Rear LSD Testing
Thread Starter
Evolving Member
Joined: Apr 2007
Posts: 185
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From: Coronado, CA
Here is what I'm reading on Weir's site, and I'm assuming they are talking about TRE in part of it:
"Our kit comes with 12 new plates which adds one more clutch per side gear within the LSD. This is the ONLY real aftermarket 12 plate kit that lets you keep the spring discs on each side of your LSD without having to machine the pressure rings. Without these spring discs, there is zero preload within the LSD. So, what do the "other guys" use in their LSD's? Well, they use O.E.M. parts and either remove the disc springs or machine the pressure rings so they can fit the extra plate into the stock LSD casing. Are they replacing all of your used plates with new ones? The answer is no, they are only adding one new plate to each side of your LSD. With our MAXGRIP kit your LSD will lock harder and firmer than you ever thought possible and still remain street friendly. The best part is you can install this kit on a Saturday in your garage and save the expense of shipping your diff and down time."
I'm curious what folks think about it...and the differences between the two. Can I expect a performance difference with TRE's gear detailing, shot peening, etc, or is it a durability factor or both?
"Our kit comes with 12 new plates which adds one more clutch per side gear within the LSD. This is the ONLY real aftermarket 12 plate kit that lets you keep the spring discs on each side of your LSD without having to machine the pressure rings. Without these spring discs, there is zero preload within the LSD. So, what do the "other guys" use in their LSD's? Well, they use O.E.M. parts and either remove the disc springs or machine the pressure rings so they can fit the extra plate into the stock LSD casing. Are they replacing all of your used plates with new ones? The answer is no, they are only adding one new plate to each side of your LSD. With our MAXGRIP kit your LSD will lock harder and firmer than you ever thought possible and still remain street friendly. The best part is you can install this kit on a Saturday in your garage and save the expense of shipping your diff and down time."
I'm curious what folks think about it...and the differences between the two. Can I expect a performance difference with TRE's gear detailing, shot peening, etc, or is it a durability factor or both?
I'll call the shop tomorrow and clarify what they were testing for. Maybe it was a cursory inspection to see if the car had a TRE/Shep/Weir aftermarket LSD. I asked them to identify any aftermarket parts they could. The USDM plate configuration on the rear LSD would explain why it responded differently from the front LSD when they did the test. Now, after looking at the inspection sheet they provided a "broken" rear LSD was NOT included. I enjoyed the dialogue! LOL
Seriously....thanks for taking the time to help me out! - Rick
Seriously....thanks for taking the time to help me out! - Rick
Drain the rear diff fluid. If it is not silver and there are no chunks, replace the rear diff fluid. Unless you notice a drastic problem with spinning only the inside rear tire when getting on the gas around a corner your diff is working properly. . .
EVOlutionary
Here is what I'm reading on Weir's site, and I'm assuming they are talking about TRE in part of it:
"Our kit comes with 12 new plates which adds one more clutch per side gear within the LSD. This is the ONLY real aftermarket 12 plate kit that lets you keep the spring discs on each side of your LSD without having to machine the pressure rings. Without these spring discs, there is zero preload within the LSD. So, what do the "other guys" use in their LSD's? Well, they use O.E.M. parts and either remove the disc springs or machine the pressure rings so they can fit the extra plate into the stock LSD casing. Are they replacing all of your used plates with new ones? The answer is no, they are only adding one new plate to each side of your LSD. With our MAXGRIP kit your LSD will lock harder and firmer than you ever thought possible and still remain street friendly. The best part is you can install this kit on a Saturday in your garage and save the expense of shipping your diff and down time."
I'm curious what folks think about it...and the differences between the two. Can I expect a performance difference with TRE's gear detailing, shot peening, etc, or is it a durability factor or both?
"Our kit comes with 12 new plates which adds one more clutch per side gear within the LSD. This is the ONLY real aftermarket 12 plate kit that lets you keep the spring discs on each side of your LSD without having to machine the pressure rings. Without these spring discs, there is zero preload within the LSD. So, what do the "other guys" use in their LSD's? Well, they use O.E.M. parts and either remove the disc springs or machine the pressure rings so they can fit the extra plate into the stock LSD casing. Are they replacing all of your used plates with new ones? The answer is no, they are only adding one new plate to each side of your LSD. With our MAXGRIP kit your LSD will lock harder and firmer than you ever thought possible and still remain street friendly. The best part is you can install this kit on a Saturday in your garage and save the expense of shipping your diff and down time."
I'm curious what folks think about it...and the differences between the two. Can I expect a performance difference with TRE's gear detailing, shot peening, etc, or is it a durability factor or both?
And why would a shop charge you for all new plates if you don't need them?
Evolved Member
Joined: May 2011
Posts: 964
Likes: 0
From: New Zealand
Imma just bump this thread.
I had my rear wheels off the ground so I thought I'd test the LSD (wagon is supposed to have same mechanical rear diff as JDM RS/GT) while it was up. The wheels spun the opposite direction, which made me a bit nervous given that it normally indicates an open diff.
Just to ease my mind, this is expected on evos?
I also had a go at the fronts, one would rotate freely and I couldn't move the other one, is that normal? (Wagon is supposed to have helical front LSD).
+1
When you spin the tires alone, the opposite tire will spin in the opposite direction. This is because of the spider gears. When my diff was still apart, I was messing with the spider gears. I put just the gears together and when I turn one side, the other side turns opposite. Turning the wheel while the car's in the air isn't really a good way to know if you have an LSD or not. All Evos come with LSDs.
When you spin the tires alone, the opposite tire will spin in the opposite direction. This is because of the spider gears. When my diff was still apart, I was messing with the spider gears. I put just the gears together and when I turn one side, the other side turns opposite. Turning the wheel while the car's in the air isn't really a good way to know if you have an LSD or not. All Evos come with LSDs.
Just to ease my mind, this is expected on evos?
I also had a go at the fronts, one would rotate freely and I couldn't move the other one, is that normal? (Wagon is supposed to have helical front LSD).
I was leaning towards TRE but the downtime...and cost....has me leaning towards Weir.
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