Analysis of Limited Slip Differential (LSD) Parts for Toyota Corolla AE86 Levin / Trueno

7th April 2004

When the parts were first collected, It was disappointing to find that they are very small :( the biggest piece is no bigger than a palm :( and they don't look very new :(

Anyway, on with the show to elaborate every parts' physical dimension, thickness and properties.

First is the "adjusting washer 1.85 mm". It is extremely fragile. Please see the mark left by the vernier caliper, circle by red color ring. The light colored line sort of pointing north north by north-east.

If it is so fragile, wonder how short a term would it last in the axle?

Adjusting Washer mm
Circle Internal diameter 40.05
Circle External diameter 60.05
Positive edge to edge 73.1
Edge wide 14.75
Edge depth 7.2
Thickness 1.85

It is attractable by magnet and does not feel like steel of any kind. Feels very raw.

Then, 2nd the "thrust washer"

Everything is same when compared to the adjusting washer, except the thickness is 2.5 mm. If so, wouldn't it be better just to buy this so that both sides are 2.5 mm instead of one being 2.5 mm while the other is now 1.85 mm ???

But this thrust washer is slightly more expensive than adjusting washer, possibly due to it's extra thickness. Still it may be a better LSD setup.

3rd is the "clutch member thrust washer".

Clutch Member Thrust Washer mm
Circle Internal diameter 12
Circle External diameter 39
Side hole's diameter 4.65
Inside ring 4.05
Outside ring 4.65
Thickness 2

It is attractable by magnet. And I wonder why is it different color between sides? Different materials? Industrial Secret??? How come the manual does not say which color faces which side???

4th is the "clutch plate"

Clutch Plate mm
Circle External diameter 60.15
Circle Internal diameter smallest 35.1
Circle Internal diameter largest 38.8
Thickness 2

Finally the "springs"

They should be measured to find out the strength / distance. The result will be posted later. Bill Sherwood advice to place a 1 mm washer to increase the spring strength.

Spring mm
Outer diameter 10.8
Wire diameter 2.3
Spring length 40.25
Number of coil 12.2
Number of active coil 10.2
Strength / Distance  

 

  1. Rebuilt OEM Limited Slip Differential (LSD) from Toyota Corolla AE86 Levin / Trueno
  2. Acquired Parts of Limited Slip Differential (LSD) for Toyota Corolla AE86 Levin / Trueno
  3. Analysis of Limited Slip Differential (LSD) Parts for Toyota Corolla AE86 Levin / Trueno
  4. Check Limited Slip Differential (LSD) Performance from T-285 TRD 2-way for Toyota Corolla AE86 Levin / Trueno
  5. Overhaul TRD 2-way Limited Slip Differential (LSD) for Toyota Corolla AE86 Levin / Trueno - Part 1
  6. Overhaul TRD 2-way Limited Slip Differential (LSD) for Toyota Corolla AE86 Levin / Trueno - Part 2
  7. Overhaul TRD 2-way Limited Slip Differential (LSD) for Toyota Corolla AE86 Levin / Trueno - Part 3
  8. Overhaul TRD 2-way Limited Slip Differential (LSD) for Toyota Corolla AE86 Levin / Trueno - Part 4
  9. TRD 2-way Limited Slip Differential Cleaned
  10. How to know which Limited Slip Differential (LSD) is which?

 

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