Posts Tagged ‘Toyota Racing Development


Project KP30: TRD LSD Ratio Change

I thought I’d last the summer, but I couldn’t bear it; hounding Audi drivers out of the fast lane was fun, but the 3.3 ratio was killing me.  I had to build it back into my 4.1.  With a bit of help from Rog we got both diffs swapped in an afternoon.

The 3.3 was like new.  New bearings, plates, everything.  So I was able to just swap it straight over.

This is the last picture I took…we spent so much time setting up the lash I forgot to pic up the cam!

The good news is it’s all set up and back in the car.  Tomorrow is the first planned dive.  If it goes bang you’ll hear here first…


Project KP30: Cha Cha Racing Family TRD LSD

My search for an LSD for the KP had me talking to people from Ireland, New Zealand, Denmark and Blighty, but it was Koji from the Cha Cha Racing Family in Japan that came through for me big time.  Not only did he source, buy, send me hundreds of pics and even a Youtube video of the diff, he kindly wrapped it and sent it airmail for me.   As if that wasn’t enough, he included a couple of little presents for me…but more on them later.

I’ve had the diff out before on the KP; it’s one of the easiest diffs I ever done on a car: Prop, shafts, done.

Open 4:1 Vs 3.3 LSD

Only mods required to fit the diff into the casing were fitting 2 extended studs; Koji included these and a new gasket!

I’ve hardly had chance to drive the car, but lets just say it’s a handful.

Apart from the ability to now go sideways EVERYWHERE, dropping the ratio to 3.3 has changed the way the car dives massively.  1st to 3rd are OK, but it now has serious Motorway legs in 4-5th.  4000rpm in 5th is nearly 90mph!  The diff is perfect (no whines etc) so I’m not going to change the ratio back just yet, but probably over winter I’ll look to build into my 4:1.

I can’t thank Koji enough for sorting me out with the diff and extra presents!  Another thanks should go to Phil for hooking me up with some LSD oil!