Casrram Transmission Output Tailshaft Cap Plug Kit — 5pcs for TH350/700R4/C4/Powerglide | Push-Fit, Reusable Seal

Casrram Transmission Output Tailshaft Cap Plug Kit is a five-piece set of durable tailshaft plugs designed to seal output yokes and prevent fluid loss and contamination on popular automatic transmissions like TH350, 700R4, C4, Powerglide, 2004R, AOD, and M5R2.

When servicing or storing transmissions, an easy, reliable seal for the tailshaft opening keeps gear oil contained and the work area clean. This kit includes five push-in tailshaft cap plugs made from resilient materials that resist deformation and provide a tight fit for common transmission output yokes. The simple plug-and-play design means no special tools are required — just press the cap into the shaft port to block leaks and keep dirt out while a transmission is on a bench or in a vehicle.

How does this plug kit protect against leaks during repairs?

The Casrram tailshaft caps create a physical barrier at the output yoke opening, preventing gear fluid from escaping and reducing the chance of oil dripping onto the floor or components. They also block entry of sawdust, metal shavings, and other debris that could contaminate internals during disassembly or storage.

• Five plugs for multiple transmissions or replacement spares
• Snug push-fit design to minimize fluid seepage
• Reduces cleanup and protects workbench and shop surfaces

Will these fit my transmission model and how universal are they?

This kit is specified for common transmissions including TH350, 700R4, C4, Powerglide, 2004R, AOD, and M5R2, and fits typical output yoke port dimensions used on those models. While designed for these popular types, confirm the port diameter on your transmission to ensure a proper fit before installation.

• Compatible with listed models: TH350, 700R4, C4, Powerglide, 2004R, AOD, M5R2
• Designed for standard output tailshaft port sizes on those transmissions
• Works as a workshop spare when swapping or rebuilding gearboxes

How easy is installation and removal?

Installation is straightforward: simply align the plug with the tailshaft port and press in until seated. Removal requires a gentle pry with a flat tool or pick to avoid damaging the plug — they’re made to be serviceable so you can reuse them during multiple maintenance sessions.

• Push-in installation — no tools required for fitting
• Removable with a small prying tool for reuse
• Saves time compared with makeshift sealing methods

What material and durability can I expect from these caps?

The plugs are manufactured from resilient, deformation-resistant materials intended to withstand contact with transmission fluid and typical workshop handling. They maintain shape under moderate mechanical stress and provide a reliable temporary seal during repair or transit.

• Durable construction that resists compression set
• Fluid-compatible material to avoid swelling or degradation
• Five-piece pack gives spares for repeated use

Who is this for: Mechanics, home-garage enthusiasts, transmission rebuilders, and restoration hobbyists who regularly remove, service, or transport automatic transmissions. If you need a quick, reliable way to keep gear oil contained, protect internals from contaminants, and speed cleanup during repairs, this five-piece Casrram tailshaft cap plug kit is a practical workshop accessory to keep on hand.