1967 - 1969 Firebird Overdrive 4L80, 4L80e, 4L85, and 4L85e G-Force Transmission Crossmember

New super heavy duty crossmember for your overdrive transmission. Works great for all 4L80, 4L80e, 4L85, and 4L85e transmissions. Finished in a durable Black Powder Coat. Includes new high-strength, Grade #8 mounting hardware. The best quality O/D crossmember we've found available. Transmission Mount is available separately, and we recommend a Polyurethane Transmission Mount, such as our Polyurethane part # TRA-724.

TRA-807 Installation Notes:

This crossmember is installed with the G Force label facing the rear of the vehicle. A second determining feature is crossmember center tube has a 1/2″ drain slot located on the bottom and on the passenger side next to the hump weldment.

The crossmember is installed so that the exhaust clearance humps are closed on the top and open on the bottom.

To utilize the provided 7/16 hardware it is necessary to enlarge the holes in the frame rails. If the installer chooses to utilize the stock size 3/8 hardware, it is strongly recommended that the installer obtains Grade 8 fasteners and washers to compensate.

Fits all 67, 68, and 69 models with a 4L80, 4L80e, 4L85, and 4L85e transmissions.

PART NUMBER: TRA-807

1967-1969 ( NOTE: DISTANCE BETWEEN CROSSMEMBER FRAME HOLES IS APPROXIMATELY 30-3/8”. MEASURE YOUR FRAME OR CROSSMEMBER TO INSURE PROPER SELECTION).

THIS CROSSMEMBER IS INSTALLED WITH THE G FORCE LABEL FACING THE REAR OF THE VEHICLE.

A SECOND DETERMINING FEATURE IS CROSSMEMBER CENTER TUBE HAS A 1/2" DRAIN SLOT LOCATED ON THE BOTTOM AND ON THE PASSENGER SIDE NEXT TO THE HUMP WELDMENT.

THE CROSSMEMBER IS INSTALLED SO THAT THE EXHAUST CLEARANCE HUMPS ARE CLOSED ON THE TOP AND OPEN ON THE BOTTOM.

TO UTILIZE THE PROVIDED 7/16 HARDWARE IT IS NECESSARY TO ENLARGE THE HOLES IN THE FRAME RAILS. IF THE INSTALLER CHOOSES TO UTILZE THE STOCK SIZE 3/8 HARDWARE, IT IS STRONGLY RECOMMENDED THAT THE INSTALLER OBTAINS GRADE 8 FASTENERS AND WASHERS TO COMPENSATE.