Outer Limits 4x4 Board

Yes, I searched.

My brother has a diesel 80 series, which he actually uses offroad (Cape York, Kimberly, Simpson, Anne Beadell...) But he's still running 31x10.5R15 Bridgestone Desert Duellers, and gets punctures where the rest of us (various 16" sizes) don't.

He's happy to buy 16s (money is not an issue) but he wants his speedo to be accurate - so he's not keen to go 265/75-16 (nominally a 32").

He reckons he's currently within 1% at 100km/h, and doesn't want to lose that. So he doesn't care that 32s would only be about a 3% change - it's too much.

I know there are electonic adjusters available, but I wouldn't be happy with that myself, so I'll have trouble selling the idea to him. I've seen some mention of replaceable gears to correct the speedo, but not sure how big a job this is.

Can anybody supply some part nos, and/or rough idea of how hard to replace?

Thanks,

Scott

Scott
if he gets a petrol spedo face and places it over the diesel spedo, he will get a 10% speed up and can then run 35's. Another great idea is to put the gear out of a later 80 in the transfer, it has one more tooth, and spins slower as a result. Temember, pre 8/92 had cable and cant be corrected electronically
Andrew

Ive got 265/75/16s on my 96 and the speedo is spot on. It runs axactly the same as my Garmin Streetpilot's speedo.

How different is the cable speedo drive on the early 80 series to the 60 series? did all the early 80 series come with 15 inch wheels, were the 16 inch rims an option on the early models? If they were an option, was there a difference in drive gears??

(wondering if speedo correction can be done for a 60 series using 80 series drive bits....)

Hi Scott

I have an 80 and use the Marks adaptor and it just works, when I went from 33s to 35s I just opened the box and changed the switching and away I went. It is a very simple bit of electronics.

have fun

Craig

RUFF wrote:Ive got 265/75/16s on my 96 and the speedo is spot on. It runs axactly the same as my Garmin Streetpilot's speedo.

Thanks Tony - is yours a diesel too?

Dad's got 265/75-16 on his Prado - factory steel rims. Will they bolt onto the 'Cruiser to take it for a test run?

-Scott- wrote:

RUFF wrote:Ive got 265/75/16s on my 96 and the speedo is spot on. It runs axactly the same as my Garmin Streetpilot's speedo.

Thanks Tony - is yours a diesel too?

Dad's got 265/75-16 on his Prado - factory steel rims. Will they bolt onto the 'Cruiser to take it for a test run?

No mines a Petrol and because its a late model it came factory with 16" rims. The Prado rims should bolt straight on. Offsets may be different and just make sure they clear the caliper before driving it.

-Scott- wrote:

RUFF wrote:Ive got 265/75/16s on my 96 and the speedo is spot on. It runs axactly the same as my Garmin Streetpilot's speedo.

Thanks Tony - is yours a diesel too?

Dad's got 265/75-16 on his Prado - factory steel rims. Will they bolt onto the 'Cruiser to take it for a test run?

Prado bolt straight on, they are 1 inch less wide, but thesame backspace as the 80 rim...

-Scott- wrote:

RUFF wrote:Ive got 265/75/16s on my 96 and the speedo is spot on. It runs axactly the same as my Garmin Streetpilot's speedo.

Thanks Tony - is yours a diesel too?

Dad's got 265/75-16 on his Prado - factory steel rims. Will they bolt onto the 'Cruiser to take it for a test run?

One more thing, the prado had 265x70 std (not 75) these are smaller than the 75...the 265x75 is equivalemt to the 275x70 std cruiser grandtrek

dow50r wrote:

-Scott- wrote:

RUFF wrote:Ive got 265/75/16s on my 96 and the speedo is spot on. It runs axactly the same as my Garmin Streetpilot's speedo.

Thanks Tony - is yours a diesel too?

Dad's got 265/75-16 on his Prado - factory steel rims. Will they bolt onto the 'Cruiser to take it for a test run?

One more thing, the prado had 265x70 std (not 75) these are smaller than the 75...the 265x75 is equivalemt to the 275x70 std cruiser grandtrek

OK - perhaps you know something I don't.

The man who claims to be OUR father has 265/75-16 on HIS Prado.

Check this out,
http://www.marks4wd.com/products/tyre_m ... ction.html
I have one of these fitted, just with a flick of teh switch, once you've taken 10 minutes to set it up and you can flick the speedo to read correctly between your 31 inch highway tyres and the 38 inch play tyres. AND works for all tyres sizes. I can not distinguish any difference between the speedo and GPS, wiht differing tyres sizes, just flick to another program in the "little box".
Juz

what about the make it yourself units from jaycar.$49.95 for the correction unit and $3.50 for the box

Dragging this post up again because Im getting new 285/75 tyres in two weeks. I've got a 97 HZJ80, so what are some options for correcting the speedo to suit these tyres?

