rear sub-frame removal

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G13SJC said:
The overall rolling radius of the above tyres is very similar. (Less than a few percent difference)

As the wheel size increases, the sidewall height compensates for the difference.

Regards,

Steve
Click to expand...
eh????
as you can see from dafts figures the last size has a width of 235 and a dia of 18. the profile is 60 which makes it a bigger tyre all round
the 17 in tyre has a smaller width and a smaller profile so its unlikey to be the same overall dia. th 18in tyre would have to have a 45 profile to be near the other two sizes
 
The Mad Hat Man said:
The prob as I see it is, if the hippoo has a rear diff of 3.2 ratio and the nissan is 2.5, if the same hippoo wheels/tyres are being used front and rear, then the tyres are going to be continually scrubbing (like a locked \vcU and it will blow the IRD to bits.
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unless you can find the same ratio fer front and rear yer gonna have to have different size tyres fitted. which would work without any problems.

not the best solution but it works on john deeres and all other 4wd tractors
 
slob said:
eh????
as you can see from dafts figures the last size has a width of 235 and a dia of 18. the profile is 60 which makes it a bigger tyre all round
the 17 in tyre has a smaller width and a smaller profile so its unlikey to be the same overall dia. th 18in tyre would have to have a 45 profile to be near the other two sizes
Click to expand...

Ok with the exception of the 18" tyre, most are within a few percent either way.

I would guess that either they didnt make a 235/45 R18 tyre (unlikely that they dont) or that it was too costly.

As far as other freelander sizes go

195/80 R15
215/65 R16
225/45 R17 are all reasonably close.

Its like other cars which offer a variety of tyre sizes, going from 14" to 17" - they are all very close to the original size, but not spot on.

Regards,

Steve
 
Do all the Hippoos have the same front diff ratio? I spose the same Q applies to other vehicles that use the PG1 box. Wonder what ratios they use?
 
PG1 uses a whole variety of ratios.

Freelander is 4.2 :1
Rover 220 Nasp is 3.9:1

Others like some Maestro / Montego use 3.6:1

Remember that the diff input splines are not the same size on the freelander due to the IRD drive. This would make substituting an issue.

Also the Freelander diff (in gearbox) uses needle roller bearings and not ball bearings like Rover Cars.

Regards,

Steve.
 
thats interesting - my Rave disk states that hippoos have the following rear drive ratios!what is going on?
 

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um. . . .dare i say this,ok jist my opinion, to incorporate the mod [2wd switchable 4wd] on the gaylander ,the best way [i fink] is ta fergit about the changin off diffs un fings, keep the vcu but on the first front drive shaft from the ird to the vcu to incorporate summit like wot mondo suggested a mag brake thats switchable [electrical] you would then have to put in electrical logics [safety] as you would not wunt to be doin 70mph in the fast lane un little ole porky switches on 4wd [smirk] but jokin aside my thoughts are , most times you would be 2wd [fuel saving + not so much wear to vcu un anyfink past that] we will for ref call this mondo mode. . .but if you switched it on you incorporate its old 4wd system. . . .brilliant. . .:) :) :)
 
so - why wud you have a diff ratio front to rear - surely that wud screw the ird, tyres, vcu, front and rear diffs as they wud be fighting each other?
 
The Mad Hat Man said:
so - why wud you have a diff ratio front to rear - surely that wud screw the ird, tyres, vcu, front and rear diffs as they wud be fighting each other?
Click to expand...

But yer not doin away with the vcu so you shunt have any problems
and you only need it on the slitty stuff Ooops just habit , I meant to say "slippy stuff":D

Or in my case do away wi rear wheel drive :confused: :rolleyes: :D
 
mondo said:
Oh!:eek:

He's dun it agen !!

how'd ya know me middle name wer fred ?????


SPOOKY!:D
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fred[oops mint mondo]. . .flippy mad scientist is tryin ta change the world agin, we are all doomed. . . .:eek: :eek: :eek: porkys really cryin now,cross bread slitty/gaylander noooooooooooooo!!!!!!!!! :eek: :eek: :eek:
 
The Mad Hat Man said:
so - why wud you have a diff ratio front to rear - surely that wud screw the ird, tyres, vcu, front and rear diffs as they wud be fighting each other?
Click to expand...

The front diff then drives the IRD input spline. Perhaps the IRD reduces the amount of drive (well we know it does slightly).

Or maybe the VCU is supposed to compensate. I dont have an engineering background, so can't really answer this one. Maybe the LR experts on here could help.

Regards,

Steve
 
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