DCCD & Gearbox

[Method]

Hi,

Just wanted to share my experience with my DCCD and the Gearbox, being new to RA's I wanted to check if what I was experiencing was normal or not.

I have noticed I can't do any low speed meneuvors if the DCCD is on anything but diff free (first green light/wheel all the way back), even trying to turn around in a dry car park I can feel the inside tyre biting and the car feels like it's hopping if that makes sense (I have Bridgestone RE70's, about 50% worn all the way round).

I tend to engage the DCCD once I am moving depending on how hard I am pushing the car or the road surface. Today was mostly dry so I left it diff free however I had to wind it up to the first orange earlier in the day as it started raining quite heavily, noticed the car felt slower off the mark in comparison to when it's in diff free mode (e.g. cruisting at 50mph+ and then opening up the throttle).

Also noticed something with the gearbox, if I have DCCD engaged I can feel the gearbox winding up if that makes sense, e.g. I am at 6k rpm, slowing down getting ready for a down shift, I can feel the gearbox still winding away while the clutch is pressed - a few times it felt like the gearbox was spinning faster than the engine rev's, kind of off putting.

Didn't really notice it shifiting up. When the diff is open I don't really notice it, car feels smoother to drive as well. I tried matching rev's etc to see if I could cure it but didn't really seem to make a difference.

Nothing to worry about or signs of something wearing out?

[usedtobeWhiteRAman_nowsilverMazdaMPS6man]

Everything sounds totally normal to me.
I am surprised you have not mentioned the normal type RA gearbox whine as well, this is most apparent on tight low gear corners with the window open.

Ralph

[Dunk RA]

sounds quite normal to me as well

[johnny99]

Sounds ok. When you run the DCCD in the most open position, lots of slip is allowed between the front and rear diff's. As you adjust the roller switch up, you are limiting the amount of slip allowed. It is not a central diff is the normal sense, but a viscous coupling. The front to rear bias is always the same, you are just controling the amount of of slip. I hope this makes sense to you.

John

[Method]

Ah that makes a lot more sense, nothing to worry about then. Didn't think it was an issue with the gearbox being such a low mileage one but wanted to check all the same.

I have noticed the diff whine, didn't really pay attention to it until you mentioned it Ralph, was filling up today and as I moved off and engaged the second green light I could hear the diff whining :D

I have to keep reminding myself the car is not so sound proofed, can hear everything that is going on - will take a bit of getting used to

[type-ra]

Ah that makes a lot more sense, nothing to worry about then. Didn't think it was an issue with the gearbox being such a low mileage one but wanted to check all the same.

I have noticed the diff whine, didn't really pay attention to it until you mentioned it Ralph, was filling up today and as I moved off and engaged the second green light I could hear the diff whining :D

I have to keep reminding myself the car is not so sound proofed, can hear everything that is going on - will take a bit of getting used to

Remember,

Just pull the handbrake until the dash light illuminates & it will revert to open diff.

Useful for parking etc