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Upgrading / Reinforcing the 6 speed

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Old Mar 11, 2010, 08:47 AM
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Upgrading / Reinforcing the 6 speed

This thread is for all information on paths to upgrade the 6 speed transmission in the Evolution MR. TRE has been suspected of having a solution, now it comes to light that Shep has come out with something.


Discuss all options that you have chosen to upgrade your 6 speed, price (if you will), and how it reacts to your current modifications.

Pictures of gearsets, internals of the transmission compared to those previous will be displayed from a previous thread.

Consider this thread as a prelude to the discussion. Required reading, if you will.

Last edited by buchnerj; Jul 14, 2010 at 05:31 PM.
Old Mar 11, 2010, 08:49 AM
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Taken from the previous thread posted above:

Originally Posted by 4G63K
Call Shep Trans and see what they have to say about the 6 Speed Now


3rd ,4th and 5th gear upgrade



Next to the stock weak 4th gear that the 6 sp loves to eat.



Next to the stock weak 4th gear that the 6 sp loves to eat



Next to the stock weak 4th gear that the 6 sp loves to eat.

Supposedly the upgraded gear set Shep offers.
Old Mar 11, 2010, 08:56 AM
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figures i find out about this as soon as i put my stock rebuild six speed in my car lol
Old Mar 11, 2010, 08:57 AM
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I would certainly be interested in this.
Old Mar 11, 2010, 09:00 AM
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There has been some great discussion over it and I hope that some people who have actually had the transmission upgraded can chime in on how it feels and what the overall cost was. Who they went to and the limitations they gave them on its performance (i.e. how much tq it can handle, etc.).
Old Mar 11, 2010, 09:06 AM
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I know I'm definitely down if it tests well.


FYI
The TRE version was supposed to have a 4.11 final drive while the SHEP version is going to have a 4.09 final drive.
Old Mar 11, 2010, 09:10 AM
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Subscribed.
Old Mar 11, 2010, 09:46 AM
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finally some sort of answer.....excited and subscribed
Old Mar 11, 2010, 09:49 AM
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Is excited to see this! I love the 6 speed and wish to keep it and don't plan on making anywhere over 450whp so I think this would fit the bill perfect.
Old Mar 11, 2010, 10:03 AM
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If I have time, I will be calling SHep today.
Old Mar 11, 2010, 10:33 AM
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Originally Posted by Erik@MIL.SPEC
If I have time, I will be calling SHep today.
Thanks Erik, keep us posted. I too was going to call Shep and ask, but well see what he says to a reputable vendor first. If could do something that would be amazing, but I am also interested to see how much this whole thing will cost. It could be very possible that the price will be high enough to not even justify things and thus still making the swap to a 5 speed the better option.
Old Mar 11, 2010, 10:40 AM
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Originally Posted by buchnerj
There has been some great discussion over it and I hope that some people who have actually had the transmission upgraded can chime in on how it feels and what the overall cost was. Who they went to and the limitations they gave them on its performance (i.e. how much tq it can handle, etc.).
+1 Did shep actually do an official release of this product? I also wonder if sheps' new gear ratio provides a little more top end making it possible to see 196 mph ?
Old Mar 11, 2010, 10:50 AM
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Originally Posted by buchnerj
I am also interested to see how much this whole thing will cost. It could be very possible that the price will be high enough to not even justify things and thus still making the swap to a 5 speed the better option.
I expect to pay more for the six speed b/c it takes more time (man hrs ie: pita) to accomplish.

Last edited by 38six; Mar 11, 2010 at 10:55 AM.
Old Mar 11, 2010, 11:24 AM
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scribed.. my 6 speed is money though right now.
Old Mar 11, 2010, 11:54 AM
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A friend of mine has been in contact through email with Mr. Shepherd recently. According to him the 3, 4, 5 gearset is being tested in their drag car to make sure it can withstand lots of abuse. 4.09 Final drive gear confirmed. I believe the power figure being thrown around was 600 hp, got to double check that though. I'm not sure if that's 600 crank or wheel horsepower, and the torque figure is still a question mark.

Last edited by NYCFJV7; Mar 11, 2010 at 11:56 AM.


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