Not that I'd want to lose the extra gear but in the event of irreperable damage to the transmission (due to increased power and/or hard use), can the 6-spd MR transmission (MY2006) be replaced with an upgraded/strengthened 5-spd from Shep?

Would there be any negative side effects from doing so (aside from losing the extra gear)?

 

+1

 

yes it can be replaced with the 5-speed. and there are no negative side effects. well, none that i have experienced.

 

Has anyone ever taken a 6spd and put the 4th gear from the 5 spd in but left 5th and 6th? Or maybe this is impossible because of the width of the gears. I think it would be sweet to have a taller 4th gear, but still keep the 6 spd.

 

The gears are not interchangeable between the 6 speed and 5 speed. The 6 speed was built by Aisin. I am not sure who built the 5 speed.

 

im a fan of the 6 speed and would like to keep it that way but the power mods im trying to go for everyone tell me its not worth staying with a 6 speed is there anyone else who has around 500hp plus with a 6 speed and no problems?

 

^ Yes, I'm running 6 speed with power ~500hp.
I do face problems during hard power shifts but till todate gearbox is handling efficiently during normal racing/launches. I will not change internals of my box untill somethings says "bye-bye"...
Secondly, mine is JDM and I'm not sure if there is any difference between JDM & US material or something.

 

I also love the 6 speed
I will be running close to 600, i dont launch the car and we busy building a tranny cooler for it..


I feel the 6 speed is a great box, might not be the strongest but it sure is nice.

 

Jon at TRE should have a custom (read stronger) gearset for 4-5-6 coming out in the near future. Last time I had contact with him he mentioned that it should be available in the fall sometime.

 

I converted from the mr 6 speed tranny to a shep built tranny!!! Very Strong gearbox!

 

Orly? That sounds promising. I think I'll order some T fluid from you soon. about that time...

 

That would be super cool...

I love the 6 speed.

 

I too am very interested in seeing this.

-Jalal

 

i just broke my TRE

 

Power? Torque? Circumstances? Nothing is indestructable.