Any CEL or codes? Sounds like a bad shift solenoid.

 

No check engine light when it's running.

 

Did you have to drop the pan to repair or replace the filler tube? Whta is happening when you rev up to 2400 rpms? Fluid levels are back to normal?
It's possible the TCU has detected an issue and has initiated Limp Mode to protect the drive train, that would explain the limit on rpms. You need a scanner that will detect transmission codes.

 

I had to drop the pan to repair the dip stick filler tube because it was leaking. After the repair I cleaned the gasket surfaces and used red oil resistant rtv gasket sealer and reassembled it I filled the transmission with fluid and started the engine, rechecked the fluid level and filled the rest of the way. I cycled through the gears with my foot on the brake and nothing was happening. I put the selector in drive and depressed the throttle to see if it would work. Nothing. It felt like it wanted to move but it was like it was fighting itself, as if it were in say drive and reverse at the same time. Even in park the engine will not accelerate above 2400 RPMs and it acts like it's still fighting itself to try and move. I've never seen anything like this.

 

Sure sounds like the TCU is getting conflicting data and has the truck in Limp. Needs to be scanned.

 

Any chance that because I put my 96 TWD engine in and used the 96 TWD computer that it could have fried a solinoid? This tranny was perfect working. I couldn't ask for a better one. It's so clean that I have a thought that it was rebuilt, especially when I saw how clean and red the fluid was and having 216,000 on the chassis before I built it. I'm trying to find the test procedures for the electronics now.

Where is the TCU located on this and do I need a special reader for it?

 

Here is a article on scanners. They plug into the usual OBD2 port. I don't know where the TCU is but I doubt you'll need to access it.

OBD2 Scanner that Reads Transmission Codes

Hey, Vince here. transmission problems are one of the most difficult to diagnose. Even with the help of an obd2 scanner that reads transmission codes, the root of the problem usually can’t be fixed by a simple bolt-on part.

scanneranswers.com

 

Also, what are the specs on the replacement 1996 ECU? 4WD or 2WD? ABS or non-ABS? Auto or manual transmission? Part number would be handy that's printed on the ECU.

 

They dont match, I looked at them the other day. I never should have been dumb enough to put it in the truck. The problem is that I ran it with the 4x4 computer before I switched them and it did the same thing. It's an automatic and I'm really bummed about this. When it was hanging down from the jack leaking down overnight and was hanging by the linkage do you think it could have damaged something internal? I really need the factory electrical service repair manual. I just need to know what it looks like to order the right one.

 

Besides dropping the pan, did you perform any other maintenance? Did you try replacing the transmission filter? If you did, it's possible that the seal isn't seated all the way. Also, check the wiring harness to the transmission. A multimeter will be useful to check fer continuity and resistance to the ECU.

 

It's an automatic transmission and I'm not at home right now to check the ECU numbers but I know that the two wheel drive ECU numbers are different from the fwd ECU numbers. I didn't remove the filter because my local parts store couldn't get the right one. I found it online with all three solinoids and gaskets for 56.99. I am going to order the kit just for the filter and keep the solinoids for possible future use. I had to have damaged something in the process of changing the engine, even though I was anally cautious about the wiring and the transmission. I'm just going to track everything from the ECU to the transmission. I just need to know which book to purchase. I can't really afford to buy the wrong one at this point. This pandemic, I've been out of work for a while and running out of savings.

 

. I just need to know which book to purchase. I can't really afford to buy the wrong one at this point.

@BamZipPow would know

 

I've mentioned it to him but he hasn't said anything about it.

 

Here's a 1997 EWD listed on eBay fer just over $37 if you act now.

1997 Toyota T100 Wiring Diagrams Schematics Layout Factory OEM | eBay

It shows the various electrical circuits, fuses, distributor, etc. It also includes electric windows, seats, wipers, etc. Factory Wiring Diagrams.

www.ebay.com

 

Hey BZP, I just had someone tell me that you would know which book I need to purchase. Is this the case? I would definitely appreciate it if you could share it with me. I just want to be sure that I buy the right one first time around. Thanks, Roger.

Here's a 1997 EWD listed on eBay fer just over $37 if you act now.

http://[URL]https://www.ebay.com/it...itm/1997-Toyota-T100-Wiring-Diagrams-Schematics-Layout-Factory-OEM/152828601210

[/URL]

Do you know if it has the transmission circuit in it? Either way for that price I need to get it. Thank you man I appreciate it very much.

Using www.car-part.com, here are some used 1997 4WD auto ECUs.

