Jump to content
SAU Community

Recommended Posts

How does one know that the gearbox is nearing or at the end of its service life? What are tell take signs?

i) The car will give a slight jolt when changing gear?

ii) Sometimes a gear is "hold" for a good few seconds before engaging a higher gear (noticed RPM is also higher when this happens)?

These are the symptoms that I experience with my A31 currently. Your thoughts and experience will be greatly appreciated.

Almost missed out the most important information. I'm driving a 1991 A31 Auto transmission, with a RB20DET swap.

Thanks.

CT.

Link to comment
https://www.sau.com.au/forums/topic/131903-gearbox-problem/
Share on other sites

Thanks Simon. Your input is much appreciated.

To add on to the symptoms that I had, here's the latest... this morning when I arrived at the office, and while trying to park the car, I put the transmission at "R"... press the accelerator.. and the car didn't move!

I suspect I need to replace the torque converter. Any thoughts?? Is there a doctor (mechanic) in the house??

CT.

Link to comment
https://www.sau.com.au/forums/topic/131903-gearbox-problem/#findComment-2455983
Share on other sites

  • 2 weeks later...
Thanks Simon. Your input is much appreciated.

To add on to the symptoms that I had, here's the latest... this morning when I arrived at the office, and while trying to park the car, I put the transmission at "R"... press the accelerator.. and the car didn't move!

I suspect I need to replace the torque converter. Any thoughts?? Is there a doctor (mechanic) in the house??

CT.

Dont want to sound cruel but have you checked your fluid levels. Auto gearboxes play up heaps when they are down on fluid... Most importantly though get a service done, they will change fluid etc. Most problems you explain would be fixed by service..

Link to comment
https://www.sau.com.au/forums/topic/131903-gearbox-problem/#findComment-2478716
Share on other sites

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 everyone, I've been wrestling with this for a while now and have been trying to find out the cause. For context, the turbos used are Garrett 2860 -5s, the BOV is a BNR32 HKS SSQV IV kit, the car is currently tuned to ~470 whp on 17.5 psi. The car drives normally, pulls well when it doesn't happen, and I can replicate it fairly easily. It does not sound like turbo shuffle or flutter. The engine has only a thousand or so miles and has had this behavior since it was completed. After my engine was built for my R32 GTR, I noticed that the car now sometimes makes an air discharge sound on what appears to be positive boost pressure that sounds really similar to a BOV. I had thought that it was a BOV issue but even when replacing it with a brand new unit, the sound persisted. It seems like it's coming from the passenger side but I may be mistaken. The closest scenario I could find was this post here https://www.gtr.co.uk/threads/maybe-a-boost-leak-opinions.147955/https://www.gtr.co.uk/threads/maybe-a-boost-leak-opinions.147955/ started by @yakshii and it sounds very similar. As in, at partial throttle once I reach positive boost I begin to hear the same psh psh psh psh psh sound like air is leaking somewhere when I keep the throttle in the same position. It most commonly happens in 4th gear at around 3-3.5k RPM and 5th gear around 2.5-3k RPM, which seems to coincide with normal positive boost thresholds. It might be similar to what @Austrian GTR mentioned about his own HKS SSQV. Notable difference would be that when he applies more throttle when it happens, it stops. In my scenario if I apply more throttle during this repeated psh psh psh sound, the cadence of the sound gets faster and louder rather than stopping. If I lift off slightly and apply throttle again, it will normally stop and pull without issue. I've checked all rubber couplers to ensure that they are tight, but have not gotten the opportunity to properly do a pressurized boost leak test. If anyone has had similar experiences or thoughts on what might be the cause, I'd be very keen to hear them. I also have a video of it happening from inside the cabin, if that would make it easier to understand: https://youtu.be/2zqZXcx8jbA
    • I'd want at least $40K for mine, but thats easy to say cos I'm not selling anyway.
    • That's incorrect. We have 4 seasons, consisting of pre winter, winter, post winter and a small glimpse of hope! 
    • I spotted a black C34 in Mittagong this morning!
×
×
  • Create New...