1HZ-T - what transmission?

[euclid]

What transmisssions has Toyota used behind the 1HZ-t? I'm specificaly interested in automatics. A440?

 

[70sguy]

There is some debate about whether a factory Toyota 1HZ-T actually exists...
Can't speak for Coaster bus applications but in the LandCruiser 80 series 1HD-T came bolted to 2 versions of the A442F only, pre 92/08 80 series was pure Hydraulic A442F
Post 93/08 was ECT controled A442F
the latter is same as in the USA 93-94 FZJ80 but torque converter and valve body optimized for the Diesel power and torque curves.

 

[roscoFJ73]

There is not a lot of 1HZ autos out there. Seems to be mainly limited to Japanese 80 and 70 series models.
Says here they were A442F
TLC FAQ - 8.1 Transmission & transfer Case Ratios (All :1)

Japan4x4 might be able to locate one in Japan for you

Maybe you could apapt a A44O the same way as a H55F?.

 

[euclid]

Being that 1. the gearing is the same on the a442f and the a440f and 2. the belhousing is the same on an h55f and a a440f I think a 1HZ-T may bolt up to my a440f and work just fine. The tranny mounts could stay in the same spot, moving the motor mounts only.

Anyone see a reason that wouldn't work?

I have an a440f transmission from Rodney in Austrailia. If the valve body needed mods after the swap I could always send it back to him.

 

[Bryan062087]

Greg, are you thinking about a 1hz swap? That is my plan LONG down the road. It would be pretty sweet. I love my 3fe, but I feel like I'm single-handedly causing global warming driving my cruiser around.

As far as your question goes, I do not think the 1hz will bolt up to the a440f. If I remember right, the people who have done 1hz swaps have either had to change input shafts on their gas h55f's or have gotten new h55f's mated to the diesel. If the 2f/3f H55f will not work, I do not think the a440f will unless you change the input shaft. Can you do this with an automatic transmission?

I'm almost positive a 1-2ht would work with your a440f, but its the older (rarer) diesel and not the 1hz that you want. But it is turbo'd from the factory.

 

[lynchmob]

2. the belhousing is the same on an h55f and a a440f \.

Maybe you mis-typed this - but its not correct. The manual and auto bellhousing are not the same.

Ill be doing a 1HZ / A440 swap into an FJ62 in January. Ill post any info but so far it seems like it should be straight forward.

 

[lynchmob]

As far as your question goes, I do not think the 1hz will bolt up to the a440f. If I remember right, the people who have done 1hz swaps have either had to change input shafts on their gas h55f's or have gotten new h55f's mated to the diesel. If the 2f/3f H55f will not work, I do not think the a440f will unless you change the input shaft. Can you do this with an automatic transmission?

I'm almost positive a 1-2ht would work with your a440f, but its the older (rarer) diesel and not the 1hz that you want. But it is turbo'd from the factory.

The auto does not have an input shaft in the same way a manual does. The torque convertor is the interface so you need a flex plate for the 1HZ and a torque convertor that will fit between that and the trans as well as a bellhousing for the 440 that will fit to the 1HZ

The second thing you mention is a 12HT and it did come mated to an A440.

 

[euclid]

Greg, are you thinking about a 1hz swap? That is my plan LONG down the road. It would be pretty sweet. I love my 3fe, but I feel like I'm single-handedly causing global warming driving my cruiser around.

As far as your question goes, I do not think the 1hz will bolt up to the a440f. If I remember right, the people who have done 1hz swaps have either had to change input shafts on their gas h55f's or have gotten new h55f's mated to the diesel. If the 2f/3f H55f will not work, I do not think the a440f will unless you change the input shaft. Can you do this with an automatic transmission?

I'm almost positive a 1-2ht would work with your a440f, but its the older (rarer) diesel and not the 1hz that you want. But it is turbo'd from the factory.

I'm just exploring the options. I've been thinking the 4bd1t would be my swap, but the I got intrigued by the 1hz and started asking questions.

The auto does not have an input shaft in the same way a manual does. The torque convertor is the interface so you need a flex plate for the 1HZ and a torque convertor that will fit between that and the trans as well as a bellhousing for the 440 that will fit to the 1HZ

The second thing you mention is a 12HT and it did come mated to an A440.

Very cool. I can't wait to see your posts. Maybe you could do a whole thread.

What bellhousing and torque converter are you going to use between the 1hz and the 440?

I was mistaken on the bellhousing, thanks for pointing that out. The bolt pattern is the same, and obviously the h55 housing would have the hole and bolts for the clutch fork and slave. I wonder if the overall depth of the housing is the same? Perhaps the bellhousing from the 3FE/a440 would work with the 1hz?

 

[sandcruiser]

Whoever converted my 80 to diesel (from gas) put the motor mounts a little further back than stock. It creates problems-- changing the clutch was a bummer as the top of the motor hits the firewall when you tilt it down. Also the starter hits a part of the tranny hump and the bellhousing wants to hit a different part of the tranny hump.

I'd probably locate the motor correctly, then put the tranny crossmember wherever it needs to go. I wish the PO had done that.

