Just how bad are the MR 6-Speed Transmissions?
#61
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Ive blow up two one took a little cause the car was more stock then another was on a more modded cammed evo 9 blew it up in 2 days after owning it took one hard launch. Would recommend a 5 speed for all people out there that already dont have one
#63
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On the track, after a HARD HARD 20 minute session at Road America on a warm day, I can see temps spike over 300.
All temps in F.
From what I heard, anything over 250ish can be trouble... which is why I won't put a rebuilt tranny in again w/o a tranny cooler.
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#65
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There is no major problem with the MR transmission. The 5 speed may be slightly stronger, but the MR's 6 speed is pretty strong also...Just maybe bit less strong than the 5 speed...That's all. No need for anyone to regret getting an MR. It was an excellent choice for me, it still is, and it always will be. The end.
On the flipside, I did at least 250 drag runs without a hint of damage to the 6spd - not a single grind or notchy feeling in any gear. It was a much more enjoyable trans than my current 5spd, but due to all of my racing, I felt the need to swap.
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I've seen your posts on the matter before, but once again, would you (or anyone watching this thread) recommend any preventative measures on the 6sp, such as a trans cooler? Or is it better to accept the inevitable and save my money for a new 5sp when it does give in?
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Since it only took two days for it to go blow'd up, perhaps your launching was the reason?
BTW, I have 92,000 miles on my 6 speed.
Last edited by Erik@MIL.SPEC; Aug 14, 2008 at 09:59 AM.
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I drag race with my 6spd. i currently have 50k on it and am the only owner
Everything is still fine for my daily driving, but when im racing and shifting harder my 4th gear is getting a little weak and some grinding into all the gears. even reverse is a little tough to get into. I have launched my car prob 50 times atleast, along with plenty of rolls.
I do want to switch over to the 5spd. I am hitting my revlimiter in 4th gear right at the line of a 1/4 mile @ 122.
So you could say I dyno'd at 440/400 on dynapak and its holding fairly strong still with 50k
Everything is still fine for my daily driving, but when im racing and shifting harder my 4th gear is getting a little weak and some grinding into all the gears. even reverse is a little tough to get into. I have launched my car prob 50 times atleast, along with plenty of rolls.
I do want to switch over to the 5spd. I am hitting my revlimiter in 4th gear right at the line of a 1/4 mile @ 122.
So you could say I dyno'd at 440/400 on dynapak and its holding fairly strong still with 50k
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#73
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my 2nd gear started to grind before anything else...everything works fine if im easier on it.
i guess i should rephrase that when im on the track driving hard 4th gear is the only gear giving me problems. but like mentioned by others, only when its hot, when the night gets cooler out my gears run fine.
i guess i should rephrase that when im on the track driving hard 4th gear is the only gear giving me problems. but like mentioned by others, only when its hot, when the night gets cooler out my gears run fine.
#74
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- 45K miles
~300whp/300Tq
- 140-150 launches at the strip
- Probably 20 autox events (4 or 5 launches each event)
- Stock fluid every 10-12K miles.
- Exedy Twin SD since 40K miles (stocker was still good, though).
Not a problem, yet. No grinds or unusual noises. It shifts about the same as it was new.
I'm still not very confident running it on a road course, from what I've seen on this forum, though (not until I get a trailer to drag it back).
For drag racing and Autox, however, I think it is a very capable gear box. Launching/driving hard in the lower 3 gears don't hurt this tranny, it's the heat and torque in higher gears that seem to be it's kryptonite (gathered from others).
~300whp/300Tq
- 140-150 launches at the strip
- Probably 20 autox events (4 or 5 launches each event)
- Stock fluid every 10-12K miles.
- Exedy Twin SD since 40K miles (stocker was still good, though).
Not a problem, yet. No grinds or unusual noises. It shifts about the same as it was new.
I'm still not very confident running it on a road course, from what I've seen on this forum, though (not until I get a trailer to drag it back).
For drag racing and Autox, however, I think it is a very capable gear box. Launching/driving hard in the lower 3 gears don't hurt this tranny, it's the heat and torque in higher gears that seem to be it's kryptonite (gathered from others).
Last edited by kiley_sean; Aug 29, 2008 at 01:16 AM.