Re: Good bye 4.2
Posted: 01 Nov 2012 14:22
Grant, I have agonized a little over whether I should respond or not, seeing that I am now also one of "them"
, but in the end I decided to go ahead, because I would have posted this even if I still had my Troll. This is obviously a Nissan forum, so some bias is to be expected, but I am going to challenge some of what you posted (as I have also done under similar circumstances on more than one occasion on the LCCSA forum, I might add).
. The durability of the Y60/Y61 Patrol's driveline is legendary, even in severe competition work.
Differential failures (often ring & pinion) are not unknown on the 80 and especially 100 Series Land Cruisers. As mentioned, these components are typically smaller than those in the Y60/Y61, but the 4.2 turbo-diesel and 4.5 fuel injected petrol motors fitted to these vehicles (80 GXL, 80 VX, 105 a.k.a. 100 GX) generates quite a bit more torque than the TB45E or TD42 motors in the Patrols (obviously the TB48DE is another kettle of fish
). In addition the Cruisers have significantly lower low range gearing, which means that the torque at the differentials would be much higher than in the case of the Patrols. Obviously the beefier bits in the Patrol would be better able to withstand this, but at some point one needs to draw the line when beefing things up (bigger crown wheels and and other heavier rotating driveline bits lead to increased driveline losses and dulled acceleration). The increased power and lower low range obviously has benefits as well. There are less powerful versions of the above mentioned Cruisers (e.g. those running the 4.2 NA diesel motor), but these ones are not known to suffer from the differential issues.
As far as the manual transmissions are concerned, I think the one rotten apple in the Crusier lunch box is the R150F and R151F gearboxes that are used in the current diesel engined 79 Series pick-ups and the 76 Series wagon (as well as the Hilux and Fortuner and the diesel engined versions of the older 105 Series). There have been a number of disappointing failures involving this gearbox, but the H150F and H151F used in the petrol engined versions of the 79 (and in the older 80 Series and petrol engined 105 Series) are definitely at least the equal of the manual Patrol gearboxes and are actually probably even more durable.
And do we can continue making lists:

I am not sure whether you are referring to the LCCSA? As in any group of people there would be the less knowledgeable ones, the beginners, the clowns, the idiots, etc. There definitely are very experienced and knowledgeable members there as well, guys that have a broad knowledge of off-highway motoring and the vehicles. I do not believe that it is fair to generalise.Grant wrote:I have spent many weekend with the LC Club. Great bunch of guys![]()
but not much knowledge whenit comes to 4x4's. They can only talk about there trucks. Most of the time I supprised them all
![]()
.
The Y60 and Y61 Patrols are very, very competent offroaders, but I can not agree with your statement. Any difference in performance between, say a Y60 Patrol (without rear diff lock) and an 80 Series Land Cruiser (without axle diff locks) will be miniscule as far as the vehicle itself is concerned. Any noticeable difference would be down to the different skill levels of the drivers. There simply is nothing that significant to differentiate the two vehicle layouts.Grant wrote:Cruisers need front and rear diff locks to go where we do.
The Patrols and the Cruisers each have their relative advantages and disadvantages as far as durability is concerned. I absolutely agree that the Patrol's driveline is super heavy duty; compared to my Y61 Patrol, the 80 Series' differentials and axle housings actually look quite daintyGrant wrote:Makano motors is a LC specialist gaurage and mad you must see how they line up there on Mondays after the trail. Gearbox and diff problems. Had my clutch fitted at Makano and Johan (owner) commented that they the Trolls GB and TB are at least 25 kg's heavier![]()
.

Differential failures (often ring & pinion) are not unknown on the 80 and especially 100 Series Land Cruisers. As mentioned, these components are typically smaller than those in the Y60/Y61, but the 4.2 turbo-diesel and 4.5 fuel injected petrol motors fitted to these vehicles (80 GXL, 80 VX, 105 a.k.a. 100 GX) generates quite a bit more torque than the TB45E or TD42 motors in the Patrols (obviously the TB48DE is another kettle of fish

As far as the manual transmissions are concerned, I think the one rotten apple in the Crusier lunch box is the R150F and R151F gearboxes that are used in the current diesel engined 79 Series pick-ups and the 76 Series wagon (as well as the Hilux and Fortuner and the diesel engined versions of the older 105 Series). There have been a number of disappointing failures involving this gearbox, but the H150F and H151F used in the petrol engined versions of the 79 (and in the older 80 Series and petrol engined 105 Series) are definitely at least the equal of the manual Patrol gearboxes and are actually probably even more durable.
And do we can continue making lists:
- The Y60 and especially the heavier Y61 Patrols are known to be afflicted by fatigue issues of the rear coil spring mountings on the chassis if they are used extensively under heavily laden overlanding conditions.
- Some Land Crusier 100 Series vehicles with the turbo diesel motor are afflicted with durability issues where the front torsion bar springs attach to the lower A-arms under similar conditions.
- Nissan have a skeleton in the cupboard as far as the ZD30 motor is concerned...
- ...as does Toyota with the 1KZ-TE (to some extent)
- etc