S10/T10 P/U 2WD V6-262 4.3L (1988)
IMPORTANT:
Do not depress the detent button when checking rearward play.
Figure 3 - Detent Spring/Screw Replacement
3.
Replace the transfer case detent poppet spring (P/N 15547384) with P/N 15580210. Replace the transfer case detent spring retaining screw (P/N
3975717) with P/N 15580211. This will increase the detent spring load (Figure 3).
Parts are currently available from GMSPO.
NOTICE:
Both the detent poppet spring and detent poppet screw must be replaced together. Interchanging the old and new parts may cause shifting
problems (i.e. an inability to shift the transfer case).
Transfer case oil must be drained to perform the above part change. Refill with Dexron II upon completion.