Skip to main content
Spring Cleaning Sale - Big Savings!
Motor Life Events Community Support
ASK OUR EXPERTS
1-866-464-6553
2
Images
White Box

White Box Transmission Crossmember

1970-1974 Dodge Challenger and Plymouth Barracuda Transmission Crossmember for Gen III Hemi Swap

Part # WB130038

White Box Transmission Crossmember

In Stock
Free Shipping on orders over $150*
Clearance
$28.03
was $31.14
save 9%
Add to Wishlist
Does it fit my vehicle?
3

Emissions

This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles.

See Emissions Details

Also Bought

White Box transmission crossmember is part of the most comprehensive line of GEN-3 Hemi Swap components available for the Mopar E-Body. This Crossmember allows the installation of the popular A727 3-speed, NAG1 5-Speed, 8HP70/8HP90 8-speed automatic transmissions, or Tremec TKX (GM style) manual transmission when used with the corresponding adapter plate (sold separately). No cutting or drilling is necessary; just bolt it in the factory location using the supplied hardware. The modular design allows the use of several different transmission options without the need to buy or fabricate a different Crossmember - simply change to a different adapter plate and the driveline and u-joint alignment have been preset to the corresponding transmission. WB130038 Crossmember is designed to use a popular and inexpensive GM style transmission mount for its compact design that allows for better ground clearance than the factory crossmember (Hooker part number 71223029HKR or 71223030HKR - sold separately). Solid 3/16" Steel construction and Raw Unpainted Finish for Great Value.

Features:

  • Accommodates Popular A727, NAG1 , 8HP70, 8HP90, or Tremec TKX (GM Style) Transmissions (Requires Transmission Specific Adapter Plate)
  • Uses the Factory Mounting Holes - for Easy Installation
  • High Tuck Design to Maximize Ground Clearance
  • Accommodates Up to 3” Exhaust
  • Uses GM Style Transmission Mount - Hooker Part# 71223029HKR or 71223030HKR (Sold Separately)
  • Modular Design with Bolt-on Transmission Adapter Allows Future Transmission Swaps w/o Replacing the Crossmember
  • Welded Steel Construction w/ Raw Unpainted Finish for Great Value
  • Heavy Duty 3/16” Steel Construction - for Strength & Durability
  • Includes Hardware & Instructions

About White Box

White Box offers budget-conscious solutions for engine swaps, exhaust systems, headers, fuel pumps, and even traction bars. Shop now at Holley.com!

Application1970-1974 Mopar E-Body
Brand White Box
Clearance CategoryEngine Swap Parts
ColorRaw
Discount Percentage5-25%
Emission Code3
6
FinishRaw
MaterialSteel
Motor TypeChrysler Gen III Hemi
Product TypeTransmission Crossmember
Transmission8HP70
8HP90
A727
NAG1
TKX Chevy
Type of ComponentTransmission Crossmember
UPC090127120132
Part NumberWB130038
3

This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles.


The following vehicles are considered Uncontrolled (Non-Emissions Controlled) Vehicles:

  • 1965 and older U.S. manufactured California Certified vehicles
  • 1967 and older U.S. manufactured Federally Certified vehicles
  • 1967 and older Foreign manufactured vehicle


WARNING: It is against the law to install this part on an Emissions Controlled Vehicle


The following vehicles are considered Emissions Controlled Vehicles:

  • 1966 and newer U.S. manufactured California Certified vehicles
  • 1968 and newer U.S. manufactured Federally Certified vehicles
  • 1968 and newer Foreign manufactured vehicle
Instructions for Part# WB130038
Use with Engine Mounts WB130037 and Polyurethane Transmission Mount 71223029HKR (Black), or 71223030HKR (Red) This Crossmember Requires Transmission Specific Adapter Plate (sold Separately) WB130039 A727 Transmission Adapter. WB130040 NAG1 Transmission Adapter - Pinch Weld at Firewall Will Need to be Rolled & WB130041 8HP70 Transmission Adapter - Pinch Weld at Firewall Will Need to be Rolled. WB130043 8HP90 Transmission Adapter - Pinch Weld at Firewall Will Need to be Rolled & Hammer work to gain tunnel space. WB130044 Tremec TXK (GM Style) Transmission Adapter - Requires Some Transmission Tunnel Cutting. Use with Drivers Side Mounted Starter on NAG1, 8HP70, and 8HP90 transmissions - to Avoid Clearance Issues with the Factory Steering System.

We Suggest

*Free Shipping & Handling only offered to the contiguous US on orders over $149, excludes clearance parts and oversized packages.

Some parts are not legal for use in California or other states with similar regulations.