1275 - automatic and manual differences

[minigreen94]

evening all, im now onto building a large bore engine and was just wondering, if i buy a 1275 a+ automatic and do away with the gearbox etc, am i able to use the block, crank, pistons and ancillaries built onto a manual box? or is there more differences? thanks alot

[ginettajoe]

[quote=minigreen94]evening all, im now onto building a large bore engine and was just wondering, if i buy a 1275 a+ automatic and do away with the gearbox etc, am i able to use the block, crank, pistons and ancillaries built onto a manual box? or is there more differences? thanks alot[/quote


....... block to gearbox different shape, different oil pump, different crank...... I think there are one or two other differences, but it is 15 years since I played around with them, so can't remember all!! HTH

[annodomini2]

It is possible, but not worth it.

[guru_1071]

the crank is the same, as are all the internals bar the oil pump (its huge as it pumps oil in the box as well) and the primary gear as it fine splined to suit the torque convertor.

the block is the same, but doesn't have the drillings for the oil filer and the bit where the oil pump bolts is not the same depth as a manual car.

its possible to do the machining to correct these two differences, but the cost is more than a manual block can be sourced for, so its not very economic.

I quite often buy autos as they are normally cheap, and just strip them to get the crank and rods out of them, most times the crank will be std/std as its normally the gearboxes that give up the ghost first. I just weigh the boxes and the blocks in for scrap