TCI TH350 Low Gear Planetary Set 2.75 First, 1.52 Second - Part 327500

Upgrade the performance and launch characteristics of your GM TH350 automatic transmission with the TCI Low Gear Planetary Set, Part 327500. This planetary gear set provides a 2.75:1 first-gear ratio and a 1.52:1 second-gear ratio, helping deliver stronger off-the-line acceleration and improved gear spacing compared with the standard TH350 planetary configuration. It is a practical choice for street, strip, performance, and transmission rebuild applications where enhanced low-gear performance is desired.
Designed specifically for TH350 transmissions, the TCI 327500 planetary gear set supports a direct-fit installation when used with compatible transmission components. Its engineered gear arrangement helps optimize torque multiplication in first gear while maintaining a useful second-gear ratio for responsive acceleration through the shift. Always verify transmission compatibility, geartrain configuration, and application requirements before installation.
The TCI TH350 Low Gear Planetary Set is supplied as a complete kit for convenient transmission-building projects. It is well suited for builders and enthusiasts seeking a reliable upgrade from the original low-gear planetary set without changing the transmission case or overall transmission architecture. Proper assembly, lubrication, clearance checks, and professional installation are recommended to help ensure dependable operation and long service life.

Features:

• Brand: TCI

• Part Number: 327500

• Application: GM TH350 automatic transmissions

• First-Gear Ratio: 2.75:1

• Second-Gear Ratio: 1.52:1

• Product Type: Low gear planetary set

• Kit Contents: Complete planetary gear set kit

• Performance Benefit: Increased torque multiplication and improved low-gear acceleration

• Installation: Designed for compatible TH350 transmission rebuilds and upgrades