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Are the MR 6spd Evos having the top gear grind issues that the GSR 5-spds are having?

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Old Oct 13, 2006 | 03:31 PM
  #31  
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Originally Posted by DaWorstPlaya
Over heating happens as a result of using an oil with lower viscocity that breaks down and becomes thinner thus resulting in more friction, weakening the gears.
I'm pretty sure that's exactly what I said lol.
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Old Oct 13, 2006 | 04:00 PM
  #32  
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Mine shifts perfect. I also change the tranny, center diff and rear diff fluids every 15k.
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Old Oct 13, 2006 | 04:20 PM
  #33  
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Originally Posted by lancealott
Ive never had grinding issues at all with my 03gsr and I have over 80k on it. I think it is due to driver.

I dunno, the Mitsubishi service bulletin on the 03/04 issues didn't say nuthin' about no stinkin' drivers, only that the 5th gear syncro was approved for replacement under warranty.

There were a bunch that had it done.

You guys with your sissy 2005 100k warranties shouldn't have a problem though, as long as you don't roll in with brightly colored cam gears peaking out from behind a clear cam gear cover, and a complete aftermarket turbo kit with matched exhaust manifold and external WG's staring back at the tech. They would likely have to considered that a modded powertrain.

My mech. was too happy to ignore the few extra modest bright shiny objects that I had added under the hood

(I made it easy to ignore by removing most items - of course you have to own a set of wrenches)
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Old Oct 13, 2006 | 07:52 PM
  #34  
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ive got about 20k on the tranny
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Old Oct 13, 2006 | 10:42 PM
  #35  
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I get a bit of grind in my 3rd gear, but nothing big.
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Old Oct 14, 2006 | 12:38 AM
  #36  
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Originally Posted by sonicnofadz
The 6 speeds have major issues with 4th gear going out (I'm guess its the synchro), where the 5 speed is much stronger but does have problems with the 5th gear synchronizer (at least in 03 they did).

I was told by a couple of guys at AMS the 6sps have issues if you intend to do some hp upgrades. Also that they seem to poop out in the taller gears. Fine for highway driving and if your keeping it stock. Thats not the first time I've heard that.

I was considering a IX MR for DD/RRtrack using light HP mods, Flash and some coil overs etc.

So if I get one I would go with the 5sp.

Last edited by WhtEvo05; Oct 14, 2006 at 12:56 AM.
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Old Oct 14, 2006 | 07:18 AM
  #37  
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There are no issues with the 6spd unless you plan to road race quite a bit, in which case your 4th gear will be prone to failure due to how tiny and weak the teeth are. What's happening is our 6spds are heating up to the point that the fluid can no longer reduce friction, and eventually the friction builds up and rips the teeth off.

Again, this is only if you do sustained road racing frequently. I made 200+ drag runs on my 6spd and 100 autocross runs without so much as a damaged synchro. My 6spd shifted like a hot knife through warm butter all the way up to the point when 4th gear let loose at 90mph while passing a riced out S14 on the road course IN GEAR (not while shifting).
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Old Oct 14, 2006 | 07:49 AM
  #38  
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Originally Posted by WhtEvo05
I was told by a couple of guys at AMS the 6sps have issues if you intend to do some hp upgrades. Also that they seem to poop out in the taller gears. Fine for highway driving and if your keeping it stock. Thats not the first time I've heard that.

I was considering a IX MR for DD/RRtrack using light HP mods, Flash and some coil overs etc.

