Dual cab or half cab?

Submitted: Thursday, Oct 08, 2020 at 22:34
ThreadID: 140612 Views:9425 Replies:4 FollowUps:9
This Thread has been Archived
Looking at the options for towing 2.5 ton van.

I recall in a previous thread, where it was suggested (Les PK Ranger?) that a half cab was a better option, due to towball weight/ stress on chassis? Looking at the distance between axle and tow ball, they both appear identical. Am I missing something else here? I’d prefer to go with the right choice but there are far more dual cabs available to choose from.

Input appreciated.
Back Expand Un-Read 0 Moderator

Reply By: Member - DW Lennox Head(NSW) - Friday, Oct 09, 2020 at 06:09

Friday, Oct 09, 2020 at 06:09

As far as I am aware, the chassis are identical. I have had both.

The only difference is that the tray lengths are different. The added length may strengthen the chassis slightly.

AnswerID: 633679

Follow Up By: Member - nickb "boab" - Friday, Oct 09, 2020 at 06:28

Friday, Oct 09, 2020 at 06:28
Agree ..the longer tray ( 300 mm apox )allow you to put weight in front of the axle more . Definitely more double cabs to choose from .
Cheers Nick b

My Profile  My Blog  Send Message

FollowupID: 910751

Follow Up By: Nomadic Navara - Friday, Oct 09, 2020 at 10:33

Friday, Oct 09, 2020 at 10:33
You can order the same length of the tray to be the same as that of a single cab if the ute is being purchased principally for towing. This will keep your weight forward and you will also not have to climb under the tray when hitching or unhitching.
Retired radio and electronics technician

Lifetime Member
My Profile  Send Message

FollowupID: 910753

Reply By: Gbc.. - Friday, Oct 09, 2020 at 06:21

Friday, Oct 09, 2020 at 06:21
Possibly mentioned in regards to loading the vehicle AND towing? You can get your vehicle payload over or in front of the axle better with a smaller cab. Agree that for towball weight in isolation there is usually zero difference. Iirc the last model to do different wheelbase versions of the same model was the Holden RC Colorado and Isuzu RC Dmax. Cab chassis was some 180mm odd longer than well bodied Ute so there was a distinct advantage in getting a cab chassis for towing so long as you didn’t also add a stupidly long tray and then a towball extension to match as plenty did.
AnswerID: 633680

Reply By: RMD - Friday, Oct 09, 2020 at 08:42

Friday, Oct 09, 2020 at 08:42
If the same overhang is in either dual cab, extra cab or single cab then the chassis stress is the same. The loading within the vehicle alters though. If looking for shorter overhang with sufficient tow rating, perhaps an Mux will do the job. It has less overhang. Some people want less overhang and then have proprietary tow bar and tongue combination which wildly increases the ball to axle distance and think nothing of it's negative effects. You have to consider all components involved.
AnswerID: 633682

Reply By: Stevemac - Friday, Oct 09, 2020 at 10:27

Friday, Oct 09, 2020 at 10:27
Thanks for the replies so far, guys.

I think the issue I was thinking of, in the previous discussion probably referred to the ability to load the tub further forward but... that being the case, if I chose a dual/double cab instead of a half cab, and mindful of this, I could make sure the rear of the cab (back seats and floor) had plenty of ballast to achieve the same/similar result?

I would also be installing a long range fuel tank and wondered if this extra capacity might also bring extra ballast, (particularly when full, of course) hopefully with a bias forward of the Oem tank and in any case, is forward of the rear axle.

AnswerID: 633687

Follow Up By: Member - nickb "boab" - Friday, Oct 09, 2020 at 11:14

Friday, Oct 09, 2020 at 11:14
Stevemac : I have the extra cab and have a long-range fuel tank up behind the cab in the tray I also put the heavy items far Fordward as possible like you are mentioning here .
I find the configuration of doors on the extra cab to be an excellent choice for accessing the vehicle when travelling camping etc and you do not lose too much space inside and an extra foot on the tray as for the stress on the chassis it's all a matter of balancing the load IMO
Cheers Nick b

My Profile  My Blog  Send Message

FollowupID: 910754

Follow Up By: RMD - Friday, Oct 09, 2020 at 11:47

Friday, Oct 09, 2020 at 11:47
A bit of confusion with LR tank or an AUX tank, If you fit a Long range tank then the original is gone and the extra fuel is now carried in effectively the same space. An Auxilliary tank however, can be as Nick mentioned, up front of tray/tub. I have dual cab and have 40L of water ,slim tank, and 50 litres of AUX fuel immediately behind it, then home made drawers. Whatever you carry, I regard the ability of the suspension to be paramount and if it is compliant, with sufficient ride height, good performing shocks and no bottoming to cause sudden chassis destroying stress, it all should work well for you. There is always stress on a chassis, they are designed to take it, only when the design ability is exceeded is there a problem.
FollowupID: 910755

