear scale lets you read fluid level at a glance.
• Removable for fast maintenance without disassembling other components.

Will it fit my TH350 or TH400 transmission?

This dipstick is engineered specifically to work with GM Turbo 350 and Turbo 400 transmissions, providing a fit that closely matches OEM dimensions for these models. Verify the transmission type and firewall hole size on your vehicle before installing.

• Compatible with TH350 and TH400 transmission cases.
• Designed to align with factory-style fill/level ports on GM/Chevy units.
• Flexible hose accommodates slight position differences during swaps.
• Check transmission model stamping and inlet angle before purchasing.

What are the construction and durability features?

The assembly uses a stainless braided hose for abrasion resistance and a robust dipstick tube connection to resist vibration and heat. Materials and construction are chosen for continued use in high-performance or daily-driving environments where repeated checks and road vibration occur.

• Stainless braided hose resists chafing and oil exposure.
• Secure fittings reduce the risk of leaks at the firewall interface.
• Scale markings remain legible for accurate readings over time.
• Built to meet or exceed typical OEM fit and performance expectations.

How simple is installation and maintenance?

Installation is straightforward for mechanically inclined installers: route the hose through an existing or drilled firewall hole, attach to the transmission fill neck, and secure the dipstick. Routine service is fast—pull the dipstick, wipe, reinsert and read—without complex disassembly.

• Designed for easy firewall routing and secure mounting.
• Can replace worn or damaged original dipsticks with minimal tools.
• Removable assembly speeds fluid checks and servicing.
• Supports routine maintenance intervals without special equipment.

Who is this for: This HAHAHA firewall-mounted Flex Transmission dipstick is ideal for owners and builders working with GM TH350 or TH400 transmissions who want a cleaner engine-bay layout, easier dipstick access, and a durable hose that withstands performance driving and frequent checks. It suits restoration projects, engine swaps, street rods, and daily drivers where firewall routing or custom fitment improves serviceability and appearance.