grinding only when shifting 4th to 5th

[JoHn E]

when I shift from 4th to 5th at 3000 rpm or higher i get this grind i feel thru my short shifter. but if im shifting from 4th to 5th at lower rpms i dont get it at all. it only happens from 4th to 5th. my clutch is all the way in and i am shifting the same way i do thru all of the other gears and its always if im at higher rpms. so ive been having to shift early to 5th to avoid this.

does anybody have an experiences similar to this?

[yarou]

syncro probably

[s14freak93901]

friend has the same from shifting from 1st to 2nd and yea, its his syncro.

[Blown240sx]

syncro its common

[bmx22]

can trans shops change sycros or re build sr trans in the usa

[murda-c]

if you get the parts any good transmission shop can do it.

getting the parts might be a problem unless they have them in common with a usdm tranny.

[dorkidori_s13]

get rid of your short shifter...those things are HORRIBLE on your transmission...i had one in my SR tranny for a long time...got to the point where it was grinding EVERY gear...took it out and put my stock shifter back in...all the grinds went away

but its a problem with ur gear sychros...they get old and worn out...outside of rebuilding your tranny...not a whole lot else can be done about it...but get rid of your short shifter before you try ANYTHING else

[Jimmy Up]

Old trick to try:

Line up the synchros- throw it 2nd gear at a stop, do it a few times and see if it works for you man

[GabeS14]

rebuilding the Trans isn't cheap..if you are gonna have a shop do it.
prob gonna charge 300 just for labor(minimum..)
if you get the parts they can rebuild it for you..but you wont be able to order through regular shops..
gl with that man.

[dorkidori_s13]

theres an old saying...

if u cant find it...grind it

[GabeS14]

theres an old saying...

if u cant find it...grind it

lol..ture....
but hey anyways..I just remember i have a buddy in Los Angeles who has a shop in his backyard...lol..he just did some work on an S15 tranny..I am sure he would be cheaper than going to a tranny shop!
lemme know if you wanna talk to him!

[whereda40at]

when I shift from 4th to 5th at 3000 rpm or higher i get this grind i feel thru my short shifter. but if im shifting from 4th to 5th at lower rpms i dont get it at all. it only happens from 4th to 5th. my clutch is all the way in and i am shifting the same way i do thru all of the other gears and its always if im at higher rpms. so ive been having to shift early to 5th to avoid this.

does anybody have an experiences similar to this?
i have an sr tranns that ill sell you that doesnt grind at all that i am selling. let me know.

[dorkidori_s13]

its just a gear synchro...its not the end of the world...the transmission isnt going to explode

try switching to a better gear oil (or CHANGE your gear oil if its never been done)...get rid of that disgusting short shift and if it still grinds a bit...oh well...not worth spending 300-400 bux just to fix a slight grind in the tranny

[JoHn E]

i bought the car with the short shifter already in :(

[240cracker]

mine does that from 2nd to 3rd...
just run it till it gets bad enough to replace.

like they said cant find it grind it

[DudeYourSoOOJDM]

Try bleeding ur clutch slave cylinder also.....

[LA_phantom_240]

Mine grinds from second to third when beating on the poor old KA, and sometimes second to third. I'm gonna change my gear oil when I change my motor (this weekend hopefully)... Last time I changed gear oil, I wanted to shit my pants it was so poor.... oh and I'm on the stock shifter, in all it's loose, jiggly glory.

[CrimsonRockett]

Royal Purple or Redline gear oil.

'Nuff said.

I had a grinding issue with my tranny going from 2nd to 3rd anywhere from 3,000 to 5,000 rpms.

Oh, my tranny mount was worn the fuck out too.

Ran royal purple and slapped on a new nismo mount...grinding is gone.

[tt99ol]

buy a sequential dog box
you will never have trouble getting it into gear again
but first try some good gear oil with shockproof additive in it
like redline hd gear oil

[slider2828]

I have a BM and used it for 3 years, never had a problem and goes in smooth all the time.... What was the problem with your short shifter? I need an engine torque dampner as it is hard to jump from 1st to 2nd when driving real hard.... but ima boosting 14 psi in top of 1st so eh...

