last night I notice that my NSX a 91 is grinds when I shift in high RPMs. when I shift after 5K RPM is grids. Does any one have any idea why its doing that?
shifting is grinding.
- Thread starter VampNSXX
- Start date
so I looked at the post that were befor. but my car shifts perfectly fine as long as I am not on high RPMs. I have no problems from 2nd to 3rd or any thing like that its just high RPMs.
I also was reading about trouble shooting a clutch. According to this it might be that I need to replace the clutch. I also have short gears on my NSX.
can any one give me some more info if possible. I truly hope its just that I need a new clutch, but if there is anything you guys might have experience that could help out I would like to here about it.
thanks
I also was reading about trouble shooting a clutch. According to this it might be that I need to replace the clutch. I also have short gears on my NSX.
can any one give me some more info if possible. I truly hope its just that I need a new clutch, but if there is anything you guys might have experience that could help out I would like to here about it.
thanks
I posted to some of those linked topics when I was having the grinding (crunching) problem. In my case, too, it was only noticeable at high RPMs (on the track). So I would guess that it is the hub selector (and possibly synchro) just like mine.
If the clutch is going, it will slip. If your clutch is not slipping, you probably don't need to replace it. However, they can take a look at it if/when they open up the tranny, and see how much friction material is left on your clutch.
If the clutch is going, it will slip. If your clutch is not slipping, you probably don't need to replace it. However, they can take a look at it if/when they open up the tranny, and see how much friction material is left on your clutch.
nsxtasy said:
how much did it cost you to fix it?
My recollection is that the labor was 8-12 hours and the parts were a few hundred dollars for the hub selector and about the same for the synchro, but I could be off.
The big expense is the labor in opening up the transmission. If you DO need a clutch, there's not that much additional labor on top of that, but the clutch itself is pretty expensive too.
The big expense is the labor in opening up the transmission. If you DO need a clutch, there's not that much additional labor on top of that, but the clutch itself is pretty expensive too.
Try doing a search for GM synchromesh transmission oil. My xmission had a high RPM grind from 2nd to 3rd and after replacing my trans oil with the GM synchromesh oil it has disappeared . So far I've put 7500 miles on the car and its still shifting perfectly.
Zennsx said:
ill try that this weekend since i am going to change the oil and plugs. might as well try that since I am going to be under the car.:smile:
Zennsx said:
is GM synchromesh OK to use in a NSX? were could i get it since I have never seen it any were.
VampNSX said:
It is commonly used on all honda trans for syncro problems and works. Its totally safe.
EndlessNA1 said:
thanks
could I get it in any auto store?
Vamp, Its a GM product. Call a local dealership. Just remember it takes a day or so to work,at least in my case it did .
Zennsx said:
thanks/ I just went to a GM dealer and got some.
Make certain you get the right mixture. If I recall correctly, you use 2 parts of one product with one part of another.
2 Quarts Friction modified - 1quart Synchromesh.
Zennsx said:
what is the diference? what do they do and were do I get the Friction modified ? is it a GM also?
what happens if you dont mix it?
I really have no idea what this does that why I ask.:smile
I really have no idea what this does that why I ask.:smile
VampNSX said:
You're tranny will disintegrate...
Just kidding :biggrin:
The 2 FM + 1 SM combo seems to work best, that's all. The FM is very thin and the regular SM is a little thicker.
Here's the link you need to have:
http://www.nsxprime.com/forums/showthread.php?t=36761&highlight=synchromesh
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I had that same exact problem, grinding at high rpm's, and then a few thousand miles after the clutch started slipping badly, but before it did i would double pump the clutch between shifts and it didnt grind so i figured it was the clutch, i cant wait to get the new exedy in for spring with the syncromesh and short shifter, its going to feel like a new car!
nsxtcy85 said:
Hmmm...did you have any tranny work done as well? Don't be surprised if the problem continues even after the new clutch is in.
