Shifting Operation

WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Shifting Operation Diagram (AY6)

Courtesy of GENERAL MOTORS CORP.

The AY6 has a unique shift system. A single shift control shaft (281) operates 4 shift shafts. Shift control lever fits into a coupling on the shift control shaft (281). Positioning a bolt holds the lever (280) in place on the shift control shaft (281), in the gates of the shift shafts, operates the 1st/2nd shift shaft (211), the 3rd/4th shift shaft (231), the 5th/6th shift shaft (251) and the reverse shift shaft (271). Moving the shift control lever side to side allows the lever (280) on the shift control shaft (281) to engage into one of the 4 gates. Moving the shift control lever forward and reverse selects either position of the particular shift shaft. When shifted in position, a detent ball (300) and spring (301) located in the interlock bracket, holds the shift shaft, and a detent ball (287) and spring (288) located in the rear case, holds the shift control shaft (281). To aid in easy shift operation, the middle case shift control shaft bearing (282) and the rear case shift control shaft bearing (283) support the shift control shaft (281). In addition, the rear case shift shaft bushings (310) support the 1st/2nd shift shaft (211), the 3rd/4th shift shaft (231) and the 5th/6th shift shaft (251).

The 1st/2nd shift shaft (211) is the top shift shaft. A pin holds the no.3 head (212) in place on the shift shaft. No.3 head (212) links with 1st/2nd shift fork (210) via the reversal arm (213). The 1st/2nd shift fork (210) slides on the reverse shift shaft (271).

The 3rd/4th shift shaft (231) is the second shaft from the top. A bolt holds the 3rd/4th shift fork (230) in place on the shift shaft. A small shift shaft interlock pin (292) in the 3rd/4th shift shaft (231) prevents the other shafts from moving. Interlock pins (291 or 293), located in the interlock bracket, contact the small interlock pin (292) and lock into a notch on the shift shaft, preventing multiple shift shaft movement.

The 5th/6th shift shaft (251) is located third from the top. A pin holds the 5th/6th shift head (252) in place on the shift shaft. A bolt holds the 5th/6th shift fork (250) in place on the shift shaft. A small shift shaft interlock pin (294) in the 5th/6th shift shaft (251) prevents the other shafts from moving. Interlock pins (293 or 295), located in the interlock bracket, contact the small interlock pin (294) and lock into a notch on the shift shaft, preventing multiple shift shaft movement.

The reverse shift shaft (271) is the bottom shift shaft. Pins hold the reverse shift head (272) and the reverse shift fork (270) in place on the shift shaft.