Follow Up By: Stevemac - Friday, Oct 09, 2020 at 12:16

Friday, Oct 09, 2020 at 12:16
Well, aux or replacement is another issue. I did favour the Longranger aux tank, mounted up against the rear of cab but the accessories people that I trust don’t do the aux. I have had an aux before, which worked well with fuel gauge able to display accurately but I dare say I’d cope with replacement tank fuel gauge display discrepancy/adjust.

Hmmm... a fair bit to consider. Was thinking going new but might go used if a good un appears.

FollowupID: 910756

Follow Up By: Member - nickb "boab" - Friday, Oct 09, 2020 at 16:16

Friday, Oct 09, 2020 at 16:16
Stevemac : regarding aux tank .. i don't know what brand of vehicle you are thinking of But the px ranger like mine can be a nightmare , sensing any little changes to the system . I have my auxiliary tank running into the filler / Inlet fuel pipe and only while the car is stationery otherwise it does not register correctly on the fuel gauge .
Cheers Nick b

My Profile  My Blog  Send Message

FollowupID: 910758

Follow Up By:- Friday, Oct 09, 2020 at 17:04

Friday, Oct 09, 2020 at 17:04
Hi Nick,

A Ranger, would you believe? :)

That was my original preference, having had a gravity fed one before but that was on a 130 Defender, which was great. I am moving back to the idea of a replacement tank after coming to terms (I think) with the gauge. As far as I understand, with a 140/122 tank, once the fuel level gets down to the oem level, which the gauge understands, it reads as normal. Whatever, it doesn’t appear to be a major problem. The main thing I wanted to get my head around was the effect of towball weight on super ab as opposed to dual cab. I am thinking that loading the rear of the cab seats/floor might do the trick. I was also thinking about a toolbox in the tub up against the back of the cab but the access becomes an issue. I didn’t really want to go the further expense of a custom canopy.

This was the tank that originally caught my eye:


FollowupID: 910759

Follow Up By: mountainman - Thursday, Oct 15, 2020 at 22:24

Thursday, Oct 15, 2020 at 22:24
Superior engineering sell chassis strengthening kits now for utes
Be a peace of mind to spend a $1000 - 1300 and get the work done
If your going to deck the ute out and tow heavy

Just buy the ute you like / want.
And get the work done to the chassis
Listening to some arm chair experts aint best.
You need to be able to live with the vehicle you buy than...
This weight over the axle stuff.

No brand is better than the other
They all need to be thicker materials.
The kits also arent vehicle specific like one brand has issues more than the other.
Like the kits is only done for one type
Theyre is a range of kits you can buy
Soo dont go off the axle crap rules to stop you choosing the better vehicle for you ( going off forum chit chat craaap )
You need to enjoy your vehicle

Than regret a purchase off some critics on a forum
FollowupID: 910829

Follow Up By: Batt's - Saturday, Oct 17, 2020 at 10:46

Saturday, Oct 17, 2020 at 10:46
Most of those types of chassis kits but not all of them are designed to strengthen only between the rear leaf spring mounting points for those looking for a band aid fix because they use air bags incorrectly and bend their chassis instead of upgrading the springs to suit the load. There is a fear out there that you will get a harsh ride when empty yes it will get firmer but choosing a good quality shock and also using rubber bushes instead of poly will help.

The chassis area between the front of the rear spring mount and back of the cabin is a high stress area when the vehicle is not loaded correctly and is then prone to damage this area may need strengthening if you don't know how to load a vehicle correctly or have the wrong vehicle for the job and expect it not to fail or are just plain ignorant of what is safe and what isn't which is the usual case.

If you want to or think you need a chassis strengthened get a proper engineer to look at it not someone that supplies kits to fools for their own profit instead of talking to the customer and addressing the issue correctly like where is the weakness in the chassis now as you have greatly reduced the twisting and flexing ability of the area that you've strengthened. There is a lot more to it then just welding on some fancy looking pieces of flat bar and thinking you've solved all the issues that can arise when off roads in harsh conditions.

Is this the sort of thing your referring to mountainman from us supposed arm chair experts.

FollowupID: 910861

Sponsored Links