Lower Section

Remove bottom oil pan, oil filter, accumulator cover with 2-1 servo feed and return pipes. Remove modulator and modulator valve. Check modulator with known good modulator and Tester (36619). If necessary, replace modulator. Remove all retainers, gaskets, pipes, 2-1 manual servo assembly and accumulator piston assemblies from bores (DO NOT  interchange springs). See Fig 1.

Fig 1: Exploded View Of Lower Section

Courtesy of GENERAL MOTORS CORP.