THM 4L60 (700-R4) NO 4TH GEAR

COMPLAINT: No 4th gear; 2nd and 4th pressure lower than line pressure.

CAUSE: The cause could be the bleed orifice cup plug missing from the case in the bottom of the 3-4 accumulator bore (see Figure 1).

CORRECTION: Install bleed orifice cup plug, OEM Part Number 8628864. More Auto Equipment?

THM 440-T4 VALVE BODY GASKET IDENTIFIACTION
1985 and 1985 l/2 model valve body and channel plate gaskets "ARE NOT" interchangeable.
Ink stamped on each gasket is a 3 digit Identification Number, in the location shown in Figure 1.
Refer to the chart in Figure 2 for proper application. Refer to Figure 3 to identify transaxle model.
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THM 200-4R - NEW FILTER

Some 1981-87 vehicles equipped with THM 200-4R transmissions' may exhibit a gear noise (whine) prior to the 1-2 shift and possibly during 2nd gear. This condition may be caused by a wear pattern on the front planetary gears. This noise may be reduced by replacing worn gearset parts then checking and adjusting the foward clutch shaft end play and the output shaft end play to the specifications in this bulletin.

TRANSMISSION IDENTIFICATION INFORMATION (Figure 1) Note that the specifications given in this bulletin are at low end of the range printed in the service manual and only need to be used to correct a lst/2nd gear noise condition.

SERVICE ACTION
If worn, replace front internal gear, front carrier assembly and front sun gear. Check ans adjust end play to the following Specifications.

Forard Clutch Shaft: 0.9Omm--1.3Omm (0.035"--0.051")
Output Shaft: 0.32 mm--0.64mm (0.013"-- 0.025)

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