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Naks

Member Since: 27 Jan 2009
Location: Stellenbosch, ZA
Posts: 2638

2010 Defender 90 Puma 2.4 SW Alpine White

Ashcroft LT230 1.100 Gear Set

Gents, my transfer case needs to be rebuilt, the vibrations/backlash/whining are starting to sound quite terrible.

While it's out, I was thinking of swapping the internals for the Ashcroft 1.100 gear set: https://ashcroft-transmissions.co.uk/product/1-100-gear-set/

Has anyone else with a remapped (BAS) 90 2.4 done this and can provide feedback?

Thanks very much

--
2010 Defender Puma 90 + BAS remap + Alive IC + Slickshift + Ashcroft ATB rear
2015 Range Rover Sport V8 Supercharged

Defender Puma Workshop Manual: https://bit.ly/2zZ1en9
Discovery 4 Workshop Manual: https://bit.ly/2zXrtKO
Range Rover/Sport L320/L322/L494 Workshop Manual: https://bit.ly/2zc58JQ

7th Nov 2024 6:46am

MK

Member Since: 28 Aug 2008
Location: Santiago
Posts: 2414

2007 Defender 110 Puma 2.4 SW Chawton White

Since you will strip it down, you can take the opportunity to fit a central ATB. The Std central diff is a big source of slack in the transmission. And if you drive in a very hot region, the bigger sump is also a plus to keep your oil away from coocking itself.

Any reason you do not like the factory spec ratio? Puma 110" SW

.............................................................
Earth first. Other planets later

7th Nov 2024 11:20am

jst

Member Since: 14 Jan 2008
Location: Taunton
Posts: 8013

2011 Defender 110 Puma 2.4 USW Stornoway Grey

what size tyres are you running, do you tow and how heavy is the vehicle? whats its main use. on std setup diff, tyres thats roughly a 200rpm drop in top gear.

i have a 1.003 in my 90 on an m57. 255.85s and 4.11s so diff/tyres cancel each other out. that works well but would go anymore. 1.1 may work fine depending on usage. Cheers

James
110 2012 XS Utility
130 2011 M57 bespoke Camper
90 2010 Hardtop
90 M57 1988 Hardtop

7th Nov 2024 11:58am

Naks

Member Since: 27 Jan 2009
Location: Stellenbosch, ZA
Posts: 2638

MK wrote:
Since you will strip it down, you can take the opportunity to fit a central ATB. The Std central diff is a big source of slack in the transmission. And if you drive in a very hot region, the bigger sump is also a plus to keep your oil away from coocking itself. Any reason you do not like the factory spec ratio?

Hmm, not sure I have the budget for the central ATB. I already have the Ashcroft HD Cross Pin and Output Shaft kit, and both front & rear diffs have an ATB.

Since my 90 is remapped, I often find myself trying to change up from 6th on the highway

--
2010 Defender Puma 90 + BAS remap + Alive IC + Slickshift + Ashcroft ATB rear
2015 Range Rover Sport V8 Supercharged

Defender Puma Workshop Manual: https://bit.ly/2zZ1en9
Discovery 4 Workshop Manual: https://bit.ly/2zXrtKO
Range Rover/Sport L320/L322/L494 Workshop Manual: https://bit.ly/2zc58JQ

7th Nov 2024 12:40pm

Naks

Member Since: 27 Jan 2009
Location: Stellenbosch, ZA
Posts: 2638

jst wrote:
what size tyres are you running, do you tow and how heavy is the vehicle? whats its main use. on std setup diff, tyres thats roughly a 200rpm drop in top gear.

i have a 1.003 in my 90 on an m57. 255.85s and 4.11s so diff/tyres cancel each other out. that works well but would go anymore. 1.1 may work fine depending on usage.

I run 235/85R16, I don't tow, and vehicle is pretty light, mostly setup for 4x4 trails.

I just find the 2500rpm on the highway a bit too stressful on the drivetrain. --
2010 Defender Puma 90 + BAS remap + Alive IC + Slickshift + Ashcroft ATB rear
2015 Range Rover Sport V8 Supercharged

Defender Puma Workshop Manual: https://bit.ly/2zZ1en9
Discovery 4 Workshop Manual: https://bit.ly/2zXrtKO
Range Rover/Sport L320/L322/L494 Workshop Manual: https://bit.ly/2zc58JQ

7th Nov 2024 12:42pm

MK

Member Since: 28 Aug 2008
Location: Santiago
Posts: 2414

Not sure about the stress on the drivetrain, except maybe for the transfer case getting too hot and therefore degrading the oil quite fast. So the bigger sump may help to reduce the temperature. In my case I also wrapped a portion of the exhaust tube with insolation tape in front and side of the transfer case.

As for the engine at 2500 rpm, it wont do any harm and it will ensure high oil pressure. Puma 110" SW

.............................................................
Earth first. Other planets later

7th Nov 2024 12:52pm

jst

Member Since: 14 Jan 2008
Location: Taunton
Posts: 8013

Naks wrote:
jst wrote:
what size tyres are you running, do you tow and how heavy is the vehicle? whats its main use. on std setup diff, tyres thats roughly a 200rpm drop in top gear.

i have a 1.003 in my 90 on an m57. 255.85s and 4.11s so diff/tyres cancel each other out. that works well but would go anymore. 1.1 may work fine depending on usage.

