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Discussion Starter · #1 · (Edited)
My stock diff basically does nothing in the way of limiting slip anymore (92k miles). Looking at the Eaton Trutrac upgrade.
I understand that it will fit into to the stock SS housing, is that right?
If so will the stock SS 3.70 ring and pinion also work with it, or do they need to be changed to a Camaro SS set (3.45 or 3.91)?
Anything I'm not thinking about?
 

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2014 PBM Chevy SS 6A
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My stock diff basically does nothing in the way of limiting slip anymore (92k miles). Looking at the Eaton Trutrac upgrade.
I understand that it will fit into to the stock SS housing, is that right?
If so will the stock SS 3.73 ring and pinion also work with it, or do they need to be changed to a Camaro SS set (3.45 or 3.91)?
Anything I'm not thinking about?
Yes it’s a direct bolt in
 

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I just dropped mine off to have a harrop true-trac fitted (Australia), itll be ready by the afternoon if all goes to plan. 68000km done on the stock LSD and it was still pretty tight but pushing a fair bit of power now so it comes under 'preventative maintenance' ;)

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Discussion Starter · #5 ·
Yes it’s a direct bolt in
Awesome, that's what I was hoping for

This is perfect timing! My LSD has given me the middle finger on Fri night. I am looking at options. LS3 VER33, can you keep me posted on your progress/selection?
Yeah will do, just working on getting a couple install quotes. I'm fairly mechanical, but this seems like one of those technical installs that, when messed up, will destroy itself!
Anybody have any idea what to expect on prices?
 
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Inception Date: 1 March 2017, Chevy SS Sedan, White, A6, Spare, No Sun
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I just dropped mine off to have a harrop true-trac fitted (Australia), itll be ready by the afternoon if all goes to plan. 68000km done on the stock LSD and it was still pretty tight but pushing a fair bit of power now so it comes under 'preventative maintenance' ;)

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I'm jealous that you live near Harrop, where you can have premium service by a specialist that knows the VFII like the back of their hand. I ordered the true-track directly from Harrop AU, but it's still in my office until I find a shop I trust. Unfortunately, even some of the boutique speed shops that I use have turned down the job. One of the better ones' refused to install customer parts. Another shop said, "we have never done one, but we'll give it a shot." 😖
 

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Awesome, that's what I was hoping for



Yeah will do, just working on getting a couple install quotes. I'm fairly mechanical, but this seems like one of those technical installs that, when messed up, will destroy itself!
Anybody have any idea what to expect on prices?
I paid $AU3250.00 drive in/drive out which included fresh bearings as well as the new centre, so that's $US2372.50 by today's exchange rate

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I'm jealous that you live near Harrop, where you can have premium service by a specialist that knows the VFII like the back of their hand. I ordered the true-track directly from Harrop AU, but it's still in my office until I find a shop I trust. Unfortunately, even some of the boutique speed shops that I use have turned down the job. One of the better ones' refused to install customer parts. Another shop said, "we have never done one, but we'll give it a shot."
I feel your pain. Am very lucky to be situated here, this platform is insanely popular in Australia and the aftermarket is very strong right now. Hope you're able to find someone who knows what they're doing to install!

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I have a Truetrac and love it. It is seamless on the street. Works very well. I have it in a 3.45 Camaro diff. However the one big caveat.... It clunks on and off throttle due to the backlash in the differential gears (not ring and pinion gears). Eaton says this is normal. I did the install myself along with new bushings, carrier bearings, JRE caps, and new cover. I was able to reuse my shims and kept the same R&P backlash. I took it to a 4wd shop to double check my work and the pattern for $100.
 

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Discussion Starter · #10 ·
So here's the update: broken stuff.
Ended up buying the trutrac a few weeks ago, but haven't taken the time to find a shop that i want to install it. So still running the oem stuff.
Yesterday i got some terrible wheel hop after getting on it in 2nd (cold and a little wet.) I got out of it as soon as i realized, but not soon enough i guess. about 10 seconds later i hear some harsh clunks. Not exactly sure what broke, it runs smooth and quiet most of the time but seems likely that its the lsd part. It mainly acts up when turning, and i noticed in a gravel lot that when turning to the right the inside tire seems to be locked with the outside tires, so it's being overdriven and spins. Thought about pulling the cover off to get a look, but looks like it's a pain to get to it. (also found leaking rear shocks while under there :))

Planning on getting it to a shop tomorrow, but question is: if it actually ends up having damaged the ring and pinion, can I replace it with the 3.91 camaro gears, and still use the stock housing? Or do i need to get a whole camaro chunk? I understand that there is no option for just getting the stock 3.70 ring and pinion, correct me if wrong.
 

