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8.8 TrueTrac Problems?
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<blockquote data-quote="CCS86" data-source="post: 14765001" data-attributes="member: 140595"><p>I am really surprised to hear these issues with the Trutrack. Right before I installed it in my '12 GT, I stumbled on this thread, and I was a little worried.</p><p></p><p>After a couple days driving around on the Trutrack, I could not be happier with it! I have driven around with the windows down and have not heard a single peep out of it. The Trutrack is almost invisible in its operation, smoothly sending torque to the wheel with the most traction. Even the worse case, a sharp right hand corner in the wet, couldn't even come close to spinning up the inside tire. </p><p></p><p>I wonder whether the issues people are having, are installation related, or a quality control issue. After some testimonials of their installations, I'm leaning towards the latter. As an engineer for a CNC manufacturing company, I can't say that I like seeing "made in Taiwan" on parts I am using, but for an assembly like this to cost $480 to your door, that's likely what you get. Their design is really pretty simple, with the crux of it being well cut gear tooth profiles and fairly narrow production tolerances between the mating parts of the assembly. I stuck my fingers in the unit before installing to check out the operation, and it took quite a bit of effort to move, with no perceptible lash. Maybe those with noise simply have a looser fit between mating gears, or to the case itself.</p><p></p><p>I didn't change rear gears, so I didn't have to mess with the pinion. I had planned on just matching the factory backlash, but found it to be about 0.0125", which is just out of spec. The shims included in the Motive install kit are complete garbage; mainly the thicker 0.100" shims. They are essentially saddle shaped, and could act like a spring washer, rather than a rigid shim. Also, the thinner ones included are 0.010", 0.015", and 0.020" (also sporting nice burrs on one side from the stamping process). That only gives you the ability to make changes of 0.005" or more; just not a fine enough increment to dial things in nicely. I was finally able to build a shim stack that put my backlash at 0.010" (after a lot of wet sanding!)</p><p></p><p>I started out with 85w140 Valvoline High Performance (dino), but am considering switching over to Amsoil Severe Gear down the road, after break-in; assuming things stay quiet.</p><p></p><p>If Eaton wants to outsource manufacturing to Taiwan in order to hit a certain price point and profit margin, that is up to them. But, a smart company would internally test the units to ensure quality, or at the very least, stand behind the product, happily exchanging a noisy unit with apologies (after ruling out install error). It sounds like about half of us are very happy with the Trutrack, and the other half are pissed (and rightly so), after receiving what we would call an "escape" at my company.</p><p></p><p>I think you guys with issues should kindly refuse to accept "normal" as an answer from Eaton. Rather than lash out at them (bad joke, haha), lay out the facts and ask them to do right by you as a customer. If anyone wants an eye proof reading a letter to Eaton, I'm happy to help.</p></blockquote><p></p>
[QUOTE="CCS86, post: 14765001, member: 140595"] I am really surprised to hear these issues with the Trutrack. Right before I installed it in my '12 GT, I stumbled on this thread, and I was a little worried. After a couple days driving around on the Trutrack, I could not be happier with it! I have driven around with the windows down and have not heard a single peep out of it. The Trutrack is almost invisible in its operation, smoothly sending torque to the wheel with the most traction. Even the worse case, a sharp right hand corner in the wet, couldn't even come close to spinning up the inside tire. I wonder whether the issues people are having, are installation related, or a quality control issue. After some testimonials of their installations, I'm leaning towards the latter. As an engineer for a CNC manufacturing company, I can't say that I like seeing "made in Taiwan" on parts I am using, but for an assembly like this to cost $480 to your door, that's likely what you get. Their design is really pretty simple, with the crux of it being well cut gear tooth profiles and fairly narrow production tolerances between the mating parts of the assembly. I stuck my fingers in the unit before installing to check out the operation, and it took quite a bit of effort to move, with no perceptible lash. Maybe those with noise simply have a looser fit between mating gears, or to the case itself. I didn't change rear gears, so I didn't have to mess with the pinion. I had planned on just matching the factory backlash, but found it to be about 0.0125", which is just out of spec. The shims included in the Motive install kit are complete garbage; mainly the thicker 0.100" shims. They are essentially saddle shaped, and could act like a spring washer, rather than a rigid shim. Also, the thinner ones included are 0.010", 0.015", and 0.020" (also sporting nice burrs on one side from the stamping process). That only gives you the ability to make changes of 0.005" or more; just not a fine enough increment to dial things in nicely. I was finally able to build a shim stack that put my backlash at 0.010" (after a lot of wet sanding!) I started out with 85w140 Valvoline High Performance (dino), but am considering switching over to Amsoil Severe Gear down the road, after break-in; assuming things stay quiet. If Eaton wants to outsource manufacturing to Taiwan in order to hit a certain price point and profit margin, that is up to them. But, a smart company would internally test the units to ensure quality, or at the very least, stand behind the product, happily exchanging a noisy unit with apologies (after ruling out install error). It sounds like about half of us are very happy with the Trutrack, and the other half are pissed (and rightly so), after receiving what we would call an "escape" at my company. I think you guys with issues should kindly refuse to accept "normal" as an answer from Eaton. Rather than lash out at them (bad joke, haha), lay out the facts and ask them to do right by you as a customer. If anyone wants an eye proof reading a letter to Eaton, I'm happy to help. [/QUOTE]
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