Possible transmission issue in my new 93 HDJ81 - help/suggestions?

[asutherland]

Some more information: The pages you want to read closely in the FSM (at least in FSM version 111, 1996) start on Page DI-156.

The Shift Solenoid 1 and 2 resistance should be between 11 − 15 Ω.

 

[OldYota]

Read this thread and basically had the exact same problem - had to replace two shift solenoids in a A442F! The were $200+ each, but that beats the price for a tranny rebuild. Have 312K miles on a '93.

 

[asutherland]

Read this thread and basically had the exact same problem - had to replace two shift solenoids in a A442F! The were $200+ each, but that beats the price for a tranny rebuild. Have 312K miles on a '93.

 

[asutherland]

Well, time to revive my most favourite thread... problems with my transmission.

Recently (last weekend) I started having the same symptoms again. Laggy start, but works if I shift manually, no lockup. I thought, jeesh, solenoids again!?!

Pulled the codes from the ECU, they show code 62, 63, 64, 65 - which according to the FSM is Severed #1 Solenoid or short circuit - severed wire harness or short circuit - One code per solenoid.

I doubt very much all 4 solenoids took a puke at the exact same time. That plus the (different) codes make me believe it's a wiring problem.

Does anyone have any suggestion on where wiring might give me problems? Where does the ECU wiring connect to the transmission?

My next step is to check resistance on each of the four solenoid(s) and their wiring by testing on the ECU output connector.

 

[asutherland]

HA HA HA HO HO HO EHEHEHE

Christmas came early for me! Seriously. Seriously! *grin*

Is it beer time yet? That was a hard day.

 

[IanB]

I love it when a fix comes that easily!

 

[asutherland]

I love it when a fix comes that easily!

Totally... I cannot believe I got off that easy. The funny part is when I was laying underneath it last night if I had been laying on the other side I would have seen it immediately.

Crisis averted!

 

[mypancreasbroke]

My truck is exhibiting similar symptoms... but only in the first few minutes of driving. When I leave today I will test it out by manually shifting. This problem only showed up after swapping my o2 sensors and doing the paperclip EGR fix... so could those two things cause a tranny solenoid issue to show up?

Andrew

 

[asutherland]

My truck is exhibiting similar symptoms... but only in the first few minutes of driving. When I leave today I will test it out by manually shifting. This problem only showed up after swapping my o2 sensors and doing the paperclip EGR fix... so could those two things cause a tranny solenoid issue to show up?

Andrew

Hi Andrew, nice name. Also, my pancreas broke as well! Damn diabetics.

As the transmission warms up, the heat can affect the resistance on the solenoids. The heat would decrease the resistance across the solenoids, perhaps putting them back into spec... so yes, it could definitively be the same problem.

I doubt o2 sensors would have any affect (maybe just coincidence?) and I don't know what the EGR fix is (cause I don't have an EGR *grin*)

Try 1st and 2nd gear manually shifting and see how it works.

thx
Andrew

 

[EdoLoop]

anybody have the specs on the shift solenoids? im having a similar intermittent shifting issue as well.

 

[asutherland]

anybody have the specs on the shift solenoids? im having a similar intermittent shifting issue as well.

I do, standby...

 

[asutherland]

11-15 Ohms. See attached pic. from DI-135 and on in the 1996 FSM

Also handy:

DIAGNOSTICS − AUTOMATIC TRANSMISSION
1996 LAND CRUISER (RM451U)

Evaluation:
If there is no 1 → 2 up−shift:
Shift solenoid valve No. 2 is stuck.
1−2 shift valve is stuck.
If there is no 2 → 3 up−shift:
Shift solenoid valve No. 1 is stuck.
2−3 shift valve is stuck.
If there is no 3 → O/D up−shift:
3−4 shift valve is stuck.
If the shift point is defective:
Throttle valve, 1−2 shift valve, 2−3 shift valve, 3−4 shift valve etc., are defective.
If the lock−up is defective:
Lock−up solenoid is stuck.
Lock−up control valve is stuck.
Lock−up signal value is stuck.
(2) In the same way, check the shock and slip at the 1 → 2, 2 → 3 and 3 → O/D up−shift.

 

[EdoLoop]

Thanks that helps a ton!

 

[TGAMO]

I am not sure how this could be related but would a slight surge or increase in RPMs while shifting into second gear be a similar problem that solenoids might resolve?

 

[asutherland]

I am not sure how this could be related but would a slight surge or increase in RPMs while shifting into second gear be a similar problem that solenoids might resolve?

It's possible, I'd check the timing solenoid. Well really, if you're in there check all four. I assume you have one with the solenoids?

 

[asutherland]

I thought this information was worth reviving this old thread for. Some alternatives to the expensive toyota OEM shift solenoids, info kindly shared on our 80 series in Canada Facebook page.

To clarify, this is for the A442F electronic shifted transmission often found in mid/later HDJ81 s