So if I get one I would go with the 5sp.
finally someone smart....realize that most if not all case of the 6 speed 4th gear breakage is on vechicle with +10% hp over stock and that is wat cause addiional problems of the extra tourque and load going through the powertrain....and not using a stock clutch doesnt help cuz if the clutch doesn go somethning way more expensive willl....the 4th gear should be fine on any track with correct fluids and not more than 320ish hp...basically a tune and a few psi higher with a tbe....should be perfectly fine....and if does break you dont have to spend more than 2 hours going back to stock.....just my 2 cents and my plan for my car....
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Old Oct 14, 2006 | 07:50 AM
  #39  
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no problems here!

i love my mr hehe
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Old Oct 14, 2006 | 07:54 AM
  #40  
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Originally Posted by EVOIXMR8916
finally someone smart....realize that most if not all case of the 6 speed 4th gear breakage is on vechicle with +10% hp over stock and that is wat cause addiional problems of the extra tourque and load going through the powertrain....and not using a stock clutch doesnt help cuz if the clutch doesn go somethning way more expensive willl....the 4th gear should be fine on any track with correct fluids and not more than 320ish hp...basically a tune and a few psi higher with a tbe....should be perfectly fine....and if does break you dont have to spend more than 2 hours going back to stock.....just my 2 cents and my plan for my car....
No, it has nothing to do with horsepower or torque. Read my explanation above. It's due to how weak 4th gear is, which causes it to rip the teeth off from overheating. It would take an unbelievable amount of power to rip the teeth off 4th gear of any trans. Usually, extra power causes problems with breaking lower gears since there is more shock, but in 4th there is much less shock. Anyway, in my case, I was not even shifting. I was just accelerating in 4th while passing with only 300whp.
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Old Oct 14, 2006 | 09:22 AM
  #41  
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Originally Posted by EVOIXMR8916
finally someone smart....realize that most if not all case of the 6 speed 4th gear breakage is on vechicle with +10% hp over stock and that is wat cause addiional problems of the extra tourque and load going through the powertrain....and not using a stock clutch doesnt help cuz if the clutch doesn go somethning way more expensive willl....the 4th gear should be fine on any track with correct fluids and not more than 320ish hp...basically a tune and a few psi higher with a tbe....should be perfectly fine....and if does break you dont have to spend more than 2 hours going back to stock.....just my 2 cents and my plan for my car....
Not at all buddo, not....at....all. I think me, warr, and dwp pretty much summed it up.
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Old Oct 14, 2006 | 10:38 AM
  #42  
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Originally Posted by DaWorstPlaya
therefore only use the stock Super Diaqueen 6 speed tranny fluid at all times (75W-90 GL4).
Check your owner's manual. Pretty sure the SuperDiaqueen is 75W-85, not 90. I've been using MOPAR 75W-85 full synthetic fluid. Seems to work pretty wel, although all the fluids I've used (stock, MOPAR, and BG2) seem to get notchy after about 10,000 miles. The BG got notchy after about 6k.

BTW, I have no issues on my 6 speed and I have 40,000 miles on it now. THe MOPAR fluid solved the 2nd gear morning grind.
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Old Oct 15, 2006 | 01:50 PM
  #43  
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Originally Posted by atlvalet
Check your owner's manual. Pretty sure the SuperDiaqueen is 75W-85, not 90. I've been using MOPAR 75W-85 full synthetic fluid. Seems to work pretty wel, although all the fluids I've used (stock, MOPAR, and BG2) seem to get notchy after about 10,000 miles. The BG got notchy after about 6k.

BTW, I have no issues on my 6 speed and I have 40,000 miles on it now. THe MOPAR fluid solved the 2nd gear morning grind.
Doh! ... was typing in a hurry, the viscocity is 85 ... corrected. Thanks for the catch.

Warrtalon: Actually amount of torque over stock plays a big part in whether or not your car will survive the 20min plus track/road race session. In stock power level you could pretty much drive the car at the track the whole day (exaggerating) and not suffer any gear failure. But the higher the RPMs and the more torque over stock you generate the more prone to fatigue and failure the gear is. Higer RPMs generate more heat and more torque adds more stress to the teeth profile on the gear.
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Old Oct 15, 2006 | 07:56 PM
  #44  
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I have a 06 IV 5 spd with 600 miles, I am getting a grind when I go from 2-3. It does not matter how I shift, fast, slow. It started with 50 miles on it. I have followed the break in time and have not lunched it yet
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Old Oct 15, 2006 | 08:05 PM
  #45  
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06 MR - 3.8K miles with 4 track days - pure smoothness in every gear.
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