The Transmission / Differential FAQ

***TitaniumTT*** · 01-26-2010, 01:07 AM

I was also under the impression that the OD ratios were .84 for the RX8 box as well as the JDM S5/6 turbo trans. I could be wrong though

To answer Vex's question, no, I doubt you could swap internals. The mainshafts and countershafts are different diameters.

Normally I would say dive into the parts fiches and start comparing part numbers but this won't work either.

Just out of curiosity, why would you want to swap internals when there is very little that has to be done to swap the TII trans into the NA driveline. There's really not a big difference in ratios though so I would assume that you would do it for strength concerns as the gears are on the order of 30% larger. BUT, you get a lot of strength from the case as well and that's one of the reasons trannies blowup under huge torque, the case flexs and clearances are widened until the contact is such that teeth strip etc etc.

Now a 6spd

01-26-2010, 01:07 AM	#1
*TitaniumTT* Test Whore - Admin Join Date: Mar 2008 Location: Right Behind you son Posts: 4,581 Rep Power: 10	I was also under the impression that the OD ratios were .84 for the RX8 box as well as the JDM S5/6 turbo trans. I could be wrong though To answer Vex's question, no, I doubt you could swap internals. The mainshafts and countershafts are different diameters. Normally I would say dive into the parts fiches and start comparing part numbers but this won't work either. Just out of curiosity, why would you want to swap internals when there is very little that has to be done to swap the TII trans into the NA driveline. There's really not a big difference in ratios though so I would assume that you would do it for strength concerns as the gears are on the order of 30% larger. BUT, you get a lot of strength from the case as well and that's one of the reasons trannies blowup under huge torque, the case flexs and clearances are widened until the contact is such that teeth strip etc etc. Now a 6spd __________________ -The Angry Stig- DGRR 2009, 2011, 2012 & 2013 - Best FC DEALS GAP!! WOOHOOOO!!!!! 2015 Audi S4 - Samantha - Zero Brap S4 2004 RX8 - Jocelyn - 196rwhp, 19mpg fuel to noise converter 2000 Jeep Cherokee Sport - Wifey mobile - Now with 2.5" OME lift and 30" BFG AT KO's! So it begins 1998 Jeep Cherokee - 5 spd, 4" lift, 33" BFG's - Rotary Tow Vehicle 1988 'Vert - In progress 1988 FC Coupe - Gretchen -The attention whore BEAST! I'm a sick individual, what's wrong with you? I'm pure Evil I'm still insane, in the best possible way. I think Brian's idea of romance is using lube. Your rage caused the meteor strike in Russia. The Antichrist would be proud of his minion. You win with your thread. Most everything It's a truck with a steel gate on the back. Just a statement of fact Motec M820, AIM dash, ported 13B-RE Cosmo, 6-spd trans, 4.3 Torsen, custom twin wg fully divided mani, Custom 4" split into 2x 3" exhaust, Custom HMIC, Custom custom custom custom I like to welder stuff.... No Bolt-ons allowed. Dyno'ed @ Speed1 Tuned by me - 405rwhp on WG.... WM50 cuming soon. *-Angry Motherfcker Mode ENGAGED-**