Sonnax has provided the following guide on critical wear areas and vacuum test locations for the GM 9T series of transmissions. Technicians working on these models should find this guide helpful.
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Sonnax has provided the following guide on critical wear areas and vacuum test locations for the GM 9T series of transmissions. Technicians working on these models should find this guide helpful.
You may find that these transmissions have a late 1-2 and 2-3 shifts along with high TV/line pressure.
The complaint
Before or after repairs, you may find that Chrysler RH and RE series transmissions have a late 1-2 and 2-3 shifts along with high TV/line pressure. OE idle line pressure specification is 55-65 PSI in the drive range.
The cause
The culprit here is mismatched TV plunger, bushing and retainer bracket (See Figures 1, above and 2, below). Figure 3 illustrates the difference in the TV cam shaft length between a TV cable system and a TTVA system.
The lower resistance and higher resistance solenoids are not interchangeable.
When the torque converter housing is bolted to the transmission case in an Allison 1000, the geartrain is locked and will not rotate.
General Motors designed the 6T70/75 transmission fluid pump to be a non-serviceable component.
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