Grinding in high RPMs and having to double-clutch are all classic signs of worn synchros and/or hub selector. Only if your old clutch was WAY out of spec would it cause anything remotely similar to what you describe. Just b/c a clutch slips doesn't mean it's out of adjustment. It may just be at the end of it's life and/or low on friction material.
I'd have had the tranny opened up at the time of the clutch work as the extra clutch labor would have become minimal. Sounds like you need a rebuild and the synchros replaced at the least.
Synchromesh F/M might help, but you're postponing the inevitable.
BTW, you will love the short shift block :biggrin:
Ski_Banker
Suspended
Apologies in advance for beating a dead horse - I've done the searches. Promise!
SO, my deal is grinding and VERY notchy shifting 1st to 2nd. Even when the car is very warm (although it does improve). At 60 degrees in the morning (sorry yankees :tongue: ) I have to be VERY careful making that shift.
To be clear - it ain't me: I've always driven manuals, never having to replace a clutch/tranny, and always Hondas/Acuras.
Here's the kicker: The car is brand new 05, just drove off the lot a few weeks ago. So, even though the FM tranny fluid deal might work - something isn't right to begin with on a new car. I don't want to mask any underlying problem. Thoughts?
SO, my deal is grinding and VERY notchy shifting 1st to 2nd. Even when the car is very warm (although it does improve). At 60 degrees in the morning (sorry yankees :tongue: ) I have to be VERY careful making that shift.
To be clear - it ain't me: I've always driven manuals, never having to replace a clutch/tranny, and always Hondas/Acuras.
Here's the kicker: The car is brand new 05, just drove off the lot a few weeks ago. So, even though the FM tranny fluid deal might work - something isn't right to begin with on a new car. I don't want to mask any underlying problem. Thoughts?
How many miles did the car have on it before you picked it up, and did it smell like moonshine? (Sorry Southerners:biggrin: ). It really doesn’t take long to hurt synchros, but before you or the dealer will opt to open the trans, you should try a different trans fluid. As you mentioned it did change some with heat, and that is a typical sign of fluid viscosity. Honda is aware of this issue and has suggested fluid alternatives that your dealer can research, but I have found that the existing Honda brand oil solutions are not as good as other brands with a heavier focus on this issue. I would suggest that you rely on the collective knowledge of the years of experience represented by Prime members, and try the oils they suggest. Honda teams don’t use Honda oil in their trans (Redline, GM?). Now with all that said, it’s not right to get a new car with problems so I would invite my dealer to share the problem. Maybe even bring them some reading material from Prime.Ski_Banker said:
so I changed the oil and oil filter and the tranny fluid. I did notice that it shifts better than befor but it still grinds a little at really high RPMs like after 7500 rpm it will grind a little but its much better than befor. befor it was if i did it any were after 6000 rpm's it would.
now the question is this I was reading about this and some people post that it takes some time to actually work at is optimal level meaning that I have to wait about 2 days of driving it so I could feel it working even better. is this true?
also last night when I took the car out for a drive when I came back it smelled like something was burning. like a oil burning smell in a way. I don't think it was a big deal since I did all that to the car and maybe I just dropped a little oil somewhere and it started to burn.
another stupid question sine I am obviously not very familiar with tranny fluids is what is the different between transaxle fluid and tranny fluid.? what would happen if you put transaxle fluid in the tranny or tranny fluid in a transaxle? just have to know since knowing is half of the battle. G.I.JOE a American hero. LOL
thanks:smile:
now the question is this I was reading about this and some people post that it takes some time to actually work at is optimal level meaning that I have to wait about 2 days of driving it so I could feel it working even better. is this true?
also last night when I took the car out for a drive when I came back it smelled like something was burning. like a oil burning smell in a way. I don't think it was a big deal since I did all that to the car and maybe I just dropped a little oil somewhere and it started to burn.
another stupid question sine I am obviously not very familiar with tranny fluids is what is the different between transaxle fluid and tranny fluid.? what would happen if you put transaxle fluid in the tranny or tranny fluid in a transaxle? just have to know since knowing is half of the battle. G.I.JOE a American hero. LOL
thanks:smile:
