Thread: Anyone made a 6x6 pto for LT95?

The 110 bottom PTO wouldnt be much use because the chain drive from the mainshaft sharing the same space as the 6X6 output. Not that I have a LT95, but have considered the same problem with an overdrive.

My thoughts were to use a standard mainshaft constant gear mating the intermediate gear. This would be mounted on a new PTO shaft supported on bearings in a fabricated bottom cover. It would run in constant mesh with the intermediate gear and the PTO dog clutch would be external to the bottom cover.

6X6 pto is the same unit as perentie 4X4
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6X6 out put drives of the intermediate shaft to give road speed.like an overdrive in reverse.the drive gear is sort of copied[bit of imagination required] from the trans for non constant 4X4.

Ive seen a thomas pto on a civy 5 speed.it didnt have a tourque limiter only welded shear pins and a bent shaft.

laying around was different gears some had some didnt have chain sprokets so it might have been a special order for OZ assembly.a lot of early perities had been rebuilt on production to upgrade lubrication and oil pump leaks.

very few 5 speed boxes adapted to to old transfer box for civy sales and i saw one with under slung pto.

Sorry,possibly my thread title was confusing. I was thinking of making a PTO that gives both low and high range in order to drive a third axle.
Wagoo.

Wagoo.

Aren't you better installing a 6X6 drive transfer (Morse chain drive drop box) after the rear output, so that what ever ratio is being driven to the "B" axle is replicated to the "C"axle?



This way you can still change transfer ratio gearsets without having to replace the 6X6 output ratios.

Diana

Originally Posted by Lotz-A-Landies

Wagoo.

Aren't you better installing a 6X6 drive transfer (Morse chain drive drop box) after the rear output, so that what ever ratio is being driven to the "B" axle is replicated to the "C"axle?



This way you can still change transfer ratio gearsets without having to replace the 6X6 output ratios.

Diana

With respect Diana, I don't think you are familiar with the gear train layout of the Perentie 6x6 transfercase. It is very different to series or LT230s.
In simple terms all it consists of is an additional low range gear, identical to the one that is bolted to the back of the centre diff. This low range gear is fitted to a special PTO housing and is in constant mesh with the intermediate gear and therefore gives the same output speeds as the gear on the centre diff, both in low and high range.Whenever different high range gear sets are fitted to LT 95s only 2 gears are changed, The front gear of the 3 piece intermediate gear unit and its corresponding gear on the front of the centre diff .6x6 drive has no effect on changing high range ratios.
The Morse chain unit you suggested costs lots of wonga, take up space and the chain/sprockets are subject to stretch or wear.I believe the chain and sprockets should be replaced as an assembly for a satisfactory repair.
Wagoo.

You are correct I have never physically had my hands on the 6X6 output of the LT95, I have however however seen and studied the diagrammes of the assembly.

The problem with any 6X6 output that uses the alignment of the gearbox mainshaft, be it LT95, LT230, series, Nissan, Toyota, Martian or Venutian is that the gear ratios in the 6X6 drive output have to replicate the final ratios of the regular (front "A" axle and rear "B" axle). The simplest way is to have a single ratio that matches the low ratio main output (as you described), if however you want to match the high and low ratios you have to also match the final output of the two ratios and have a mechanism to both engage the output and change the 6X6 output ratios.

If you then decide that you want to change the high-ratio transfer gears, say 0.98:1 Perentie ratio to 1.12:1 Range Rover ratio you also have to machine a new set of 6X6 output gears to match the transfer box ratios.

If on the other hand decide to avoid to overly complex 6x6 output box, you can put a chain drive drop box (with a dog clutch to engage the "C" axle) after the rear output. With a drop box, you can engage high or Low ratio, change the gearsets or even drop in a completely different transmission and still retain the drive to the "C" axle matched to whatever ratios are engaged before it.

Is that sufficient understanding of the LT95 6X6 output?

With respect.

Diana

Sorry Diana, but you are still not getting it.The additional low range gear does not clutch to the mainshaft gear like a normal PTO but drives off the intermediate gear as does the centre diff, so output speeds of the PTo replicate those of the centre diff. Please reread my previous post and/or go back to your LT95 diagram and study it more carefully.
As I said, LT95s are different to series and LT230s.
Wagoo.

Sorry Wagoo

Please go back to my previous post.

It doesn't matter what transfer box it is, the drop box will always be simpler and end up cheaper in the long run.

Diana