A413 8 hole into 6 ? help !!!

[Brandon_B]

can anybody tell me how to swap an 86 A413 auto (turbo) with an 8 hole flywheel 4 hole torque converter, into an 85 model that used a 6 hole flywheel 3 hole torque converter ?

[Screamin4banger]

wont the 85 torque converter work with the 86 trans?

[ol"blue]

You can buy what I call a "Bastard" conv. It has 3 flywheel attachment holes,
but the newer '86 & later style pump drive on the rear. Used it when I installed one of my '85 blocks in my sons '87 'Baron TI auto. Bought it at a tranny supply outlet in Mich. Cost around $160 bucks.

[Brandon_B]

thanks for quick replies. No the old torque converter wont work. Can i get more info on this bastard flywheel ??? it sounds like you been here before, do i have to make any other modifications ? looks like the starter off the 86 will also have to be used ?

[ol"blue]

If I'm understanding you correctly, (and this is what I did), you want to use an '86 turbo auto trans with an '85 turbo engine? The '85 crank has 6 coarse thread bolts that hold on the flex-plate, while the '86 & later has 8 fine thread
bolts that hold on the flex-plate. One year flex-plate has 3 torque convertor attaching holes, while the other has 4. Also the pump-drive in the trans was changed for '86. So to use an '85 eng. and flex-plate with an '86 trans you need a special torque convertor that has the bolt pattern for the '85 flex-plate, but the pump drive on the rear for the '86 style pump. I got one from a tranny supply shop in Mich., but they're not that uncommon. In fact, you can get it with several choices of stall speed's. No, Bastard isn't the name brand, but that's what they called it. I just stole the word from them.
They were near Hazel Park Race track. That's where they race horses. Someone on here who's in that area should be able to help further.
Any help guys? Use the '86 starter also, yes.

[Brandon_B]

thanks Blue, you got it right what im trying to do. Hopefully someone from that area sees this and can give me part numbers and or locations. Or a good price on an 84-85 rebuilt / or good condition tranny. cmon guys anybody out there ??????????????????

[Brandon_B]

someone else suggested swapping the crank from the 86 to the 85. can anybody tell me if this will work ? thanks

[moparfreak3]

You would be a lot better off just getting a custom torque converter or flexplate. Changing out the crank would be a lot of hassle just to use a different transmission.

[jimbo729]

If I remember the last time I encountered this I either changed the pump gears or the whole front pump and used the flywheel and converter for the crankshaft you have.

A converter remanufacturer can weld on the correct converter hub, but will take longer and be more expensive than finding a correct (perhaps even used) pump.