Late (~’97 and newer) 4L60E

Adapting the Late (~97 and newer) 4L60E

The late 4L60E has a removable bellhousing and a six bolt tailhousing (different than TH400 six bolt tail).

How to use with 203/205 doubler

Drill/tap six bolt transfer case pattern into face of NP203, plug up stock holes and make a tab to hold down the idler shaft. An electric vehicle speed sensor needs to be added to the system, we can help with that.

Install shorter output shaft in 4L60E or use a spacer (we stock both), a 6 bolt to 4 bolt adapter, and then use a factory TH350/NP203 adapter. An electric vehicle speed sensor needs to be added to the system, we can help with that

How to use with Magnum underdrive system

Magnum box bolts up as is, no changes. An electric vehicle speed sensor needs to be added to the system, we can help with that.

How to use with NP205 alone

Install shorter output shaft in 4L60E, a 6 bolt to 4 bolt adapter, then use a factory TH350/NP205 adapter and drive sleeve. An electric vehicle speed sensor needs to be added to the system, we can help with that.