[Blobby]

I’m wondering why the SMEs never chime in about anything. I occasionally run accross an article written by one, but it’s always diluted.

For example:
-The A8 issue- is the torque converter faulty? Someone knows, but I haven’t seen a definitive comment about it.
-Adding led reverse bulbs. What is the proper in-parallel resistance to eliminate the glow when off problem?



I have two theories and I reckon both may be true to an extent.

1: anyone who is in a position to have anything related to a meaningful answer to any possible question is under an NDA.

2: All the design is so dispersed that no single person really knows.
Example:
-The torque converter manufacturer makes a TC according to the spec provided. They have no idea what car it’s for or maybe even what manufacturer.
-The circuit board designer may not even know the light in question is for automotive purposes. He just knows that when the switch is off, the light needs to be off.

[UnknownJinX]

I can't answer the A8 issue, but the LED one doesn't really have much of a definitive answer because every bulb is different. Some will require higher resistance than others for the "ghost glow" to stop.

I think the kit Gen5DIY sells isn't even made of resistors.

[FlukeSS]

A8 torque converter is not faulty. The Trans fluid used in the A8 is faulty. It has the wrong viscosity for the transmission. But if you leave the Trans Shudder go too long it will damage the torque converter.

Here is the link by the way: https://www.camaro6.com/forums/showt...ission+shudder

[Blobby]

Originally Posted by FlukeSS

A8 torque converter is not faulty. The Trans fluid used in the A8 is faulty. It has the wrong viscosity for the transmission. But if you leave the Trans Shudder go too long it will damage the torque converter.

Here is the link by the way: https://www.camaro6.com/forums/showt...ission+shudder

Ah I think I read that one. I need to peruse that section of the forum more. The question I’m asking on this thread is not those specific questions. It’s why no SMEs seem to be lurking in an unofficial capacity. That response doesn’t count as it’s an official statement.

[ctrlz]

Originally Posted by FlukeSS

The Trans fluid used in the A8 is faulty. It has the wrong viscosity for the transmission.

Fluid was hygroscopic, meaning it retained water. This caused uneven wear during clutchpack engagement. At a microscopic level some of the surfaces were separated by water instead of lubricant. Even a small amount of this can quickly lead to accelerated wear. Once you have a rough surface it just gets rougher even if you change the fluid.
So, the strategy for the A8 is change the fluid early, before you enter the inescapable downward spiral.

Occasionally company reps will peruse in an unofficial capacity. Years ago I moderated saabcentral and some people who helped design systems on the 93 were on that forum, but always in an incognito capacity. For whatever reason if they got caught posting, it could mean their job.
I think part of the reason is NDA's, but also that the type of sharing we do here could easily be seen as siphoning business from authorized factory service facilities. And service is the backbone of profit for automakers.

[LT1gen6]

Originally Posted by Blobby

. . The question I’m asking on this thread is not those specific questions. It’s why no SMEs seem to be lurking in an unofficial capacity. .

They're likely not here because they busy making money in their official capacities, and otherwise bound by non-disclosure agreements.

[FarmerFran]

Originally Posted by Blobby

I’m wondering why the SMEs never chime in about anything. I occasionally run accross an article written by one, but it’s always diluted.

For example:
-The A8 issue- is the torque converter faulty? Someone knows, but I haven’t seen a definitive comment about it.
-Adding led reverse bulbs. What is the proper in-parallel resistance to eliminate the glow when off problem?



I have two theories and I reckon both may be true to an extent.

1: anyone who is in a position to have anything related to a meaningful answer to any possible question is under an NDA.

2: All the design is so dispersed that no single person really knows.
Example:
-The torque converter manufacturer makes a TC according to the spec provided. They have no idea what car it’s for or maybe even what manufacturer.
-The circuit board designer may not even know the light in question is for automotive purposes. He just knows that when the switch is off, the light needs to be off.

The glow is an easy fix, put a pot inline, adjust until desired result, measure.


<---electronics sme

[mRahmani]

Because we can’t. I worked for an OEM a few years ago and one of things I worked on was an issue that would cause an engine rattle at startup. One customer was very unhappy about it and made a bunch of YouTube videos about the issue. I used those videos to convince management that we needed to solve the issue, and the fix went in for 2020, but communicating it to that customer could very likely have gotten me fired.

We’re listening, we just can’t always answer.

[Martinjlm]

Originally Posted by mRahmani

Because we can’t. I worked for an OEM a few years ago and one of things I worked on was an issue that would cause an engine rattle at startup. One customer was very unhappy about it and made a bunch of YouTube videos about the issue. I used those videos to convince management that we needed to solve the issue, and the fix went in for 2020, but communicating it to that customer could very likely have gotten me fired.

We’re listening, we just can’t always answer.

This. I lurked on Camaro5, Camaro6, Mustang5, Mustang6 and several Corvette forums for years, but never registered until I retired from GM. Wasn’t worth the hassle of trying to maintain anonymity and worrying that someone would recognize me by something I said. Especially if it was something I wasn’t s’posed to say. And yes, I did occasionally take things that I picked up on in forums to Engineering to let them know what “word on the street” was.

[Mark114]

There was a lot of good information from the Camaro team in the “Ask Al” section years ago. It’s unfortunate that we weren’t able to continue that interaction.

[Gunkk]

Originally Posted by Blobby

-The A8 issue- is the torque converter faulty?

No. TC's are fine. It was the fluid. And if the fluid issue persists for long enough it can fcuk up the TC. That's it.

-Adding led reverse bulbs. What is the proper in-parallel resistance to eliminate the glow when off problem?

Gen5DIY knows, but why should they tell their competition. If you want to publish the # then buy a harness and measure one. Post it here. Then everyone will know. And you'll be the dick who gave the finger to Gen5DIY and maybe put them out of business. Your choice if you want to be that guy.

[Joey Soul]

For the led reverse lights i added 1 resistor to 1 side and it solved the glowing issue.

[Blobby]

Originally Posted by Gunkk

Gen5DIY knows, but why should they tell their competition. If you want to publish the # then buy a harness and measure one. Post it here. Then everyone will know. And you'll be the dick who gave the finger to Gen5DIY and maybe put them out of business. Your choice if you want to be that guy.

There’s been several extensive write ups of people getting the right resistance for LEDs to work. The solution is no big secret. I just would like to know what’s going on in the computer that causes it. The whole resistor thing is something of a workaround. I’d just like to satiate my curiosity.

[pzoom]

Originally Posted by Blobby

There’s been several extensive write ups of people getting the right resistance for LEDs to work. The solution is no big secret. I just would like to know what’s going on in the computer that causes it. The whole resistor thing is something of a workaround. I’d just like to satiate my curiosity.

when I used to work for GM years ago, I couldn't talk about it esp since I was designing safety systems.

I don't have any background on the LED issue, but I know we would send current through the "load" for measuring impedances and continuity. A bulb takes time to light as the filament heats up while an LED is near instantaneous. So a test pulse would be not be noticeable on a bulb, but could be a flicker, flash, or dimly lit on an LED.