M/T - Jumps Out of 4TH Gear
87porsche02Subject: Transmission Jumps
Out of 4th Gear
Model
911 Carrera
Group
3
Part Identifier
3582/83
Number
8705
August 19, 1987
Model Year 1987 (type 950 transmission)
The 4th gear sliding sleeve (1 in picture 1) and the guide sleeve (2 in picture 1) were modified to prevent the 4th gear from moving back into the neutral position while driving.
The groove around the inside of the sliding sleeve has been omitted. Instead, three pockets are machined on the inside of the sleeve. Also, the new guide sleeve is coated with a sliding lubricant.
From production dates:
January 13, 1987 sliding sleeve
January 21, 1987 guide sleeve
Transmission numbers:
950/01 74 H 04571 sliding sleeve
950/01 74 H 04834 guide sleeve
Part numbers:
928 304 231 06 sliding sleeve 3rd-4th gear
930 304 221 06 guide sleeve 3rd-4th gear
Work procedure:
In case of complaints of jumping out of 4th gear while driving, first check the shift rod adjustment as follows:
1. Lift shift diagram cap off shift lever knob.
2. Unscrew shift lever knob allen screw and pull off knob.
3. Dismantle center console, slide over shift lever and put aside (electrical equipment remains connected).
4. Measure distance between shift base bushing and shift lever with 4th gear engaged. Should be 5 mm (picture 2). If necessary, loosen shift base bolts and move shift base to obtain correct adjustment. Torque bolts to 23 N-m (17 ft. lbs.).
5. Reinstall center console and shift knob.
If no improvement, install both new type sleeves.
Refer to 911 Repair Manual Volume II Group 30 through 35 for repair instructions.
Note: Punch marks on level end of sliding sleeve (3 marks) must be aligned with balls of guide sleeve.