Manuals+

91604000

LS V8 Flexplate Adapter Kit Instruction Manual

Model: 91604000 | Manufacturer Part Number: 12A1z13

Brand: Generic

1. Product Overview

The LS V8 Flexplate Adapter Kit is engineered to allow direct bolt-on fitment of previous generation automatic transmissions, such as TH350 and 700R4, to 6-bolt crankshaft 1997-2007 LS engines. This kit simplifies LS engine swaps by supporting non-LS 4L60 transmissions and other popular older 3-speed and 4-speed automatics without requiring modifications to the LS engine block or crankshaft.

Key Features:

  • Compatible with all 6-bolt crankshaft 1997-2007 LS engines.
  • Enables direct fitment of previous generation automatic transmissions.
  • No modifications required to LS engine block or crankshaft.
  • New LS flexplate features dual torque converter patterns of 10.75” and 11.10”.
  • Flexplate is gold zinc plated, 4mm thick, and carries a SFI 29.1 certification.
  • Torque converter adapter ring supports the converter hub.

Kit Components:

  • 1x Adapter Flexplate (SFI 29.1, Forged 1-piece ring gear, 168 tooth, works with stock LS starter motor)
  • 1x LS Crank Adapter (Overall Height: 1.04”, Inside Diameter: 1.47”, Diameter Small End: 1.70”, Diameter Big End: 2.00”)
  • 6x LS Flexplate Bolts (M11 x 1.5, Exclusive flat 12-point head design, 200,000 psi rating)
  • 1x Torque Converter Bolt Kit (Includes bolts and nuts for torque converter to flexplate, Under Head Length: 1.25”, Thread Pitch: 7/16”-20, Wrench Type: 12 Point)
LS V8 Flexplate Adapter Kit with all components

Figure 1: Complete LS V8 Flexplate Adapter Kit showing the flexplate, crank adapter, and all fasteners.

LS V8 Flexplate Adapter Kit with flexplate and adapter

Figure 2: The flexplate and crank adapter, designed to adapt a GM non-LS automatic transmission behind a Gen III LS engine.

Close-up of LS V8 Flexplate Adapter Kit components

Figure 3: Detailed view of the kit components, including the 168-tooth flexplate, torque converter adapter sleeve, flexplate bolts, and torque converter bolts.

2. Setup and Installation

This kit is designed for straightforward installation. No modifications are required to the LS engine block or crankshaft for proper fitment.

General Installation Considerations:

  • Ensure all mating surfaces are clean and free of debris before installation.
  • Use appropriate torque specifications for all fasteners as recommended by the engine and transmission manufacturers.
  • The included torque converter adapter ring supports the converter hub, ensuring proper alignment.
  • Verify correct engagement of the torque converter into the transmission pump before bolting the transmission to the engine.

3. Operating and Functionality

Once installed, the flexplate adapter kit provides the necessary connection between your LS engine and the chosen automatic transmission. The flexplate's dual torque converter patterns accommodate a wide range of converters, ensuring compatibility with various setups.

The SFI 29.1 certification indicates that the flexplate meets stringent safety standards for performance applications.

4. Maintenance

The LS V8 Flexplate Adapter Kit is designed for durability and requires minimal maintenance. However, periodic inspection during other transmission or engine work is recommended.

Inspection Points:

  • Check for any signs of cracks or deformation on the flexplate.
  • Inspect the teeth of the ring gear for excessive wear or damage.
  • Ensure all bolts remain properly torqued.
  • Verify the crank adapter is securely seated and shows no signs of wear.

5. Troubleshooting and Compatibility Notes

While this kit offers broad compatibility, certain engine configurations require specific attention:

  • 8-Bolt Crankshaft IV LS Engines: This kit is not compatible with 8-bolt crankshaft IV LS engines. It is designed for 6-bolt crankshaft LS engines.
  • Early LS 6.0L (1999-2000) with Extended Crankshaft Flange: This kit is not for use with early LS 6.0L engines (specifically 1999-2000 models) that feature an extended crankshaft flange. These engines typically require a flat flexplate.
  • 1999-2000 LQ4 6.0 LS Engines with 4L80E: This kit may not work with some 1999-2000 LQ4 6.0 LS engines, particularly those originally equipped with a 4L80E automatic transmission, as they often require a flat flexplate due to their
    Documents - 91604000 – 91604000
    [pdf] Guide Decleration of Conformity
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    SC28-6478-2 Program Product IBM DOS/VS COBOL :ompiler and Library F rogrammer s Guide Pr10gram Nu ... RINT-ROU I INE. P20-EOF. PERFORM OCR-CLOSE. 91601000 91602000 91603000 CLOSE PRIN IER. STOP RUN. 91604000 91605000 PRINT-ROUTINE. WRITE PRIN I-RECORD AFTER ADVANCING PRINT-CONTROL. 91607000 91609...
    score:14 filesize: 21.92 M page_count: 396 document date: 2012-06-04
    [pdf] Guide Decleration of Conformity
    SC28 6478 1 DOS VS COBOL Compiler and Library Programmers Guide Mar75 doc lagout org science 0 Computer Science History old hardware ibm 370 cobol
    SC28 -6478-1 Program Product SC2864781 Program Product IBM DOS/VS COBOL Compiler and Library Pro ... T-ROUTINE. WRITE PRINT-RECORD AFTER ADVANCING PRINT-CONTROL. OCR-COPIED-PROCEDURES. COPY ILBLOCRP. 91604000 91605000 91607000 91609000 91610000 Figure 69. Sample OCR Program Part 3 of 5 Appendix ...
    score:14 filesize: 22.94 M page_count: 398 document date: 2012-05-25
    [pdf] Guide Decleration of Conformity
    SC28 6478 3 DOS VS COBOL Compiler and Library Programmers Guide Feb79 doc lagout org science 0 Computer Science History old hardware ibm 370 cobol
    SC28-6478-3 Program Product IBM DOS/VS COBOL Compiler and Library Programmer s Guide Program Numbe ... PERFORM PRINT-ROUTINE. 91001000 P20-EOL 91602000 PERFORM OCR-CLOSE. 91603000 CLOSE PRINTER. 91604000 STOP RUN. 91605000 PRINT-ROUTINE. 91607000 WRITE PRINT-RECORe AFTER ADVANCING PRINT-CO...
    score:14 filesize: 22.18 M page_count: 404 document date: 2012-05-25
    [pdf] Guide Decleration of Conformity
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    score:14 filesize: 21.65 M page_count: 422 document date: 2012-05-25