Hilux heavy duty gearbox

[HIL01X]

The gearbox started knocking last night as if a tooth broke off so I limped home in 4th gear. Pulled it apart today and yes there's 3 teeth broken off input shaft & 1 off counter shaft. I've allready replaced counter shaft, 5th gear about 8 months ago but not input shaft so no warranty.
Has anyone used a Marks heavy duty gearbox & how do they go, worth the $2650 or should I just spend the $6-700 and fix the old one again
Going behind 2.8 intercooled turbo, often towing.
Funny thing is it happend exactly 1 year after centre broke out of clutch ,and that was when I was going to pick up the wife after she had pranged the car.
Graeme

[bulldogy]

Hey
Go with a gearbox out of a surf import they have a 23 spline output and are heaps stronger nd a lower 1st gear for crawling.R150F is the 1
Marlin from there BBS rekon they are the tuffest of the yota boxes for the lux.
Bull

[toyrex]

The Marks hd gearbox is a Dyna truck gearbox with a 5.15 1st gear
The R150 has 3.86 1st gear commonly found in v6 4runners
The R151 has 4.31 1st gear in some serfs
The strength of the boxes above are the same as all the internals are interchangable
The G52 gearbox has a 3.96 1st gear
Personaly I cant see how the R150 with a faster 1st gear is better for crawling

I have the R151 fitted with the Dyna 5.15 built myself with internal shift
not the sloppy rice pudding shift like Marks use
My total short shift is about 125mm from gear to gear instead of about 275 mm as on the Marks box

Personaly I did spend once on a good gearbox ,long term it is cheaper than replacing gearboxes plus the inconveiniance of broken boxes cause it never happens in the driveway

Adrian

[MacroP]

R151F is found in the 3litre Surf's and the latest TD Hiluxes.
R150F is found in both V6 4Runner and the 2.4Litre Surf's.
R151F had the lower first gear but otherwise the same box.
Check your local rag or classifieds for someone wrecking a Surf privately.
R150F are more easier to find.
Good luck.

[HIL01X]

Do you reckon the r150 or r151 will fit straigt in, same bell housing, slave cylinder and all that? I don't want to stuff around too much ,I'm tempted to just go with the marks box, it suposedly goes straight in.
This is what I was greeted with.

[bulldogy]

OOps
R151F is what i meant too type !!!
That is why i said better for crawling and .
You can buy gearsets to convert to the 5.15 same as the dyna box from the US.
They should bolt straight upto the 2.8 diesel my mates did .
Bull

[HIL01X]

Thanks for that. I'll see what I can find tomorrow because I want it going fairly quickly.
Graeme.

[toyrex]

The R150 / R151 and Dyna all have the same bolt patern on the front of the gearbox they WILL NOT fit onto your existing G52 bell housing
You will need another bell housing to suit
A adaptor plate from Marks will cost about extra $375

Adrian

[suprasurf]

I've got an R151 down the back of the garage you can have for $500 with an L series bellhousing... prob not worh it tho as I'm over the ditch ...NZ :(

[HIL01X]

Call me crazy if you like but after 8 hrs driving today this is what my gearbox looks like tonight. It's a Marks heavy duty (dyna) gearbox and they through in a bellhousing to suit. I just hope it fits un OK tomorrow and it doesn't fall on top of me.

[toyrex]

Only 8 hours thats not even half way out of West Oz

[HIL01X]

Well i've got it all back together and it goes allright, not quite as bad as rice pudding, a bit lower in 1st gear (now 78.97 overall) and a bit higher in 5th.

Only 8 hours thats not even half way out of West Oz

I think I would rather be driving in WA somewhere than through Melbourne
Does your name, toyrex, mean you wreck toyota's You would be handy to know, if only you were a bit closer.

[toyrex]

toyrex is what I call my Hilux

As in toyranasaurus rex the only thing that will stop it is the next ice age

You now have 5.15 1st gear and 17% overdrive
wait till you do the dual transfer case like mine 1st low low 2630 engine rpm for 20 wheel rpm I can get out and walk faster

Adrian

[HIL01X]

Oh well, it,s always handy to know a fellow hilux owner. I wasn't game to have a look at the dual cases the other day as i may have been tempted. Perhaps I had better wait till I win tattslotto
I checked out your website Adrian and now know why you're so cluey on the subject.
Cheers, Graeme.

