Marks Adapters Reduction gears in 60 transfer???

[KERMIE_308]

oryt my rig is an FJ40, 60 series diffs, 60 series power steering, 2" leafs, 2" shackles, 2" body, 4 speed box (40 or 60 i dont know) 60 transfer case, twin air lockers, worked 308 red motor with 37" TSL Boggers

Since i done all these mods everything has improved on road. i sit on 90 - 100km in 3rd!!! when i change into 4th the revs die, to keep 4th happy i need to do about 120km. this doesnt really bother me, where i suffer my Low Range!!!!!

1st gear in low range is a joke... the thing is way to fast. i have to fry my clutch to even attempt a hill climb or to keep the engine on i have to hold on tight and hit every bump at quite a speed. Now im pretty sure its mainly because of tyre size, but it could also be diff ratios and maybe the V8 either way i need to do something.

Mark adaptors have 4 options in reduction gears. Option for is for cars with tyre size 35" or bigger and had a reduction of 55% in low and 8% reduction in 2WD.

so has any body got reductions gears???
are they any good??
will 55% reduction be enough in my case???
is there other options besides mark adaptors???

any advice or info would be greatly appriciated as ive built a bad ass 40 that is no good off road.

[mmaaxx]

fit a marlin crawlbox dual transfer instead in frint of your standard transfer -



http://www.marlincrawler.com/transfer-c ... rawl-boxes

[flyology]

I had a set of Marks reduction gears in my 60, took them out almost straight away as they were too loud for a daily driver. (they whined like mad!) They have modded them since the set I bought, putting tapered bearings on the Idler gear shaft, not sure if this has helped with the noise.

I don't think the marlin crawler boxes are made to suit the H55F or H41 tojo boxes, I think at this stage they are only available for Hilux Forunners and Surfs.

You might have to change diff ratios or get the Marks gears and take a chance on the noise, or bite the bullet and go with a different gearbox and transfer case like SM420.......

[crustybj60]

you CAN get a toybox for H55F or H41/42 cruiser trans, i have one .
problem is marlin has NONE in stock, and who knows when they will have more.

you could look at replacing with and orion t-case. http://www.advanceadapters.com/

cruiser gearing options=$$$, so get ready to spend some money.

the marks gears are little gain for the $$$ IMHO, for a bit more you could go doubler.

re-gearing the diffs will help as well. think 4.88's

cheers
crusty

[KERMIE_308]

Fisrt i just want to say thanks for your quick replies and good info!!!
im new to this forum thing and so far so good!!!!

Yeah i heard they had an annoying wind noise... with the new design and thick oil they reckon it reduces the noise, but who knows how much.
Also yeh your right the 55% reduction doesnt sound like enough to me for the price.

Yeahhh well if it works out that i have to change my box thats not a problem but i wouldnt mind using my TH400 auto with B&M shifter ive got in the shed which obviously bolts straight up to the 308 but will that then limit my options even more???
i can get and adapter from TH400 to pretty much any transfer case.

but whats a good one??? whats the SM420??
the thing is with the 60 diffs being of centre to the right it limits me to what modern transfers i can use...

I looked at the orion T-case and they are out of stock too. Is the t-case a dual kit as in bolts to an existing transfer or on its own???

as for re-gearing the diff centres i want to save that as a last extra reduction option...

[crustybj60]

looks like you'll have to make a list of all the options and combinations, to compare cost/effort and results.
add everything up, like propshaft mods, new crossmembers, axle replacement etc... you'll quickly get a good idea of what it will cost.
most common transmission ratios can be found on the interweb, you should be able to find all the numbers/specs. to help you make your decision.

orion will replace your cruiser t-case and keep the offset for your axle.

atlas will also replace the t-case, but has center rear output.

you will have more options with a centered rear diff.

sm420 and sm465 are GM 4speed trans, i have no idea if they would be common or cheap here in Australia. very low 1st gear.
4.88 diff gears would tame those 37's back to "about" stock low range, and that's not so low...

search search search and read... it may take you some time to decide what you want to spend, as to what you will get.

try a search at www.ih8mud.com there is good info there too.