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So here's the update: broken stuff.
Ended up buying the trutrac a few weeks ago, but haven't taken the time to find a shop that i want to install it. So still running the oem stuff.
Yesterday i got some terrible wheel hop after getting on it in 2nd (cold and a little wet.) I got out of it as soon as i realized, but not soon enough i guess. about 10 seconds later i hear some harsh clunks. Not exactly sure what broke, it runs smooth and quiet most of the time but seems likely that its the lsd part. It mainly acts up when turning, and i noticed in a gravel lot that when turning to the right the inside tire seems to be locked with the outside tires, so it's being overdriven and spins. Thought about pulling the cover off to get a look, but looks like it's a pain to get to it. (also found leaking rear shocks while under there :))

Planning on getting it to a shop tomorrow, but question is: if it actually ends up having damaged the ring and pinion, can I replace it with the 3.91 camaro gears, and still use the stock housing? Or do i need to get a whole camaro chunk? I understand that there is no option for just getting the stock 3.70 ring and pinion, correct me if wrong.
If the housing is fine yes you can reuse it for whatever 218 gear in the 3.xx like 3.73 or 3.91.
 

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The research I've been doing says no you can not use a Camaro gears in your SS housing. The SS gears are specific to our cars. there was a few SS gear sets for sales a few years back AFAIK they are no where to be found now.
The weak leak in our diffs is the LSD.
 

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The research I've been doing says no you can not use a Camaro gear in your SS housing. The SS gears are specific to our cars. there was a few SS gear sets for sales a few years back AFAIK they are no where to be found now.
The weak leak in our diffs is the LSD.
He doesn’t have an SS diff if he’s got a truetrac. Only made for a 218 gear which is a Camaro diff. Thought this was a well known thing by now.
 

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You did read LS3 VER33 (OP) post from 3 hours ago that states he bought a trutrac but it's not installed yet? Did I miss something?
Did you miss the truetrac was ONLY made for 218 not ours? You cannot put the 218 in ours either. You need to replace the housing with the 218 from the Camaro. If anyone talks about the truetrac then it’s implied they have 218 carrier already because of it not being made for our housing size.

edit: yup definitely missed it. My bad. Everywhere you buy a truetrac it says Camaro so I don’t understand why they are even asking if it fits the stock unit. Either way you need a 218 Camaro carrier @LS3 VER33 and it don’t fit the stock unit so don’t waste your time at the shop unless you get one. Again my bad @ddipert
 
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Discussion Starter · #16 ·
Did you miss the truetrac was ONLY made for 218 not ours? You cannot put the 218 in ours either. You need to replace the housing with the 218 from the Camaro. If anyone talks about the truetrac then it’s implied they have 218 carrier already because of it not being made for our housing size.

edit: yup definitely missed it. My bad. Everywhere you buy a truetrac it says Camaro so I don’t understand why they are even asking if it fits the stock unit. Either way you need a 218 Camaro carrier @LS3 VER33 and it don’t fit the stock unit so don’t waste your time at the shop unless you get one. Again my bad @ddipert
Ok thanks for this, exactly what I needed, pardon my ignorance!
Next question: on camaro SS diffs: looks like there is 3.27 (A6), 3.45 (M6), and 3.91 (1LE). Is there any differences between these that I need to worry about, assuming I have the trutrac and also buy the gear i want separately. 3.91 gears are only about $350, and the difference in price between a 3.27 and a 3.91 is about a $1000.
 

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Ok thanks for this, exactly what I needed, pardon my ignorance!
Next question: on camaro SS diffs: looks like there is 3.27 (A6), 3.45 (M6), and 3.91 (1LE). Is there any differences between these that I need to worry about, assuming I have the trutrac and also buy the gear i want separately. 3.91 gears are only about $350, and the difference in price between a 3.27 and a 3.91 is about a $1000.
Get the auto because it’s cheaper. Cases are the same. Only case that’s the issue is the zl1. Once you have a 218 carrier put whatever gear you want in it with the truetrac.

Edit: just had a thought @LS3 VER33, make sure it’s a 218 carrier and not the 195. They are more expensive than the smaller ones by 250 or more. The price starts around 500-800 for a 3.27 218. Average is around 650. The 195 is around 250 bucks or less. They were only available in the v6 lfx Camaros. Read the sticker on the side arms and make sure it says 218 before you buy one.
 

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Discussion Starter · #18 ·
Ok i knew that the ZL1 had some clearance issue and was wondering if there would be a smaller spec V6 one so that makes sense. I'll look out for that, thanks again for the help.
 
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