Hi guys,

Just experimented on tightening my front diff on the the TT-01. Instead of using nitro tubing I simply took one of the small leftover rubber O-rings that were used to keep the side mirrors and spoiler in place (they fit perfectly!!). One I spin one of the front wheels, all the wheel turn, the only way I could get the other front wheel to spin in the opposite direction was to hold the rear wheels really tightly.

Test Drive:

Ok, well the first thing: much more control than before (I drift ABS), I usually spun out around in the other direction as soon as I began to counter-steer too much. Right now, I can definitely feel more control and counter-steering is no longer an issue. However, I'm still wondering if I should just lock the front diff completely.

What do you guys prefer? Tightening your diff or locking it completely?

I leave the front diff open and lock the rear on my TT-01

I locked mine and will leave it locked at all time.

i locked my rear and kept the front open. from my experience, i believe that by doing this, it makes drifting more sensitive. it was really easy to oversteer on the drifts and you need to be precise on the throttle. but i also found that you could hold the drift longer.

tight but not locked

im still experimenting but ive found that with the front diff locked, car understeers like a pig on tight turns when off throttle.

Test Drive #2:

I used one more of those O-rings on the diff and I've gotten much more control. Now, spinning out is a thing of the past (unless I decided to do donuts), the car is much more controllable during the drift, I can link my drifts from one corner to the next with ease. IMHO, a winning combination.

I have to agree with you. For drift or grip driving, I go with a spool up front, and use light grease in the rear diff. With the spool, slide angle is more controllable with throttle input.

Unlike 2wd cars, 4wd has the ability to simultaneously push and pull the car thru a turn, giving you the ability to apply throttle as you pass thru curves. Tight curves, as mentioned above, require throttle application, and a revised driving style.