[iitywygms]

its just a gear synchro...its not the end of the world...the transmission isnt going to explode

try switching to a better gear oil (or CHANGE your gear oil if its never been done)...get rid of that disgusting short shift and if it still grinds a bit...oh well...not worth spending 300-400 bux just to fix a slight grind in the tranny
How does a short shifter cause a transmission to grind?

[tastycakeman]

are synthetic tranny additives good on tranny seals? i used redline gl-4 oil but i also mixed in a bit of royal purple additive. grinds like a bitch into 2nd above 3000.

[DohcKA]

i hate short shifters... i love those throws... i guess its cause im use to my 86.. but yea try changing the gear oil it does help in some cases... makes it feel a lot nicer

[PhilthyS13]

I don't think you need to rebuild the transmission. Afaik, the ka and sr transmissions are the same thing - the only difference being the bellhousing, so you could easily find a ka tranny for cheap and swap it using your bellhousing. Much cheaper than a rebuild.

http://www.zilvia.net/f/showthread.php?t=119499

[wh0aitznic0]

I had a grind going from 2nd to 3rd since I bought the car last year. I changed the clutch 2 weeks ago and put new diff fluid and it went away. Even with my B&M shifter. Now how do I get rid of that short shifter rattle ?

[flip3d]

get a KA trans and swap the bellhousing. gears might be a little different but its cheaper than rebuilding or getting a new SR trans.

[slider2828]

You can't... I think you should have the 2nd version which rattles less already... Try not to lightly gas when you are at 1500 rpm or something... Its just your engine shaking, at least that is my experience. Also try a heavier weight shift knob... Might help too...
-Ken


I had a grind going from 2nd to 3rd since I bought the car last year. I changed the clutch 2 weeks ago and put new diff fluid and it went away. Even with my B&M shifter. Now how do I get rid of that short shifter rattle ?

[INeedNewTires]

i used the shit SPL uses, its NEO synthetic gear oil, worked wonders i highly reccomend it, ESPECIALLY if you've never changed the transmission oil. otherwise who cares a lil grind going to 5th isint a big deal, not like this is a new car dude, just drive it and enjoy it till it explodes, then get a new tranny. Their not more than $250 anyway much less than rebuilding yours. plus their all pretty much the same, SR, KA doesnt matter, swap bellhousings and it bolts up. 5th get is a bit longer on KA but not much.

[JoHn E]

i took my car to a shop and got my transmission oil changed just cus i dont know when the last time the previous owner changed it was. it still does that grind from 4 to 5 but i was wondering... if i try using the royalpurple or the redline oil am i gonna get a difference? the oil that the shop used was some dexton III oil

im thinking maybe it would be worth a try?

[Entry Speed]

I have the same problem when I go into second and third.

I swapped tranny's, installed an ACT street disc/pressure plate, filled it with new fluids, bled the shit out of it, adjusted the damn pedal and it still does it when its cold (a lot less than the previous trans though).

wtf lol

Its really frustrating, but I guess there is always a risk when installing another used trans.

[dorkidori_s13]

14 year old motors = BAD GEAR SYNCHROS IN TRANNY

lol...these conversations are funny...guys....240s are OLD cars...even SRs are OLD motors...bad gear synchros are a normal part of owning OLD motors...nissan trannys from the late 80s and 90s are NOTORIOUS for gear synchros going to hell

from what ive read about nissans newer trannys....especially the VQ tranny...nissan learned from its mistakes in the 90s and MAJORLY beefed up the gear synchros in their transmissions...PLUS...its a tranny that incorporates NEWER technology...SR/KA/CA trannys are all the same tranny that was developed in the mid to late 80s

[240drifter1]

Since we are the topics of tansmissions, when the tranny whines really bad would that be the throwout bearing ? Is it safe to drive like that ?