1997 Engine Computer Toyota T100	GOOD CONDITION WARRANTY 89661-0W030 WILL SHIP AS-IS	​	214006	$140​	WNC Auto Parts LLC USA-NC(Candler) Request_Quote 828-633-0694 Request_Insurance_Quote	828​
1997 Engine Computer Toyota T100	3.4,4AC,4WD,CHK-ID	​	GJ0476	$125​	A-Burlington Used Auto Parts USA-MA(Shirley) Request_Quote 1-800-228-5544 Request_Insurance_Quote	1572​
1997 Engine Computer Toyota T100	Electronic Control Module, (RH kick panel), 6 cylinder, 4x4, AT,V6 NA DOHC 24V, 3.4,AUTO TRANS-273K	C​	1011	$100​	Valley Auto Salvage, Inc. USA-CA(San-Jacinto) Request_Quote 1-951-925-0595 Request_Insurance_Quote	1278​
1997 Engine Computer Toyota T100	SR5,3.4L,AT,4X	C​	AH3774	$Call​	MSI Auto Parts USA-AK(Fairbanks) Request_Quote 907-452-2695 Request_Insurance_Quote	3251​

I'm hoping that the ECU isn't bad but it's better than the transmission that's for sure. Thank you again for all your help with this mess I got myself into. I guess I should have removed the ECU before changing the engine. I wont make that mistake again. Thanks again.

 

Using www.car-part.com, here are some used 1997 4WD auto ECUs.

1997 Engine Computer Toyota T100	GOOD CONDITION WARRANTY 89661-0W030 WILL SHIP AS-IS	​	214006	$140​	WNC Auto Parts LLC USA-NC(Candler) Request_Quote 828-633-0694 Request_Insurance_Quote	828​
1997 Engine Computer Toyota T100	3.4,4AC,4WD,CHK-ID	​	GJ0476	$125​	A-Burlington Used Auto Parts USA-MA(Shirley) Request_Quote 1-800-228-5544 Request_Insurance_Quote	1572​
1997 Engine Computer Toyota T100	Electronic Control Module, (RH kick panel), 6 cylinder, 4x4, AT,V6 NA DOHC 24V, 3.4,AUTO TRANS-273K	C​	1011	$100​	Valley Auto Salvage, Inc. USA-CA(San-Jacinto) Request_Quote 1-951-925-0595 Request_Insurance_Quote	1278​
1997 Engine Computer Toyota T100	SR5,3.4L,AT,4X	C​	AH3774	$Call​	MSI Auto Parts USA-AK(Fairbanks) Request_Quote 907-452-2695 Request_Insurance_Quote	3251​

 

New from the online dealership is about $800. Part number 89661-0W030.

89661-0W030 Genuine Toyota Ecm Ecu Engine Control Module

ToyotaPartsDeal.com offers the great deal for genuine Toyota parts 89661-0W030 (896610W030) Ecm Ecu Engine Control Module. All parts are backed by the Toyota's warranty.

www.toyotapartsdeal.com

 

Did you git yer 1997 EWD yet?

 

Have you ever used a technician service to help you fix your vehicle.

 

No not yet but it's on it's way in the mail. It's supposed to be here on the first-eighth. Hopefully with any luck, (which I haven't had much of lately), it will be here early or on the 1st. Lol. Thanks for asking though, I really appreciate your help with all this mess. By the way part of the problem I'm having is when I switched the body from the TWD over to the fwd, the harness in the 4x4 was cut with the inner cab harness gone so I had to use the TWD engine harness and transmission harness along with it. Transmission from 2wd is 340f, and 4x4 is 340e . Don't know how I went so long without trouble?? I have two choices at this point. Make a harness for the transmission to the ECU or find another T100 4x4 harness. I looked up a harness online for it a couple months ago and just the under dash harness was $ 249.99!!!
Given the fact that I am a poor bastard for a while in the foreseeable future, do you know of any 96-98 4x4T100's being parts donors? I have combed every yard I know of for 250 square miles and"nothing". Maybe I should just let go of it and find another truck. Just the thought of it makes me well up a bit. I'm starting to see no choice in the matter. I have to have a truck for everyday life and work. Living in the country requires a truck like it or not. I'm a pick-up man but also a covered wagon man too. I've always had a love for vans and station wagons. I know I'm weird!! LMAO. So to end this long book I'm writing here, if you happen to know or hear about an opportunity to get a 4x4 96-98 5vzfe automatic harness please please let me know. Thank you again.