TV Linkage - Revised Adjustment Procedure
83ford8Article No. 83-20-11
TRANSMISSION - AUTOMATIC - AOD - REVISED THROTTLE VALVE (TV) LINKAGE ADJUSTMENT PROCEDURE USING TV CONTROL PRESSURE
FORD 1980-84 FORD, T-BIRD, LTD
LINCOLN-MERCURY 1980-84 MERCURY, LINCOLN, MARK, COUGAR, MARQUIS, CONTINENTAL
LIGHT TRUCKS 1981-84 E SERIES AND F SERIES EQUIPPED WITH 5.0L ENGINE
This revised method of setting TV linkage on all AOD transmissions is the only way to adjust the linkage to the middle of the specification curve. This method sets the linkage to the most sensitive point.
The new procedure attached uses a TV control pressure gage block service tool D84P-70332-A. If that tool is not available, alternates are listed in the procedure. Highlights of the new procedure include setting the TV linkage at idle with the gage block installed to 35 +/- 5 Psi.
The "TV pressure method for adjusting the TV linkage" procedure is recommended for transmission shift concerns while the "Linkage Adjusted at the Carburetor" procedure is recommended when the idle speed is changed by 50 RPM.
LINKAGE ADJUSTMENT USING TV CONTROL PRESSURE TV ROD SYSTEMS ONLY
The following procedure may be used to check and/or adjust the throttle valve (TV) rod linkage using the TV control pressure.
1. Check/adjust the engine curb idle speed to specification required.
2. Attach a 0-100 PSI pressure gage, T73L-6600-A, with the adapter fitting D80L-77001-A, or equivalent to the TV port on the transmission with sufficient flexible hose to make gage accessible while operating the engine.
Figure 8:
3. Obtain a TV control pressure gage block, service tool no. D84P-70332-A, or fabricate a block .397 +/- .007 inch thick (Figure 8). The following drill bit
shanks may also be used in order of preference: Letter X (.397 inch), 10 mm (.3937 inch) or 25/64 (.3906 inch).
4. Operate the engine until normal operating temperature is reached and the throttle lever is off fast idle or the Idle Speed Control plunger* (if equipped) is at its normal idle position. The transmission fluid temperature should be approximately 100-150~ F. Do not make pressure check if transmission fluid is cold or too hot to touch.
5. Set parking brake, place shift selector in N (neutral), remove air cleaner, shut off air conditioner. If equipped with a Vacuum Operated Throttle Modulator, disconnect and plug the vacuum line to this unit. If equipped with a Throttle Solenoid Positioner or an Idle Speed Control,* do not disconnect either of these units.
IMPORTANT: Do not make pressure check in Park.
6. With engine idling in neutral, and no accessory load on engine, insert gage block (or drill shank) between the carburetor throttle lever and adjustment screw on the TV linkage lever at the carburetor (Figure 8). The TV pressure should be 35 PSI +/- 5 PSI. For best transmission function, use the adjusting screw to set the pressure as close as possible to 35 PSI. Turning the screw in will raise the pressure 1.5 PSI per turn. Backing out the screw will lower the pressure. If equipped with Idle Speed Control, some *"hunting" may occur and an average pressure reading will have to be determined. If the adjusting screw does not have enough adjustment range to bring TV pressure within specification, first adjust rod at the transmission as described in the Shop Manual.
7. Remove gage block, allowing TV lever to return to idle. With engine still idling in neutral, TV pressure must be at or near zero (less than 5 PSI). If not, back out adjusting screw until TV pressure is less than 5 PSI. Re-install gage block and check that TV pressure is still 35 PSI +/- 5 PSI.
*NOTE: Idle Speed Control is only on 1984 3.8L engine with AOD transmission.
OTHER APPLICABLE ARTICLES: None
WARRANTY STATUS: "INFORMATION ONLY"