You can change the speedo driven gear in the transfer case.
That was the only change they did from 15in to 16in rims.
you can buy it from toyota, it comes with a new seal aswell.
Its easy to do, just pull out the speedo drive out of the transfer case, pop of the cir clip, push the speedo drive shaft out , replace the seal and replace it with the 16 inch version, refit cir clip refit to car.
Under 30 mins all done, hardest part replacing the seal

mine already has the 16" gearset as 16" was standard on my cruiser

Get one of those electric tuning devices the other have talked about

Well I've just finished installing the Jaycar unit on my 80. For anyone thats interested I've made write up on the install, have a look at this link http://www.offroad80s.com/viewtopic.php?t=482

It works a treat and can be set within 1% up to 99%(thats some big arse tyres )

As abit of an add onto this, is a mounted GPS legal as a speedo??
if you were to run 35s in an fj40 and needed it engineered what speedo options are there?
with dual GQ transfers and a TH400 with 80 diffs?

any ideas??

DIRTY ROCK STAR wrote:As abit of an add onto this, is a mounted GPS legal as a speedo??
if you were to run 35s in an fj40 and needed it engineered what speedo options are there?
with dual GQ transfers and a TH400 with 80 diffs?

any ideas??

Probably not.. go under tree cover, into a tunnel, even in a 'canyoned' urban environment you could drop all your sats and suddenly have no speedo.

GPS itself is extremely accurate, probably better than your average radar gun, but can drop out to easily to be relied apon.

Id be searching for a speedo company, there is a place near me in ringwood, but that doesnt help you out, let your fingers do the walking prob

shanegtr wrote:Well I've just finished installing the Jaycar unit on my 80. For anyone thats interested I've made write up on the install, have a look at this link http://http://www.offroad80s.com/viewtopic.php?t=482

It works a treat and can be set within 1% up to 99%(thats some big arse tyres )

Shanegtr,

The link doesn't seem to work - maybe requires password? Any chance of sending me a PM of the write up or posting it up here?

Cheers.

Dak Dak wrote:

shanegtr wrote:Well I've just finished installing the Jaycar unit on my 80. For anyone thats interested I've made write up on the install, have a look at this link http://http://www.offroad80s.com/viewtopic.php?t=482

It works a treat and can be set within 1% up to 99%(thats some big arse tyres )

Shanegtr,

The link doesn't seem to work - maybe requires password? Any chance of sending me a PM of the write up or posting it up here?

Cheers.

Nevermind. http://www.offroad80s.com/viewtopic.php?t=482

+dj_hansen+ wrote:

DIRTY ROCK STAR wrote:As abit of an add onto this, is a mounted GPS legal as a speedo??
if you were to run 35s in an fj40 and needed it engineered what speedo options are there?
with dual GQ transfers and a TH400 with 80 diffs?

any ideas??

Probably not.. go under tree cover, into a tunnel, even in a 'canyoned' urban environment you could drop all your sats and suddenly have no speedo.

GPS itself is extremely accurate, probably better than your average radar gun, but can drop out to easily to be relied apon.

Id be searching for a speedo company, there is a place near me in ringwood, but that doesnt help you out, let your fingers do the walking prob

yellow pages it is!

Dak Dak wrote:

Dak Dak wrote:

shanegtr wrote:Well I've just finished installing the Jaycar unit on my 80. For anyone thats interested I've made write up on the install, have a look at this link http://http://www.offroad80s.com/viewtopic.php?t=482

It works a treat and can be set within 1% up to 99%(thats some big arse tyres )

Shanegtr,

The link doesn't seem to work - maybe requires password? Any chance of sending me a PM of the write up or posting it up here?

Cheers.

Nevermind. http://www.offroad80s.com/viewtopic.php?t=482

Fixed my original link - dont know how I managed a double http?

shanegtr wrote:

Dak Dak wrote:

Dak Dak wrote:

shanegtr wrote:Well I've just finished installing the Jaycar unit on my 80. For anyone thats interested I've made write up on the install, have a look at this link http://http://www.offroad80s.com/viewtopic.php?t=482

It works a treat and can be set within 1% up to 99%(thats some big arse tyres )

Shanegtr,

The link doesn't seem to work - maybe requires password? Any chance of sending me a PM of the write up or posting it up here?

Cheers.

Nevermind. http://www.offroad80s.com/viewtopic.php?t=482

Fixed my original link - dont know how I managed a double http?

Yeah I should have noticed that!

The kit sounds pretty good. I'll check it out. It's satisfying making it yourself too. I purchased and made one of their dual battery management systems which I'm not sure that they still make. Works well though also.