[dorkidori_s13]

Since we are the topics of tansmissions, when the tranny whines really bad would that be the throwout bearing ? Is it safe to drive like that ?


my truck has been doing it for years (i have a 87 nissan hardbody as a daily)...hasnt really ever caused a problem...u either need to replace it or lube the sucker up a bit

[240drifter1]

Like ill be going down the highway and some times its so loud it almost hurts your ears, its rediculous.
Then other times you can barley hear it, lmao.

[tt99ol]

i took my car to a shop and got my transmission oil changed just cus i dont know when the last time the previous owner changed it was. it still does that grind from 4 to 5 but i was wondering... if i try using the royalpurple or the redline oil am i gonna get a difference? the oil that the shop used was some dexton III oil

im thinking maybe it would be worth a try?

wow dexron III is atf
you need gear oil
its way thicker than atf
go back and sue the shop for ignorance
or better yet a tranny rebuild

[JoHn E]

wow dexron III is atf
you need gear oil
its way thicker than atf
go back and sue the shop for ignorance
or better yet a tranny rebuild


shit i want my money back

[Mangudai]

get rid of your short shifter...those things are HORRIBLE on your transmission...i had one in my SR tranny for a long time...got to the point where it was grinding EVERY gear...took it out and put my stock shifter back in...all the grinds went away

but its a problem with ur gear sychros...they get old and worn out...outside of rebuilding your tranny...not a whole lot else can be done about it...but get rid of your short shifter before you try ANYTHING else

No shit? Thats crazy..

[Forge_55b]

if your synchro is bad double clutch ie shift to neutral, let go of clutch and then apply clutch again, then shift. that is how the old manuals worked when synchros didn't exist yet

[turbo_dreams]

buy a sequential dog box
you will never have trouble getting it into gear again
but first try some good gear oil with shockproof additive in it
like redline hd gear oil


How much would a sequential dog box cost me?

[JoHn E]

how serious is it right now that they put in DEXRON (ATF?) fluid in my car... should i hold off on driving it until i can find a shop that will put in royal purple gear oil

[240drifter1]

How much would a sequential dog box cost me?


More then you can afford, pal.

[dorkidori_s13]

how serious is it right now that they put in DEXRON (ATF?) fluid in my car... should i hold off on driving it until i can find a shop that will put in royal purple gear oil

if they put ATF in your manual tranny...you shouldnt drive the car at all PERIOD...ATF isnt meant to go in a manual tranny...its a totally different make up than gear oil is

i would recommend you immediately drain your tranny and fill it up with gear oil...drive it around for about 20 min...drain it again to make sure you get ALL the ATF out of it...then fill it back up with either redline gear oil or royal purple

[JoHn E]

thanks for the help guys

im gonna get the dexron drained out and get gear oil in

what are my other options besides redline and royal purple. which ones better. i wanna put in whatevers the best haha

[Jza]

I have the same problem when I go into second and third.

I swapped tranny's, installed an ACT street disc/pressure plate, filled it with new fluids, bled the shit out of it, adjusted the damn pedal and it still does it when its cold (a lot less than the previous trans though).

wtf lol

Its really frustrating, but I guess there is always a risk when installing another used trans.

I swapped a used tranny and I have exactly the same problem shifting from 2nd to 3rd! It happens once a while on 1st gear as well. I also have the short shifter from previous owner. I replaced it with a used OEM one and the grind noises are much less as well. I was told that is a C's Speed shifter (but, I really can't tell).

My machanic notice that there is sign of moisture in the system. He advice me to pump the clutch pedal 15-20 times before driving. See if it grinds. If not, most likely that is caused by the moisture. On my case, that helps ALOT!

But, I wonder why many people has the same problem on 2nd to 3rd?

Note: Read your manual! You can ONLY use GL-4 fluid!!! The GL5 has additives that will eat up some metals(bronze ?) in our tranny. Try to use Royal Purple which is GL-4! I believe the RedLine is GL-5 if I am not mistaken.

