Removing Cooler By-Pass Valve Seat; Removing Priming Valve And Spring; Removing Oil Pump Body Oil Seal - Pontiac Grand Prix Service Manual

TURBO HYDRA-MATIC TRANSMISSION M-38 7G-23
I
7. Remove pump cover-to-direct clutch drum selective
thrust washer.
NOTE: Washer has one ( I ) large iang and conirols end
play of transmission.
8. Lift pump cover and stator shaft assembly from
pump body.
9. Mark drive and driven gears for aid in re-assembly
and remove gears from pump body (Fig. 76-49).
10. Remove oil pump priming valve and spring from
pump body face. (Fig. 7G-50).
11. If necessary to replace cooler by-pass valve, remove
cooler by-pass valve seat, check ball and spring with
the aid of a bolt extractor (Fig. 7G-51).
12. If necessary to replace oil pump body oil seal, place
pump body on wood blocks so machined face surface
is not damaged and remove pump body-to-converter
hub lip oil seal with screwdriver or a small pry bar.
Discard seal (Fig. 76-52).
INSPECTION (Fig. 76-53)
1. Wash all parts in cleaning solvent, blow out all oil
passages and air dry.
2. Inspect pump drive and driven gears, gear pocket
and crescent for nicks, galling or damage.
3. Inspect pump body and pump cover faces for nicks
or scoring.
4. Inspect pump cover hub outer diameter for nicks or
burrs which might damage direct clutch drum bushing.
5. Check three (3) pump cover and hub lubrication
IMING VALVE
Fig.
7G-51
Removing Cooler By-Pass Valve Seat
,
holes to make certain they are not restricted.
6. Inspect pump body bushing for galling or scoring.
Check clearance between pump body bushing and
converter hub
-
maximum clearance is .005". If
bushing is damaged, pump body should be replaced.
7. With parts clean and dry, install pump gears
in
pump body and check pump body face-to-gear face
clearance. Should be .0008" minimum to .0035"
maximum.
8. Inspect pump body-to-converter hub lip oil seal. If it
was replaced as above, inspect converter hub for
nicks
or burrs which might have damaged pump lip oil
seal
or pump body bushing.
PUMP TO CONVERTER
Fig. 7G-50 Removing Priming Valve and Spring
Fig. 7G.52 Removing Oil Pump Body Oil Seal