G Force Transmission Crossmember, Adapter Swap Kit, Mounts — G Force Performance Products
Skip to content
G Force Transmision Crossmembers for More Strength
GF Web Banner Mock-Up Transmissions
GF Web Banner More Performance

Get Better Performance from Your Conversion Swap Parts

G Force Performance is the leading source for a crossmember or other primary component for a transmission swap or conversion. We are your conversion component source for LS, LT, SBC, or Cummins conversion components.

We're proud to say that about 90% of our products are Made in the USA.

New Products

Shop collection

TECH TIPS

    Cummins Conversion Adapter Kits by G Force Performance
    Patent Pending Mock Up Block  by G FORCE PERFORMANCE
    G Force Billet Fox Body Crossmember on Stacey David's Gearz.avi
View More

We now have Partner Brands

Fine LInes Logo
Boss Hog Logo

Patent Pending Mock Up Swap block™

Made-in-usa-flag2.png__PID:a98f1e92-f6ea-4b9d-82b7-d6622091bb2e
G Force Performance Products More Precision Homepage section background

THE ORIGINAL LIGHTWEIGHT STEEL SWAP BLOCK

Engineered for car enthusiasts and professionals working on conversion and engine swap projects, our innovative lightweight steel swap blocks guarantee engine fitment precision. They're a game-changer when working on unweildy engine swaps. Motor mounts, oil pan, water pump, headers, and other accessories and bolt-ons are easily mocked-up.

Currently available for LS, LT, SBC, BBC, Ford Godzilla 7.3L, and Cummins 4BT or 6BT engines, these patent-pending engine block templates are precision-formed to create a very strong, rigid structure, which is perfect for achieving the alignment you need.

We've also added Swap Block Transmission Mock Ups for a 6L80E/6L90E or TR6060 transmission.

We're constantly adding Swap Blocks for different engines and transmissions. Follow us @GForcePerformance Products on Instagram, Facebook, and YouTube for the latest new product announcements.

Learn More
G Force Performance Products More Precision Homepage section background

THE ORIGINAL LIGHTWEIGHT STEEL SWAP BLOCK

Engineered for car enthusiasts and professionals working on conversion and engine swap projects, our innovative lightweight steel swap blocks guarantee engine fitment precision. They're a game-changer when working on unweildy engine swaps. Motor mounts, oil pan, water pump, headers, and other accessories and bolt-ons are easily mocked-up.

Currently available for LS, LT, SBC, BBC, Ford Godzilla 7.3L, and Cummins 4BT or 6BT engines, these patent-pending engine block templates are precision-formed to create a very strong, rigid structure, which is perfect for achieving the alignment you need.

We've also added Swap Block Transmission Mock Ups for a 6L80E/6L90E or TR6060 transmission.

We're constantly adding Swap Blocks for different engines and transmissions. Follow us @GForcePerformance Products on Instagram, Facebook, and YouTube for the latest new product announcements.

Learn More

Our Performance Products Make Easy Work of Your Swap

Z32 Transmission To LS | 5 Speed Transmission Adapter Kit

Z32/Z33 LS Adapter Kits Z32/Z33 LS Adapter Kits Learn More

Z32 300zx transmission adapter kit with adapter plate, flywheel, pilot bushing adapter, and bolt kit

Z32/Z33 LT Adapter Kits Z32/Z33 LT Adapter Kits Learn More

Collection

Cummins Swap Kits Cummins Swap Kits Learn More

1996-2004 Mustang to SBC Full Kit- Fourth Generation | GF-CML-PK-C mustang 350 chevy swap

Mustang SBC Kits Learn More

G Force Transmission Crossmember

When you opt for a G Force crossmember, we assure you a seamless bolt-to-frame fit comparable to your factory transmission crossmember. The patented double-hump profile accommodates large exhaust diameters, eliminating the need to alter the crossmember to accommodate them. No cutting or welding ensures a hassle-free installation. Additionally, each crossmember comes with easy-to-follow installation instructions and mounting hardware.

Learn More

USE OUR CD009 TRANSMISSION ADAPTER TO SAVE ON YOUR LS SWAP

If you're eager to experience the thrill of shifting through the gears in your LS swap but prefer not to break the bank with a T56 transmission, the G Force CD009 transmission adapter is the solution you've been searching for. The CD009 transmission offers seamless gear shifts while efficiently transferring power to the wheels. Plus, our adapter kit simplifies the installation process behind your LS engine!

