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Gen III GM LS V8 to TH350/700R4 Transmission Adapter Kit
Gen III GM LS V8 to TH350/700R4 Transmission Adapter Kit

Gen III GM LS V8 to TH350/700R4 Transmission Adapter Kit

Chevy LS V8, 2004R, 4L60E, 700R4, Powerglide, TH350, TH400, 29.1 SFI Rating

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Gen III GM LS V8 to TH350/700R4 Transmission Adapter Kit
Gen III GM LS V8 to TH350/700R4 Transmission Adapter Kit
Gen III GM LS V8 to TH350/700R4 Transmission Adapter Kit
Gen III GM LS V8 to TH350/700R4 Transmission Adapter Kit
Gen III GM LS V8 to TH350/700R4 Transmission Adapter Kit
Gen III GM LS V8 to TH350/700R4 Transmission Adapter Kit
Gen III GM LS V8 to TH350/700R4 Transmission Adapter Kit
Gen III GM LS V8 to TH350/700R4 Transmission Adapter Kit
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Gen III GM LS V8 to TH350/700R4 Transmission Adapter Kit
Gen III GM LS V8 to TH350/700R4 Transmission Adapter Kit
Gen III GM LS V8 to TH350/700R4 Transmission Adapter Kit
Gen III GM LS V8 to TH350/700R4 Transmission Adapter Kit
Gen III GM LS V8 to TH350/700R4 Transmission Adapter Kit
Gen III GM LS V8 to TH350/700R4 Transmission Adapter Kit
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Part # 91604000
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  • This kit includes the parts required to bolt a GM TH350, TH400, 700R4, 200-4R, or Powerglide transmission behind a Gen III LS engine
  • Includes flex plate, torque converter adapter sleeve, flex plate bolts, and torque converter bolts
  • Works with 10.75" and 11.066" (11.1") torque converter bolt patterns
  • Works with factory LS starter to reduce conversion costs
  • Flexplate is .035" thicker than stock which meets SFI 29.1 certification

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SFI Rating:
29.1
Sold in Quantity:
Kit

Info

Make your Gen III LS swap a breeze with this complete adapter kit for early GM automatic transmissions. These flexplate adapters are engineered to handle extreme duty applications and designed to take the punishment of today's high horsepower Gen III engines. The 4mm thick centerplate provides a solid foundation (that's 0.035" thicker than stock). Ring gears are precision welded to meet SFI 29.1 specifications, utilizing robotic cold-welding processes. These flex plates are inspected throughout the manufacturing cycle to ensure a high quality, safe end product.

For 1997-07 GM LS1/LS6 engines (up to '09 for LS2) and 4.8/5.3/6.0 truck engines including L33, L59, LM4, LM7, LQ4, LQ9, and LR4. Adapts all of these engines to TH350, 700R-4, 200-4R, 4L60 and Powerglide transmissions that originally came behind a non-LS engine (such as a SBC or BBC V8).

Kit Includes:

  • (1) Trans Adapter Flexplate
    • GM LS Gen II to early GM 3/4 speed automatic
    • Works with 10.75" & 11.066" (11.1") bolt-pattern torque converters
    • SFI 29.1 certified
    • Forged 1-piece steel ring gears
    • 168 tooth
    • Works with stock LS starter motor
  • (6) Gen III LS Flexplate Bolts
    • Fits Chevrolet Gen III/LS Series¬†V8
    • Exclusive, flat, 12-point head design
    • Has a 200,000 psi rating
    • M11 x 1.5
  • (1) LS Crank Sleeve Adapter
    • Overall Height: 1.04"
    • Inside Diameter: 1.47"
    • Diameter Small End: 1.70"
    • Diameter Big End: 2.00"
    • Material Type: Steel
  • (1) Torque Converter Bolt Kit
    • Under Head Length: 1.25"
    • Thread Pitch: 7/16"-20
    • Wrench Type: 12 Point

Notes

  1. May not work with some 1999-2000 LQ4 6.0 LS engines, specifically ones that came with a 4L80E automatic as they require a flat flexplate due to the "tall" crank flange.

Important Messages:

  • Get FREE shipping when your order includes this item and exceeds $99! Ground shipping only in the contiguous US.
Some parts are not legal for use in California or other states with similar laws/regulations

What's In The Kit

Each kit from Speedway Motors is carefully packaged and delivered right to your door. Below is a list of all the items you should expect to receive when you order this kit. Some of these items may also be available for sale individually if you're here looking for replacement parts.
  • ARP 244-2901 Chevy Gen III/LS Flexplate Bolts
    Qty x 1
  • LS Crankshaft TH350/TH400/700R4 Torque Converter Adapter Sleeve
    Qty x 1
  • LS1/LS2/LS6/5.3/6.0 to TH350/700R4/4L60 Adapter Flexplate
    Qty x 1
  • ARP 230-7303 GM Torque Converter Bolt Kit for Powerglide/TH350/TH400
    Qty x 1

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