[robbie]

Call me crazy if you like ...

you're crazy

[jr9162]

The Marks hd gearbox is a Dyna truck gearbox with a 5.15 1st gear
The R150 has 3.86 1st gear commonly found in v6 4runners
The R151 has 4.31 1st gear in some serfs
The strength of the boxes above are the same as all the internals are interchangable
The G52 gearbox has a 3.96 1st gear
Personaly I cant see how the R150 with a faster 1st gear is better for crawling

I have the R151 fitted with the Dyna 5.15 built myself with internal shift
not the sloppy rice pudding shift like Marks use
My total short shift is about 125mm from gear to gear instead of about 275 mm as on the Marks box

Personaly I did spend once on a good gearbox ,long term it is cheaper than replacing gearboxes plus the inconveiniance of broken boxes cause it never happens in the driveway

Adrian

The R150 / R151 and Dyna all have the same bolt patern on the front of the gearbox they WILL NOT fit onto your existing G52 bell housing
You will need another bell housing to suit
A adaptor plate from Marks will cost about extra $375

Adrian

Adrain, I find it interesting you built your own R151F with a Dyna gearset. Did you also use Marlin's HD bearing cover plate? http://www.marlincrawler.com/trans.html

Does the Dyna R452 have the same 6.5 inch long input shaft as the R151F?

I'm postulating I could use a bellhousing from a Dyna truck to mate a 5L diesel to my R151F and gear driven transfer case....

JR

[ferrit]

im thinking more along the lines of mating a 1KZ-TE to a G52

[jr9162]

im thinking more along the lines of mating a 1KZ-TE to a G52

I think the tranny won't last over 6 months if you hot foot it or pull any heavy loads.

The G52 is the weakest of the Yota 5 speeds, W56 is 50% stronger, R151F is 100% stronger.

JR

[ferrit]

bummer, looks like if i want to ditch the 2.8 and throw in a 1KZ-TE i gotta steal the gearbox off the truck in the street when i gank his motor too

[Scott]

You'll probably need the t-case as well, since the one you've got won't fit the R151 gearbox without an adapter of some sort.

Does anyone know what's involved in swaping ratios between R150, R151 & dyna gearboxs. I've got a R150 and would love a lower first gear.

Is it just the gears that are required, or is there more to it?

[toyrex]

The Marks hd gearbox is a Dyna truck gearbox with a 5.15 1st gear
The R150 has 3.86 1st gear commonly found in v6 4runners
The R151 has 4.31 1st gear in some serfs
The strength of the boxes above are the same as all the internals are interchangable
The G52 gearbox has a 3.96 1st gear
Personaly I cant see how the R150 with a faster 1st gear is better for crawling

I have the R151 fitted with the Dyna 5.15 built myself with internal shift
not the sloppy rice pudding shift like Marks use
My total short shift is about 125mm from gear to gear instead of about 275 mm as on the Marks box

Personaly I did spend once on a good gearbox ,long term it is cheaper than replacing gearboxes plus the inconveiniance of broken boxes cause it never happens in the driveway

Adrian

The R150 / R151 and Dyna all have the same bolt patern on the front of the gearbox they WILL NOT fit onto your existing G52 bell housing
You will need another bell housing to suit
A adaptor plate from Marks will cost about extra $375

Adrian

Adrain, I find it interesting you built your own R151F with a Dyna gearset. Did you also use Marlin's HD bearing cover plate? http://www.marlincrawler.com/trans.html

Does the Dyna R452 have the same 6.5 inch long input shaft as the R151F?

I'm postulating I could use a bellhousing from a Dyna truck to mate a 5L diesel to my R151F and gear driven transfer case....

JR

I have never had any of the Toyota Dyna bearing retainer plate fail
The R150 / R151 / R452 all have the same length input shaft
I have several diesel [L seres] bellhousings to suit the R series gearbox if you cant find one

Adrian

[toyrex]

You'll probably need the t-case as well, since the one you've got won't fit the R151 gearbox without an adapter of some sort.

Does anyone know what's involved in swaping ratios between R150, R151 & dyna gearboxs. I've got a R150 and would love a lower first gear.

Is it just the gears that are required, or is there more to it?

You need to replace the input shaft, cluster shaft and all the gears including the over drive gears if you are planing on putting Dyna gear
set into your R150
If you want to send your gear box to Perth I can build it for you

Adrian

[jr9162]

I have never had any of the Toyota Dyna bearing retainer plate fail
The R150 / R151 / R452 all have the same length input shaft
I have several diesel [L seres] bellhousings to suit the R series gearbox if you cant find one

Adrian

Adrain,

I have a friend going to Perth on a retirement vacation this winter (your summer). I'm definitely interested in having her pick up that bellhousing What would be my cost in US or Australian dollars? It would have to be cleaned and packed in a cardboard box so she could check it as part of her luggage on the plane... PM me to work out the details.

