> 1) Is a gearbox with a J-type overdrive attached a straight swap for one
> with an A-type?
Basically yes, as a complete unit
> Does it need any of the ancillary bits, eg prop shaft, speedo cable,
> etc, or will it literally bolt straight in?
J type has different speedo outlet (cable) & rear mounting plate (which
bolts to the box)
>
> Are the A- and J-type overdrives interchangeable on the same or any
> gearbox?
The units can't be swapped as the spline & adaptors differ
> Can an overdrive be replaced leaving the gearbox on the car (lowered a
> bit for access) or is there some fiddly process with a bit of wire that
> can only be done with the gearbox upended?
A J type can but an A type is much more difficult
> If replacing an overdrive, is there any reason for choosing an A or J,
> eg strength etc, or doesn't it matter?
A J is best by a country mile
|