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Old 03-18-2008, 08:13 PM   #1 (permalink)
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Gearbox Whine

I'm getting a whine on my S4C EK4 gearbox at very low speed. i have no other problems with it. Shifts well, doesn't crunch and mainly does this after cold start ups on morning. any idea what would cause this or how it can be solved? thanks

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Old 03-18-2008, 08:31 PM   #2 (permalink)
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Re: Gearbox Whine

It will whine a bit in 1st gear, especially when cold. I think this is normal. You can always try changing the fluid for good measure.
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Old 03-19-2008, 12:19 AM   #3 (permalink)
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Re: Gearbox Whine

change the oil
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Old 03-19-2008, 01:30 AM   #4 (permalink)
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Re: Gearbox Whine

great! thanks for the quick responses. was afraid that it would have been bearings or something. will order the Honda MTF asap!
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Old 03-19-2008, 11:07 PM   #5 (permalink)
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Re: Gearbox Whine

this happened to me before an the main bearing on the input shaft went...but try changin the oil first an see...if it still does it wit dif oil u need a new input bearing!
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Old 05-28-2008, 02:08 PM   #6 (permalink)
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Re: Gearbox Whine

hi guys. since i last posted here i've replaced the oil in my gearbox with Honda MTF. i must say that shifting is a ton smoother and it feels really good. i used to get a tiny vibration if holding the gearstick while driving and that's gone now.. the car sounds quieter as well. one thing i forgot to mention was that the S4C came with a factory. since the change i am positive that the LSD is working better do u guys know what kind of LSD comes in the EK4 SiR-II's S4C box??? as far as i know, the EK9/DC2 has a helical.
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Old 05-28-2008, 02:22 PM   #7 (permalink)
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Re: Gearbox Whine

helical aswell i beleive,, lathough if your car is an import it is quite common for the japs to replace teh helical diff with a friction plate type, does your car make interesting noises on full lock low speed turns!?!?
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Old 05-28-2008, 02:38 PM   #8 (permalink)
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Re: Gearbox Whine

This car came to my country and was sold brand new at a sole local Honda Dealership.. It's a 100% stock car with the exception of a set of Spoon mounts. thanks for the quick response. appreciate it!!

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Old 05-28-2008, 02:46 PM   #9 (permalink)
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Re: Gearbox Whine

shoudl defo be a helical diff then
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Old 08-28-2008, 12:05 PM   #10 (permalink)
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Re: Gearbox Whine

Hi there, the box on my EK4 has quite a noticable whine, loudest in second gear. Appears to be linked to road speed so I'd thinking an output bearing of some sort unless anyone knows better? Noise disappears after about 40mph when the frequency extends beyond audiable levels.

Will change the fluid soon, but I am planning on refurbing the gearbox within the next couple of months with MFactory ratios and would like a bit of advice on any bearings etc that would need changing.
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Old 08-28-2008, 04:05 PM   #11 (permalink)
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Re: Gearbox Whine

The only factory Helical LSD is the Type-R one, which is the same unit for the EK9 and DC2R. All other factory-option LSD's are Viscous

If you are going to be rebuilding your transmission, I would change all the synchro rings, seals and bearings, regardless of their condition.

Honda don't sell the synchro rings seperate from the hub/slider though, so you'll have to shop around the OEM parts stores.

Oh yeah, make sure to use Honda MTF, nothing else
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Last edited by MFactory; 08-28-2008 at 04:09 PM.
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Old 08-29-2008, 04:04 PM   #12 (permalink)
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Re: Gearbox Whine

Quote:
Originally Posted by MFactory View Post
The only factory Helical LSD is the Type-R one, which is the same unit for the EK9 and DC2R. All other factory-option LSD's are Viscous

If you are going to be rebuilding your transmission, I would change all the synchro rings, seals and bearings, regardless of their condition.

Honda don't sell the synchro rings seperate from the hub/slider though, so you'll have to shop around the OEM parts stores.

Oh yeah, make sure to use Honda MTF, nothing else

what about redline, amsoil, royal purple ...????
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Old 08-29-2008, 08:18 PM   #13 (permalink)
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Re: Gearbox Whine

Quote:
Originally Posted by MFactory View Post
The only factory Helical LSD is the Type-R one, which is the same unit for the EK9 and DC2R. All other factory-option LSD's are Viscous
arent the 88-91 civic/crx/integra clutch type LSD?
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Old 08-29-2008, 10:31 PM   #14 (permalink)
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Re: Gearbox Whine

I believe the cable trannies were viscous as well, but not 100%, would need to check
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Old 08-30-2008, 01:42 PM   #15 (permalink)
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Re: Gearbox Whine

Changed (or rather added) the box oil, problem solved. She is now silky smooth in acceleration and gearchanges. Seems the previous owner had neglected to check the oil level in quite a while!
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