Adapting
GM Gen III/IV LS Engines
to the
TR-4050 & Late NV4500 Transmissions

KIT-LS-TR4050-LNV4500

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Kit #KIT-LS-TR4050-LNV4500 joins GM Gen III/IV LS engines to the TR-4050 and Late NV4500 transmissions. It bundles the bellhousing, input bearing retainer, clutch assembly, flywheel, throwout bearing, pilot bushing and hydraulic clutch release components needed to complete the swap.

Kit Contents / Bill of Materials

Every component below is also sold separately — select any item to view its product page and buy only the parts you need.

• K-BH-4050 — Kit, Bellhousing, GM Gen I-IV Block to TR-4050 and Late NV4500 transmissions
• K-RET-4050 — Input bearing retainer turned to fit 5.125" big bore GM bellhousing and sleeve for throwout bearing
• 04-049 — GM/Chevy V8 Clutch Kit 11", 10 Spline x 1-1/8"
• HCRC-34 — GM Bellhousing Hydraulic Slave Cylinder Retrofit, 3/4" Bore (Small Block Chevy & LS style)
• TB1 — Novak Adjustable Throwout Bearing, GM Version
• LS400-35X — GM LS Gen III/IV Flywheel, 168T, Offset, 35 lb, for up to 12" Clutch (6 bolt)
• PB-6071357 — Pilot Bushing, GM Gen III (2001-) to Jeep T14/T15/T18 & AX15 (1992-1999) / NV355 / NV4500 / TR4050
• HCR9-K — Stainless Braided Clutch Line, 3AN Female Ends, With Fittings

Applications & Compatibility

Compatible Engines

This kit, as configured, is for GM Gen III/IV LS engines. Its flywheel (LS400-35X) and pilot bushing (PB-6071357) are both specific to the Gen III/IV crank and pilot tip.

The K-BH-4050 bellhousing itself bolts to the common GM Gen I-IV pattern, so small block Chevy (Gen I) and Gen II engines can use this same conversion — but they require a different flywheel and pilot bushing than the ones listed above. Contact us for the correct components for your engine generation.

Compatible Transmissions

This kit is designed for the TR-4050 and Late NV4500 transmissions, using the included pilot bushing to properly match the GM Gen III+ crank pilot tip to these transmissions' input shaft.

Related Products

Kit, Bellhousing, GM Gen I-IV Block to TR-4050 and Late NV4500 transmissions

The bellhousing for this conversion, bolting GM Gen I-IV blocks to the TR-4050 and Late NV4500 transmissions.

K-BH-4050

Input bearing retainer turned to fit 5.125" big bore GM bellhousing and sleeve for throwout bearing

Turned to fit the 5.125" big bore GM bellhousing, and sleeved for the throwout bearing.

K-RET-4050

GM/Chevy V8 Clutch Kit 11", 10 Spline x 1-1/8"

This kit is compatible with classic factory Small Block 168 tooth flywheels for many Chevy engines. It features a pressure plate with great holding power but civilized release pressure.

04-049

GM Bellhousing Hydraulic Slave Cylinder Retrofit, 3/4" Bore (Small Block Chevy & LS style)

Retrofits a hydraulic clutch release onto GM bellhousings, small block Chevy & LS style, 3/4" bore.

HCRC-34

Novak Adjustable Throwout Bearing, GM Version

This release bearing assembly uses a telescoping and locking design which spans the range of shortest to longest GM throwout bearings that were ever available.

TB1

GM LS Gen III/IV Flywheel, 168T, Offset, 35 lb, for up to 12" Clutch (6 bolt)

This flywheel standardizes LS engines so they can use standard off-the-shelf clutch kits like earlier Chevrolet engines.

LS400-35X

Pilot Bushing, GM Gen III (2001-) to Jeep T14/T15/T18 & AX15 (1992-1999) / NV355 / NV4500 / TR4050

This pilot bushing fits GM Gen III+ Vortec / LS cranks and matches the pilot tip of the TR-4050 and NV4500 transmissions.

PB-6071357

Stainless Braided Clutch Line, 3AN Female Ends, With Fittings

This durable hose will join your master cylinder to the hydraulic slave kit.

HCR9-K

Also See

• Adapting the NV4500 to Jeep Transfer Cases
• The Novak Guide to GM Gen III+ Engines
• Novak's #HCR Series Hydraulic Clutch Release Kits