700R4 was just the old designation before they started calling 'em the 4L60.
Now, 'bout yer wiring.
Flip that '91 tranny upsidedown and pull the pan. We gotta rewire it to marry to the '86 control switches.
I'm going by memory here, so bear with me. :>)
All we're dealing with is a hot wire and a ground wire at the tranny case connector. The "juice" comes in, routes thru the solenoid, thru the control switches and then back out to be grounded by the computer on a '91 model.
That ain't a gonna work on an '86.
Replace the 3-4 pressure switch with a normally open, 45 to 60 lb self grounding switch(if ya can't find a self grounding switch, ground one terminal to a valvebody bolt).
THEN, the white wire coming in (may be yellow on your tranny) goes to the TCC solenoid, other wire from the solenoid goes to the switch and then when the switch closes, it grounds thru itself at the valve body. When the circuit is closed, the TCC solenoid locks 'er up.
Just ignore the other switches at the valve body and the other wire at the case connector. The 86's vacumn switches will handle the breaking of the TCC circuit for acceleration and the 'brake' switch is already incorporated in that circuit anyway.
The way they wired those diesels from the factory was a nightmare......just don't need all that herky-jerky contraption; just a high pressure lock-in switch.
We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]
Today's Featured Article - Restoration Story: Fordson Major - by Anthony West. George bought his Fordson Major from a an implement sale about 18 years ago for £200.00 (UK). There is no known history regarding its origins or what service it had done, but the following work was undertaken alone to bring it up to show standard. From the engine number, it was found that this Major was produced late 1946. It was almost complete but had various parts that would definitely need replacing.
... [Read Article]
Latest Ad:
1964 I-H 140 tractor with cultivators and sidedresser. Starts and runs good. Asking 2650. CALL RON AT 502-319-1952
[More Ads]
All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy
TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.
