Transmission Filler Flap Pair for 1966-1969 Oldsmobile Cutlass Supreme

A correct filler flap closes the kind of opening that quietly makes a car feel ?unfinished.?

Block road splash and grime from the firewall and tunnel area.
Help reduce drafts, fumes, and underbody noise.
Protect hidden seams that like to rust first.
Restore a factory-style seal where the chassis meets the body.

Upgrade your transmission with a durable filler flap from Collectors Auto Supply! Available in multiple colors, it's compatible with various models. Order now!

Specifications:

Material: Transmission Filler Flap
Vehicle Fitment: Please see compatibility chart or give us a call to confirm

Q: What is a transmission filler flap?

It closes an opening near the lower firewall/frame area to help block road splash, dirt, and fumes from entering the underbody and tunnel area.

Q: What problems show up when it is missing?

You can get more grime buildup around the tunnel and firewall area, plus increased noise and airflow through gaps.

Q: Are there other names for a transmission filler flap?

You may see it listed under lower firewall and tunnel sealing terms.

Transmission dust shield
Firewall filler flap
Floor pan flap seal
Tunnel splash shield
Frame-to-firewall flap

Names vary by manufacturer and OEM terminology.

Q: Does this help with cabin comfort?

Yes, sealing lower openings helps reduce drafts, fumes, and road noise that creep up through the tunnel area.

Q: Any install tips or cautions?

Confirm placement and orientation before fastening, and test-fit so it lays flat and seals the opening evenly.

Why You Should Ride With Us?

You can purchase this product directly from Collectors Auto Supply, where we specialize in classic car restoration parts and accessories. Finding the perfect part for your classic car can be difficult, and even frustrating. And let us be honest. What makes it worse is a general lack of customer love in the industry. That is why we are here, and that is why we are different. We are car people just like you, and we know what you need. And if we do not already know it, we're listening. So, contact us if you need help finding a part, or have an idea for how to improve our website, or anything else. Or if you want to do it the old-fashioned way, give us a call at 1 (800) 414-4462.