Shop Now

Performance Engineered from Start to Finish

G Force Performance Products exclusively manufactures G Force transmission crossmembers, swap blocks, motor mounts, transmission mounts,  suspension components, and more. Our company focuses on crafting premium parts that help automotive enthusiasts achieve their objectives.

Our team of engineers remains committed to the pursuit of groundbreaking designs and upholding our reputation for delivering durable and reliable parts. We are dedicated to an exceptional customer experience from purchase to installation and beyond. We encourage you to consider G Force Performance Products' remarkable aftermarket parts.

Let customers speak for us

from 461 reviews
James Fox
GM Transmission Mount Spacer Block 1" Height | GF-SPR1-01
Tkx in a 39 ford coupe

Just what i needed for the TKX installation. AAAA ++++

Mitchell Hoihjelle
Cummins 6BT Bellhousing Adapter Bolt Kit | GF-BOLTKITADAPTER
Great BUT

I had scoured the Internet, looking for an adapter plate bolt kit, my adapter plate was a D stroke and they would not sell me the bolt kit so I had to search elsewhere. I found GeForce’s, everything worked perfectly matched up like it was supposed to except for the one Allen wrench bolt the head was a couple millimeters too big I had to grind it down to fit into the D stroked adapter plate, which is not GeForce’s fault at all. I am very thankful that they sent me just the bolts that I needed.

Eric Borsvold
Standard Height Polyurethane Transmission Mount | GMTM
Trans mount

Fit perfect with the new Gforce cross member

Ian
Ford Mustang Adjustable Transmission Mount | GF-FMATM
GF-FMATM - Saved the project

I was installing a Tremec on a Jaguar - factory mount was close to working, but not quite there. This mount was not as tall (which was another issue I had with factory fitment), so it fit much better with the correct driveshaft angle and location.

JAMES BEHM
1978-1983 Malibu, Monte Carlo, El Camino, Cutlass, Grand Prix, Regal Frame Extension | GF-FE100
G BODY CROSS MEMBER

GREAT FIT.

Keith Meracle
GM Transmission Mount Spacer-Block | GF-GMTM-SB2
Happy customer

Great customer service will definitely use this company again

Martin van Leeuwen
1989-2002 Cummins to Allison Adapter Kit | GF-A-S
Cummins to Allison adapter kit

Super communication, fast delivery, perfect fit!

Adam Coyes
LS To AR5 Transmission Adapter Kit | GF-LSAR5-KIT
AR5 adapter

Works as advertised. Fast shipping to Canada

Bruce
G8, SS, Camaro Polyurethane Transmission Mount | GF-CG8SSTM

Exactly what i needed

marc martinez
Short/ Low Profile Polyurethane Transmission Mount | GMTM-LP
Low profile transmission mount

This product was excellent and got my project going.

Hussain alali
1967-1972 C Series Truck Crossmember | RCC-10-2-PRO

1967-1972 C Series Truck Crossmember | RCC-10-2-PRO

Kyler Hirch
Swap Block® Mock Up Cummins 3.9 4BT Engine Block | GF-EJ-CUMMINS-4BT
Swap block

Super easy to put together. Pieces fit together tighter than I expected from bending tabs over. Makes fitting a swap so much easier and I am able to lift it in and out of an engine bay by hand instead of lifting a cast block with an engine hoist.

Marylou Marks
4L80E Low Stall, Triple Clutch, Billet Torque Converter | GF-80B31200

4L80E Low Stall, Triple Clutch, Billet Torque Converter | GF-80B31200

DUSTIN BALL
1964 -1967 & 1968-1972 A Body Hardtop Crossmember | RCAE-4

1964 -1967 & 1968-1972 A Body Hardtop Crossmember | RCAE-4

Walt E.
1979-2004 Mustang Subframe Connectors | SSM-1402-BLK
Worked Great....with a little extra work.

I purchased these for 2000 base model coupe that is being setup for more agressive street driving and potential autocross events. What sold me on these units was the direct tie in between the front and rear suspension points and bolt on installation. I did run into a clearance issue with my already installed Maximum Motorsports sport adjustable rear lower control arms that required some additional install time and effort. This was needed as the control arm sway bar mounting plate hit the rear of the crossmember under full suspension drop. A Dremel and some grinding bits took care of this clearence issue. I was also able to re-use the original M14 x100mm rear lower control arm bolts and lock nuts to mount the rear of the crossmembers. Last, Dave was a great help during this project as I came up on these issues and we discussed the best course of action. Many Thanks to Dave for his assistance!

Blogs

Articles and Information

Tech Tips

Faqs