Suburban 3/4 Ton 4WD V8-305 5.0L (1986)
Accumulator: All Technical Service Bulletins
A/T - Accumulator Pistons & Seals Enhance Shift Points
Number:
86-148
Section:
7A
Date:
Sept. 1986
Subject:
NEW ACCUMULATOR PISTONS AND SEALS FOR ENHANCED SHIFT POINTS AND SHIFT SMOOTHNESS
Model and Year:
1982-1986 ALL MODELS WITH THM 700-R4 TRANSMISSIONS
TO:
ALL CHEVROLET DEALERS
FIGURE 1 - THM 700-R4 TRANSMISSION IDENTIFICATION INFORMATION
Beginning June 18, 1986, or Julian Date 169, (Refer to Figure 1) all 1986 THM 700-R4 transmissions are built using new 1-2 and 3-4 accumulator
pistons and seals to assist in maintaining consistent shift points and smoothness.
FIGURE 2 - NEW PART VS PREVIOUS PART
When servicing a 1982 through 1986 THM 700-R4 transmission, use the new pistons and seals (refer to Figure 2) which are available as service package
