HJ40 Gearbox into a HJ60

[KrEeCha]

Hi guys.

I am planning a build at the moment and I want some really good gear reduction to run 39's.
I have been looking around the net for months now and have come across the Klune-V (Klunev.com (http://www.klunev.com/page_toyota_landcruiser.htm)) underdrive, and I think I would like to use one in my 60-series ute.

At the moment however Klune-V does not offer an under-drive to fit a 60-series 'long' 4-speed. Therefore I need a 'short' 4-speed to fit in my truck.

I hav found this information but I need to know if anyone out there in interminet land has any further info?

I was told that all of the gear boxes basically from 1970 to 1989 had the same bolt pattern onto the bell housing and input shaft (as long as I stayed with diesel gearboxes), etc, so you can mix and match these up to fit. Is this true? (do the petrol's have the same input shafts?)

The top of the gear box is removable. That is the whole top loader/selectors/gear stick. The 60 series Land Cruisers have a shorter gear stick than the 40 series, and it is located further back on the top loader section. I can put the 60 series gear stick etc on the earlie box.Next is the hand brake. On the 40 series, the handbrake is a transmission brake on the rear output shaft of the transfer case; on the 60 series, the handbrake is on the rear wheels. However I am using a 60 series split transfer case which will fit the Klune-V. So I am therefore planning on using a line lock in the rear brake hydraulic line as a hand brake, so that I can use my 80 series dif, and not have (mud grabbing, shitty) diff mounted hand-brakes.

Any help will be massivley appreciated.

Cheers Davo.:thumb:

[dakar61]

I`m more experienced with diesel engines than transmissions, but because I more or less did the same thing as you with my HJ47 troopy, I`ll try to help..

The 70 to 89 petrol input shaft spline is coarse, the diesel, fine spline. (Actually I dont think Toyota produced 4 speeds in the Cruiser until 1974. The case of the 3 speed had a smaller bolt pattern also I think, but the diesel boxes where only ever 4 or 5 speed anyway)

The diesel input shaft lengths varied also. I think if the box was bolted to a B series engine the shaft was longer than if it was bolted to a H or 2H engine, due to the longer bell housing on the B`s.

As for the handbrake, my 47 series had a split transfer case like the 60 but also had the handbrake assy mounted on the transfer case. Couldnt you do it this way too? I think you would just have to change the seal/speedo-drive/handbrake carrier over from a 47 transfer to the 60 transfer. It would be better that relying on a hydraulic line-lock, which I dont think is legal anyway.

Hope this helps...

[KrEeCha]

Thank-you for the reply champ.:thumb:
First things first, with my build it will not be a road legal truck it is just a hobby vehicle.
So I do plan on having hydraulic hand-rake just to keep things simple (and the have less crap collect mud).:p

Anyway, what do you mean fine and coarse spline?
I do have a spre garbox sitting on thefloor, and I believe it is a 5-speed from beind a 2H, it has a 10-spline input shaft.

Do the H and 2H have the same bellhousing input shafts?

Thanks for the info :)

[dakar61]

No worries kreecha.

Once again this is not my field of expertise, but the petrol input shafts (of the era concerned) have a spline width of about 8mm or so and the diesel splines are only about 3mm wide.

The 2H bell housing is one piece aluminium and the H is a two piece setup in cast iron. From memory the H housing is shallower than the 2H so I`d assume the input shaft would be shorter for that application.

[KrEeCha]

thanks for the info dakar.
I have also done some more research and found out that the short and long 4-speed have identical bellhousing to input shaft mounting and clearances. I just now need to find a short 4-speed. (with fine splines:D)