Transmission Mount Adapters for LS Swaps

Transmission mount adapters for LS and LT swaps that use a late model GM gearbox. Each adapter bolts to the tail of the transmission and gives it a traditional transmission mount pad. There are two for TR-6060 manuals and two for 6L90E, 8L90E and 10L90E automatics.

TR-6060, 6L90E, 8L90E and 10L90E
Automatics made for BRP crossmembers
Hardware included on the manual adapters

Planning the gearbox for your chassis? The chassis install guides list tunnel clearance by transmission. Building the whole swap? Add the adapter in the LS swap kit builder.

$39.95 Cadillac CTS-V 6L90E Transmission Mount Adapter

$39.99 Cadillac CTS-V T-56 / standard TR-6060 Trans Mount Adapter

$39.99 MG9 high-torque TR-6060 Trans Mount Adapter

Transmission mount adapter parts

Manual: TR-6060

One adapter for the Cadillac CTS-V T-56 and standard Camaro TR-6060, and one for the MG9 high-torque TR-6060 that sits behind the LSA in the CTS-V.

Automatic: 6L90E, 8L90E, 10L90E

One adapter for the 2009-2014 CTS-V 6L90E tailshaft housing, and one that covers both 8L90E and 10L90E tailshaft housings.

TR-6060 manual transmission adapters

Automatic transmission adapters

Which adapter fits my transmission?

Cadillac CTS-V T-56 or a standard Camaro TR-6060: the CTS-V T-56 / standard TR-6060 adapter.
MG9 high-torque TR-6060 from a CTS-V with the LSA engine: the MG9 adapter. It is a separate part from the standard TR-6060 adapter.
2009-2014 CTS-V 6L90E automatic: the CTS-V 6L90E adapter.
8L90E or 10L90E automatic: the 8L90E adapter fits both tailshaft housings.

What comes with each adapter

CTS-V T-56 / standard TR-6060 adapter: laser cut, CNC bent and jig welded from 3/16 inch steel, powder coated black, with hardware.
MG9 high-torque TR-6060 adapter: includes hardware.
Both automatic adapters are made to be used with BRP transmission crossmembers.

Transmission tunnel notes from the guides

1964-1967 A-Body, 1968-1972 A-Body, 1973-1977 A-Body and 1970-1972 Monte Carlo: the tunnel needs modifying for a T56, TR6060, 6L80E, 6L90E or 8L90E.
1958-1964 B-Body: tunnel work is required with a T-56, TR-6060, 6L80 or 6L90.
1970-1981 F-Body: the T-56, TR6060, 6L80E and 6L90E need some tunnel work.
1971-1976, 1977-1990 and 1991-1996 B-Body: the 6L80E and 6L90E need tunnel work at the tail shaft housing area.
1965-1970 B-Body: a 6L90E, 8L90E or 6 speed manual moves the crossmember rearward, so add the extra brackets that come in the kit.
1963-1972 GM truck: the 6L90E, 8L90E and 6 speed manuals fit the factory tunnel without floor changes.
1978-1988 G-Body: automatics need no tunnel work, but a T-56 needs a new shifter hole.
Sure-Fit crossmembers for the 1958-1964 B-Body, 1967-1969 F-Body and 1968-1974 X-Body fit every transmission BRP has tested, including the 6L90E, T-56 and TR-6060.

Adapter details come from the product listings. Tunnel notes come from the BRP chassis install guides.

Transmission mount adapter FAQ

What does a transmission mount adapter do?

It gives a late model GM transmission a traditional mount pad at the tailshaft, so it can use a traditional transmission mount. The two automatic adapters are made to be used with BRP transmission crossmembers.

Is the MG9 TR-6060 adapter the same as the standard one?

No. The MG9 is the high-torque TR-6060 used behind the LSA engine in the CTS-V, and it has its own adapter. The other manual adapter is for the CTS-V T-56 and the standard Camaro TR-6060.

Do you have an adapter for the 10L90E?

Yes. The 8L90E Transmission Mount Adapter adapts both 8L90E and 10L90E automatic tailshaft housings to a traditional transmission mount.

Will my transmission tunnel need work?

It depends on the chassis and the gearbox. The A-Body guides, for example, require tunnel work with a TR6060, 6L90E or 8L90E, while the 1963-1972 truck guide says those fit the factory tunnel. Check the guide for your vehicle.