Thread: A few questions about 90's

Keep in mind too...

The ground clearance (under diff) is greater by 2" for a given tyre size over the Japanese offerings.

So a set of 33's will give you the same under diff clearances as a Cruiser on 35's

I ran various sets of tyres on mine the largest been the equivalent of a 345mm wide 35" tyre.

It was exponentially better off road on those than it was on the 255/85 Muddies, in the same way they were far better than the 235/85 all terrains it came on!

Having said that they had a habit of chewing up panelwork on the front. I had to run them with all the arches off before I modified all the front end panelwork drastically

Just to give you an idea of how big they were! And no they weren't used on the road atall!

Originally Posted by Tombie

Keep in mind too...

The ground clearance (under diff) is greater by 2" for a given tyre size over the Japanese offerings.

So a set of 33's will give you the same under diff clearances as a Cruiser on 35's

Tombie,
I'm confused as to how this is possible? Is the diff smaller? Isn't the height of the diff to the ground soley dependant on tire size? If so how do the two differ? (heh, differ )

Originally Posted by 90@

Here's another pic, standard sawtooth wheel (+20 offset) on the back with. 235/85r16.
315/75/r16 on the front.

Yeah, they look pretty mean compared to the 235/85's. Although from your first picture it doesn't look like it would take much up travel to start scrubbing?

Are extended bump stops needed for a 2" lift?

Originally Posted by Twelfthman

Tombie,

I'm confused as to how this is possible? Is the diff smaller? Isn't the height of the diff to the ground soley dependant on tire size? If so how do the two differ? (heh, differ )

Pumpkin size (and CW) are different - smaller - on a Land Rover Diff.

I’ll throw my 2c in. .

I have a 2.2 'puma' TDCI 90.

I have followed a 4door wrangler on 37's and sway bar disconnects the whole hog and was able to follow him everywhere in a 100% stock standard D90, while it may not have been as 'easy' for me I was still able to follow, i am sure there are plenty of places he could have gone I couldn’t have but if you are after the extremes of off-roading like that you should think about having two vehicles.
also followed a 2 door wrangler a mate owns 2" lift and 33" Mud tires with sway bar disconnects and rear 'auto locker'(mechanical LSD clunky lunchbox locker), again my 90 is 100% stock, I was able to go places he could not!

Towing off-road in the 90 i have only done once with a pretty light trailer, no issues, only time i noticed it there was down slippery hills (it had no brakes) and when the axle dropped into a ditch and gave the cab a jerk as it pulled out.

On road Towing, Ive done a fair amount of, while with 3+T on the back it does feel a little un-nerving when you have to stomp hard on the brakes you get that jack knife feeling for the slightest movements, but never had a rear issue. The little guy can get bit of a bounce going though due to the SWB.

35" tires are a silly Idea no matter what the car if you are talking about city driving, I drive my 90 into the city a few times a week, fit in parking spaces easy, it’s quite zippy for what it is and has great visibility, would rather drive it around town than a commodore. . throw big 35" mud tires 2" lift on it and I probably wouldn’t want to drive it anywhere.

Lifting the 'puma' is problematic, search on here for threads about the front pop shaft binding up, a double-cardon shaft is required.

my 2c
Leroy

Originally Posted by Leroy_Riding

I’ll throw my 2c in. .

I have a 2.2 'puma' TDCI 90.

I have followed a 4door wrangler on 37's and sway bar disconnects the whole hog and was able to follow him everywhere in a 100% stock standard D90, while it may not have been as 'easy' for me I was still able to follow, i am sure there are plenty of places he could have gone I couldn’t have but if you are after the extremes of off-roading like that you should think about having two vehicles.
also followed a 2 door wrangler a mate owns 2" lift and 33" Mud tires with sway bar disconnects and rear 'auto locker'(mechanical LSD clunky lunchbox locker), again my 90 is 100% stock, I was able to go places he could not!

Towing off-road in the 90 i have only done once with a pretty light trailer, no issues, only time i noticed it there was down slippery hills (it had no brakes) and when the axle dropped into a ditch and gave the cab a jerk as it pulled out.

On road Towing, Ive done a fair amount of, while with 3+T on the back it does feel a little un-nerving when you have to stomp hard on the brakes you get that jack knife feeling for the slightest movements, but never had a rear issue. The little guy can get bit of a bounce going though due to the SWB.

35" tires are a silly Idea no matter what the car if you are talking about city driving, I drive my 90 into the city a few times a week, fit in parking spaces easy, it’s quite zippy for what it is and has great visibility, would rather drive it around town than a commodore. . throw big 35" mud tires 2" lift on it and I probably wouldn’t want to drive it anywhere.

Lifting the 'puma' is problematic, search on here for threads about the front pop shaft binding up, a double-cardon shaft is required.

my 2c
Leroy

Hey Leroy,
Appreciate your input. I already have 2 vehicles, one being a 53 Willys CJ3B. So having another 'dedicated' 4x4 really isnt on the cards. As I'm well and truly pushing the ms. as it is! :P
Given the type of terrain we have in Aus I would like to think that the 90 would be adept at being an all rounder. Touring, DD and being able to tackle the tougher tracks.

I have 2 sets of tires atm and only use the 35's when I'm wheeling on the weekend / trips away. As for town parking, my big cruiser is already too big for that, even with my 32 AT's on. As for offroad, the 35's don't look oversized on such a big car at all and have done everything I've asked of them. The limiting factor being the approach / depart angles of the vehicle itself, hence me looking at the 90.

Like I said before, given that I'll have them, I thought I'd ask.

I will look into the DC shaft.

Also, it makes me happy to hear that the stock D'fer performs so well!

Cheers

Originally Posted by Twelfthman

Yeah, they look pretty mean compared to the 235/85's. Although from your first picture it doesn't look like it would take much up travel to start scrubbing?

Are extended bump stops needed for a 2" lift?

I've never had 35"s on a standard height 90 before, my 90's that I use with the 35"s on all have various degrees of lift on them.

My 2013 model 90 is slowly being fitted out to be used mainly as a tourer (I travel pretty lightly, so I don't need the room of a 110 or a 130), whereas I have other 90's that are used just for bush bashing trips.

I haven't ever used extended bump stops, but I know that some on here do.

Just be aware that with the big tyres on they may hit the inner guards or worse stuff up your shocks if you haven't done your homework with suspension calculations and test cycling of the suspension (I know all about both of these..... ).

Easiest thing for me was to clearance the inner guards, front and rear.
Early 90/110/130 front inner guards are metal and can easily be modified, later ones are plastic....

Rear inner guards have been cut out and new alloy panels riveted in to allow for the tyres to not hit while flexing.

On my bush bashers I have "Flat Dog" flares that are 50mm/2" wider than standard that are mounted further up that the standard plastic flares.
I have cut out the outer guards under the new flares on both front and rear guards to allow the bigger tyres to tuck in under flex.
This is something that I now realise is probably not needed.....

Here is a picture of one of my other 90's with 35's and flatdog flares, no problem under flex with tucking them into the guards until the axle and bumpstop meet

Regards,
Mike.