1HZ to H55F: How to do it?

[KeepCruzin]

Hey guys,

I am looking to swap a 1HZ-T into my FJ40, and want to put a 5 speed behind it. 1HZ's are a bit out of my wheelhouse as my experience is with 12HT's.

Will a standard H55F bolt up to a 1HZ? Does it need a special bell housing or transmission input shaft? Any wisdom would be greatly appreciated.

My current powertrain plan is this: 1HZ-T, H55F (going to buy one new if possible), FJ60 transfer case

Thoughts and recommendations are appreciated.

 

[roscoFJ73]

Does it need a special bell housing or transmission input shaft?

Yes, they have the 21 spline shaft. The starter motor is on the opposite side to the F and H engines. The T case shouldnt be a problem if it accepts the larger output shaft. (is it 38mm vs 32mm?)

 

[mderrick]

Cruiseroutfitters has brand new h55's, they come with the correct input shaft. you will need to source a bell housing and flywheel most likely.. I have a complete drive train that I might be selling...

 

[roscoFJ73]

Wouldnt the flywheel come with the engine?

 

[mderrick]

Wouldnt the flywheel come with the engine?

depends on if the motor was attached to an automatic or manual transmission. both my HZ's were auto's so I had to source flywheels.

 

[Nostradamus]

depends on if the motor was attached to an automatic or manual transmission. both my HZ's were auto's so I had to source flywheels.

Mine was an auto as well. Came with some weird flexplate looking thing on it.

 

[roscoFJ73]

depends on if the motor was attached to an automatic or manual transmission. both my HZ's were auto's so I had to source flywheels.

Yes, I was always forget they had autos. Autos in HZJ7* are very rare in Australia. There may have been a few PZJ and HZJ70/73 with autos imported but Ive only heard about them.

 

[nickolai]

1HZ to H55F is very simple. Just need the right bellhousing, flywheel and clutch combo. Its been done lots of times on this forum

You're after the fine (21 spline) input on the H55F, they came in 3 flavours:
-For F series engines (6 spline) and 2H/ 12HT
-For B series engines (21 spline, Long)
-For 1H* series engines (21 spline, short) - the one you need.
You can swap the input shafts between boxes if you need to but its a full tear down, so only really viable in a full rebuild while-you're-in there deal.

You can use a flywheel from a 1HZ or a 1HDT. The 1HDT clutch is bigger (300mm vs 275mm) but fits just the same.

Here's some part numbers which may help:

31111-60230 1HZ to H55F bellhousing
31210-60121 1HDT 300mm pressure plate
31210- 36161 1HZ 275mm Pressure plate
31470-60161 HZ release cylinder
33311-60170 1hz to h55 input shaft
13405-17020 1HDT flywheel

I wouldn't buy anything from these guys, but this website is helpful for pinching part numbers:

1HZ Specific Engines and Parts : CruiserParts.net, Toyota Landcruiser Parts

CruiserParts.net : 1HZ Specific Engines and Parts - 40 Series 60-84 60 Series 81-90 55 Series 69-80 80 Series & LX450 90-07 100 Series & LX470 98-07 FJ Cruiser 07-current Diesel & Non USA Sections Vehicles For Sale Hardware and Misc. Parts 200 Series & LX570 2008-Current 70 Series Tools, Fluids...

shop.cruiserparts.net

 

[bottombracket]

I'm going down this exact road in my '77 FJ40. I am in parts accumulation stage.

Kurt @cruiseroutfit has new H55's with the 1HZ specific input shaft for $2450. Stupid good deal. I bought mine from him.

Kurt has new bellhousings as well. I sourced a used one.

Clutch kits, masters and slave cylinders are all readily available.

As far as mounting goes, @crushers has a complete set of motor mounts, a custom crossmember, etc. My good friend @teleskier bought all his 1HZ conversion parts from him. I may do the same.

Power steering will have to be relocated and the easiest thing is a 60 box and shaft mated to your current 40 column. Kurt also sells a $12 lower steering bearing that works well for this purpose.

For steering, Wayne has a complete OEM solution using a mix of 40 and 70 series steering parts. I haven't gotten this far yet in planning my own build.

@roma042987 's 1HZ into a 40 build thead is required reading. As is @crushers.

Message me anytime, though most of the guys I've linked above are the masters here.

 

[cruiseroutfit]

Cruiseroutfitters has brand new h55's, they come with the correct input shaft. you will need to source a bell housing and flywheel most likely.. I have a complete drive train that I might be selling...

We (Cruiser Outfitters) stock the 1HZ specific H55F transmission (new), the 1HZ to H55F bellhousing, clutch fork, clutch fork boot, and clutch kit too. We don't currently stock flywheels but it's on our radar

We can offer them as transmission only ($2450) or complete with a t-case (~$4000 assembled)

Parts here: Cruiser Outfitters

 

[bottombracket]

(pretty sure that's my transmission and @teleskier 's h55/new t case combo pictured above).

 

[cruiseroutfit]

(pretty sure that's my transmission and @teleskier 's h55/new t case combo pictured above).

Definitely is

 

[Splangy]

1HZ/h55f combos were very common in 70 series trucks so parts aren’t very hard to find. 1HZ/R151f combos were also available in a few models so make sure you get the right 5-speed bell housing and clutch components.