HTH'S
cheers
crusty

[TWISTY]

Went through all this recently for sorting what gbox and xfer to run with the 5l v8 which will be going into my FJ40.

Ended up buying a Rover ZF Auto and LT230 xfer case (drivers side drop).

The LT230 has a low range ratio of 3.321:1, lower than any of the Marks gears. High range also has a reduction in some models, which i think is up to 1.2:1.

They are constant 4x4 but, so will need a part time kit fitted. I haven't looked into this.

If you need lower again, a range of transfer case gears can be bought for the lt230, at almost half the cost of the marks crusier ones.

I'm told the LT230's are easy enough to make adapter plates for, so you could make up something to bolt up to your original 4spd. Or adapter it to your TH400 auto.

Have a look in my build thread (link in my signature) for some other details, and these two as well.

http://www.outerlimits4x4.com/phpBB2/ft ... highlight=
http://www.outerlimits4x4.com/phpBB2/ft ... highlight=

[KERMIE_308]

OH MY GOD.... there are way to many options!!!
and it doesnt help that i have no idea about the ration numbers you guys a giving me... jus t dont know what the numbers mean....

but what i cant see is that to keep as much of my existing components the Marlin Crawl Box and the Orio Tranfer Case are the 2 bolt on options i have. Im leaning towards The Marlin and 2 tranfer cases will be AMAZING

how can i tell if i have a H55F or a H41/42 gearbox ????
also what is my transfer case model?? its identicle to the Orio Transfer case if that helps...

Crustybj60
if you dont mind me asking how much was the Marlin Toybox????
how easy was it to fit??
do you now have 2 transfer case levers???
what is the Marlin Crawler model/part number??
is this set-up amazing off-road in low range like i think it would be????
do you have any pics??

sorry to throw all these question at the mate but your set-up sounds the way to go for me...

[crustybj60]

from your first post i would guess you have a 40 series trans/transfer set up.

if your t-case looks like the orion, it's an early 40/55 t-case. later 40 and 60/70 series have a "split" t-case. i would guess you have an H41 trans.

H55f=5spd

different years of 4spd trans have different output spline count, 16 and 19.

pm your email and i'll send you more info on install/options
cheers
crusty

[mmaaxx]

heres a pic of a Marlin Crawl Box fitted to the front of my factory chain drive transfercase -



fitted to the vehicle -


and the extra stick in the console -

[TWISTY]

OH MY GOD.... there are way to many options!!!
and it doesnt help that i have no idea about the ration numbers you guys a giving me... jus t dont know what the numbers mean....

but what i cant see is that to keep as much of my existing components the Marlin Crawl Box and the Orio Tranfer Case are the 2 bolt on options i have. Im leaning towards The Marlin and 2 tranfer cases will be AMAZING

Quick explanation for the ratios numbers. It is the input vs. the output.

So say for 3:1 - The input side of the gearbox,transfer case, or differential will do 3 complete turns for one complete turn of the output.

So the higher the number on the input side, the slower the output will turn.

You can then multiply the ratios together of 1st gear ratio in your gearbox, the low range ratio in your transfer case (or cases), and finally your diff ratio to give you the final crawl ratio.

Some examples of the gearing options listed above are below. These are with keeping your current 4spd manual.

You current stock crawl should be.
H41 1st gear ratio 4.843 x Low Range Ratio 1.963 x Diff Ratio 4.1 = Crawl Ratio of 38.98. (so your engine will need to do 38.98 revolutions for your tyres to do 1 complete revolution.

1)Adding a marlin crawler box in front of the std. transfer case (assuming both have the same 1.963 low range)
4.843 x 1.963 x 1.963 x 4.1 = 76.51 crawl ratio.

2)Adding a Orion Case with its 4.0 low range ratio.
4.843 x 4.0 x 4.1 = 79.43

3)55% reduction marks adapters gears
4.843 x 3.05 x 4.1 = 60.56

4) Adapting a LT230 rover transfer case
4.843 x 3.321 x 4.1 = 65.94

[KERMIE_308]

Ohhhhhh ok now i get it.... thanks twisty
thanks for the option break down too... made it to easy

well i now knwo that the marlin comes in a 4.70:1 so if i was to get this my crawl would be...

