Thread: D1 auto - overdrive kick in point

I just slip the t-bar between d & 3, particularily to change down to third for hills. Much easier and cheaper.

Originally Posted by nice1guv

Hi, I have a 1996 D1 V8 auto.

The overdrive kicks in at pretty much exactly 80km/h.

Can this be changed to kick in at say 90km/h?

How hard is it to change?

It changes hydraulically.
Therefore I don't like your chances

I'd love to be able to alter mine, as well.
It's a pity it was not electric of vacuum, then we could.

1996 V8 auto box: is this normal?

I have four normal gears plus the overdrive?

I regularly drive around in 3, manually changing to D (4th) at around 70km/h, then if I hit 80km/h it switches to overdrive.

Originally Posted by trobbo

I just slip the t-bar between d & 3, particularily to change down to third for hills. Much easier and cheaper.

Ditto!
You took the words right out of my mouth!

Originally Posted by Romulus

Ditto!
You took the words right out of my mouth!

I do already use the shifter to shift down if needed, but this isn't what I'm after.

I want to get more out of 4th gear before it switches over to overdrive.

If you're giving it some in D, it will virtually go from 3rd to overdrive! with basically no 4th!

I have four normal gears plus the overdrive

There is four forward gears, one of which is an overdrive.

It's not overdrive that's happening at 80 (it'll be in overdrive by 45 km/h under a light throttle (as per my Tdi)). What you're noticing is the lock up clutch in the torque converter engaging.

I think somewhere like A&B automatics in Dandenong can modify the governor to provide different lock up speed.

Originally Posted by B92 8NW

There is four forward gears, one of which is an overdrive.

It's not overdrive that's happening at 80 (it'll be in overdrive by 45 km/h under a light throttle (as per my Tdi)). What you're noticing is the lock up clutch in the torque converter engaging.

I think somewhere like A&B automatics in Dandenong can modify the governor to provide different lock up speed.

That's what I thought.

Why do you want it to lock up later? I love that clutch. What I want is to be able to lock/unlock it on demand. Chuck it in 1, drive away, lock it up... unlock it, change to 2, lock it up... I assume you would have to unlock it when changing gears... edit: but still be able to keep it as normal when it's in D...

not sure what use it would have, but wouldn't it help fuel economy?

Originally Posted by B92 8NW

There is four forward gears, one of which is an overdrive.

It's not overdrive that's happening at 80 (it'll be in overdrive by 45 km/h under a light throttle (as per my Tdi)). What you're noticing is the lock up clutch in the torque converter engaging.

I think somewhere like A&B automatics in Dandenong can modify the governor to provide different lock up speed.

Ok, now I'm really confused.

Keep it below 80km/h and no overdrive or lockup clutch, hit 80 and it feels like another gear (like an electronic overdrive I had on another car) and the revs drop heaps.

On my car at least, it certainly doesn't happen at 45km/h under light throttle or at another speed - only 80km/h and above.

If you drop below 80 it kicks out and the revs go up. The car has more power before it kicks in at 80, so if I want to burn up a hill (on-road) at 90 it will be in " overdrive" and have not much power, if I manually shift it back to 3 then I'm in third and the revs are too high at 90. I want to be able to hold it in 4th with out it going to "overdrive".