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For LS LT Swap Crankshaft Flexplate Adapter Spacer Torque Stall Converter Hub Adapter Transmission Crank Sleeve compatible with LS1 LT1 TH400 TH350 700R4 Flywheel LS2 LS3 LQ4 LS7 5.7 6.0 5.3

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$9.99

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  • [Flexplate Adapter Spacer] When installing a Th350 or Th400 behind a LS engine while using a curved flywheel you'll need this flexplate adapter spacer.
  • [Application] Adapts TH350, TH400, Powerglide, 2004R, 700R4, 4L80E, 4L60, 4L60E (from non LS engine) torque converter snout to 1998-2004 LS/LT based engine.
  • [High quality] Flexplate spacer is crafted from high-quality iron and coated with a silver-plated surface, our flexplate spacer exhibits exceptional strength, corrosion resistance, and durability.
  • [Function] The spacer is designed to align the nose of the torque converter to the curved flexplate. It's inserted into the rear of the crankshaft.
  • [Installation] Insert the adapter into the center hole of the flexible plate and use a rubber or plastic hammer to evenly tap it into place until it is flush with the crankshaft.


Product Description

For LS LT LS1 Swap Crankshaft Flexplate Adapter compatible with TH400 TH350 700R4 2004R 700R4 4L80E
Made of hardened high-quality iron with silver-plated surface.
Compatible with All LS LT series engines Gen Ⅲ Ⅳ Ⅴ, including LS1 LT1 LS2 LS3 LS6 LQ4 LS7 Engines

Engine with Crankshaft flexplate

Compatible with All LS/LT series engines Gen Ⅲ Ⅳ Ⅴ 1998-2004, including LS1 LT1 LS2 LS3 LS6 LQ4 LS7 Engines.

(It is not required for 1999-2000 6.0L engine model.)

Transmission: Compatible with Powerglide, TH-400, 4L80E, TH-350, 2004R, 700R4, 4L60, 4L60E

Transmission with Torque Converter

Compatible with Powerglide, TH350, TH400, 2004R, 700R4, 4L60, 4L60E, 4L80E.

Adapts TH350 TH400 2004R 700R4 4L80E 4L60E torque converter snout to 1998-2004 LS/LT based engine.

Crankshaft Hub adapter for Torque Converter

  • Installation: Insert the adapter into the center hole of the flex plate and tap it into place until it is flush with the crankshaft.
  • In addition, due to different bolt styles, it is necessary to use a flexible plate or re-drill your flexible plate to obtain the correct torque converter style

Kimberly Roth
2025-07-08 10:13:52
I was skeptical because there hadn't been any reviews on this ls swap spacer. I have a gen 3 5.3 that I was mating to a th350 w/2500 converter. The piece fit perfect on the motor side and torque converter!!
Erin Garland
2024-11-17 15:37:21
If you're looking to mate a TH400 to a 5.3 this is an essential part. Too much slop in this part can cause alot of issues with your transmission pump. This part has way too much to work on both ends. Do yourself a favor and spend the extra little bit on a name brand. unless you just like pulling your wallet and engine out to change parts.