A/T Oil - Leak Diagnosis
83olds3SUBJECT NUMBER: 83-T-5
TRANSMISSION OIL LEAK DIAGNOSIS 125C, 200C,
325-4L AND 200-4R TRANSMISSIONS
DATE: March 17, 1983
If a transmission oil leak is detected, it is very important that the location and type of leak are diagnosed properly..
The following procedure will help in diagnosing the type and location of the leak on the transmissions listed above.
DIAGNOSIS PROCEDURE:
The following procedure can be performed on car.
1. Clean all residual oil from the transmission, concentrating on the transmission oil pan to case mating areas (all models), T.V. cable connector (all models), transmission oil pan to sprocket cover interface area (325-4L model), final drive to case connection (325-4L model), valve body cover to transmission oil pan interface area (125C model) (C.R.C.'s electramotive cleanser, or equivalent is recommended).
2. Dust the entire transmission with a white powder. (e.g., leak tracing powder or foot powder spray).
3. After normal operating temperature (170~F) has been obtained, let the transmission stand for at least (30) thirty minutes.
4. Inspect the transmission for leakage by following red oil traces left in the powder. (If residual oil is left on the transmission oil pan or sprocket cover, it will necessitate the cleaning and dusting procedure to be repeated.)
5. Once the leak has been diagnosed as to location and type (wetness, moist, damp etc.) refer to the following repair procedure:
FIGURE 1:
Figure 2:
Figure 3:
FIGURE 4:
REPAIR PROCEDURE:
125C, 200C, 325-4L, 200-4R (Figures 1, 2, 3 & 4)
ITEM* PART NAME LEAK CAUSE CORRECTION
2 Transmission Oil Pan Low Bolt Torque Retorque & Recheck Bolts
Gasket Leak Remove & Replace Gasket
Broken R.T.V. Bead Remove Cover & Reseal
with R.T.V.
3 T.V. Cable Connector Cocked & Remove Connector &
Connector "C" Interfering with Mount Reinstall
Seal Damaged Remove & Replace Seal
Connector Cracked Remove & Replace Cable
Fill Tube "D" Seal Missing or Damaged Remove Fill Tube &
Replace Seal
Electrical Connector "E" O-Ring Missing or Remove Connector &
Damaged Replace Seal
Connector Missing or Remove & Replace
Damaged Connector
4 Manual Shaft Seal Assembly Damaged Remove & Replace Seal
5 Governor Cover O-Ring Damaged Remove & Replace O-Ring
Low Bolt Torque Retorque Bolts & Recheck
6 Speedo Fitting Low Bolt Torque Retorque Bolt & Recheck
*"Item" refer to number on Figures 1 thru 4
125C, 200C, 325-L4, 200-4R (Figures 1, 2, 3 & 4) cont.
ITEM* PART NAME LEAK CAUSE CORRECTION
Seal Damaged Remove & Replace Seal
7 Servo Cover O-Ring Damaged Remove & Replace O-Ring
8 Cooler Fittings Low Fitting Torque Retorque Fitting & Recheck
Cracked Fining Replace & Retorque Fitting
11 Converter Asm. Hub or Seam Weld Leak Remove & Replace Convener
12 Converter Seal Seal Damaged Remove & Replace Seal
13 Vent Leaking Check for the Following
& Correct as Necessary
A) Oil Overfill
B) Blocked Drainback Holes in Sprocket Support
C) Engine Coolant in Oil
*"Item" refer to number on Figures 1 thru 4
FIGURE 1:
325-4L ONLY (Figure No. 1)
1 Sprocket Cover R.T.V. Bead Broken Remove Cover & Reseal R.T.V.
Cracked Cover Replace Cover
Corner "A" Leak Past Design Case-Drill Thru &
Add Nut, Bolt & Lock Washer
Corner "B" Leak Remove Cover & Reseal R.T.V.
9 Case Face to Final Drive Low Bolt Torque Retorque Bolts & Recheck
10 Case Face to Final Plug Loose (Leaking) Remove Plug & Replace
Drive Governor Cover (Loctite Plug)
Plug High Drive Plug into Case Below
Face Surface
*"Item" refer to number on Figure No. 1
FIGURE 4:
125C ONLY (Figure No. 4)
16 Valve Body Cover to Low Bolt Torque Retorque Bolts &
Case Assembly Recheck
R.T.V. Bead Broken Remove Cover & Reseal
with R.T.V.
Gasket Leak Remove Gasket & Replace
17 Axle Shaft Seals Seals Damaged Remove Seals & Replace
*"Item" refer to number on Figure No. 4
Figure 2:
Figure 3:
200C & 200-4R ONLY (Figure 2 & 3)
14 Pump Assembly Pump Bolts Loose Retorque Bolts & Recheck
Pump O-Ring Cut Remove O-Ring &
or Damaged Replace
Pump Porosity Replace Pump
15 Rear Extension Seal Torn or Damaged Remove Seal & Replace
*"Item" refer to number on Figures 2 & 3