How to Install a LS to TH350 Transmission Adapter Kit

Adapting an LS engine to an older TH350/700R4 transmission. You can do this at home, and we offer a kit that makes this installation simple.

One thing you will encounter is that an LS crankshaft is usually about .0004 shorter. To accommodate that with an automatic transmission, we offer a dished flex plate to bolt onto the back of the crankshaft. This allows you to bolt on your torque converter to keep everything where it needs to be.

Parts from this episode:
Gen III GM LS V8 to TH350/700R4 Transmission Adapter Kit https://www.speedwaymotors.com/Gen-II...

0:16 LS Swap Transmission Options
0:34 LS Swap Flexplate
1:11 LS Swap Torque Converter Spacer
1:31 LS Swap Transmission Adapter

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