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Posting this for my buddy who keeps having trans issues. His original trans started grinding into 3rd about a year ago. He got a rebuilt trans from syncrotech and that trans was grinding too. Sent that back, got a replacement from syncrotech and all was good for the past year. Now its starting to grind/clunk again going from 2nd to third shifting normally. His motor is stock and he drives pretty normally most of the time. The rebuilt trans has 30k on it.

We replaced the fluid but that didnt fix the issue. This ordeal has turned him off from hondas which I think is unfortunate. My civic was boosted for a year and I never had transmission problems with how hard I abused it. What could we check next? I was thinking engine mounts?
 

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BATSLOMAN GIVES NO FUCKS.
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Posting this for my buddy who keeps having trans issues. His original trans started grinding into 3rd about a year ago. He got a rebuilt trans from syncrotech and that trans was grinding too. Sent that back, got a replacement from syncrotech and all was good for the past year. Now its starting to grind/clunk again going from 2nd to third shifting normally. His motor is stock and he drives pretty normally most of the time. The rebuilt trans has 30k on it.

We replaced the fluid but that didnt fix the issue. This ordeal has turned him off from hondas which I think is unfortunate. My civic was boosted for a year and I never had transmission problems with how hard I abused it. What could we check next? I was thinking engine mounts?
since aqua is also a trans builder, maybe there is more to it than what OEM. maybe they've found fluid changed to be beneficial?
 

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At a bare minimum you should be changing the tranny fluid once a year.

2-3 times a year would be satisfactory on a stock car driven from point A to point B.
Double that if you drive pretty hard.

Transmission rebuilder or not, 7k is far too often for a street driven car with no fancy parts inside. Just feels like you would be spending more money on transmission fluid than an engine rebuild every year.

MY opinions. Opinions. MINE.
 

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Transmissions have no filter and no cooler. The trans fluid gets hotter than the engine oil. Transmissions are constantly shedding metal into the fluid.

I've tested nearly every fluid available and had it all analyzed, as well as varying mileage intervals analyzed. 7k is when it needs to be changed on a daily driver.

If you use the best motor oil option (which is also the cheapest, Supertech 10w-30) instead of a good fluid like Torco MTF, you're only spending about $5 every 7k miles. If you use Torco MTF and only order it two liters at a time, that comes to a whopping $0.0049/mile. A transmission rebuild cost about the same as an engine rebuild, and if you have a pre-96 transmission, many of the parts you need for said rebuild are no longer available.
 

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Makes some sense. I personally use a mix of oem fluid (yes even with its updates and thinner spec) and mobile 5000. Has changed a badly whining tranny into a very quiet one a few times for me.

I personally will not be recommending 7k intervals, but ONLY because I have personally experienced 200k mile transmissions that shifted perfect in every way that the seller stated only had its fluid changed MAYBE only every 2-3 years. and unknown of course about whoever initially bought new the car the tranny came out of.


Considering I am so heavy on the at least once a year change, I think I will be fine.

Again, all this is just my opinion.
 

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Ive seen people with 200-300k cars that didn't even know the tranny took fluid. Not saying its a good idea, but it happens.

Last time I tried to have someone change my tranny fluid like 12 years ago I asked to have it done at a lube shop and they thought I was crazy. They were like you have a MANUAL, you don't change fluid in a manual, only in an automatic.

So its easy to see how people get confused.
 

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Brokedick Millionaire
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Mileage/Usage dependent.

One SCCA customer replaced his fluid every other race weekend, $15 in Penn. Synchromesh while changing the engine oil.
 

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Far from it. They get to charge a premium to repair or replace transmissions and rear ends when they fail out of warranty.
 

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Take one of those 200k or even 100k transmissions that has never had a change and take it apart. You'll change your mind.
After hearing about you recommending 7k fluid changes, I would be scared to lol. Ive simply been very choosey and buying transmissions who had some sort of record of fluid changes.

I changed the tranny fluid in my '13 honda fit at 15k miles or so (bought with 1 mile on clock). Fluid was already pretty nasty. I decided it was due to being new and "break-in".

Seeing as I took that car to the dragstrip every friday they were open for nearly 2 years, I changed the fluid again at 35k miles or so, and fluid quality in appearance was not great. Had consistency proper to my knowledge, but coloring was pretty dark and it was smelly.

My wallet controls my ignorance level at times.

BUT

If I got a rebuilt tranny from you or bone,, your recommendations would be followed to the T. That much, I will admit.

yeah, Im jacked on on some of my preferences lol. Im foolish at times, I know.


The weird thing is, when Im in the market for transmissions, I avoid any who have had their fluid changed very recently, as its usually an owner trying to cover up something. BUT Im super picky, and will even let a potentially awesome deal get thrown away if no records or some sort of believable story.
 

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Brokedick Millionaire
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It is $4, the price of a kids meal, for two quarts of plain old oil....

Note: I haven't bought any oil in 4 years, was paying $10 for 5 liter jugs.
 

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I still think it's more motor mount-related than fluid. When I purchased my first Honda and started having the exact same issue, I DIY poly-filled my motor mounts and that fixed it right up.

Also check out the shifter bushing.
 
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