Frequently bought together
Description
A transmission crossmember for 1963–1987 Chevy and GMC trucks, laser cut from 3/16" mild steel. It carries a TH350, TH400, 700R4 or 4L60E and leaves room to run up to 4" exhaust underneath while keeping a high-clearance profile above the bottom of the frame.
Features
- Works with TH350, TH400, 700R4 and 4L60E transmissions.
- Laser cut from 3/16" thick mild steel.
- Transmission mount height is 5" from the top of the crossmember to the trans mount.
- Room for up to a 4" exhaust pipe underneath.
- Uncoated, ready for paint, powder coat or another finish.
- Mounting hardware included.
Choose your option
- Add the black polyurethane mount
- No mounts
Fitment notes
This crossmember requires an Energy Suspension mount #3.1108G, which can be added from the dropdown. It is designed around 1963–1987 GM truck frames and may fit other applications — check the measurements against your own setup before ordering for a swap or a custom chassis.
Truck compatibility and specs
Fits these trucks
1963–1987
Not sure this is the right part for your truck? Send us your year, make and model and we will confirm the fit before you order.
Specifications
- Part number
- 6387CM
- Material
- Raw Steel
- Brand
- LS Fabrication
- Interior / Exterior
- Exterior
- Weight
- 4.2 kg
Installation
Mounting hardware comes with the crossmember.
You also need an Energy Suspension #3.1108G transmission mount, which can be added from the dropdown on this listing.
Reviews
3 reviews for Transmission Crossmember – 63-87 GMC Chevy Truck
Common questions
How do I know it fits my truck?
This part is listed for 1963–1987 Chevy and GMC Blazer, C10, C20, C30, Jimmy, K10 and others. The full year, make and model list is in the Truck Compatibility tab on this page. If your truck has been modified, or you are between two of the year ranges we list, send us the year, make and model and we will confirm the fit before you order rather than after.
How long before it ships?
It is a stock item and generally ships within 1-3 business days. Carrier transit time is on top of that, and larger orders can arrive in more than one box on different days.
What if it is not right for the truck?
You have 30 days from delivery to request a return. The part needs to come back new, uninstalled and in its original packaging - once a part has been trimmed or welded it cannot go back. Return shipping is at your cost, and we ask that returns come by Canada Post. Made-to-order, sale and clearance items are final sale. The full terms are on our returns page.
Can I install this myself?
It is designed for an at-home install. Read the fitment notes and the Installation tab on this page before you start for anything that needs drilling, trimming or welding, and where an installation guide or video exists for the part it is linked there.
Still not sure? Contact us before you order.
Kris Hauser –
Thanks so much for the support and review!
Anthony (verified owner) –
Looks like quality craftsmanship, looking forward to installing it soon.
Appreciate the service!
Mike Ackley (verified owner) –
Nice crossmember fit like Kris said great company will buy from LS fabrication again