>Correct. Except that the reduction of the alpine unit is 0.8 and the
>Volvo unit is 0.75. For those following another thread, the D type
>overdrive has the solenoid on the passenger side (for those of us living
>in the Americas) and has 3 hex plugs on the bottom for access to the
>internals. On the J type, the solenoid is on the drivers side and the
>bottom has a ribbed access cover plate.
Not quite,
25% overdrive is 1.25, which the reciprocal (drive ratio) is .8, not .75, so the Volvo unit is correct gearing for the alpine.
Jarrid