H41 1st gear ratio 4.843 x Marlin Crawl box 4.70 x Low Range Ratio 1.963 x Diff Ratio 4.1 = Total Crawl Ratio of 183.20

so at 183 revs of the motor to 1 rev of the tyres... its going to be a crawling beast!!!

where can i get info on the H41 and H42 gearboxes??? once i confirm which i have i wouldnt mind know the ratios of all the gears now that i know what they mean...

also thanks again for taking the time to explain all of this to me. Makes me wish i joined this forum a long time ago...

hope to hear from you
Joey

[TWISTY]

No worries.

Best link I've found for finding out ratios of most toyota transmissions and transfer cases.
http://www.cruiserfaq.com/08-01.php

[KERMIE_308]

Ohhh 2 good!!!!

thanks.

[andyjim243]

lovin those t/cases mmaaxx, awesome!!

[hulsty]

Another important factor is what kind of driving do you do? I looked at gearing options for awhile and none represent "value" especially the Makrs gears for the driving that I do.

I have a H55F that had 1.9 ratio low range and 4.11 diffs. The best value solution I found was to fit the low range gears from a different model cruiser. Now I have 2.3 ratio low range gears, cost be $175 plus installation and they are factory Toyota. I run 35'' rubber and with these gears overall gearing works out about the same as when my car was new on 31'' rubber OR if I had changed the diffs to 4.88 diffs. As a comparo my mate has 83% reduction gears in his GQ patrol, his gearing is now pretty much the same as mine.

Off road they are awesome!! I can crawl along in low 1st, or take off on a steep hill in low second. Car tops out at about 55km/h in low range in 5th gear.

[TheBigBoy]

I was going to mention diff gears aswell as. And what size rubber he was running. Im running 35's on my cruiser. And have 4.56 diff gears and 45% reduction gears (manual gear box). Makes a big difference matching the 2. Mine is perfect now.

[crustybj60]

twisty, right on the money with that!
with a toybox (4.7) and auto t-case gears (2.28 IIRC) and some diff gears.

4.84 x 4.7 x 2.28 x 4.88 = 253.1

top speed would suck with 4.88 diff gears and 4spd.

find yourself a set of NA market 3.73 (cheap, plentiful and strong) diff gears and get better top end. i'm sure a V8 has the jam to push 35" + with deeper gears.

the nice thing about a doubler is that you can use it alone or doubled, effectively gives you 4 usable gear range options

4.84 x 4.1 = 19.8 high range first gear

4.84 x 1.96 x 4.1 = 38.8 stock low first gear

4.84 x 4.7 x 4.1 = 93.2 toybox " "

4.84 x 4.7 x 1.96 x 4.1 = 183.1 double " "

cheers
crusty

[KERMIE_308]

Yeahhh definately the doubler!!!!!!!

yeah thats right crusty.. 4 gear options also on top of that if theres ever a need for me to go extreme, i could even add reduction gears to my standard transfer or add an Orion T-Case which is compatible with the Marlin Toybox...

Ive got onto the guys at Marlin, just waiting to see how long it will take to get me one!!!!!

[vk7ybi]

Anyone want to get an Orion in with me for a freight saving? Its going to cost me ~$900 to get one here..

[locktup4x4]

Anyone want to get an Orion in with me for a freight saving? Its going to cost me ~$900 to get one here..

I called on Friday and I was told the Orion's are out of stock until May or June. Im thinking of putting one in my cruiser.

Jason

[vk7ybi]

I priced one when the dollar was good back in November, they had them then.. Just assumed they still had them now.. ):

[KERMIE_308]

Yeh i was told june aswell...

how much did they price you Jason ????

[MrGrim]

just for a matter of interest the early 40transfer is call J30 or j38 there where 2 main types the number is the idler shat j30 =28mm j38 = 40mm

i know as i had trouble getting a rebuild kit for mine its a j38 military grade heavy duty 40mm shaft with 35mm wide gear teeth oh and i belive stock teeth are 22mm wide and cut and a more corse angle

[hulsty]

yeah thats awesome, any more info or pics of the heavy duty case and gears? I've never heard of them before, I know there is a HD version of the H55F around