* 700R4: This is a four-speed automatic transmission that was used in GM vehicles from 1982 to 1993. It is also a popular choice for Chevy 4.3 swaps because it offers better fuel economy and performance than the TH350.
* 4L60E: This is a four-speed automatic transmission that was used in GM vehicles from 1993 to 2005. It is the most modern transmission on this list, and it offers the best fuel economy and performance. However, it is also the most expensive and difficult to install.
* NV3500: This is a five-speed manual transmission that was used in GM vehicles from 1988 to 2004. It is a popular choice for Chevy 4.3 swaps because it is known for its durability and reliability. However, it is also more difficult to find and install than the automatic transmissions on this list.