Thread: Isuzu MSA Gearbox to LT230

Originally Posted by Lotz-A-Landies

Sorry to rain on the parade and I feel for Vern, however this is the very issue I was indicating when I discussed replacement mainshafts. But seemed to get flamed for suggesting the notion.

To build a new shaft for a series is the only way to go.I was only trying to point out that to pay big money or time to degrade an Isuzu shaft to something smaller than a series was not .Alignment becomes even more of an issue and imagine the cost and work involved in the unlikely event of a breakage .Heres another way machine flange to a sprocket,a sprocket splined to a adaptor shaft and a duplex chain connecting them together.A slinger on the lay shaft and you have lubrication and misalignment covered

Noel

Originally Posted by Lotz-A-Landies

Sorry to rain on the parade and I feel for Vern, however this is the very issue I was indicating when I discussed replacement mainshafts. But seemed to get flamed for suggesting the notion.

Certainly not how I read that discussion, and if that was a flaming I'd suggest you have sensitive skin!!

Steve

Originally Posted by steveG

Certainly not how I read that discussion, and if that was a flaming I'd suggest you have sensitive skin!!

Steve

Not sensitive skin, just observing numerous comments indicating it was a silly thought bubble!

Originally Posted by Ancient Mariner

1/ I don't know of any one

2/ Its certainly possible But why? .There are 6 different bearing surfaces 4 different splines as well as a thread to control end float shaft run out is max.008" standard .002 which is easy till the heat treater gets his hot little hands on it The mainshaft as it is will handle anything a ****y little 4b will put it thru till you put a crappy 10 spline for the TC gear on the end of it

Noel

Originally Posted by isuzurover

Diana just wants to convert the MSA box to the Land Rover philosophy. Take something that is well designed and works, then put one weak part in it that will cause oil leaks and premature failure...

Originally Posted by Ancient Mariner

Why would it be out of line I had .002" TIR when all bolted up the shaft is a firm fit to the flange ....
Noel

Originally Posted by steveG

Isn't the alignment controlled by the accuracy of the adapter housing?
I don't see how a one piece mainshaft is going to help with that.

My thought is that a splined adapter shaft (like AncientMariner has done) is a more accommodating of any slight misalignment than a stub shaft like TheGrubb's.

Regarding spline lubrication - if its a real issue how about running the adapter wet?

Steve

Originally Posted by Ancient Mariner

The shafts on which you are commenting have no relevance to what is being discussed that is MSA to LT230 .These shafts transmit torque only where the series shafts have to contend with torque as well as the side loading imposed by the gears.The notch in the outcast shaft while not good practice is probably not a problem as it close enough to the bearing and the RPM not great Any misalignment issues are more likely to be caused by the two locating dowels on the TC which would be better replaced with a register.I have no doubt you will do your own thing and hope it works for you

Noel

An awful lot of negative comments, immediately before one of the adapter shafts breaks

Originally Posted by Lotz-A-Landies

Sorry to rain on the parade and I feel for Vern, however this is the very issue I was indicating when I discussed replacement mainshafts. But seemed to get flamed for suggesting the notion.

What happened to Vern's shaft is just as likely to happen to a custom mainshaft.

However instead of a quick job to replace a broken adaptor shaft you instead need to pull the gearbox to bits.

I like to minimise the number and complexity of custom components in a vehicle I take to remote locations. Especially critical components.

That is exactly my thoughts on this ben. If i could just remove the pto cover, remove the input gear and swap the shaft over would be so simple.
But no, i have to remove the transcase whilst laying in the dirt at a campground.
What could be a 1hr job, has now turned into a 5-6hr a job.

Originally Posted by Vern

That is exactly my thoughts on this ben. If i could just remove the pto cover, remove the intermediate gear and swap the shaft over would be so simple.
But no, i have to remove the transcase whilst laying in the dirt at a campground.
What could be a 1hr job, has now turned into a 5-6hr a job.

...and if it was a custom mainshaft that broke you would have already called RACV Total Care and arranged for the rangie to be shipped back home.

Look on the bright side Damien, there are MUCH worse places than Tassie east coast to be broken down, and you still have Aulro providing support, entertainment and replacement parts

Steve

To right steve, i would have burnt it to the ground😊
Actually didn't bother calling racv, just want to fix it and get back on the road and keep on moving.

Will go back to camp soon and remove it all.

Originally Posted by Vern

To right steve, i would have burnt it to the ground😊
Actually didn't bother calling racv, just want to fix it and get back on the road and keep on moving.

Will go back to camp soon and remove it all.

Just play it nice and safe. No point having an accident and ending up with a face full of LT230 or a crushed hand taking shortcuts without your normal gear at hand...

Steve