My car is a 91 UZZ31, that says it has A01A (non lsd) however, my speedo is out by about 5km/h
And this afternoon on my driveway, I thought I'd try a small burnout on wet bricks - one foot on the accelerator and one foot on the brake. The car kicked sideways ever so slightly and the pictures are the result.
I'm honestly not sure if I do, but it would explain the speedo reading 5km/h higher, as the twin turbo torsen diffs have different ratios. Guess another way to find out would be to put it on a hoist and turn the wheels? What do you guys think?
Donuts in the dry are no more an answer than the tests you did or proposed, James. Take Daniel's advice, or if you really want to try an indirect method then stick one rear wheel on something slippery (e.g. wet grass) and the other on bitumen and accelerate. Jacking it up is useful only if your next step is to remove the back plate on the diff. Any test involving rotating one wheel against the other is derived from somebody's ignorance, as are all possible burnout methods.
Thursday, June 04, 2009 - 02:50 pm, by: James Buchan(Jrbuch)
It would appear that when I did the burnout earlier in the week my diff locked up - it's an open diff. Tried another one today, did a good job at it but had only one wheel spinning up. Still not sure why the speedo is out. This could be due to a different diff ratio or odd sized whee/tire combo.