COMPLAINT: After overhaul vehicle exhibits delayed and/or a shuddering condition, when shift lever is engaged into any forward range, followed by an immediate abort to “Limp Mode.”
CAUSE: The cause may be, that during the valve body cleaning process, retainer No.3 and/or one of the small “Buttons” in the solenoid switch valve train was not installed during reassembly. These parts can usually be found in the bottom of the solvent tank.
CORRECTION: Install the solenoid switch valve train and retainer No.3 as shown in Figure 1.
NOTE: Retainer location No. 4 and Torque Converter Clutch Switch Valve Train shown in Figure 1 are for “92 ” and later only!
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COMPLAINT: Some vehicles equipped with the 42RE transmission may exhibit a “buzzing” noise while the manual selector lever is in the Reverse position. Find obd2 code reader ?
CAUSE: The cause may be, the Pressure Regulator Valve buzzing because of a partially clogged main filter, or may be the PR valve itself.
CORRECTION: First install a brass “Screen” in place of the felt media filter in the bottom pan, as shown in Figure 1. If this does not cure the condition, replace the aluminum PR valve in the valve body with the previous design steel PR valve (See Figure 2), available under OEM part number 4130169
Pressure Regulator Valve (Steel) ………………………………………………………………… 4130169
Brass Screen (Aftermarket ATC) ……………………………………………………………….. 12010D
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CHANGE: Beginning in the 1998 model year, General Motors added a new design “Bolt-On” bellhousing that is approximately 1/2″ deeper than the previous design. The best identification is the added bolt hole at the top of the bellhousing, as shown in Figure 1. The new design bellhousing is designed to accommodate a new 300mm torque converter, and in the 1998 model year was used only in the Firebird and Camaro. All other models in 1998 used the 298mm converter which required the bellhousing shown in Figure 2. Currently the 300mm converter is used in many more models.
REASON: To accommodate the new 300mm torque converter.
(1) BELL HOUSING – Now has an added hole at the top of the bellhousing and is approximately 1/2″ deeper to accommodate the new 300mm torque converter (See Figure 1).
(2) PUMP COVER – Now requires a stator shaft that is approximately 1/2″ longer to accommodate the new 300mm torque converter (See Figure 3).
(3) TURBINE SHAFT – Now is longer and has the “O” ring behind the splines, as illustrated in Figure 3, to accommodate the new 300mm torque converter.
None of the parts listed above will interchange with previous design parts and the 300mm torque converter must be used in the models they were intended, and 298mm torque converters must be used in the models they were intended for.
Figure 1: http://goo.gl/QsEff
This style bellhousing and the 300mm torque converter also require a new design turbine shaft and stator shaft that are approximately 1/2″ longer than the 298mm torque conveter models. The hot car tools like VAG K Can Plus 2.0 and AK500+ Key Programmer are also helpful for you to solve the problems.
Figure 2: http://goo.gl/XGHkL
Figure 3: http://goo.gl/AXIFg