[blacktrash]

what do you need to slam it into 5th for anyway. just shift it slow and easy. you cant redline 4th any way unless your speed limiter is removed. i wouldnt spend money to fix that unless it was a lower gear.
but i would try the fush then GOOD gear lube.

[jilo]

actually people DO put atf in manual transmissions. just not all of it. people with subaru's know they have really tight or hard to shift trannys and they make a mixture of gear oil, engine oil and atf iirc. it helps a shit load for synchro's or hard to shift transmissions. look on nasioc and you can read about it.

but it would be easy to rebuild. yourself. get a fsm and find a shop in the area the has a press. or find a machine shop. then take the tranny off and pull the bell housing off, then lay the tranny on its side. there are either 14mm or 18mm bolts holding the tranny casings together. split the case and then remove the gearshaft that has 5th on it and buy new synchro's and install them. you can rebuild a manual for pretty cheap if you can find someone willing to press the gears on and off for you.

[JoHn E]

i called the dealer just to make sure of the oil to use and they said 80W90. Does this sound right? I got the 240 and the guy i got it from didnt give me an owners manual so i dont know for sure which weight to use.

should i just trust the dealer to do it instead of going back to that shop that put in the DEXRON ATF stuff in my manual?

what kind of gear oil would the dealer be using? I still kinda wanna get the royal purple/redline stuff but how would the factory nissan gear oil that the dealer would use compare to rp/redline?

[dorkidori_s13]

gear oil and regular oil are more of a dependance on where you live and the ambient air temperatures outside

in vegas...because of the heat here...on a temp to viscosity scale...it is recommended that nothing less than 10w-40 oil be used in ANY motor during the summertime...personally i perfer to use a thicker gear oil as well (i use the 80w/140 synthetic gear oil in my tranny and diff from RedLine)...id suggest you find a temp to viscosity oil chart and start learning about whats best to run in your motor at different times of the year...running different weight oils and gear oils will have a huge impact on the normal running temp of your motor and also the operations of your motor in extreme cold or extreme heat

the dealership will tell you bullshit...MOST dealers you call will tell you to run 5w-30 or 10w-30...thats the most common oil used now-a-days in your average consumer cars...the KA/SR/CA were all engineered to run on 10w-40 as their BASE oil weight...but like i said...go do some research thru google (or thru the wonderful search tool on zilvia) as you will find that most dealerships have no idea what the hell theyre talking about at times

[dmragecm]

How much would a sequential dog box cost me?

alot ive seen anywhere from 8-10k. not really worth it in my opinion. but as the op stated, im havin the same problem. im considering jsut gettin another tranny and crossin my fingers that its in decent shape. either that or shellin out an extra 1800 or so(not sure) for an oem sr tranny from rhdjapan. or just rebuilding the tranny.

[Jza]

i called the dealer just to make sure of the oil to use and they said 80W90. Does this sound right? I got the 240 and the guy i got it from didnt give me an owners manual so i dont know for sure which weight to use.

should i just trust the dealer to do it instead of going back to that shop that put in the DEXRON ATF stuff in my manual?

what kind of gear oil would the dealer be using? I still kinda wanna get the royal purple/redline stuff but how would the factory nissan gear oil that the dealer would use compare to rp/redline?

If I recall correctly, it should be 75 W 90.

[JoHn E]

i think i figured out a temporary solution for this shit


when i shift from 4th to 5th... and im kicking the clutch in, before going to 5th and after leaving 4th... i shake the stick left and right in neutral real quick (with the clutch still in),

then it doesnt grind when i move it into 5thafter all that


i guess for now ill just stick with doing this

[mchkc240]

My 2nd gear grinds too. It's not worth the money to fix it IMO. Oh well... Grind it up!

[JoHn E]

now theres a clunk from somewhere under the car as i switch from 1st to 2nd when im releasing the gas and pushing in the clutch. it only does it from 1st to 2nd

im trying to figure out whether its from releasing the gas or from pushing in the clutch