Pontiac Solstice Forum - View Single Post - 6 speed manual transmision in the Solstice

Cadillac uses an Aisin AY6 6 speed in the V6 CTS. Its capable of handling 255 lb-ft of torque, higher than the AR-5's 225 lb-ft rating. The bell housing is different as is the shape of the gear box and the shift linkage is in a completely different location. By the look of it, no way it would easily transplant into the Solstice.

OTOH, it may be possible to transplant a couple of its cogs to improve the ratios in the AR-5, 3rd, 4th and 5th gears in particular. IMO, all three of these gears are too tall in the Solstice. If the gears could be transplanted, the ratios would change from:

3rd: 1.37 to 1.53
4th: 1.00 to 1.15
5th: 0.73 to 0.79 (6th gear in the AY6)

This would give the Solstice a closer ratio lower four gears with a useable 5th gear overdirve. The distance in ratio from 4th to 5th would increase, but that's a bit of a small price to pay if your interest is in spirited backroad driving or track day fun. In those instances, you won't visit that very tall 5th gear much in the first place.

	Breeze Founding Member Join Date: Feb 2005	Cadillac uses an Aisin AY6 6 speed in the V6 CTS. Its capable of handling 255 lb-ft of torque, higher than the AR-5's 225 lb-ft rating. The bell housing is different as is the shape of the gear box and the shift linkage is in a completely different location. By the look of it, no way it would easily transplant into the Solstice. OTOH, it may be possible to transplant a couple of its cogs to improve the ratios in the AR-5, 3rd, 4th and 5th gears in particular. IMO, all three of these gears are too tall in the Solstice. If the gears could be transplanted, the ratios would change from: 3rd: 1.37 to 1.53 4th: 1.00 to 1.15 5th: 0.73 to 0.79 (6th gear in the AY6) This would give the Solstice a closer ratio lower four gears with a useable 5th gear overdirve. The distance in ratio from 4th to 5th would increase, but that's a bit of a small price to pay if your interest is in spirited backroad driving or track day fun. In those instances, you won't visit that very tall 5th gear much in the first place.