Heavy Duty Transmission Speedometer Gear Housing Seal Kit For GM Th400 Th375 Th475 And 3L80E Stops Leaks Cold Grease Monkey Trusted Parts To Keep Your Build Rolling Fine Daily

GM TH375 TH400 Speedometer Seal Replacement Kit
✔️ Premium nitrile rubber seals, 304 steel bolts, stops

This transmission speedometer seal kit replaces worn gaskets to halt fluid leaks right at the gear housing. You order a single complete repair set built for manual and automatic drivetrains that demand dependable shifting performance during normal highway cruising or light utility work.

✅ Compatible with GM TH375, TH400, TH475, and 3L80E transmissions made in 1964 and later. ✅ Seats properly inside housings built for thirties to forties and forties to 45 tooth drive gears. ✅ Packages contain speedometer retainer, spring clip, O ring, inside rubber seal, and lock washer. ✅ Mounts securely with provided metric and non metric bolts alongside durable nitrile rubber seals.

💡 Why do classic box transmission speedometer gears lose calibration after heavy towing sessions?

Fatigue on the metal contact points slows down drive signals, making you guess your actual road speed while wading through messy drip pans in the shop.

- High grade synthetic elastomer holds shape to block seepage without shrinking overtime. - Threaded stainless fasteners clamp down tight to resist vibrating loose during quick launches. - A handy complete rebuild set takes the guesswork out of routine driveway maintenance jobs.✝️