Immortalities totally random thread

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Re: Immortalities totally random thread

Postby Tazzi » Tue Apr 28, 2020 7:14 pm

immortality wrote:How do we adjust the dash speedo? I emailed Tazzi but I haven't heard back yet.

Got it all back together today, fitted some new exhaust gaskets as the originals after the cats were rubbish. I used 80w-90 mineral gear oil but the gears are a bit noisy and more noticeable when hot. I'll get some 80w-140 synthetic to try tomorrow.


Just getting around to everyones emails now as Iv just clocked off for the day.

Expect a message back shortly :thumbup:
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Re: Immortalities totally random thread

Postby immortality » Tue Apr 28, 2020 7:19 pm

Cheers.

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Re: Immortalities totally random thread

Postby Gampy » Wed Apr 29, 2020 12:30 am

What kind of oil should I use for my Detroit Truetrac?.

One of the most impressive things I found about them that many will never experience is how they are on ice, you can still steer!
Not so with the Detroit Locker, A Locker will drive you straight and forces you to steer with the ass end. (ie sliding (getting the inside tire to slip))
I'm not angry, I'm a blatant, driven, passionate individual that is extremely intense!

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Re: Immortalities totally random thread

Postby immortality » Sun May 10, 2020 10:54 am

SO I got the diff back in the car but struggling with gear noise. First few laps around the block is was awesome but then as it warmed up the noise gets louder. I think it's gear noise so I took the diff out and adjusted the backlash, increased it a bit and put it back in. First time the noise was worst over overrun. Now it worst when just cruising. hit the gas and it goes away mostly. Definitely accelerating better and traction is a real bonus. This is what the gear pattern looked like this time around.
WhatsApp Image 2020-05-10 at 12.24.32.jpeg

WhatsApp Image 2020-05-10 at 12.24.33.jpeg


My only thought is maybe the pinion a touch to deep?

Using 80w-90 mineral oil as recommended by Motive Gears and Eaton Truetrac.

Also, A big thanks to Tazzi. Got a copy of his Body Diagnostics software to change the dash cluster.

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Re: Immortalities totally random thread

Postby vlad01 » Sun May 10, 2020 11:04 am

I would check the pinion bearing pre-load. I had one destroy itself within a few Km. Did the same, was quiet and got nosier and noisier after about 1-2km
I'm the director of VSH (Vlad's Spec Holden), because HSV were doing it ass about.

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Re: Immortalities totally random thread

Postby immortality » Sun May 10, 2020 11:12 am

Yeah, that was my first though first time around. I reset the pre-load and I'm sure its within spec. I used the old string and weight scale method to check. They recommend 1.4 to 2.4Nm with new bearings and seal and we were right at about 2Nm.

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Re: Immortalities totally random thread

Postby immortality » Sun May 10, 2020 11:14 am

Also, does anybody have any idea what the normal operating temps for these diffs are?

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Re: Immortalities totally random thread

Postby immortality » Sun May 10, 2020 12:15 pm

I think I'm gonna pull it out again. Just went around the block and I'm not happy with that noise. Getting good at pulling diffs....

Good thing I'm still at home from work (no work) and the missus is working from home again this week.

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Re: Immortalities totally random thread

Postby immortality » Thu May 14, 2020 2:03 pm

Pulled the diff out and checked/stripped it down.

What we found, Backlash had increased 0.02mm and the pinion pre-load was slightly lower but still within spec.

Tomorrow we will clean and re-assemble. Will also double check the carrier bearing pre-load again. Otherwise I can't really see any reason for noise other than the gear set?

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Re: Immortalities totally random thread

Postby immortality » Mon May 18, 2020 2:26 pm

Diff is back in. Less pre-load on the bearings. Back lash and wear pattern look good but the diff is still noisy so I can only put it down to the gears :( Recalibrated the dash this arvo using Envyous customs software. Was definitely the easiest part of this whole gear swap saga. Literally 2 minutes and the job was done. Thanks Tazzi for the software.

Motive Gears recommend a 500mile break in period doing short drives to heat cycle the gear set. The crown wheel did show some interesting heat markings so I think I'm going to try that and see if the noise changes, hopefully the bitch will wear itself in and quieten down.

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