Transmission Whining Noise?

[KYZAAC]

i started a complete build/sr swap 2 years ago, over the past year i havent been doing much except when i had free time. i had a ton of problems with the motor, but finally got it running. now i have this strange whining noise coming from the transmission. i can only hear the noise when the clutch peddle is released, when the clutch is too the floor it goes away, it has slight grind when pulling away as well.. The clutch & throw out bearing are brand new.

After having one problem after the next and getting frustrated, i stepped away from the whole project for a few months. i recently pulled the whole motor out and have the transmission off. i watched a video on youtube of the Identical noise that is coming from my transmission.

This is how he fixed the problem (this is in the discription of that video)
"TOB makes an awful noise at idle, disengage the clutch and it goes away.

The noise WAS the TOB rattling on the fork. The trans was dropped, the TOB was greased where it rides on the fork and reinstalled; the noise is no longer. I failed to grease the fork prior to installation."

does this make sense for a sr transmission? would i have to grease the TOB or the sleeve? or could it be something completly different? i'd hate to put the motor back in and have the same problem. I need Help!! Please!!

Here is the video. Thanks
[youtube]http://www.youtube.com/watch?v=YWlK3sVXPyk[/youtube]

[94_240sx]

There's a rubber boot where the fork goes. I wonder if you can use a coat hanger or a stick to put grease on through that hole. Mine whines a little bit, but not that bad at all.

[KYZAAC]

i actually have the motor and transmission out of the car already, im wondering where the grease would have to go? on the back of the TOB, or on the sleeve clip that connects to the fork. hopefully its something this simply. i honestly can't really see it fixing the issue.

did anyone have this problem and know the correct fix?

[SketchyRollin564]

sounds like a throw out bearing if it goes away when the clutch is realeased


grease should go on the shaft the TOB slides on, not sure if it would need to to anywhere else.

not to thread jack but its kinda related. i just swapped my trans and im hearing a lot of TOB noise ( i re used the old one, but it was never that noisey). In 5th and only 5th, and only if im on the throttle, i hear this wierd high pitched buzzing noise (not gear whine). Its hard for me to tell if its TOB noise, because without pushing in on the clutch pedal, the noise stops if i simply just let off the gas, and resumes when i get back on it... only does it in 5th gear

im gonna be pulling the transmission some time soon to see whats up

[KYZAAC]

i greased the shaft and the fork, and anywhere else the manual says too, but i did clean the TOB with brake cleaner to remove any grease, i didnt think it should have grease on the bearing. it doesnt really make sense to me, but what do i know...

the TOB bearing that came with my new clutch was different then the one i removed. ppl online said it would work, but i didnt want to take any chances so i ordered one from nissan, and they sent me the same style that came with the clutch. my friends buddy is a mechanic at nissan and i had him take a look at the bearing and he said it would work without any problems. i hope its not that.

no idea what your problem could be man, a quick google search said something about synchro's making a buzzing noise, i really have no clue tho, sorry

[KYZAAC]

i was doing some reading and it seems the input shaft bearing can cause this same noise. should the shaft have any play? mine has some wiggle room, in all directions, up/down/ , side/side, and in/out

could it be a busted bearing, and is that a big job? i never done any major work to a transmission before.

[jonj0nn]

Any luck with this? I just swapped in a transmission Sunday and since first start up my car has been making the same exact sound. The throwout bearing and pilot bushing was replaced as well. I checked the fluid level and was filled to spill so thats good. Also bled the clutch just to knock out the easier options first. Any ideas? I also heard it could be the input shaft bearing. When I checked mine before I threw in the transmission, it did move a little in each direction. Would think some play would be ok because the pilot will hold it in place...

[KYZAAC]

pretty sure its the input shaft bearing. mine had a ton of play, my buddy has his transmission off his evo the same and his was tight as hell. thats the only thing i could see wrong, TOB is good. i put the motor back in and its still making the same noise. i ordered the bearing, should be here tuesday.

[jonj0nn]

I'm thinking that as well :/ When I spun mine it sounded a lil funny but figured it was cause the transmission did have fluid in it for awhile. You ordered the pilot bearing? Throw out Bearing? Or the input shaft bearing? How hard is it to change input shaft bearing?