I figured the early (US models) R150F, turbo R151F, and Dyna R452 would all have the same 6.5 inch input shaft length... That's 160 mm correct? Well the online converter at http://www.sciencemadesimple.net/cgi-bin/length.cgi tells me 6.5 inches is 165+ mm. I suspect the 6.5 inch measurement I was given is a ballpark figure.

My understanding is all L series engines have the same block to bellhousing bolt pattern. Is this a Hilux or Dyna bellhousing? I'm asking just for curosity's sake, since you have them and she'll be in Perth - I intend to obtain one from you.

Does it come with the hydraulic throwout bearing arm assembly? What do I use for a slave cylinder? Will my 22R slave cylinder work? Part numbers for the correct throwout bearing and slave cylinder would be useful for future reference.

Any thing special need be done regarding the 5L flywheel, clutch disk, and pressure plate?

When you refer to the Toyota Dyna bearing retainer plate - never failing, is it different than the stock R151F unit?

Thanks for the help man, you're a lifesaver.

JR

[toyrex]

JR

I can supply the bellhousing, clutch fork and slave cylinder
Both boxes have 6.5" [165mm] input shaft
Nothing to flywheel or clutch that I know of
Retainer plate both look the same
should ge the same thrust bearing as the 22R
Can send you a photo if you require
What month will your friend be here as I will be away late December to mid Janurary

Adrian

[slosh]

Just to clarify (I got a bit lost on all the info above)- how much modding does it take to fit a dyna box into the lux? From the Marks Adaptors site:

The heavy duty 5-speed, (originally a Toyota Dyna truck gearbox) when fitted with the new adaptor, gearbox top, selectors and main output shaft etc will directly replace the Hilux/4-Runner 5-speed gearbox.

I assume the box is the same length as R15# series?
Needs adaptor to fit G52 Hilux belhousing (what about Bundera T/D bell?)
Needs gearbox top/ selectors?
Needs new gearbox to transfer case adaptor and shaft?

So how does that compare with fitting up R15# boxes?

[jr9162]

Adrian, I sent you a PM

JR

[HIL01X]

Just to clarify (I got a bit lost on all the info above)- how much modding does it take to fit a dyna box into the lux? From the Marks Adaptors site:

The heavy duty 5-speed, (originally a Toyota Dyna truck gearbox) when fitted with the new adaptor, gearbox top, selectors and main output shaft etc will directly replace the Hilux/4-Runner 5-speed gearbox.

I assume the box is the same length as R15# series?
Needs adaptor to fit G52 Hilux belhousing (what about Bundera T/D bell?)
Needs gearbox top/ selectors?
Needs new gearbox to transfer case adaptor and shaft?

So how does that compare with fitting up R15# boxes?

When I bought the h/d box from marks they gave me a bellhousing to fit the 2.8 and it went straight in. I just had to give the transmission tunnel a few taps ( about 300 ) with a hammer to clear the external gear shift. Thats with a 30mm bodylift, otherwise they give you some spacers to put between the crossmember and chassis.

[jr9162]

Thanks to John Douglas http://members.ozemail.com.au/~jonhel5/
I learned that Marks makes an adapter to mate the R150F, and/or R151F (both with 165 mm or 6.5 inch long input shafts) to a G52/54 or W56/W58 bellhousing.

See http://members.iinet.net.au/%7Eozrunner ... rR150.html . I am waiting on the Marks part number. This unit should be available in the US via Advance Adapters - Marks agent in North America.

So just take your turbo Supra 7M-GTE block, use a 5M-GE flywheel - clutch assembly - and (W58) bellhousing assembly, this adapter, and mount your trusty R151F to the engine. No more trashed G52/G54 or W56's!

JR

[toyrex]

The R150 / R151 and Dyna all have the same bolt patern on the front of the gearbox they WILL NOT fit onto your existing G52 bell housing
You will need another bell housing to suit
A adaptor plate from Marks will cost about extra $375

Adrian

The part number for that plate is MFK 750 cost is $375 from the Marks factory in Melbourne
JR that photo John Douglas posted is of a unit I have in my workshop
It does however move everything back 16mm

Adrian

[jr9162]

Thanks for the info Adrian.

I thought it was about 1/2 inch thick looking at the pic. Actually my converter says 16 Millimeters equals 0.629921 Inches. Not much of a consequence is it?

Do you have to remove the R150F/R151F input shaft bearing retainer/cover to install the adapter?