Being that 1. the gearing is the same on the a442f and the a440f and 2. the belhousing is the same on an h55f and a a440f I think a 1HZ-T may bolt up to my a440f and work just fine. The tranny mounts could stay in the same spot, moving the motor mounts only.

Anyone see a reason that wouldn't work?

I have an a440f transmission from Rodney in Austrailia. If the valve body needed mods after the swap I could always send it back to him.

 

[euclid]

Whoever converted my 80 to diesel (from gas) put the motor mounts a little further back than stock. It creates problems-- changing the clutch was a bummer as the top of the motor hits the firewall when you tilt it down. Also the starter hits a part of the tranny hump and the bellhousing wants to hit a different part of the tranny hump.

I'd probably locate the motor correctly, then put the tranny crossmember wherever it needs to go. I wish the PO had done that.

A mild 1" body lift would probably solve the problems your PO created. I have a 2" body lift on my truck, creating a little bit of wiggle room if I were to do a conversion at some point.

 

[sandcruiser]

yes, some body lift would improve the fitment, but I don't want to go any higher... I use this truck for clients, and some folks already have trouble climbing in/out comfortably.

Maybe once I get some bumpers ff/rr, the extra weight will pull stuff down to where a body lift makes more sense.

 

[BlueHZT60]

Being that 1. the gearing is the same on the a442f and the a440f and 2. the belhousing is the same on an h55f and a a440f I think a 1HZ-T may bolt up to my a440f and work just fine. The tranny mounts could stay in the same spot, moving the motor mounts only.

Anyone see a reason that wouldn't work?

Motor mounts will need to change - based on a 60 - hz swap. They may be slightly different for a 62. I'd start with the engine placement/cooling fan/shroud/level/firewall clearances. Bob

 

[lynchmob]

Motor mounts will need to change - based on a 60 - hz swap. They may be slightly different for a 62. I'd start with the engine placement/cooling fan/shroud/level/firewall clearances. Bob

I think greg is looking at doing this in an FJ62. In that case he is right. He only would need to change the engine mounts and leave the trans where it is.

I might do the engine first if it was HZ/Auto into an FJ60 although it would be easy enough to get the trans in the right spot based on placement in a 62.

 

[euclid]

Thought I'd share an email exchange with Rodney at wholesale automatics:

From: Greg Thompson [mailto:euclid42@gmail.com]
Sent: Saturday, 6 December 2008 11:26 AM
To: Hudson-Davies
Subject: lancruiser question

Rodney,
I'm still loving the A440F rebuild you did for me, and recommend it often on ih8mud.com.
I'm interested in swapping my 3FE for the more modern 1HZ. A couple of questions if you have time:
1. Is the A440F rebuild you did, with the extreme valve body, up to the task of being behind the 1HZ with a possible turbo added?
2. It seems the gearing on the A440f and the A442 are the same. My research says that the earlier A442's were fully hydraulic like the A440's. Does that seem correct to you? Do you see any driveability issues with an A440 behind a 1HZ?
3. The remaining piece of the puzzle on the swap is which belhousing to use. Do you know the differences on the belhousing, flex plate, and torque converter used on the A440 vs the A442.
Lastly, may I publish your answers on a thread on ih8mud?
Thanks as always.
Regards,
Greg Thompson
Jackson, MS USA


Hi Greg it’s Rodney here from Wholesale Automatics

Why put a 1HZ and have half the power when you can put either a Turbo Diesel 6.5L Chevy V8 or Petrol Big Block on Gas (No Petrol) The transmission will be fine although me might need to modify the torque convertor a little.

We can help you with all of this but I guess Advanced adaptors can as well.

Let me tell you that the 1HZ is VERY SLOWWWW

Kind Regards
Rodney
Wholesale Automatic Transmissions
Factory 1/58 Barry St
Bays water
Victoria 3153
Phone: +613-97628004
Fax: +613-97628004

 

[Tapage]

I was ! a fan of Rodney ... how he recomend a Chevy over the great 1HZ .. !!!!

 

[Dougal]

I was ! a fan of Rodney ... how he recomend a Chevy over the great 1HZ .. !!!!

Does seem a backwards step. More power maybe but for how long?

The 4BD1T was mentioned above, IMO superior to all the engines mentioned in this thread.
The 1HZ seems to be popular in areas which didn't receive the later engines, it gets a lot of publicity here but there are better choices.

 

[Radd Cruisers]

I have an HZJ73 with an A440F (1992)...

 

[euclid]

I have an HZJ73 with an A440F (1992)...

Any idea what belhousing is used?

 

[esh]

That is a bizarre response from Rodney. I have a 454 in one of the 7 cruisers and the truck it is in is the only truck it *should* be in.

Keep the faith GT. I think you're headed in a good direction. Get it in and come to the Bash!

 

[lynchmob]

Any idea what belhousing is used?

A440 and A442 are the same trans main case. The A440 and A442 were connected to 1HZ and 1HD (same block).

You can swap bellhousings from any A440(442) to another version of the trans.