[KYZAAC]

input shaft bearing. mine had a noise when i spun it as well. and i didnt think the play was too bad at first, until i checked my buddies. then it seemed more a wobble then a wiggle.
i've never changed one so i have no idea how hard it is.
i'll try to put everything back the way it comes out and it should be good to go lol

[jonj0nn]

Did you purchase the bearing from Nissan and where did you find the part number?

[KYZAAC]

i just ordered the one from the ka transmission, someone posted on a forum they were identical, it cross references to an sr20de along with a ton of others.

you can find the part numbers and cross reference here -- http://nissan4u.com/parts/
transmission page (click on part number to cross reference)-- http://nissan4u.com/parts/240sx/us_s13/ ... tration_2/

here you can check the prices out -- http://www.trademotion.com/parts/?actio ... ke=&model=

[KYZAAC]

does anyone know if any special tools are needed to remove? i have a shop press, i hope thats all i need to pop the bearing out

[jonj0nn]

Any luck with this? I think you need a puller but it sounded like a normal pulley puller would work.

[KYZAAC]

i just picked up the bearing today actually, it was hard to find, no one had it besides nissan, and they called me back and said they found one in toronto. it came to $140 for the bearing alone, no other parts or seals came with it.

is there any seals that go over the main bearing that need to be replaced with the bearing? or am i missing anything?
i dont usually do it like this, i'd like to have everything apart order what i need and put it back together.

im hoping to drop the transmission tomorrow.and have it back in the car same day or day after.i dont think my friends hoist is available tho so it'll it my garage.
just want to make sure the bearing is all the "NEED"

thanks

[KYZAAC]

Any luck with this? I think you need a puller but it sounded like a normal pulley puller would work.

i finally got around to pulling the transmission 2 days ago, taking the case off and removing the gear assembly was pretty easy, we basically had to tear the whole assembly down to get at the main bearing, only used a puller once, we pretty much used a shop press for everything, took some creativity but it got the job done

it was my first time doing transmission work, it was pretty intimidating at first, but once you understand how everything works its actually not even bad, everything pressed out/on nice and smooth, just make sure you remember how everything comes apart.

if your doing this, i'd recommend replacing a few other bearings and seals while your at it, its a bit of work to change 1 bearing, im pretty broke so i just changed the main bearing and put it back together. i have the gear assembly ready to go back in the case. previously i couldnt find a rebuild kit for an sr20det transmission and just ordered the single bearing from nissan for $140. i was looking around lastnight and found a part number FS5W71C. when i searched that number there are tons of kits for dirt cheap. so i ordered the whole kit, with all 5 bearings, seals and gaskets for $52.99, you can get kits with new synchros and and locknuts for $100. i'd way rather do this now then have to do all this work down the road when another bearing goes bad.
http://cobratransmission.com/index.php? ... rd=FS5W71C+

heres a few pics i snapped

gear assembly

input shaft bearing




never had a bearing separator so i just wrapped the chain grips around and popped it off lol

38mm crows foot type wrench i made up to torque to the mainshaft nut

[krash]

Moved to 240sx tech.

Good work man! I have to do this to my KA trans one day. I'm sure the trans feels a lot better now

[KYZAAC]

ok is this transmission suppose to make that noise? after a full rebuild, everything is new and i still got that god damn noise.

[voiddweller]

ok is this transmission suppose to make that noise? after a full rebuild, everything is new and i still got that god damn noise.

Did you ever fix the problem?

I know this is an old thread but I wanted to post because my car has been making this exact same sound since day one of my motor swap over 8 years ago.

Everything was replaced during my swap. New OEM TB, brass pilot bearing (might do needle next time,) JWT clutch, flywheel, pressure plate and used high temp grease on everything except the fork.

It's an annoying sound, but there's no vibration from the pedal, so I'm just dealing with it. It never occurred to me that it could be vibration on the fork, so I was all ready to buy new bearings and pull the gear box apart, just like KYZAAC.

Now that I found this post, I know the items that don't fix the problem. When it's time to replace the clutch, I can use this a great starting point if KYZAAC doesn't post back.

Thank you!!!