Diesel Tranny wiring.... Stand-alone??? Pleae look!

[BigBlockBurris]

I am parting down a 1991 R-3500 CC truck. It has a 6.2 diesel and a 4L80-E tranny. I believe I read somewhere (I searched and could not find it) that this is a desirable setup due to the fact that the tranny has a stand alone harness. Is this true?? Please explain. Thanks in advance.

BBB

 

[CrewCab59]

I am parting down a 1991 R-3500 CC truck. It has a 6.2 diesel and a 4L80-E tranny. I believe I read somewhere (I searched and could not find it) that this is a desirable setup due to the fact that the tranny has a stand alone harness. Is this true?? Please explain. Thanks in advance.

BBB

Yes ,the 4l80e have a stand alone controler.The trans is a verson of the Th400 but with overdrive.The trans won't work with out controler.

What else do you need to know?

 

[BKinzey]

A 400 with overdrive? Is that the same as an electronic 700R4? That's what I've heard but other than an overdrive I couldn't tell you what the difference is between a 350, 400, or 700R4

 

[tRustyK5]

I am parting down a 1991 R-3500 CC truck. It has a 6.2 diesel and a 4L80-E tranny. I believe I read somewhere (I searched and could not find it) that this is a desirable setup due to the fact that the tranny has a stand alone harness. Is this true?? Please explain. Thanks in advance.

BBB

The only thing more desirable would if it was a '91 V3500 with a 6.2, 4L80E and a NP 205.

Rene

 

[BigBlockBurris]

Thanks

Thanks guys.

Crewcab59,
So this is a 100% stand alone harness. When I part the truck I should be able to remove the complete harness for future use? I guess what I am asking is that it does not need ANY input from the motor? It is 100% stand alone? The harness for the tranny is in the underhood harness loom, so I am just curious. If it is stand alone I am going to split the harnesses. Thanks

BBB

 

[CrewCab59]

A 400 with overdrive? Is that the same as an electronic 700R4? That's what I've heard but other than an overdrive I couldn't tell you what the difference is between a 350, 400, or 700R4

No , the 4l80e isn't the 700R4 .The 700r4 was the replacment for the Th350 !

The 4l80e replaced the Th400!

 

[BKinzey]

Yep, missed it again

It's the 4l60 I was thinking of. All I had to do was look at the cover of the ATSG THM 700-R manual I bought Maybe I'll crack it again but last time I got such a headache

 

[CrewCab59]

Thanks guys.

Crewcab59,
So this is a 100% stand alone harness. When I part the truck I should be able to remove the complete harness for future use? I guess what I am asking is that it does not need ANY input from the motor? It is 100% stand alone? The harness for the tranny is in the underhood harness loom, so I am just curious. If it is stand alone I am going to split the harnesses. Thanks

BBB

Yes,
You can remove the controler ,it setting behind the glove box.

 

[Jimbo*]

Ok, then I have a question along these same lines: I recently traded for a 1991 crew cab 2wd pu with a 5.7 and a 4l80e. Is my 4l80e a stand alone harness, or is it part of the tbi harness? If it's part of the tbi harness, where is the vss? Can I (hopefully) just remove the tailhousing and install the spacer and adapter and my 205?
Thanks, Jimbo

 

[kennyw]

On the gas motors the computer for the tranny is going to be integrated in with the TBI stuff...

 

[Jimbo*]

That's what I thought. So, where's the VSS? I have a core 4l80 out of a 96, and there is no VSS on the tailhousing; is my 91 4l80 VSS internal also?

Can I remove the tailhousing and install the spacer/adapter and 205 and be good?

Thanks, Jimbo

 

[kennyw]

If VSS is related to the speedometer it should be in the tailhousing of the tcase.

 

[azblazor]

Thanks guys.

Crewcab59,
So this is a 100% stand alone harness. When I part the truck I should be able to remove the complete harness for future use? I guess what I am asking is that it does not need ANY input from the motor? It is 100% stand alone? The harness for the tranny is in the underhood harness loom, so I am just curious. If it is stand alone I am going to split the harnesses. Thanks

BBB

The 4L80E computer requires input frm the throttle position senson (TPS), the VSS and engine RPM.