Output Axle Seal Kit – 1108557-00-A

Drive Unit Output Shaft Seal – Front Raven Model X

This drive unit output shaft seal is the correct OE‑style repair for the front Raven drive unit on Tesla Model X.
It matches the factory specification of 1108557-00-A, and is stocked under Gruber part number 43-MX-AXELSEAL. Use it whenever oil seepage appears at the axle/output interface to restore proper lubrication containment and protect internal components from contamination.

Why these seals fail

• High torque loads – EV torque pulses and steady use flex the sealing lip against the shaft over time.
• Heat & aging – Repeated thermal cycles harden the elastomer and reduce its sealing capability.
• Contaminants – Road debris or fine particles can abrade the shaft or bore surface, undermining the seal.
• Installation issues – Off‑center or over‑driven seals deform and leak prematurely if proper tools or technique are skipped.

Our solution

• Exact OE-style geometry – Matches Tesla’s dimensions for the front Raven housing, giving a precise press fit.
• Correct shaft interface – Designed for the Raven output shaft to maintain uniform contact and minimize leakage risk.
• Leak-stop repair – Targets the common failure point at the drive unit output before fluid loss or contamination worsens.
• Shop & DIY friendly – Ideal for independent shops and experienced owners during Raven front drive unit service.

Service & coverage

Stocked and shipped from our EV parts facility when available, with fast delivery options. Recommended whenever the front Raven Model X drive unit is opened for service or when any signs of oil at the axle output are observed.

Installation note

Use the correct tools and follow proper procedure to seat the seal fully flush. Tesla’s official procedure for the 3DU rear drive unit specifies applying lubricant to the halfshaft, then using the seal install tool to tap the new seal until it is flush with the drive unit casting. Though that procedure references the rear drive unit, the guidance on lubrication and fully seating the seal applies to Raven front units as well—proper seating is critical to avoid deformation or leaks.

In EV driveline communities, users have reported real‑world leaks on certain aftermarket seals during multi‑hundred‑mile use, highlighting the importance of correct seal choice and clean installation. One discussion observed leakage from one brand’s seal after ~300 miles, whereas another combo remained dry after ~800 miles, underscoring how critical both the seal quality and fitment method are.