4 to 5 speed gearbox swap ln46r "L" 2.2l diesel

[Shane Tharme]

Hi. I used to own a rn105 hilux. 5 speed & loved it. A few cars later i have a 1981 ln46r 2.2l diesel & love it more. The only downside apart from needing a turbo & a straight through exhaust (i have future plans for this) is it has a 4 speed gearbox &  whilst traveling down the freeway at 100kms/hr its reving at 3500rpm & red line is at 4500rpm. It really needs another gear. Which 5 speed box should i use to fit my "L" motor? Any help is much appreciated. 

 

Pic is to show my lux. Just finished sorting out the rust. 

[Beigeute]

Shane, I'm not sure if you still are wanting to know as my reply is late. You probably already know that a Celica 5 speed gearbox fits directly into the LN40 Hilux. I think there are two types of Celica gearboxes, a steel one and an aluminium one but I'm told that only one type fits. I can find out which one if you like. Ever since I purchased my Hilux in 1983, I immediately put a reconditioned Celica gearbox into my ute. To be honest, over the years I've had quite a few troubles. What happens eventually is it jumps out of 5th gear. I've solved the problem by getting one from the wreckers but I'm told that in Brisbane there is a gearbox specialist who is able to recondition the boxes instead of getting one from the wreckers. There is no doubt that it sure needs that extra gear. If there were a 6 speed box available, that would be even better.