1970 - 1974 Firebird Overdrive Transmission Crossmember, 4L80E

New super heavy duty crossmember for your 70 - 74 Firebird overdrive transmission. Works great for all 4L80E transmissions. Finished in a black powder coat. Includes mounting hardware. The best quality O/D crossmember we've found available.

PART NUMBER: TRA-813

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.