Free wheeling hubs worthwhile on fornt of pajero?

Submitted: Thursday, Apr 03, 2008 at 10:12
ThreadID: 56227 Views:9426 Replies:5 FollowUps:7
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I have the NJ (1996) with 'superselect' 4wd.
Means the 4wd / 2wd selection occurs in the front diff by disengaging one axle, and the transfer case. So the axles are still being turned in 2wd.
Now, I can get the free wheeling hubs of a GL (base model), which means I can't select 4wd on the fly without first locking them in.

But how much would it save in fuel economy?

Rough testing I have done running in 4wd and 2wd shows a saving of about 1l to 2l/100k?

Sort of like doing the conversion on a 100 series LC, taking it back from full time 4wd to 2wd.

Rough figures of $300.00 for the hubs, and 1l/100k saving, and fuel at $1.50/l, suggests it will take 200,000k to get the money back!

Any one tried it? Any results?
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Reply By: KSV. - Thursday, Apr 03, 2008 at 10:43

Thursday, Apr 03, 2008 at 10:43
My results on 80 series LC suggest economy in vicinity of 1L/100km. But keep in your mind that there is other kind of economy as well – I do not need revamp my front end as often if I am using free-wheeling hubs.

AnswerID: 296331

Follow Up By: age - Thursday, Apr 03, 2008 at 13:12

Thursday, Apr 03, 2008 at 13:12
"I do not need to revamp my front end as often...." What ?? I have seen AWD 80 series Cruisers with 400K+ km that have never had to have a revamp of the front end - the rest of the truck is trashed at this point and the front diff etc is the least of maintenance worries. My own 80 series I punished with 200K+ kms of mostly beach work towing a boat and never had to touch the front end other than standard sevicing/fluid replacement.

For the 1l/100km gain you have made I think you have lost in the safety factor of constant 4WD and 4 wheel compression braking in a diesel AWD.


FollowupID: 562410

Follow Up By: KSV. - Thursday, Apr 03, 2008 at 14:42

Thursday, Apr 03, 2008 at 14:42
Hi age!

My comment mainly was related to front swivel hubs and CV joint. I have got my current truck with 200K on clock and they required attention. I postponed it because plan to install diff locks and when I was ready I did it in one hit. Also I discover that CV joint will need to be replaced next time when I will do hubs (recon about 300-350K mark). As to diff – it was virtually in pristine condition, not like rear one where I have to replaced all bearings. As for free-wheeling hubs (FWH) versus AWD I was specifically search vehicle with FWH because I do not believe that safety issue what you mention makes that difference, but in return I do not have central diff – IMHO weakest point in all transmission. I am very happy with what I have and believe that such setup most suitable for hard-core 4WD, although agree that AWD with centre diff has some advantages in certain situation (high-speed snow driving for example).

FollowupID: 562423

Follow Up By: Member - Oldplodder (QLD) - Thursday, Apr 03, 2008 at 16:40

Thursday, Apr 03, 2008 at 16:40
All good comments.
Thanks for that.
Thinking I would run on the bitumen in 2wd, hubs out.
As soon as I hit dirt, lock hubs in which allows me to select 4wd/2wd on the fly at up to 100km/hr as per usual superselect system.
FollowupID: 562440

Reply By: EaglePatrol - Thursday, Apr 03, 2008 at 11:41

Thursday, Apr 03, 2008 at 11:41
We did a outrigger bearing on our Pajero's front drive train last Oct. Got stuck in Mt Magnet for 4 days while we waited for parts. This cost us accommodation as well as the repair. If we had had free wheeling hubs then we could have just drove home and repaired locally.
AnswerID: 296345

Follow Up By: Stephen M (NSW) - Thursday, Apr 03, 2008 at 12:56

Thursday, Apr 03, 2008 at 12:56
HI there EaglePatrol, I presume this would be an issue on my prado too if it decided to do a bearing ?? I have also been told that I cant flat tow a prado ?? Unless I first pull out the front drive shaft due to it been an AWD ?? True or False ?? I wouldnt have a clue. Regards Steve M
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Reply By: Member - Oldplodder (QLD) - Thursday, Apr 03, 2008 at 16:44

Thursday, Apr 03, 2008 at 16:44
Not quite sure what you mean by outrigger bearing?
This the bearing outside the diff on the inner end of the drive shaft?

If it is, I could see that it would be hard to pull the drive shaft out.

I have lost 4wd before now with the front drive shaft end dropping out of engagement with the diff.

Good point though.
AnswerID: 296408

Follow Up By: EaglePatrol - Thursday, Apr 03, 2008 at 17:33

Thursday, Apr 03, 2008 at 17:33
Looking from the front with the diff on the right hand this bearing is at the far left end of the casing supporting the (long) drive shaft just before the universal joint. Got some water in the casing which rusted out the bearing.
FollowupID: 562451

Follow Up By: Member - Oldplodder (QLD) - Thursday, Apr 03, 2008 at 22:22

Thursday, Apr 03, 2008 at 22:22

Know the one
FollowupID: 562576

Reply By: Member - Paul C (NSW) - Thursday, Apr 03, 2008 at 19:47

Thursday, Apr 03, 2008 at 19:47
Gday John
What is the outcome you are trying to achieve?
You've answered your question when it comes to dollar savings.
Is there another reason?
Stress on the drivetrain could be a consideration but I don't know how much benefit you would be gaining.
Personally, i like the idea of "shift on the fly" (except Low Range) but then again I can be lazy and have an aversion to getting wet and muddy if I'm already comfortable in a nice warm vehicle.

Scenario 1: Out on a jobsite with some tree loppers, we finish the job. Time to leave of well graded tracks and come to a small but steep hill. Stop Pajero, into low range proceed. Cruiser ute towing a shredder starts the climb and comes to a stop, hop out and lock in hubs then low range and away again.

Scenario 2. Driving through Swan Hill last year heading North hit a clay dirt road with the following sign. Been bitumen up until that point and pouring with rain. Best way to proceed is in High Range. Super Select engaged and me still dry.

Image Could Not Be Found

AnswerID: 296445

Reply By: Glenn_co - Friday, Apr 04, 2008 at 09:21

Friday, Apr 04, 2008 at 09:21
I have Manual free wheeling hubs fitted to my 95 Pajero same as yours. There are great befinits it fitting these including, longer CV boot live (no longer turning all the time) and able to use 2wd low range for reversing van into tight spots (just select 4wd low with hubs in free). I used genuine Mitsubishi free wheeling hubs (second hand) from a base model pajero or Triton also known as ASIN hubs and only cost around $120 from the wreckers.
Regards Glenn
AnswerID: 296576

Follow Up By: Member - Oldplodder (QLD) - Friday, Apr 04, 2008 at 18:15

Friday, Apr 04, 2008 at 18:15
You just got me thinking again that it might be worthwhile.

$120.0 - good price.

Have a problem moving boats, vans and CT around the hill we call home, and do ocasionally use low range, but mindful of the windup.
Solution - yes.
FollowupID: 562723

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