4.2 GU Patrol problems with uphill starts

1. Turbo it.

2. put in 4L and don’t lock the hubs

3. just work the clutch and rev the chit out of it.

They must be steep hills.

G'day Mitch

If yours has auto hubs replace them with manual hubs (about $200.00). I replaced my auto's with manuals (AVM's). This allows use of low range in 2 wheel drive with no winde up. I have a steep driveway and also great in caravan/national parks when backing trailer on hard surfaces.

Regards

Paul

I know exactly what you're talking about Mitch.

Problem stems partly from the fact that most of us have fitted slightly larger tyres than "normal" (ie: most of us run 265/75R16 instead of the original 265/70R16). This would not normally be a problem except that the 4.2TD is also the only Patrol in the range to have been fitted with 3.9 diffs. Other ratios available are/have been, 4.1, 4.3, 4.6 and 4.8 (I think). If you log onto Marks Adaptors web site hwere they talk about the extra low-range gearsets they do, there is a comprehensive chart of the various gearing that each Patrol model has in it.

I recently looked into changing my diff ratios over to 4.1s and got as far as ordering and paying for a 2nd hand set for $950- (front and back diffs of course). However, then I started to sus out how much it was gunna cost to get the changeover done and it would have been an additional $1,700-. So I rang back the supplier in Adelaide and cancelled the order. They'd already had the parts freighted over from Melbourne, so I got back $80- less than what I'd paid. Expensive lesson, but I couldn't justify almost $3K just to change my diffs over. The result (if I'd gone ahead) would have been that the engine would have revved at about 2250rpm @ 100kph instead of the current 2050rpm. This would have made take-offs on slopes a bit easier, but trade off would have been in the engine wear and fuel economy. I also intended to fit 285/75R16s at next tyre change (if I'd gone ahead with the diff change-over) and I calculated that that would have made the gearing VERY close to the original gearing with the 265/70R16 tyres.

As it is now, I just have to live with it. I too have fitted the AVM hubs a few years ago (think they were about $160-) and can drive in 2wd-low range now without any wind-up.......just have to be mindful not to plant the right foot too hard or there could be issues for the back drive train I guess.

Hope this helps

Cheers

Roachie

This will only help occasionally - where there's ample space. But then it works very well.

If you reverse a metre or two and stop with the trailer at an angle to the car the first metre or so of subsequent forward movement will simply pull the trailer into a straight line. This hugely lessen the initial load. With luck the clutch can be fully engaged and the engine on song before the trailer and car are in a straight line.

I know the above is not the answer you seek - but short of smaller diameter tyres or fitting ute diff ratio (if the diffs fit) there's not a great deal more you can do - except add a supercharger (these give a bag of torque at very low revs but will increase consumption) - but a turbo is not the answer here - it may even worsen the problem.
Collyn Rivers

By far the cheapest and easiest option is as others have stated; fit the AVM manual hubs leave them unlocked and shift to Low 4x4, 2nd gear is the next one down from High first.
Another option is changing the gearbox for the one fitted in the following vehicles:
Naturally aspirated coil cab ute; Naturally aspirated Leaf sprung ute or the turbo leaf DX ute. This gearbox has a lower first,second and third gear and (I think) is also the gearbox used in early GQ, although they would be getting on in mileage by now. This option ain't cheap, but is your only choice if you wish to retain factory auto hubs etc.

try getting your injection timing checked and adjust the screw on your aneroid valve diaphragm to give you more fuel down low. (hope i spelt that right).