I'm feeling like my "new" 03 Transfer Case is a ticking time bomb! I'm wondering if anyone who has installed an RS helical TC in their 03 GSR has discovered any major flaws or breakage issues with slightly increased whp (just under 300). Please advise!

 

what power are u running ? its crazy to read threads like this and some people are not running near what others are with being fine...


evoisdream

 

I'm running a full BR turbo back with test pipe, BR intake, upper IC and mini battery kit, Exedy twin disc, MBC with a Dynoflash mail-in set for 20.5 with 93 octane. I haven't dynoed, but I'm pretty sure I'm not to the 300+ whp territory.

I've already fried one OEM TC, and am on my second --- so I'm thinking that my driving style (although reserved) isn't soft enough for the OEM part. Maybe helical is the way to go?

 

Stop dropping your clutch. This is part of your car teaching you how to drive.

 

Good advice, EvoTexas, but I learned that lesson after TC #1. I'm actually thinking about switching clutches to the ACT Street Single so the clamping force doesn't send as much "shock" to the driveline, but after spending 1200+ on a clutch, that move seems like a step backwards.

 

Hmm, TurboTrix races their 700 WHP Evo on an ACT. I hear the Exedys don't do a good job at holding power and launches. I think you'd be making a step up. Price doesn't dictate function or quality. Price dictates price.

 

That's probably what I'll need to do about the clutch, but even then I think the RS helical would be a logical swap. Not just in durability, but (as I'm told) in traction as well.

Clutch change = NEEDED (agreed)

Transfer Case upgrade = problematic???????

 

Well, I don't think you NEED another TC unless you want the LSD. I have 340 WHP on pump and more on race and I haven't seen any sign of failure. I do drag race it also. However, I am on the stock clutch turning 1.7 60 foots (100 WHP ago). I think first you should adjust your driving style and I think you might also want to call TurboTrix to ask about their front differential options.

 

Hmmmmm interesting ---- do you have TurboTrix's business number? I'd like to see what those options are.

BTW, thanks for the responses. Good stuff.

 

Their website sux but I found it...

Phone: (732)572-6866 Fax: (732)572-6733

Business hours: Monday-Friday 8am-6pm Saturday 9am-4pm EST

 

Thanks for the assistance! Much appreciated!

 

I agree with evotexas. You need to change your driving style and your transfer case will live a long time.

 

My driving style is called "daily commuter." I don't drop the clutch or race in any way, and haven't been able to exploit the potential of my evo since I blew the first transfer case. I just wish I had faith in my car's ability to endure through any type of punishment without costing my a couple grand, that's all. Basically, I want to make the car tougher and correct what I believe to be a flaw in the 2003 evo drivetrain design.

 

By changing your driving style, we mean change your launching style. If you slip the clutch, it'll cushion the load that gets sent down the driveline when you launch. There is no design flaw. Our drivelines were never designed to take the shock loads of a high rpm clutch drop.

Remember, if you get wheel hop, let off the gas. If your front wheels start hopping, it grips, spins, grips, etc.. this sends shockloads into the spider gears in your front diff. You can beef this part up by upgrading to the quaife RRE's developing. The RS front LSD is slightly stronger. According to RRE, it's strength is questionable above 300whp.

 

Well said. I appreciate the explanation, and am very interested in the Quaife LSD, but I'm not sure when it'll be on the market. Till then, I'm driving very subdued, and yes, slipping the clutch like mad in order to avoid the launch style you mentioned.

So is RRE going to give us an update on their development anytime soon?