mxrider914

iTrader: (3)

I did a quick search and didn't find anything... I'm finishing up my s4 n/a to s5 t2 swap and I was just reading through the rotary resurrection article about it again and noticed it said not to mix the flywheels between series.

I'm still going to be running a n/a tranny until I can get a driveshaft to go with my turbo tranny so I am useing my old s4 n/a flywheel. Is this ok to do or is the diffrent weight going to throw something off?

Thanks in advance for any help.

RotaryRocket88

iTrader: (7)

No, you can't use an S4 manual flywheel (NA or TII) with an S5 engine. The rear counterweight is integrated, and will imbalance the rotating assembly. You need an S5 NA manual flywheel, or an S4/S5 automatic flywheel (or aftermarket light flywheel) with an S5 counterweight. The autos did not integrate the rear counterweight.

mxrider914

iTrader: (3)

Fuckkkkk and there I was thinking I might finally be driving my car soon. Guess I'll pull the tranny for the third time... Thanks for the info man.

mxrider914

iTrader: (3)

On second though I'm thinking I'll just buy the T2 driveshaft instead since I already got the s5 turbo flywheel. I was told you can drill out the n/a diff so it will bolt to the turbo driveshaft. Is this true?

RotaryRocket88

iTrader: (7)

If you're talking about bolting up a TII transmission and driveshaft to an NA diff, it is possible to drill/tap new holes in the pinion flange. But if they're not drilled correctly, you'll have the driveshaft imbalanced. They need to be evenly spaced from the rotational center; just like they are from the factory. You can also have a shop swap ends between NA and TII driveshafts to match the NA flange, or buy the Mazdatrix custom driveshaft.

If you're talking about using an NA transmission with a TII flywheel, it won't fit properly in the bell housing, and they starter won't engage the ring gear.

mxrider914

iTrader: (3)

I'm talking about t2 tranny and drivefaft to n/a diff. I can't afford the mazdatrix dirveshaft. Now if I take it to a shop how do they swap the ends? Do they cut and weld on the new end? Cause I'd hate to do that to the t2 driveshaft when I eventually want to get a t2 diff also.

RockLobster

iTrader: (7)

Don't do this. You WILL end up with a vibration, no matter how careful you or anyone else is.

Save up your coin and buy the right driveshaft. I THINK that you can accomplish this with a driveshaft out of an S4 automatic. Thus a cheaper used part than buying a new driveshaft.

EDIT: It had been a long time since i saw that info, it looks like you would need a pinon spacer or to have the driveshaft extended to make that work. And i think the S4 and S5 automatic driveshafts might be different lengths, thus my fuzzy recolection of an S4 being a better choice..(longer factory length) but do a search on the forums here and get the info straight...

mxrider914

iTrader: (3)

I found a good deal on on a t2 diff that comes with a 5 lug conversion which I also need. So I'm just gonna spend the extra money even though I don't really have it and do it the right way.

Thanks for the help guys.

RotaryRocket88

iTrader: (7)

All of the manual driveshafts are the same length regardless of series or model, but the auto driveshafts are 2" shorter. An automatic driveshaft has the same yoke and flange as the TII manual shaft, but the length is an issue. A machine shop could make a 2" spacer with precision drilled holes, but I'd never do it by hand.