Bert LMZ Transmission Kit for 1 Piece Rear Main Seal

The Bert LMZ Transmission Kit for 1-Piece Rear Main Seal is a complete 2-speed racing transmission package designed specifically for 1986 and newer Chevrolet Small Block V8 engines equipped with a 1-piece rear main seal. Built around the proven Bert LMZ aluminum racing transmission, this kit is engineered to provide maximum horsepower transfer, lightning-fast shifting, and exceptional durability for dirt and asphalt circle track competition.

The Bert LMZ features an internal hydraulic clutch assembly that reduces rotating weight while upgraded dog-tooth gears provide faster, more precise shifts. With a direct-drive high gear, 600 lb-ft torque capacity, and a compact design that is approximately 2-5/8 inches shorter than a Muncie transmission, this package is an excellent choice for IMCA, WISSOTA, Modified, Late Model, Hobby Stock, and Street Stock racing applications.

Features

• Genuine Bert LMZ 2-Speed Racing Transmission Kit
• Designed for Chevy Small Block V8 engines with a 1-piece rear main seal
• Internal hydraulic clutch assembly
• Lightweight aluminum transmission case
• Upgraded dog-tooth gears for quick, positive shifts
• Two forward gears with reverse
• Direct-drive high gear for maximum power transfer
• Approximately 2-5/8 inches shorter than a Muncie transmission
• Low rotating mass for improved acceleration
• Heavy-duty bearings and precision-machined components
• Compatible with standard two-lever racing shifters
• Built for dirt and asphalt circle track racing
• Excellent durability for high-performance competition

Gear Ratios

• Low Gear: 2.40:1
• High Gear: 1.00:1 (Direct Drive)
• Reverse: Included
• Neutral: Yes

Specifications

• Brand: Bert Transmission
• Model: LMZ
• Transmission Type: 2-Speed Manual Racing Transmission
• Application: Chevy Small Block V8 (1-Piece Rear Main Seal)
• Torque Capacity: 600 lb-ft
• Case Material: Aluminum
• Approximate Weight: 40 lbs
• Input Shaft Diameter: 1.0625 inches
• Input Shaft Spline Count: 10
• Output Shaft Diameter: 1.375 inches
• Output Shaft Spline Count: 27
• Output Style: Slip Yoke
• Hydraulic Clutch: Internal
• Bellhousing Included: Yes
• Shifter Included: No
• Yoke Included: No

Kit Includes

• Bert LMZ Aluminum 2-Speed Racing Transmission
• Steel Bellhousing for 1-Piece Rear Main Seal Applications
• Steel Drive Flange
• Braided Hydraulic Clutch Line
• AN Hydraulic Adapter Fittings
• Bellhousing Bolt Kit
• Racing Transmission Fluid
• Installation Hardware
• Manufacturer Documentation

Recommended Applications

Ideal for:

• IMCA Modified
• WISSOTA Modified
• Dirt Late Model
• Hobby Stock
• Street Stock
• Crate Engine Racing
• Asphalt Modified
• Circle Track Racing
• Open Wheel Modified
• Custom Competition Chassis

Compatible with 1986 and newer Chevrolet Small Block V8 engines equipped with a 1-piece rear main seal.

Installation Requirements

Installation may require:

• Standard two-lever racing shifter
• Slip-yoke driveshaft
• Racing transmission mount
• Crossmember
• Hydraulic clutch pedal assembly
• Racing transmission fluid
• Professional drivetrain alignment

Professional installation is recommended to ensure optimum performance, reliability, and proper drivetrain operation.

Warranty

The Bert LMZ Transmission Kit for 1-Piece Rear Main Seal is backed by a 1-Year Limited Warranty, covering defects in materials and workmanship under normal racing use and proper installation.

Why Choose the Bert LMZ Transmission Kit?

The Bert LMZ Transmission Kit for 1-Piece Rear Main Seal is built for racers who demand lightweight construction, dependable performance, and maximum power delivery. Its 600 lb-ft torque capacity, internal hydraulic clutch, dog-tooth gear design, and compact aluminum construction reduce drivetrain losses while delivering fast, consistent shifts. Complete with a precision-fit steel bellhousing, drive flange, hydraulic components, and installation hardware, this kit provides a race-ready solution for serious circle track competitors.