Outer Limits 4x4 Board

Hello chaps!!!!
new to this forum.

I've got a landcruiser Bundera (lj71) with a R151 gearbox behind a 2l-t engine, the gearbox has got unbelievable noisy and thinking about it, I want to up the gears a bit more so I go a bit faster and my fuel economy improves as well....

so I need some info about what high gear Toyota gearbox or (hopefully) 6 gear one would bolt to my engine or if not, what diffs I'm I able to fit.

My toyota is on 4 coil springs and has ( I think ) 4.88 diff ratios.

sorry about asking so much the first time but please help, I dont want to go driving for hours to find the wrong parts.

cheers

JC

avalanches wrote:Hello chaps!!!!
new to this forum.

I've got a landcruiser Bundera (lj71) with a R151 gearbox behind a 2l-t engine, the gearbox has got unbelievable noisy and thinking about it, I want to up the gears a bit more so I go a bit faster and my fuel economy improves as well....

so I need some info about what high gear Toyota gearbox or (hopefully) 6 gear one would bolt to my engine or if not, what diffs I'm I able to fit.

My toyota is on 4 coil springs and has ( I think ) 4.88 diff ratios.

sorry about asking so much the first time but please help, I dont want to go driving for hours to find the wrong parts.

cheers

JC

On the Toyota manifactures plate 5th line down it will have
R151 G###
If you let me know the G code numbers We will know what the diff ratio is
What size tyres do you have fitted
In my 4runner I have fitted the R151 and modified the over drive from 17% to 30%. I have a V6 conversion that will handle the extra overdrive

Adrian

toyrex wrote:

avalanches wrote:Hello chaps!!!!
new to this forum.

I've got a landcruiser Bundera (lj71) with a R151 gearbox behind a 2l-t engine, the gearbox has got unbelievable noisy and thinking about it, I want to up the gears a bit more so I go a bit faster and my fuel economy improves as well....

so I need some info about what high gear Toyota gearbox or (hopefully) 6 gear one would bolt to my engine or if not, what diffs I'm I able to fit.

My toyota is on 4 coil springs and has ( I think ) 4.88 diff ratios.

sorry about asking so much the first time but please help, I dont want to go driving for hours to find the wrong parts.

cheers

JC

On the Toyota manifactures plate 5th line down it will have
R151 G###
If you let me know the G code numbers We will know what the diff ratio is
What size tyres do you have fitted
In my 4runner I have fitted the R151 and modified the over drive from 17% to 30%. I have a V6 conversion that will handle the extra overdrive

Adrian

How did you modify the overdrive. Marks adaptors have a kit, but a bit $$

I've got 4.78 diffs and 31" tyres

I do not know what you have in the UK in the landcruiser range

HZJ80 10x41 4.1 ratio
HZJ75 9x37 4.111
100 10x43 4.3

The front diff out of these are hi pinion to fit the front of the Bundy
Some Bundera,s in Aus also have 4.556 ratio
I am in the prosess, with drawings of fitting the T56 6 speed onto the Hilux gear drive transfer case, I have already done the bell housing to fit T56 onto the Commodore V6
5th and 6th gear are both over drive

How did you modify the overdrive. Marks adaptors have a kit, but a bit $$[/quote]

I fitted the over drive gears from a Dyna truck
I did this of my own research

the plate sais:

C/TR/A/TM 3H4 FG40 G145 R150F

tire size 31"

toyrex wrote:How did you modify the overdrive. Marks adaptors have a kit, but a bit $$

I fitted the over drive gears from a Dyna truck
I did this of my own research[/quote]

Yes I too looked at marks, too muchb $$.

Can you give further details on your mod?

avalanches wrote:the plate sais:

C/TR/A/TM 3H4 FG40 G145 R150F

tire size 31"

Diff G145 4.875 ratio 4 spider LSD
Gearbox R150F 3.86 1st gear and 17% over drive

yep, tahts the one, now, what's the next step?
what could I do to get lower rpms?

avalanches wrote:yep, tahts the one, now, what's the next step?
what could I do to get lower rpms?

with 4.556 diffs engine revs should be ABOUT 3400
4.3 3100
4.1 2850

also 33" tyres

is there any toyota 4.1 or 4.3 diffs?
if so, which one could I fit, would it require a lot of mods?

thanks
J

refer to my second reply
I know of 15 different ratios for the Hilux and Bundera around the world
With ratios from 3.07 through to 6.8 all are a direct bolt in

I thought your option it's increasing the tire size or downward the axle ratio ..

You have factory Toy at least 4.11 and 4.56 ..

thanks for all the info, I'll see what i can get on it then

cheers

yo, toyrex, what toyota model has the the diffs I'm looking for, for example, 3.8, 4.1, etc?

You are searching for LJ-70 with 2L engine, usually those come here with 4.88 anycase check the info in the firewallplate ..

Tapage wrote:You are searching for LJ-70 with 2L engine, usually those come here with 4.88 anycase check the info in the firewallplate ..

My LJ70 started life with a 2L engine. I can confirm the diffs are 4.88 ratio.

avalanches wrote:yo, toyrex, what toyota model has the the diffs I'm looking for, for example, 3.8, 4.1, etc?

If you are looking for 4.1 diffs you need to find a landcruiser fitted with the 1KZ engine. LJ78 was my halfcut model, with 1KZ, R151F and 4.1 diffs.

I have the 4.1 diff ratio parts spare....pity you are so far away. Although I put on the new axles I kept the ratio at original 4.88.

thanks 4 ur help mate!!!

avalanches wrote:thanks 4 ur help mate!!!

There's a small site operating in UK, a few of them have lj70's

blessedarethefew.com

gotoy wrote:

Tapage wrote:You are searching for LJ-70 with 2L engine, usually those come here with 4.88 anycase check the info in the firewallplate ..

My LJ70 started life with a 2L engine. I can confirm the diffs are 4.88 ratio.

A 2l and a 2l-t are a bit different .. I would assume your 2l would have a g52 or a W series box.

love_mud wrote:

gotoy wrote:

Tapage wrote:You are searching for LJ-70 with 2L engine, usually those come here with 4.88 anycase check the info in the firewallplate ..

My LJ70 started life with a 2L engine. I can confirm the diffs are 4.88 ratio.

A 2l and a 2l-t are a bit different .. I would assume your 2l would have a g52 or a W series box.

Yes. Original configuration was 2L, g52 and 4.88s. I then changed out the G52 to 5sp R151F and later a 2LT. Lately installed 1KZ and R151F, although to date I kept the 4.88 diffs.

toyrex, How much stronger is the t56 over the dyna box

avalanches wrote:yo, toyrex, what toyota model has the the diffs I'm looking for, for example, 3.8, 4.1, etc?

As I said before I do not know the ratios of your Toyota range in the U.K.
In Aus a 4.1 hi pinion to suit the front of your Bundera would come out of the front of a 80 series Landcruiser
4.1 for the rear would come out of a 2wd ute or a Hiace van
You will need to check with some wrecking yards or your Toyota dealer for a diff comparison chart etc

As stated above, lj series with 1kz manual engine. They were availablenin Europe, otherwise try the importers.

I have what you want, but I am a long way away.