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View Full Version : Shep and TRE trannies, which one?


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Thor06
01-19-2007, 10:28 AM
Hey guys, after that other tranny thread, I got to looking at trannies. I got to looking over all the different tranny replacements/upgrades and I got pretty interested. Well, my question is not TRE or Shep, but which stage would be best. I mean obviously the top one would probably hold up the best, but what I need to find is which one is best suited for me.

I guess my main questions are synchros, gears, and center diffs. Keep in mind that my eventual goal is 480-525 hp, but it probably wont see more than what the big 16g can throw at it for a year or two. Also, I would like it to be able to sustain relatively high RPM shifts. Not like 10k or anything, but depending on what happens I would like to be able to rev out to 8500-9000 and shift accordingly. It will have DSMlink and I will be using the no lift to shift function. That said, here we go.

I see that you can get many if not all gears double synchro'd. Considering my goals, which gears (if any) would it be practical to double sychro? What about gears? I see that both TRE and Shep have stronger gears and I see that TRE even has some close ratio gears and shorter/taller gears. Granted, I want to keep the cost down, but would a stronger 1st, 2nd, 3rd, and/or 4th be necessary considering my goals? What about the center diff? I dont plan on running a welded diff or spool, but I am curious about the 4 spider center diff. Necessary? What will it improve?

What do you guys think? I decided to make my own thread rather than to continue to jack that other guy's thread.

Shane@DBPerformance
01-19-2007, 10:33 AM
Avoid TRE. A 4 spider center diff, aftermarket diff, or welded center diff is highly recommended. The center diffs are prone to breaking on launches on low 12 second and faster cars. When they break, things can get very expensive to fix.

Kracka
01-19-2007, 10:37 AM
TRE sucks, I will never do business with them again.

I had a BM Tranny and absolutely loved it, the TRE and Shep trannies I've driven did not feel as nice or smooth. There is no such thing as BM anymore, but TurboTrix took it over I do believe.

Halon
01-19-2007, 10:45 AM
http://www.hey-networks.com/dogboxracing/default.cfm

Just another place to check out. I have no personal experience with them, and there are only some reviews here and there, not many. Just another option for you though.

Kracka
01-19-2007, 10:49 AM
http://www.hey-networks.com/dogboxracing/default.cfm

Just another place to check out. I have no personal experience with them, and there are only some reviews here and there, not many. Just another option for you though.

Their prices are good, definitely worth looking into (hmmmmm, maybe they want a Laser tranny to work on).

Thor06
01-19-2007, 11:00 AM
Damn, quick replies, thanks guys! Thanks for the info on the center diff, since I am a cheap ass I think a welded one is in my future. How bad are they to drive? Is it a big pain in the ass?

What about synchros? I am sorta getting a feeling that 2nd is a good one to double syncho, yes?

Brandon, thanks for that site. I think they might have a Talon tranny to build with Chris's ;).

Kracka
01-19-2007, 11:03 AM
Do not get a welded center diff if you plan to street drive your car. Tight corners become a bitch with your car hopping around and your handling will be degraded. In my mind, this is a drag car only mod; but of course some will disagree. Definitely get the double 2nd gear synchro though.

Halon
01-19-2007, 11:25 AM
I also would say stay away from the welded diff unless this is a race only car. All wheels will spin the same, and every time your driving around in a parking lot you will be screeching tires.

CVD
01-19-2007, 11:49 AM
Not to mention digging deep ruts into fresh pavement on hot days and slowly destroying your rear axles.

Goat Blower
01-19-2007, 12:27 PM
And blowing xfer cases.

A tranny is not something I would save a $100 on from some no-name shop. Send it to Shep and get it done right. He's the best obviously and he's very fairly priced unlike TRE. You really don't need all the upgraded shafts and such, but I would get the 4-spider diff. All together mine was $1600 shipped which was replacing a few questionable parts, the 4-spider and his usual stage whatever build. I'm very happy with it.