GM Service Manual Online
For 1990-2009 cars only

Object Number: 1851020  Size: SH

Manual transmissions are identified by the number of forward gears and the measured distance between the centerline of the output shaft and the counter gear.

The 6-speed manual transmission (RPO M10), used in SSR, incorporates the following features:

    • An aluminum case
    • Fully synchronized gearing with an enhanced synchronizer cone arrangement:
       - Triple-cone: FIRST, SECOND
       - Double-cone: THIRD, FOURTH, FIFTH, SIXTH
       - Single-cone: REVERSE
    • An internal shift rail mechanism
    • Tapered roller bearings supporting the mainshaft and countershaft
    • Caged roller bearings under all speed gears
    • Solenoid inhibit of REVERSE gear during predefined forward motion

These features combine to yield a rugged, reliable system capable of handling input torques of up to 542 N·m (400 lb ft) for the M10.

The gear ratios are as follows:

Gear

M10 Ratio (:1)

FIRST

3.01

SECOND

2.07

THIRD

1.43

FOURTH

1.00

FIFTH

0.84

SIXTH

0.57

REVERSE

2.90

Reverse Lockout

A reverse lockout system, consisting of a reverse lockout solenoid which operates a reverse lockout mechanism, is utilized to prevent shifting into REVERSE gear when the vehicle is moving forward at a speed of 5 km/h (3 mph) or more.