dbgoodwin

yeah, but did you do it to a 700 horsepower car using a stock 4l60?

Its just pointless. The OP can either baby his t56 or baby a 4l60 until he can afford a built transmission. He isn't going to get the benefit of an auto by using a stock trans behind that much torque. Why bother doing it if you can't use it?

C5 Pete

You're missing the point.

He wants to drag race it. He wants to swap to an auto, but doesn't think he can swing a fully built auto trans at this time.

He should swap it and sell his manual trans stuff to offset the cost before he breaks it.

He'll have plenty of fun driving an auto Z while saving up some coin for a built trans. Just because he has lots of power, doesn't mean that he's going to use all that power all the time.

Like the guy that brags about having a 1000hp car. How often is his engine actually making 1000 while he's driving it? Probably less than 1%.

A stock 4l60 can live for a while in his setup.

Rob 02

A built drive-line cost around $7k+ core for trans,converter, differential, etc... so I kind of get it. Why send in a perfectly good trans to be rebuilt just to have the week parts changed. I would just be cautious and understand the difference in torque and applied torque (actual turning force felt in the drive-line components at a given time). At launch there is a ton of applied torque but at cruising speeds not so much regardless of what the engine is producing. Be prepared to tow the car if you get crazy.

dbgoodwin

exactly. So he's going to see zero benefit from going to the auto. Why bother doing all the work if you can't see a benefit? If he drives the car hard enough to see a quicker time, it's going to break.

Why not just drive it how it sits until he can do it right?

It would be like putting in an LS6 clutch in a 900 horsepower ls1 just because you can't afford to buy a nicer clutch right now. The benefit of an ls6 over an ls1 is so negligible that it makes no sense.

Either way, he can find plenty of information in the tech/fi sections.

Rob 02

Personally, I would rather do it nice than do it twice even if it means saving or borrowing. If you look at the long term benefit it is usually cheaper.

The OP may have some sticker shock.

Now that I think of it, the stock A4 cant handle double the HP it was intended for and I would hate to be the guy spilling fluid down the track.

C5 Pete

$7k??? Holy hell! Where are you guys buying stuff?

For $7k I'd be pretty tempted to sell my entire TH400 conversion setup. Flexplate to differential.

It's not rocket science to build a pretty strong auto for these cars.

Drewstein

They're talking full drag setup including diff I think.
A decent trans can cost half that number easy. Then you add in a built diff and shafts etc you're easily at $7k.
I know my TH400 with SFI housing on it was pretty expensive not counting rear end and the supporting stuff like converter etc.

C5 Pete

SMH...

I should have known better than to visit the general section. I was bored...


Continue on... spend your money however you want...


To the OP. Visit the FI section to learn how to do the swap.

It will cost a lot less than the naysayers in this thread are leading you to believe.

Forcedvert

It will break quickly........ ask me how I know I agree on waiting until you can have a built one.
I also agree on visiting the FI section, search and read about all that can/will happen to a stock A4 with that much torque and HP.

I paid for many things twice

good luck

dbgoodwin

was waiting for you to reply haha.

Forcedvert is probably one of the best to ask about the setup, very honest and down to earth about his car.

USMCZ06

Thanks for all the input guys.... the car is going auto at some point but i'll play with the 6spd a little longer. Got some motivation to bang so gears. rather sell the M12 healthy before i break it up lol well see what happens.

USMCZ06

Thanks... I'll take a look at the suggested info, I drag race bikes too i deal with this all the time when people dont understand that a longer swing arm is functional on a drag bike. lol

Rob 02

It is nice to hear you'r input.