Transgo TH700-R4/4L60E/200-4R Hi-Rev Pump Ring Kits ’82-Up 700 PKH

Hi-Rev Pump Ring Kit for GM TH200-4R, TH700-R4, and 4L60E automatic transmissions with compatible 1982-up front pump configurations.

This transmission pump rebuild kit is designed for high-RPM and performance applications. It includes two hardened steel pump rings and a high-rev slide return or priming spring for front-pump service.

Part Details

• Part Type: Hi-Rev front pump ring kit

• Transmission Compatibility: GM TH200-4R, TH700-R4, 4L60E

• Application Range: TH200-4R 1980-1990; compatible 1982-up TH700-R4/4L60E pump applications

• Intended Use: High-RPM, performance, and severe-service transmission rebuilds

• Kit Contents: Two hardened pump rings and one high-rev slide return or priming spring

• Reference Number: 700-PKH

Why Replace Pump Rings

Factory-style cast or compressed-metal pump rings may become brittle, wear, distort, or break during high-mileage or high-RPM operation. Damaged pump rings can contribute to internal pump issues and pressure-related shift concerns.

This Hi-Rev kit uses hardened, precision-ground steel pump rings designed to provide a stronger alternative for compatible GM overdrive transmission pump assemblies. The included high-rev spring is intended to support pump priming and help reduce the high-RPM pressure drop that may contribute to soft maximum-throttle shifts.

Symptoms To Diagnose

A pump-ring upgrade may be appropriate during a transmission rebuild when inspection reveals ring wear, broken rings, pump damage, or related concerns. Symptoms that may warrant complete diagnosis include:

• Soft maximum-throttle upshifts at higher engine speed

• High-RPM pressure loss

• Low or inconsistent hot-idle pressure

• Pressure-regulator buzz or moan, especially when hot

• Damaged rings or pump components found during teardown

These symptoms can have multiple causes. Inspect the pump, stator support, converter, valve body, pressure regulator, seals, and related internal components before assuming the pump rings are the only repair required.

Fitment Verification

Fits compatible GM TH200-4R transmissions from 1980-1990 and TH700-R4/4L60E applications with the applicable 1982-up front pump design. Verify the transmission identification, original pump configuration, and component dimensions before purchase. Do not rely on vehicle year alone for fitment.

Fluid Service Guidance

Refill with the fluid specified for the transmission being serviced. Lubegard ATF Protectant may be used as part of a compatible fluid-service plan according to its product directions; it is not a substitute for correcting worn, damaged, or improperly assembled transmission