Thread: Ashcroft Stage 2 4HP22, any probs?

Don't have the answers. But I do have a suggestion: email Dave Ashcroft. He, or someone, will answer. The answer will most likely be brief, but you will get one. Well, that's been my experience.

dave@ashcroft-transmissions.co.uk

Originally Posted by Werdenfelser

Hello everybody!

Have to change my Autobox asap. Will order a refurbished from Ashcroft.
Now, Stage 1 for sure. But what is with Stage 2?
The only concern I can see it is 15mm longer.

When I check my gearbox mounts, there should be enough space to cope with this.

But what is with the propshafts? Will it give me some problems there? Is the front one then to short and the rear one too long?

My D2 is on a 2“ lift actually, maybe this will it make more worse at the front?


Or the other way round, is it all the effort worth? Makes it that big difference?
My D2 sits on 32“ tires, new hybrid turbo from Jose is on the bench and it is most time full laden with camping stuff…

I am happy for all reviews and reports!

Hi

The ( much ) larger surface area of the "A" clutches are a huge benefit if you are intending to go above around 450 Nm , up to around that figure I usually just fit upgraded forward clutch packs.

Another benefit of fitting the full ZF24 is that you are future proofing the car in case you do want to run over 450Nm, reliably.

Don't forget the V8 converter and kit

You can use a rear shaft from the 4.6 V8 version ( TVB000330 ), or simply get yours shortened.

As for the front, just a 15mm spacer will be fine for a 50mm lift, such as a DA6339, though 20mm might be better.

I just finished building one yesterday, for a keeper (D2a)

It really wouldn't surprise me if the propshafts just take up the 15mm, the slip joints shouldn't be that marginal.


What would surprise me is if you get the extra 15mm out of the gearbox mounts.

That said, mine has had the 3/4th clutches upgraded to 4HP24 units and that doesnt make it a longer gearbox. That setup has been totally reliable with a ECU/IC/Boost and ATF cooler which is key, but I'm also not pushing the same power as what you're looking at.

I could be wrong, but I thought if you pushed big torque through an auto it just went into limp mode???

Originally Posted by Slunnie

It really wouldn't surprise me if the propshafts just take up the 15mm, the slip joints shouldn't be that marginal.

Interesting point. I think I'd be more concerned by the compression on the rear one than extension of the front. And I wonder if it might relieve some of the stress on the double cardan joint caused by the lift. But I could also be talking through my 18th letter of the alphabet.

Originally Posted by Tins

....18th letter of the alphabet.

Nice circumvent.

Originally Posted by Max Headroom 2.3m

Nice circumvent.

It's called learning from experience.

Slap a r380 and run 600nm plus without the common issues with the auto

Originally Posted by Slunnie

It really wouldn't surprise me if the propshafts just take up the 15mm, the slip joints shouldn't be that marginal.

If you're pushing big torque you want the front shaft to be as "engaged" as it can.

Unless you want to only ever drive on flat roads with no bumps and you're happy to jack the rear diff away from the transfer case just to fit the rear TD5 disco shaft, then I'd suggest using the shaft that Land Rover themselves used or shortening it.


What would surprise me is if you get the extra 15mm out of the gearbox mounts.

If you were to take a look under your D2, you'd see that the chassis side is slotted.... surprise!!


That said, mine has had the 3/4th clutches upgraded to 4HP24 units and that doesnt make it a longer gearbox.

No, what you probably have had someone fit is the Intermediate ONE WAY clutch from the 24, there are no frictions involved.

I could be wrong, but I thought if you pushed big torque through an auto it just went into limp mode???

Nearly Every manufacturer that wants to push big torque will opt for an auto box.

In the case of the electronic ZF 22 4 speeds, a good tuner can mitigate this to an extent.

At least you're consistent