i have a quick ? do i need a ECU that came out of a 5 speed or can i just run the ecu that i have now that is in the car with a AUTO TRANS

 

stock ecu is the same.

 

What year is your car? If it's a Series 5 (89+), then you will need to disconnect the transmission computer before the car will run properly. I believe it's in the passenger kick panel.

 

Automatic transmission mounting point is 6 inches back from 5-speed mounting point because of the overdrive box in the automatic transmission.

Your going to need a custom transmission mount made.

 

that mount is easy to make, rotary ressurection has a how to. It like a 9 inch piece of steel with a hole in it.

 

am i still going to have to wary about the big asssssssssss nut

 

Wasn't saying it was hard. Just that it needs to be done. Good lookin out though.

 

Yes, you will. The torque converter essentially just rides on the input shaft, or may be lightly bolted to the ring gear (Where the flywheel normally would be located), but it's easy to take off... THEN you will need to remove the counterweight and the ring gear...that 'big *** nut' is a 'big pain in the ***'. Soak it down with PB and let it sit for a while while you locate a friend with a compressor and an impact gun that has about 500ft/lbs of torque at least! You'll need to park the ring gear...this can be done by shoving a heavy duty flatblade screwdriver through one of the open sections of the ring gear into the back of the engine casting.

 

You can actually get the flywheel nut off with a flathead and a hammer. If you have a impact gun at your disposal, I'd recommend using that as it'll take a fraction of the time, but if you dont, you can usually break it loose with a flathead and hammer.

 

Flatblade screwdriver?? And a hammer? Please, explain this to me.

 

Place screwdriver on large bolt at angle to loosen it. hammer till bolt turns.

I had to do it to mine as I was swapping my motor at about 2 in the morning and no auto shops were open for me to take it to to have the nut taken off.

Place it at shown angle and hammer away. The flathead will eventually dig a groove into the nut making it alot easier.

 

To the O.P., I do not recommend Novak's method. It sounds exactly like, well, a bad idea... Though it may work, that's damage.

Do it right, get an impact or a breaker-bar. Either will work, but make sure you park the ring gear!

 

dude, the easy way, you jam a socket in the back of the fly wheel wedged between the fly wheel and the long bolts. Get that big *** 52mm socket and a long breaker a bar with 5 ft of pipe

 

I've seen it done on several nuts that have come through the shop. Not by me either. 10-15yr old motors. Not everyone has a 54mm socket and 3/4in drive breaker bar just laying around.

I'm just giving options.

 

You're entitled to your opinion, I'm just not supporting it. No hard feelings or anything, it's just what it is.

 

Perfect time for a lightweight flywheel. Leave the nut alone.

 

Just did the auto to 5speed swap... I kept the rear end gears. But dang, First and second gear are Super long. I think i could cruise on the freeway in 3rd

 

BTW Dont use a screw driver...... You will break everything but the bolt off.. You Need a Big center punch. Hell i have a 52 mm socket and a air wrench. that got it off in 1.5 seconds

 

Yeah, I ended up keeping the 3.90 LSD. It's almost painful.

 

but the gas mileage makes up for it

 

No one ever wants to play after the end of 2nd gear. Can't figure out why, im only doing 100.

 

my snap-on battery gun rocked that flywheel nut right off and back on when i did my swap... took me about 4 days because i didnt know what i was doing + i had to make my mounts which is 2 steel bars on each side welded together, 4 holes drilled on each bar before welding... this basically extended my transmission mounts. i used all SS grade (10?11?12? whatever the highest grade there was at the time) and put everythign together.. now my car doesnt run for like 2 years now. lol i hope my gasoline isnt fucked.

 

3.9/4.1=.95


5% fewer RPM's is NOT that big a deal on the highway. Of course, in first gear, maybe second it will have a significant effect, but not at higher speeds.

On a turbo, it might even slow first and second enough to allow significant boost before you shift-so it could even be beneficial in that case!

Tell you what-if you still don't like that 3.9 LSD, I will swap you even for my open 4.1 from my S5 Vert.