Toyota LC 70 series gear ratios

It was taken from what was a very positive review article in Overlander magazine about candidates for 4wd of the year . The reviewer noted some dissatisfactions, one was this issue of 5th gear performance. What has been your experience with this vehicle?

I have a 200, and those sort of revs are a huge difference as mine at 100ks is doing 1600rpm which is too low.

steveg0511
Always remember a magazine is written by a journalist and nothing they write should ever be believed without thorough checking.
If you have the gearbox ratios off a flyer etc it can be worked out if you also know the tyre size.

In your case the overdrive ratio, the diff ratio and tyre size is the three things you require.

Ross M

I agree with you regarding the 200 series. I don't think mine had ever held on to 6th gear. I fitted a replacement valve body and Toque converter lock-up kit from Wholesale Automatics and it made a big difference.
Do you find the 70's higher working rev,s in 5th gear an issue or am I jumping at shadows?

what sort of difference did it make steve?
I kind of disagree with you guys, software is probably ok but diff ratios are too low.
If instead of 1600 it was doing say 1800 in 6th at 100 or so it would be much better

Hey Fisho, before the tranny mods I would do 1600 rpm @ 100k if I could get into 6th and that almost required the planets to align because it would go down to 5th or the torque converter would constantly cut in and out which almost feels like a gear change. this was particularly annoying when towing
Firstly I tried the Toyota software patch and that helped but didn't solve the issue
After the tranny mods revs went up a bit to 1700/1800 but she held 6th endlessly changing down much more sensibly. The T/C lockup stopped the converter cutting in and out. Economy improved when towing by 1-1.5 litre per 100 k's and by a bit more when unladen.
The other advantage of the L/C lockup was much improved low speed engine braking when "off road"

steveg0511
After the transmission mods were done it must have just locked out the T/C clutch from working. No other way to be in 6th and have more revs, unless the box was pulled apart and different planetary ratios inserted..

If the T/C clutch is closed ie driving , then the revs will be the lowest in 6th not up to 1700/1800.

Torque converters don't cut in and out. it is the T/C clutch which cuts in or drops out.

Was going to say the same ross. A bit like the bloke a while back whose car ran at lower rpm after an exhaust swap

fisho64
That exhaust effect must be also connected with torque converters too it seems.

I read a lot of things people have written and not sure they know what they've got when someone else modifies their vehicle.
With all the mods to lockup clutches, (The fashion ) which are small clutches in a torque converter, I often wonder how long they last when being asked to work much harder than intended by the manufacturer.

Agree Ross, the lockup clutch in any auto, actually make that most autos, was designed to remove converter slip when at cruising speed, not to take full engine braking or max HP (KWs..lol).
As far as the different engine speeds between a 70 series which is a manual 5 speed work truck and a 200 series Toorak Tractor with an auto 6 speed and the two top ratios being overdrive and probably a lower numerical diff ratio I am not surprised. The 200 series was designed with a different market in mind. IMHO still a good tow vehicle for someone who knows how to manage the auto box rather than just stick it in D and let the box hunt up and down ratios and the lockup clutch getting a damn good workout.
Comfort??...no contest..lol.

Cheers
Pop

Pop
Almost all people would be amazed if they saw a normal clutch plate and the CD sized(no music) clutchplate out of an auto torque converter.
I think they would hesitate with the switch.

The Toyota software may be in tune with the clutch plate size after all.

Maybe "D" is for Damned Good.
Why are people comparing two entirely different vehicles,as mentioned, made for different purposes.
Only common really is Toyota is the maker.

olcoolone just using the word gearbox shows you know very little about what you are talking about, the 200 series has a 6 speed auto transmission not a 6 speed gearbox.

The 200 series is also a twin turbo were as the 70 series is a single turbo, my 200 has never come close to those revs (2500-3000rpm) at 100 kmp on any hill, and at 130 kmp the revs are at 1800 rpm.

People should research and know what they are talking about before posting on a public forum, should you ( steveg0511 ) have any questions with your Toyota then I suggest you give ( TOYOTA ) the (EXPERTS) on them a call.

"should you ( steveg0511 ) have any questions with your Toyota then I suggest you give ( TOYOTA ) the (EXPERTS) on them a call."

but maybe learn to speak Japanese first and ring there.
Aussie you obviously havent tried that-you'd get a blank look if you asked a technical question in Aus Toyota workshops.
Try asking to have your transmission fluid changed and see what happens

QUOTE"olcoolone just using the word gearbox shows you know very little about what you are talking about, the 200 series has a 6 speed auto transmission not a 6 speed gearbox."

LOL LOL ROLF...... whatever.

What a waste of space you are!

BTW, Meaning of gearbox
"a metal box that contains the gears of a vehicle, or the system of gears itself"

Have a look here and LEARN.

http://en.wikipedia.org/wiki/Transmission_(mechanics)

So the 200 series doesn't have gears in that box?

A "transmission" can also be a radio or television transmission.

The term gearbox is used for purposes of describing something which has a gearing system in it.

Yeah Ross, there are many names used and they all mean the same.... yes they all have to have gears inside them to be called a "gearbox".

Last time I pulled an auto box apart they had gears in them!

The only real transmission in automotive is the CV trans, everything else is a gearbox inc diffs and even steering boxes...

Transmission can refer to the whole drive train and not just one specific component.

The only difference between a manual and automatic box is one you change gears manually and the other does it automatically, both have gears sets and are much the same.

Then you have to auto shift over manual box like the Road Rangers and the VW DSG box thats two manual gearbox in one with automatic pre selectors and automatic clutches that select two gears at once aiding in a fast shift...... so really it's an automatic manual. LOL

you happy with how it "feels" @ 2300rpm?
How do you find it for engine noise? and extra pull power when needed?
what was it like before the chip and 3" tubes?

Hi Steveg

Yeah I was concerned about noise at those rpms (coming from a D4 HSE), got use to it pretty quick, But I do call it the truck.

3" went on staight away, so cann't really tell
Chip it was well worth it, pulls the van much smoother in 5th.

I have no regrets, I love my truck

Cheers Ken

Thanks Alby. You've given me what I was looking for,a users opinion on the on road 5th gear performance of the LC. Appreciate your input

Steve from memory I dropped 150 to 200 RPM at 100KPH changing to 33's