Transmission Mount
Changing what sits behind the engine can create a mounting problem long before the vehicle moves under its own power. The transmission has to land at the correct height and position within the chassis, with a mount and crossmember suited to the drivetrain and vehicle. POL offers individual mounts, tubular crossmembers, conversion hardware, and complete mounting packages for classic cars and trucks.
Transmission Mounts and Crossmember Solutions
A transmission mount and a transmission crossmember solve two different parts of the same problem. The mount isolates and secures the transmission itself, while the crossmember carries that mounting point across the chassis.
That distinction creates two clear sides to this collection. Rubber and polyurethane mounts support common GM transmissions such as TH350, TH400, 700R4, 4L60E, Powerglide, and Muncie four-speeds, with separate Ford options covering another group of drivetrain combinations.
Crossmembers are vehicle-specific because they must span the frame correctly. Chevy and GMC trucks are divided across 1947-59, 1963-72, and 1973-87 generations, while Ford F-1/F-100, Chevy II/Nova, and Tri-Five Belair applications use their own chassis-specific designs.
The 1955-57 Belair shows how far that distinction can go, with Economy, Deluxe, convertible-specific, and side-mount conversion configurations. Mustang II-equipped trucks add another layer by combining engine and transmission support with a front-suspension layout that has already changed the original chassis arrangement.
FAQ
What transmission mounting parts does POL currently carry?
The collection contains 27 products, including rubber and polyurethane transmission mounts, tubular transmission crossmembers, engine-and-transmission mounting packages, Tri-Five conversion hardware, Mustang II-related mounting systems, and supporting hardware.
What is the difference between a transmission mount and a transmission crossmember?
The mount creates the connection between the transmission and its support while helping isolate movement and vibration. The crossmember spans the chassis beneath the transmission and provides the structure to which that mounting arrangement attaches.
Which GM transmissions have mounts available from POL?
Current GM mount listings cover combinations including TH350, TH400, 700R4, 4L60E, Powerglide, and Muncie four-speed applications. Compatibility varies by individual rubber or polyurethane mount, so check the specific transmission listing before ordering.
Does POL carry transmission crossmembers for Chevy C10 trucks?
Yes. A tubular transmission crossmember is listed for 1963-72 Chevy/GMC trucks, while a separate design covers 1973-87 applications. Earlier 1947-59 Chevy/GMC trucks also have their own tubular crossmember.
Are transmission mounting parts available for 1955-57 Chevy Belair models?
Yes. This is one of the largest vehicle-specific groups on the page. Options include Deluxe and Economy transmission crossmembers, a convertible-specific crossmember, complete engine-and-transmission mount kits, and a Turbo transmission side-mount conversion.
Do convertibles require different transmission mounting parts?
They can. POL specifically lists a 1955-57 Belair convertible transmission crossmember and a separate convertible Deluxe engine-and-transmission mount kit. Always check body-style fitment instead of assuming a coupe or sedan component fits the convertible.
How do I choose the correct transmission mount or crossmember?
Start with the exact vehicle, year, chassis, and body style. Then identify the engine and transmission combination and account for modifications such as Mustang II suspension. Finally, determine whether the installation needs a mount alone, a crossmember, conversion hardware, or a complete drivetrain mounting package.