I have an early LS engine with a long crank. What do I need to bolt-up my old GM automatic?

Application Details

• Engines
• • 1999-2000 Chevy LQ4, 6.0L engine (VIN Code U), originally mounted to a 4L80E transmission
  • 1999-2000 Chevy LR4, 4.8L engine (VIN Code V), originally mounted to a manual transmission
• Transmissions
• • Powerglide
  • TH350
  • TH400
  • 200R4
  • 700R4
  • 4L60

Solution

For the LQ4 engine, you can use the stock flexplate. The LR4 used a flywheel. So, you will need a new one.

• Use a stock replacement LQ4 flexplate WITHOUT the spacer.
• • One example is the Pioneer Automotive FRA452.

You will also need a new torque converter. The LQ4 flexplate uses an 11.500 in. torque converter bolt pattern.

1. Follow this link to see applicable Torque Converters.

   **Using the Filter Options.**

2. Choose your Transmission Type.
3. Choose your Torque Converter Usage.
4. Choose your desired Stall Rating.

Cause

All LS engines used the standard GM bellhousing bolt pattern. The dowel pins are in the right spot and 5 of 6 bolt holes will line up. Most GM transmissions will bolt on without an issue.

The problem with most LS engines is the short crankshaft. The torque converter pilot is too short to engage the back of the crank. The early LQ4 and LR4 used a longer crankshaft than other LS engines. This makes them compatible with the older transmissions, without spacers or extensions.