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.
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 |
ACOUSTICS SECTION AUDIO SECTION CAR SECTION
HOME - Technical Website for Acoustics, Audio and Car