Slipping out of OverDrive (1 Viewer)

[Nitro]

I have a 1992 HDJ81 4.2L Turbo Diesel with an automatic transmission.

When I'm going down the road in OverDrive at 100km the tach increases and it seems to be slipping out of overdrive. I will down shift and no problems. It doesn't always happen which is strange.

I drove it for over an hour and no issues. Then I turned around to come back home after some wings and beer. Then it did it again. I gave up talking to repair shops in my area because the think im driving a UFO since its a diesel land cruiser and they don't want to even look at it.

I have seen some posts about OD solenoids but i don't know anything about automatic transmission besides its easier to drink beer and wheel.

Any ideas?

 

[gummycarbs]

First thing is to figure out WTF transmission you have.

Hydraulic A442F not shifting right

Hi everyone, I have a 1991 hdj81 1hdt w/ a hydraulic A442F (I believe it’s hydraulic and not the electronic type because it’s a 91) so my problem is my transmission doesn’t like to shift out of 1st gear when the engine is still cold, I have to manually put the stick into 2nd and it will shift...

forum.ih8mud.com

My head hurts now, and I still don't know whether or not your transmission has solenoids. If it were electronic(ish) like my US-market A442F, I would wonder what triggers it to drop out of overdrive or lockup, which would make me suspect a bad O/D or brake switch.

 

[Dusten]

First thing is to figure out WTF transmission you have.

Hydraulic A442F not shifting right

Hi everyone, I have a 1991 hdj81 1hdt w/ a hydraulic A442F (I believe it’s hydraulic and not the electronic type because it’s a 91) so my problem is my transmission doesn’t like to shift out of 1st gear when the engine is still cold, I have to manually put the stick into 2nd and it will shift...

forum.ih8mud.com

My head hurts now, and I still don't know whether or not your transmission has solenoids. If it were electronic(ish) like my US-market A442F, I would wonder what triggers it to drop out of overdrive or lockup, which would make me suspect a bad O/D or brake switch.

The diesel JDM land cruiser has a full hydro transmission. No solenoids.

I bet it's not coming out of over drive. But instead the converter is unlocking.

This can be caused my a few issues. Mine just coat me $6000+

 

[flintknapper]

The diesel JDM land cruiser has a full hydro transmission. No solenoids.

I bet it's not coming out of over drive. But instead the converter is unlocking.

This can be caused my a few issues. Mine just coat me $6000+

^^^^

This.

 

[shocktower]

The diesel JDM land cruiser has a full hydro transmission. No solenoids.

I bet it's not coming out of over drive. But instead the converter is unlocking.

This can be caused my a few issues. Mine just coat me $6000+

WTH 6K and what transmission is yours running

 

[Dusten]

WTH 6K and what transmission is yours running

Full hydro a442f in all JDM diesel 80 series.

Rebuilds with labor are 5-7k.

 

[Nitro]

Full hydro a442f in all JDM diesel 80 series.

Rebuilds with labor are 5-7k.

View attachment 2872123

Ya, I figured I would into it under 10k. Where are the tags to see what transmission I have?

 

[Dusten]

Ya, I figured I would into it under 10k. Where are the tags to see what transmission I have?

The firewall

But it's a 1992, so it's a 1hdt. Which means it's a hydraulic a442f. Same trans as mine.

 

[Dusten]

What controls lock up in a hydro a442f?

1991 HDJ81. 1HD-T Just today this occurred. It will not lock up the converter regardless of speed. I don't see to have any other issues. I verified kick down adjustment and just for fun drained and filled the trans pan. Fluid was full, looked fine, did not smell burnt. I searched and...

forum.ih8mud.com

 

[shocktower]

Full hydro a442f in all JDM diesel 80 series.

Rebuilds with labor are 5-7k.

View attachment 2872123

Wow, I guess it pays to figure things out sorry you got violated

 

[Dusten]

Wow, I guess it pays to figure things out sorry you got violated

I don't feel Violated. s*** happens. Everyone I've talked to that's had one of these rebuilt told me to expect 5-7k. I landed right in the middle with a 36k warranty and I didn't have to spend 2 days on my back pulling it.

I can work a few overtime weekends and make it back easy.

 

[Nitro]

The firewall
View attachment 2872245


But it's a 1992, so it's a 1hdt. Which means it's a hydraulic a442f. Same trans as mine.

Yep ours were built in the same plant. Sweet. I am having trouble just trying to find someone to flush it let alone rebuild one. I am going to keep looking. Thanks for your help. I wonder if I should have it completely gone through? I probably will. Look for an updated valve body etc

 

[Nitro]

Is there any retailers that sell quality rebuild kits? Or should I go with Toyota. Stupid question right....

 

[Dusten]

Is there any retailers that sell quality rebuild kits? Or should I go with Toyota. Stupid question right....

There are.
There is also a company that sells rebuilt, bolt in units.
They also sell valve body's.

Home - CruiserBrothers - https://cruiserbrothers.com/ is the us vendor.

 

[Nitro]

There are.
There is also a company that sells rebuilt, bolt in units.
They also sell valve body's.

Home - CruiserBrothers - https://cruiserbrothers.com/ is the us vendor.

Ah great, thank you very much.

 

[BILT4ME]

Yep ours were built in the same plant. Sweet. I am having trouble just trying to find someone to flush it let alone rebuild one. I am going to keep looking. Thanks for your help. I wonder if I should have it completely gone through? I probably will. Look for an updated valve body etc

Check with @cjmoon . He does all Land Cruiser stuff locally. I would trust him with mine and he's a diesel guy.