Thread: Gearbox and Lt230 Transfer Q's - 4BD1-T

Thanks for the everyone's responses.

Ill have to get privy with Grubbs kit. is suited to all Isuzu boxes or type in particular? And is existing tunnel etc still ok to use?

Msa boxes I think.
And Steve, feel free to lend a hand, I've run out of time this year to get it on the road, should have it going though.

Originally Posted by 110Landy86

Thanks for the everyone's responses.

Ill have to get privy with Grubbs kit. is suited to all Isuzu boxes or type in particular? And is existing tunnel etc still ok to use?

As you have the lt 85, you just need the msa box, his adapter, the Isuzu to land adapter ring and some clutch bits I think. You should be able to offload your lt85 and bell housing to recoup some funds.

Originally Posted by Vern

As you have the lt 85, you just need the msa box, his adapter, the Isuzu to land adapter ring and some clutch bits I think. You should be able to offload your lt85 and bell housing to recoup some funds.

I thought that the benefit of using the Isuzu gearbox with the Isuzu engine was that it's all Isuzu truck components, no rare Landie components required?

I have a Isuzu MSB box in my ute. Basically a MSA on its side as in the gear selection is from the side not the top. What I have found is it,to me at least, is a 4 spd box with a low first added. So not much in overdrive. This of course could be the LT230 transfer case ratio. Great stupidly low first but not a high fifth gear at all. Good strong box though and better than the lt95 that was in it. Up side of a marginal fifth gear is I can run 32" or 33' tyres no problem and that gets the revs down a bit in fifth.
Cheers Hall

Originally Posted by 303gunner

I thought that the benefit of using the Isuzu gearbox with the Isuzu engine was that it's all Isuzu truck components, no rare Landie components required?

It is, but you also need an Isuzu truck flywheel, Isuzu truck starter motor, Isuzu truck flywheel and clutch. This is the way I went as I had both so opted for this option. As 110landy86 already has the rover parts, he may as well utilize what he has, unless he can find the truck bits at a good price and can offload his land conversion.

People talk about Grubbs kits like they are available.

I converted my knackered LT85 to an R380 (at great expense) prior to Grubb doing his kits. I really like the R380 though - it is a nice tight, smooth box that is enjoyable to drive. It really changed the feel of the 110 for the better and the later ones are quite strong with many people using them behind 4bd1Ts for a LOT of kms.

That said, if I were to do it again (and grubb was going to do a run of his kits) I would use a grubb kit.. but I've not driven one to judge the feel of them.

Hey guys,

1) I have a rear diff from a 1987 v8 110 which I plan to reco and fit to my 1987 isuzu 110 as my existing diff is said to be super costly to repair (crown n pinion cactus). Question; Will I be able to successfully fit the v8 diff or will the ratio conflict with my existing front diff (ratio)??

2) Also, I have a lt85 with disco type lt230 t/c. Will the ratio be higher or lower than the original/ stock arrangement? I understand that the disco t/c has a taller ratio is this correct? Any first hand experiences with this setup?

Cheers JP