RonBacardi8 wrote:J&L wrote:I run the 4.55 thick cut with the 121 ARB locker up front. A very tight fit but it works. For the 32" tyres (265x75x16) I run at 2850 rpm @100km/h (small variations as it depends on tyres and wear). The main advantage is even lower ratio than standard which save a clutch and I have torque for crawling at idle speed with 32".
The yoke stay standard up front as the splines of the pinion is the same but the rear needs a different yoke as it has less splines.
Johan
Is this 4th gear that's 2850 rpm or is it that in 5th gear?
Also what's your top speed in low range at 3000rpm?
I know there are preset tables/charts but I don't trust them as utes differ.
J&L wrote:5th gear . . . but that was for the 29" My mistake. I have to recheck for the 32" This makes it a bit lower RPM and shows I can go to 33" without loosing too much. I have to do a test for low gear as I have the 29" tyres on for city driving. I think around 50 but that's to be verified
Johan
scottsr20 wrote:this might be a dumb question, but why do you want to drive down the highway in forth any way? According to mmaaxx's chart you would be doing 3200 in 5th ! In forth it would be on the limiter! do you think 2600 is too low? I run 33s and stock ratios with an auto and I'm doing 2000 rpm at 115 . Get a heavy duty cluch and get it chipped - you won't need to look at the tacho anymore.
Skog07 wrote:Ron.
4.56 in a 4.0L petrol would probably work quite well with larger tyres.. 3000rpm in a diesel is not such a good thing but petrols can cope with it quite easily. You may notice a increase in fuel economy though. The diesels do have a fairly narrow band of usable power compared to the petrol models.
Cheers
Skog
scottsr20 wrote:this might be a dumb question, but why do you want to drive down the highway in forth any way? According to mmaaxx's chart you would be doing 3200 in 5th ! In forth it would be on the limiter! do you think 2600 is too low? I run 33s and stock ratios with an auto and I'm doing 2000 rpm at 115 . Get a heavy duty cluch and get it chipped - you won't need to look at the tacho anymore.
RonBacardi8 wrote:I think that chart is based on 4th as it will be calculating of 1:1 gear ratio (think 5th gear is 0.83:1, I have a heavy duty clutch already but I can't get the lux chipped because its a v6 petrol.
Skog07 wrote:The diesels do have a fairly narrow band of usable power compared to the petrol models.
scottsr20 wrote:this might be a dumb question, but why do you want to drive down the highway in forth any way? According to mmaaxx's chart you would be doing 3200 in 5th ! In forth it would be on the limiter! do you think 2600 is too low? I run 33s and stock ratios with an auto and I'm doing 2000 rpm at 115 . Get a heavy duty cluch and get it chipped - you won't need to look at the tacho anymore.
VMN wrote:the problem is that the Toyota vehicles in the US are petrol ones and have different drive train parameters so the 4.5's are not really designed for the Hilux 2005 and on unless it is a comp rig or something.
J&L wrote: Toyota cannot regear the transfer low ratio when the going get's tough hence the diff ratio has to change.
Skog07 wrote:The diesels do have a fairly narrow band of usable power compared to the petrol models.
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