A/T - Oil Leak Diagnosis: Overview
Model Year 1983Bulletin No. 83-77
File In Group 70
Number 8
Date Mar., 83
SUBJECT: DIAGNOSING TRANSMISSION OIL LEAKS ON 125C, 200C, 325-4L, AND 200-4R
When any THM transmission oil leak is detected, it is very important that they are diagnosed properly, as to the location and type of leak.
The following procedure will help in diagnosing the type and location of the leak and will suggest a correction method.
DIAGNOSIS PROCEDURE: (All Models)
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), and valve body cover to transmission oil pan interface area (125C model) (C.R.C.'s electramotive cleaner, or equivalent is recommend).
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: