Question 1 re Jackaroo

Submitted: Saturday, Dec 02, 2006 at 08:39
ThreadID: 39977 Views:2622 Replies:7 FollowUps:8
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Brought the newly aquired 2000 Jack home yesterday, & was somewhat surprised
how nicely it drove. Now I must attend to a few things in preparation for a red
centre /Kimberley trip in April. The first being tyres..no I dont want to know what
brand, but would appreciate info on standard rims & where they may be sourced,
do other 16 by 7 rims fit? Are there other tyre options other than 245/70 ?
Yes I have done a topic search but found the info a little confusing. All
contributions most welcome...oldbaz.
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Reply By: Darian (SA) - Saturday, Dec 02, 2006 at 09:18

Saturday, Dec 02, 2006 at 09:18
Just been to the red centre, and the Kimberley in a 99 SE TD jack (plus CT in tow) - home via the Tanami - are you expecting wheel trouble ?
AnswerID: 208118

Follow Up By: Darian (SA) - Saturday, Dec 02, 2006 at 18:16

Saturday, Dec 02, 2006 at 18:16
Good to see below that others have had a good run on stock tyre sizes on the alloy Jack rims ! We too have done quite a few decent bush trips in the Jack on BFG's (second set now) - yet to have a flat with that brand in 7 years - with conservative driving, frequent adjustment of pressures to suit terrain (we carry a compressor) we haven't yet needed the two spare cases we carry on top of the camper. On the last Kimberley trip out of Adelaide, our two companion vehicles (also conservative drivers) had no flats either. I'll have a flat tomorrow of course, after having passed this comment, but it seems that most vehicles we see on trips with chewed tyres seem to be either overloaded or flogged.
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Follow Up By: Member - Barry M (NSW) - Sunday, Dec 03, 2006 at 17:54

Sunday, Dec 03, 2006 at 17:54
Darian, no, not expecting wheel trouble at all. I would like to source 4 std rims to
fit new tyres to go on Jack & transfer 4 Dunlop Grand Treks to C/t so everything
interchanges.I'm happy to go with 245/70 if they come in LT, I havent checked what tyres are available in that size. BFG & Cooper at least judging by the replies.
Your point re overloading & speed is well made. My last such trip in 1990
included GRR & Tanami, no punctures in 15k on Roadgrippers. Light & Steady..
Steel rims on mine, not interested in alloys unless I can find them cheap.
Thanks for your help..oldbaz.
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FollowupID: 468291

Reply By: Wetty - Saturday, Dec 02, 2006 at 09:51

Saturday, Dec 02, 2006 at 09:51
Hi Barry.

I have a 96 Jack and have just gone through a similar thing with tyres. I was contemplating putting 265/75's on it but was talked out of it by the fitter. As I do mostly beach work he said that the footprint of the 265 was goint to load up my transfer case too much and cause possible failure. Having a suspect gearbox already, I opted to stick with the original profile and run them at 40 psi. If you change your rim size, change your tyre profile to keep it roughly the same as the original and you should be OK.

Cheers

Wetty
AnswerID: 208125

Follow Up By: Member - Barry M (NSW) - Sunday, Dec 03, 2006 at 17:59

Sunday, Dec 03, 2006 at 17:59
Wetty, thanks for responding. I am happy to stick with std rim & tyre size 245/70 &
hope to get some new LT tyres & shift the Dunlop Grand Treks onto the C/t so
everything interchanges. What rubber are you running?...oldbaz.
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FollowupID: 468292

Reply By: Chucky - Saturday, Dec 02, 2006 at 11:02

Saturday, Dec 02, 2006 at 11:02
My inlaws just did a similar trip in April this year in a 2002 Jackaroo T/D towing a C/T. They went from Cunnamulla across to broome throught the centre up through Kununara to Darwin and east across the gulf country to Townsville.
They just got a still sunny rim to suit when they bought new tyres.
They ran Cooper ST's and didn't have a one flat on the entire trip.

My wife and 12 month old also went onthe trip, even my cruiser got to go on the trip, I couldn't.......Damm work.:(
AnswerID: 208136

Reply By: anglepole - Saturday, Dec 02, 2006 at 13:13

Saturday, Dec 02, 2006 at 13:13
Have a look at the tyre placard in the front door "frame" the silver one lists the other approved tyre sizes.

BFG 225. will do an excellent job, never had a puncture.

Cheers
AnswerID: 208150

Reply By: Member - Arkay (SA) - Saturday, Dec 02, 2006 at 14:44

Saturday, Dec 02, 2006 at 14:44
Ran a 97 Jackaroo on standard size tyres for over 140,000km. All types of terrain, mud, sand, sharpish rocks, bitumen, dirt roads, etc. Used BFG A/T Kumhos, and always at the maximum reccomended tyre pressures. Never had a punture or a blow out (as such). On one occasion on a very tame forest track the front tyre threw a 6 inch wedged stone back at just the right angle for the rear tyre to impale itself and the stone went straight through to the inside of the tyre. Throgh the thickest lump on the front of the tyre. That's when I found out the worst part of the std. 245/70 tyre.....they are almost inpossible to find anywhere outside metro area. As a temporary backup we fitted an old std. Prado 16" tyre to the spare rim, just in case we needed put it on the rear axle to get home (cost $20). We didn't need it. The manufacturers options on the tyre compliance plate are very limited with the Jackaroo. Your insurers may not appreciate non-compliance tyres.
AnswerID: 208159

Reply By: Gerhardp1 - Saturday, Dec 02, 2006 at 16:16

Saturday, Dec 02, 2006 at 16:16
Why were you surprised at how nicely it drives? All we Jackaroo owners know that already :)

If it has standard torsion bars, they will be a bit soft when you crank them up, so suggestion 1 is to go for new (and they will be thicker) torsion bars. If your front shockers are in good order you won't need longer ones as the total travel remains unchanged.

Grab some new rear springs with a 40-50mm lift, and insert some polyairs or similar. You may need new shockers here for the extra length. The shockers don't need to be super good ones because the air bags take a lot of the work the shocker would normally do.

You can get 16" rims from some Nissan models which have the same offset as the Jackaroo. If you want to go wider tyres you need to be cautious of protruding past the body - this will throw stones and sandblast your paint so you would need some of the rubber flares.

I have 245/75-16 LT tyres on mine on the original 7" Alloy wheels. These give a bit more height, and gear it up around 4-5%, and provide superior puncture resistance to the 245/70s. No puncture problems with these on the Cape York trip. I was towing a camper which is fitted with 265/70-16 so If I had required more than one spare I planned to transfer 2 of the camper rims to the Jack (thus making 4wd unavailable but mobile again).

Hope this helps.

Gerhard

AnswerID: 208172

Follow Up By: Member - Barry M (NSW) - Sunday, Dec 03, 2006 at 18:11

Sunday, Dec 03, 2006 at 18:11
Gerhard, us Jack drivers do indeed know how well they drive, but until this week I had no idea, but I am impressed. The ride is good too. Mine only has 80K so I wont
be touching the suspension yet but will keep your suggestions on file. Do I need to go to 245/75 to get LT constuction & what brand/type are you running? I would
like to get 4 more std rims & new tyres for Jack, then move current Dunlop Grand
Treks back to C/t ,so everything is interchangeable...oldbaz.
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FollowupID: 468297

Follow Up By: Gerhardp1 - Sunday, Dec 03, 2006 at 18:38

Sunday, Dec 03, 2006 at 18:38
Hi Barry,

Yes, you will need 245/75 to get LT.

I'm using Pirelli Scorpion A/T which are pretty good on everything.

For sand running the pressure needs to be below 25psi, on gravel/rock outback roads 32psi is good, and on bitumen 40psi is good. In mud they would be pretty useless.

I thought about getting some steel jack wheels from the wrecker, but they wanted an insane price so I elected to put the LTs on the mags.

Anything you put on will make the Jack exponentially safer on wet roads than with the grandtreks, which get harder and harder and almost can't be worn out. My originals did 85000 with no appreciable wear from 70,000 onwards, but it was a handful in the wet !

I would suggest putting new rear springs in at the very least if you plan to load the car up and go on any tracks with humps in the centre. It only costs $220 for this (it's a dead easy job to fit them, remove the bottom shocker nut, jack up under the towbar, old springs fall out, jack up a bit more and slip new ones in, lower jack, do up shockers) and will allow you to raise the front by an inch. This will prevent you from scraping your exhaust/transfer case bash plate on every stone. The OEM springs are only adequate at best and at 80,000 will have lost a lot of their strength.

When I replaced mine I swore at myself for delaying it as the car was so much better after. Gone was the banging on every rock in the high country and gone was the stress of hitting a rock with the sump.
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FollowupID: 468301

Reply By: Noldi - Sunday, Dec 03, 2006 at 19:22

Sunday, Dec 03, 2006 at 19:22
Hi Barry,
I had new tyres ftted to my 01 Jack june (15,000Ks ago) 265x75, Very happy, rides well gives me a bit more clearance.
Was told by some that they would not fit, would overgear the car, would increase fuel consumption, would decrease fuel consumption, I would get picked on by the cops. In reality have had none of these problems.
I tow a CT (around 700kgs) and have never had a problem. I would not go back to the smaller tyres. does put the speedo out by exactly 10% though.

have fun

Rgds

Ian
AnswerID: 208369

Follow Up By: Matt.D (WA) - Monday, Dec 04, 2006 at 00:34

Monday, Dec 04, 2006 at 00:34
I agree Ian. I put 235/85's on my old Jack and was told I would have all sorts of problems. Did About 80k in it without a glitch and it improved the ground clearance immensely. You hear so many different arguments to each side of the story that sometimes you just have to back your judgement.

cheers Matt.
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FollowupID: 468411

Follow Up By: Noldi - Monday, Dec 04, 2006 at 09:36

Monday, Dec 04, 2006 at 09:36
Very true, had a similar, discussion on Shocks.
Just had a great weekend down Dwellingup, last one for the year.

Rgds
Ian
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FollowupID: 468433

Follow Up By: Member - Barry M (NSW) - Tuesday, Dec 05, 2006 at 14:19

Tuesday, Dec 05, 2006 at 14:19
Hi Noldi & Matt, thanks for the info on 265/75 & 235/85 tyres. Good to hear from people who have actually used them. Bit of scuttlebutt about these sizes around so
I wasnt sure. I solved my rim problem, picked up 5 Jack alloys at my favourite shop, ebay, for $400 the lot, inc tyres. Dont know about the tyres but I'm happy
with the rims for that money. Will cost a tank of fuel to go to Sydney tomorrow to
pick up. The source may be a Jack wrecker, will check on that & post if of use, but may not suit your location. Anyway thanks again for the good info...oldbaz.
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FollowupID: 468692

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