Turbo Action 27255E/ES Turbo Hydro 200 Electronic Shift Valve Body (PRND21) User Manual

Page 2

Part # 27255ES

3/02,5/04,3/07,12/07,6/09

STEP #2:

Drain transmission by dropping pan at one end. Recommend leaving a couple of bolts at-
tached until most of the oil has drained (bolts 13mm).

STEP #3:

Remove transmission oil filter by removing two bolts (10mm socket). Also, these two bolts
are longer than other valve body bolts. (Fig. #2)

STEP #4:

Being very careful, remove bolt which holds throttle lever and bracket assembly. See Fig. #3.
You will no longer need the throttle lever and bracket assembly.

STEP #5:

Remove bolt holding manual detent roller and spring. See Fig. #4.

STEP #6:

Remove remaining six valve body bolts. Lower valve body carefully. Be careful to not drop
manual valve (Fig. #5). Also, there will be one (1) ball sitting on the plate (remove) and four
(4) balls sitting in the valve body. In addition, there will be a large spring sitting in the valve
body. (Fig. #6). Discard the one (1) ball sitting on the plate, the spring, #1, #2 and #4 balls.
See Fig. #8. Do Not discard #3 ball.

STEP #7:

Remove old spacer plate and gaskets. Be sure all gasket material is removed from the
transmission case.

STEP #8:

Tap governor hole 5/16-18 and install Set Screw (#24126). This hole must be deep enough so
that the Set Screw is below the surface of the case. Suggest Loctite on Set Screw. Fig. #12.

STEP #9:

Carefully remove shipping retaining nuts & washers holding the aluminum manifold. Be
very careful to not put pressure on the manifold causing it to break the epoxy loose!

Be sure #3 Ball is placed into new valve body. See Fig. #8.

STEP #10:

Place valve body gasket on valve body (V.B. marked on gasket #27097). See Fig. #7.Now
place valve body spacer plate on top of gasket.

STEP #11:

Place case gasket #27098 on top of valve body spacer plate. This is the gasket marked C.
Fig. #7.

SPECIAL NOTE: Use petroleum jelly to keep gaskets from moving around.

Maximum Performance and Durability Do Steps #12- #15, otherwise skip to Step #16.

STEP #12:

Remove front pump assembly and drum assemblies from transmission. NOTE: You should
use lock-up transmission parts for best results.

STEP #13:

Remove direct clutch drum lip seal. CAUTION: DO NOT remove any lip seals from the direct
clutch piston.

STEP #14:

Remove ball check that is located in the front pump assembly.

STEP #14A

Tap

Reverse Port

hole 3/8”-16 and install Set Screw (#23138). This hole must be deep enough

so that the Set Screw is flush or slightly below the surface of the case. Suggest Loctite on Set
Screw Fig.13.

STEP #15:

Reinstall all parts per General Motors specifications.

STEP #16:

Raise valve body up carefully into transmission being sure that manual valve lines up properly
with shift linkage. Fig. #5. NOTE: Do Not reinstall ball that set on plate or the big spring.
.

STEP #17:

Install all valve body bolts including special manifold bolts finger tight, except manual detent
roller spring bolt (Fig. #9).

Suggest using one special long bolt through manifold and one

filter bolt through filter hole to guide valve body into place. This will keep gaskets
lined up. Then install rest of bolts before tightening up any and be sure you keep
manual valve lined up.