blazzer

So i have an s80 transmission from ausdm gsr integra.

rebuilt the transmission about 10,000k ago.

everything was fine until last week i had noticed 2nd gear is clunking, and it is quite loud.
if i double clutch or shift in to gear very slowly it seems to avoid the clunking.

or if i shift fast from 1-st to 2nd i move the shifter it self while shifting down slightly to the right a bit the clunk seems to be avoided.

when i did the the rebuild i bought a kit from syncrotech. with their carbon syncro's, new sleeves bearings etc.

just today i had switch out the transmission fluid, i was running gm friction modified syncromesh, and i have swapped over to honda MTF.

i dont know if this is a placebo or not but the clunking more or less seem's to be random now. sometimes it is smooth, sometimes it clunks but when shifting from 1-2.

every other gear is fine. i am a little lost to what exactly this problem could be.
I have inspected the shift linkage and slave cylinder and clutch line. no leakage that i can see, no odd bends that i can see in the shift linkage.

could a faulty shifter cause this? i am not really sure what else to consider... help would be great

blazzer

anyone?

slowcivic2k

Start with the exhaust, shifter, linkage, and its mounting points. Also check the engine mounts for excessive deflection. And of course, loose components in the engine compartment.


A defective or damaged shift piece internal to the transmission is likely, given none of the above are the cause.

blazzer

from and internal transmission point of view, are bad sleeves more to be the cause of loud clunking compared to syncro's? and if so... how in the world would sleeves go bad suddenly, i have never had an issue like this. im just a little lost as to why it is only 2nd gear doing this. and only when shifting from 1-2. shifting 3-2 there is no clunk no matter how hard, soft, fast, or slow i shift.

im going to get everything up again and re check everything in case i missed something, but i am really quite confused....

slowcivic2k

Start with the exhaust, shifter, linkage, and its mounting points. Also check the engine mounts for excessive deflection. And of course, loose components in the engine compartment.


A defective or damaged shift piece internal to the transmission is likely, given none of the above are the cause.

blazzer

still does not answer my question.

but i rechecked everything, aside from a butt load rust on the stabilizer bar nothing looks damaged there. one thing i did check was movement of the linkage in gear which i did not think of before. in all gears there is quite a bit of movement on the linkage.

if this is linkage, shifter or a combination of things i do not know yet because i do not fully understand, this my asking for help.
the linkage where it connects to the pin on the transmission is somewhat rusted but intact and when shifting, "visually" looks ok could the linkage play be coming from here and causing this clunk?
if so why?
this makes no sense to me because if it was why is no other gear affected?

all engine tranny mounts look good, no breakage or tears, torque mounts look ok.

exhaust is fine, no interference with linkage or stabilizer and no contact on engine or that would cause from what i can see a tranny problem.

so back to what i said

"from and internal transmission point of view, are bad sleeves more to be the cause of loud clunking compared to syncro's? and if so... how in the world would sleeves go bad suddenly, i have never had an issue like this. im just a little lost as to why it is only 2nd gear doing this. and only when shifting from 1-2. shifting 3-2 there is no clunk no matter how hard, soft, fast, or slow i shift.

im going to get everything up again and re check everything in case i missed something, but i am really quite confused...."

slowcivic2k

Can you feel the clunk in the shifter when it occurs?

Does the car produce a clunk when you place the car into gear without the car moving?

While stopped, attempt a fast second gear take off and see if the clunk is still there. Not 1-2, just straight to two. You don't need to burn out to do this.

You will need to remove it and disassemble and inspect the shift piece, and all other components for wear or damage. Since you have "eliminated" everything external that would cause a problem.

blazzer

yea, the feel is def, in the shifter. my test drive i tried to replicate specifically from the clutch with no luck every time it is replicated i can it coming from in front of me ( around the transmission area) and i can feel it in the shifter

not as loud, about the same sound as when engaging reverse.

i will go attempt this and report back

by shift piece do you mean the shift change holder assembly inside the transmission? or do you mean the actual shifter itself/shift linkage? sry, just dont understand exactly what you mean.

slowcivic2k

Honda calls the shift change mechanism a "shift piece" in the parts diagram, so that is what I refer to it as. I apologize for the confusion. That is what the defective part is looking like. I've seen this a few times in transmissions that have had really rough lives.

blazzer

Well looks like I'll be ripping apart the transmission I ordered a new stabilizer bar shifter and shift linkage just to keep everything tight I'll post up what the issue is once I get the tranny ripped apart