I run 235/85R16, I don't tow, and vehicle is pretty light, mostly setup for 4x4 trails.

I just find the 2500rpm on the highway a bit too stressful on the drivetrain.

I believe 1.1 would work well in that situation. I tend to sit a bit slower around 2000rpm which is comfortable for me. Cheers

James
110 2012 XS Utility
130 2011 M57 bespoke Camper
90 2010 Hardtop
90 M57 1988 Hardtop

7th Nov 2024 9:37pm

Naks

Member Since: 27 Jan 2009
Location: Stellenbosch, ZA
Posts: 2638

Thanks chaps, gear set ordered, and I've also added the sump extension to the order.

I really did not have enough to order the central ATB, but I will save up for the next time the transfer box has an issue

--
2010 Defender Puma 90 + BAS remap + Alive IC + Slickshift + Ashcroft ATB rear
2015 Range Rover Sport V8 Supercharged

Defender Puma Workshop Manual: https://bit.ly/2zZ1en9
Discovery 4 Workshop Manual: https://bit.ly/2zXrtKO
Range Rover/Sport L320/L322/L494 Workshop Manual: https://bit.ly/2zc58JQ

8th Nov 2024 7:37am

Zed

Member Since: 07 Oct 2017
Location: In the woods
Posts: 3261

2010 Defender 110 Puma 2.4 XS CSW Santorini Black

That’s really interesting, let us how you get on. Usually the complaint is the opposite with revs being to low when motorway cruising. Some even swap out 6th gear for the lower ratio transit version which pushes up revs further to relieve excess wear on the main shaft. WARNING.
This post may contain sarcasm.

8th Nov 2024 7:55am

Naks

Member Since: 27 Jan 2009
Location: Stellenbosch, ZA
Posts: 2638

Right, but mine is remapped + various other mods, so when I'm cruising on the highway, I often try to change up a gear from 6th to 7th 🤣 --
2010 Defender Puma 90 + BAS remap + Alive IC + Slickshift + Ashcroft ATB rear
2015 Range Rover Sport V8 Supercharged

Defender Puma Workshop Manual: https://bit.ly/2zZ1en9
Discovery 4 Workshop Manual: https://bit.ly/2zXrtKO
Range Rover/Sport L320/L322/L494 Workshop Manual: https://bit.ly/2zc58JQ

8th Nov 2024 8:29am

MatLandy

Member Since: 11 Sep 2020
Location: Paris
Posts: 184

2008 Defender 110 Puma 2.4 CSW Zermatt Silver

On my 110 (Puma 2.4) I have the BAS 165BHP map + BAS Hi-flow intercooler + BAS silicone hoses + modified Airbox. With the added power on tap, I swapped the transfer box 4 years ago for an Ashcroft one with 1.1 ratio (instead of standard 1.2) and ATB. Tyres are BFGs AT K02 265/75 so same diameter as factory fitted 235/85.

I do not regret it a bit. The 1.1 ratio matches perfectly the extra power in my opinion, improves the 1st gear that was too short for my usage (I don't tow), enables cruising "more quietly" on french motorways at 130km/h speed -limit here- at just below 2500rpm in 6th (vs. more than 2700rpm with 1.2 ratio).

/Mat

8th Nov 2024 9:14am

Naks

Member Since: 27 Jan 2009
Location: Stellenbosch, ZA
Posts: 2638

Thanks Mat, that's almost exactly how mine is nodded, so the perfect use case. --
2010 Defender Puma 90 + BAS remap + Alive IC + Slickshift + Ashcroft ATB rear
2015 Range Rover Sport V8 Supercharged

Defender Puma Workshop Manual: https://bit.ly/2zZ1en9
Discovery 4 Workshop Manual: https://bit.ly/2zXrtKO
Range Rover/Sport L320/L322/L494 Workshop Manual: https://bit.ly/2zc58JQ

8th Nov 2024 9:20am

ashtrans
Site Sponsor

Member Since: 08 Nov 2008
Location: Harpenden
Posts: 257

Thanks for the order,

this is the type of application we made this kit for,

let us know what you think, Dave

8th Nov 2024 1:00pm

MK

Member Since: 28 Aug 2008
Location: Santiago
Posts: 2414

I ordered the LT230 bigger sump for my 110" Puma quite a while. Yesterday I "presented" it to the transfer box and now I am wondering if the exhaust pipe will bang it under severe vibration. Puma 110" SW

.............................................................
Earth first. Other planets later

8th Nov 2024 1:14pm

Zed

Member Since: 07 Oct 2017
Location: In the woods
Posts: 3261

Naks wrote:
Right, but mine is remapped + various other mods, so when I'm cruising on the highway, I often try to change up a gear from 6th to 7th 🤣

Blimey! What is the speed limit there? I don’t think I have ever got near the rev limiter in 6th. WARNING.
This post may contain sarcasm.

8th Nov 2024 5:44pm

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