Jump to content
SAU Community

Recommended Posts

I am trying to find out wats wrong with my transmission. its an rb20 enging, box, and a brass button clutch

the problem just started last week and it getting worse and worse.

you cant actually feel the problem but you can sure as hell hear it.

you can only hear it when the clutch is out.

mostly when driving but even sometimes in neutral at idle, it sounds almost the same as the noise from a whining diff but lower pitched and it seems to sort of phase in and out like a whoosh whoosh whoosh and it is relative to how fast i am going.

is it my gearbox or clutch? and is it likely to die suddenly or have i got a couple of weeks to fix it?

any help appreciated

Link to comment
https://www.sau.com.au/forums/topic/59905-gearbox-or-clutch/
Share on other sites

Guest two.06l
I am trying to find out wats wrong with my transmission. its an rb20 enging, box, and a brass button clutch

the problem just started last week and it getting worse and worse.

you cant actually feel the problem but you can sure as hell hear it.

you can only hear it when the clutch is out.

mostly when driving but even sometimes in neutral at idle, it sounds almost the same as the noise from a whining diff but lower pitched and it seems to sort of phase in and out like a whoosh whoosh whoosh and it is relative to how fast i am going.

is it my gearbox or clutch? and is it likely to die suddenly or have i got a couple of weeks to fix it?

any help appreciated

probably only a thrust bearing noise. Twenty bucks for a new one but $200 to get it fitted.

Mate, i'll tell you what, same deal happened to me. this is how you determine which is what. If its the thrust, with your clutch only half engaged it'll go away.. if its the gearbox do this, turn all ur music etc etc off... then drive the car, place it in first take off and go to about 40kmph and roll.. push your clutch in, and if the noise is still there its the box, if its gone... its the clutch.

to easy!

if you can DIY it only costs a few bux (maybe 100-200$) to rebuild the box and replace all the bearings etc, takes a weekend to do it, all the right tools.. and a mate to help you aswell!!!

Hope all goes well!

Dayne

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Hi,  Just joined the forum so I could share my "fix" of this problem. Might be of use to someone. Had the same hunting at idle issue on my V36 with VQ35HR engine after swapping the engine because the original one got overheated.  While changing the engine I made the mistake of cleaning the throttle bodies and tried all the tricks i could find to do a throttle relearn with no luck. Gave in and took it to a shop and they couldn't sort it. Then took it to my local Nissan dealership and they couldn't get it to idle properly. They said I'd need to replace the throttle bodies and the ecu probably costing more than the car is worth. So I had the idea of replacing the carbon I cleaned out with a thin layer of super glue and it's back to normal idle now. Bit rough but saved the car from the wreckers 🤣
    • After my last update, I went ahead with cleaning and restoring the entire fuel system. This included removing the tank and cleaning it with the Beyond Balistics solution, power washing it multiple times, drying it thoroughly, rinsing with IPA, drying again with heat gun and compressed air. Also, cleaning out the lines, fuel rail, and replacing the fuel pump with an OEM-style one. During the cleaning process, I replaced several hoses - including the breather hose on the fuel tank, which turned out to be the cause of the earlier fuel leak. This is what the old fuel filter looked like: Fuel tank before cleaning: Dirty Fuel Tank.mp4   Fuel tank after cleaning (some staining remains): Clean Fuel Tank.mp4 Both the OEM 270cc and new DeatschWerks 550cc injectors were cleaned professionally by a shop. Before reassembling everything, I tested the fuel flow by running the pump output into a container at the fuel filter location - flow looked good. I then fitted the new fuel filter and reassembled the rest of the system. Fuel Flow Test.mp4 Test 1 - 550cc injectors Ran the new fuel pump with its supplied diagonal strainer (different from OEM’s flat strainer) and my 550cc injectors using the same resized-injector map I had successfully used before. At first, it idled roughly and stalled when I applied throttle. Checked the spark plugs and found that they were fouled with carbon (likely from the earlier overly rich running when the injectors were clogged). After cleaning the plugs, the car started fine. However, it would only idle for 30–60 seconds before stalling, and while driving it would feel like a “fuel cut” after a few seconds - though it wouldn’t fully stall. Test 2 – Strainer swap Suspecting the diagonal strainer might not be reaching the tank bottom, I swapped it for the original flat strainer and filled the tank with ~45L of fuel. The issue persisted exactly the same. Test 3 – OEM injectors To eliminate tuning variables, I reinstalled the OEM 270cc injectors and reverted to the original map. Cleaned the spark plugs again just in-case. The stalling and “fuel cut” still remained.   At this stage, I suspect an intermittent power or connection fault at the fuel pump hanger, caused during the cleaning process. This has led me to look into getting Frenchy’s fuel hanger and replacing the unit entirely. TL;DR: Cleaned and restored the fuel system (tank, lines, rail, pump). Tested 550cc injectors with the same resized-injector map as before, but the car stalls at idle and experiences what feels like “fuel cut” after a few seconds of driving. Swapped back to OEM injectors with original map to rule out tuning, but the issue persists. Now suspecting an intermittent power or connection fault at the fuel pump hanger, possibly cause by the cleaning process.  
    • For race cars, this is one part where I find having the roll cage bar having gone through a hole in the floor better than the build it up on a ledge inside... The Merc I help on, the main hoop ends are marked on the car, and the jack is marked... Jack goes under a few inches and lifts one whole side of the car up... Removes that fight for long slim jacks for race car duties!   My biggest issue for the daily drivers I work on, is my jacks don't go high enough. The jacks start out on a few blocks, jack it up, then start a second jack under it on more blocks, and then I can get an axle stand under it. My axle stands are presently in use, and are nearly fully extended. The car is sitting with barely more than a cm of clearance to get the wheel off the studs! Sarah's Kluger is the same, as it has an ungodly amount of droop available in the suspension and a distinct lack of good jacking points!
    • Happy? Yep, my to do list is getting shorter and shorter. Either this light approaching is the end of the tunnel, or I'm about to be hit by a train... Ha ha ha   Also, Duncan isn't that far out of town that you need to make a multi day drive out of it. 😛
×
×
  • Create New...