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Leaking transmission - engine oil?!

 
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Old 10-18-2012, 12:54 PM
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Leaking transmission - engine oil?!

So I'm pretty damn sure my transmission is leaking. I took a look underneath and found that it was leaking from where the axle meets the transmission. I was suspecting maybe a worn seal, but my shop teacher told me it was more than likely a worn transmission bushing. Mind you this is on the passenger side.

There's another dilemma however. . . it is not tranny fluid leaking. In fact no tranny fluid is leaking. It's all engine oil. I'm under suspicion that my transmission was filled with engine oil by the previous owner rather than tranny fluid as a "temporary replacement."

My 1st gear syncro feels worn as hell, and it grinds quite often going into 5th (especially over 50 mph). This is probably the cause of that.

So my questions are: Could it be the bushing, or the seal? And also could incorrect fluid cause my grinding issue? And could fresh fluid fix the problem?
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Old 10-18-2012, 01:32 PM
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Re: Leaking transmission - engine oil?!

Have you checked what kind of fluid it has in the tranny? Your able to put motor oil but I rather put Honda MTF. I have the same problem as you. My leak is minor but I know for a fact it's not my tranny leaking. I few drops come off the tranny from the block. Have you cheked the O-ring where the oil filter goes? That would be an easy fix to start. Jack up your car and put it on jack stands and try to see where the leaking is coming from. I doubt it's the oil pan, since not much pressure is there. Maybe distributor, hopefully not main seal.
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Old 10-18-2012, 01:51 PM
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Re: Leaking transmission - engine oil?!

I forget exactly which viscosity engine oil you can TEMPORARILY use in the tranny, I wanna say 5-30, not positive about that.
If the synchro is already on its way out, there's no way of band-aiding the problem with different fluids, the only correct way is to change the synchro. The bandaid method would be to experiment with different fluids and see which it grinds the least with.

It may in fact be leaking from the axle seal, pretty easy to fix once the axle is out. Might as well drain the tranny and refill with new fluid while you're already doing this job.
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Old 10-18-2012, 02:07 PM
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Re: Leaking transmission - engine oil?!

im not 100% sure about our preludes, but i know some manual transmissions use 10W-30 motor oil, as well as some using gear lube (75-90 or 80-90) or even auto transmission fluid.

could be a trans leak, not an engine leak. and i wish it was as easy as checking your oil level, but i know my car burns through like a half quart of oil per full tank and from what i've heard that is pretty normal
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Old 10-18-2012, 02:50 PM
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Re: Leaking transmission - engine oil?!

Hmm Idk much but I found switching to synthetic can cause leaks too? Maybe its that?
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Old 10-18-2012, 04:17 PM
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Re: Leaking transmission - engine oil?!

If the oil is coming out where the axle goes into the transmission it most likely needs new axle seals. As far as the grinding it might not be too late. In my integra LS I was grinding when shifting into a couple of the gears, much like yours is doing. I drained the motor oil that was in the transmission and filled it with honda mtf and ever since then NO grinding :). So yes, fresh fluid can fix the problem. It did for me.
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Old 10-18-2012, 05:36 PM
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Re: Leaking transmission - engine oil?!

axle seal mine was doing this
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