Nars GSL-SE the 'White Comet'

[scarsofcarma]

I'm getting a constant on-throttle or in neutral but not while car is rolling vibration. It's gotta be the transmission so car is going under the knife again. Gonna swap in an S4 FC Turbo II transmission and likely Kia Sportage gears.

[spirit r]

I bet your undertray doesn't look this clean

What do you think about german untertray?

[scarsofcarma]

ooo shiny! I'm not a huge fan of chrome though. That's not stock is it? (I have little knowledge of what they did with RX7's overseas)

[spirit r]

>I'm not a huge fan of chrome though<
I'm a huge fan of durability so I benefit from sth. what I doing cheap 25 years ago.
mazda make a lot of parts only yellow passivation you know. This is not as good as chrome.
Thomas

Chrome-Mercedes-SLR.jpg (62.09 KiB) Viewed 3839 times

[scarsofcarma]

Here's the transmission options. On the left is the GSL-SE, in the middle is the non-turbo FC and on the right is the S4 FC Turbo TII.




Now I've been reading up about swapping FC transmissions into an FB. They all seem to say that you can swap the rear tail section from an GSL-SE transmission unto an FC transmission to make it sit properly.

Well after visualizing and measuring them up against each other I can tell you this is not required. The FC transmission tail-section and shifter location is exactly the same as the GSL-SE transmission. Only difference is the gear ratio's.



You can see that the shifter location on the TII transmission is about an Inch further back then that of the non-turbo FC or FB transmissions. There is an option to shorten the shifter housing on the TII transmission to make it fit as demonstrated by this video... (note: in the video he's talking about modifying it to fit into RX2's and RX3's that use the older SA style transmission which is much shorter. For use in an FB, A TII shifter housing only has to shorted by 1 inch.)

http://www.youtube.com/watch?feature=pl ... _kUr5ZcaH8

Bolting the tail-section of the FB tranny unto a TII transmission is not an option as you can see here from the bolt pattern on the casing.





Not to mention the difference in the output shafts. Turbo's have a thicker one with 23 splines... non turbo's have a thinner one with 22 splines. It would be possible to make a custom driveshaft to match the turbo output shaft with a non turbo driveshaft.

However, modifying the TII shifter housing and making a custom driveshaft isn't something I feel like doing right now. Down the road if I'm making enough power to warrant the need for a TII transmission I will. But for now, a non turbo FC transmission will suffice.

[scarsofcarma]

And this is likely the cause of my horrible vibration... a bad transmission crossmember mount. You can see the rubber has totally detached from its mount.

[scarsofcarma]

So I installed the FC transmission with a good transmission mount and it shifts great (thanks to Redline) but there was still a vibration issue. So I decided to re-lash the rear end but when I removed the driveshaft again I saw this...



So time for a new driveshaft. The rear end does have a little play in it also so I will be adjusting that as well. (Until I find 4.78 gears sometime soon I hope.)

[scarsofcarma]

I found something good to read

[Lucky]

That looks like a good find. If you could arrange to have that available in PDF online format before the end of the week, thanks

[DB RX63]

I think you will find that it is in the Library here, if not, I have a PDF.