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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: zieg85 on February 17, 2011, 08:41:13 PM

Title: Transmission swap stick to 700R4
Post by: zieg85 on February 17, 2011, 08:41:13 PM
I have all the obvious needs covered like the automatic column, linkage, shift indicator, radiator, trans lines, TV/detent cable, drive shaft.  The transmission came out of a 1987 C10 and going into a 1986 C10 that was a stick shift.  My question is what is involved with hooking up the electrical on the 700R4 to my 1986 which I am pretty sure that plug isn't under the truck.  The loom is still in the 87 but it was a TBI engine.  I desire to make it work like it is supposed too with the lockup if at all possible.  I also have a 1986 C10 if I need to get the wiring off of that but I want to understand what it is and how it works.
Title: Re: Transmission swap stick to 700R4
Post by: Grim 82 on February 17, 2011, 09:27:44 PM
You'll need the frame mounted bracket for the auto shift linkage, the appropriate flex plate for your motor, the low vacuum switch, and a switch that goes on the brake pedal, which I believe is to unlock the convertor when you tap the brake. TBI on the donor truck shouldn't make any difference as far as the wiring.

The 700r4 that I used to replace the sm465 in my 82 came out of an 88 sub with TBI. I pulled all the wiring and switches from my 84 parts truck with a 700, and from the 88 suburban in preparation for the swap, but I ended up with a hydraulic lockup kit in the trans when I had it built, so I didn't use any of it. If you need any of it let me know and you can have it. I ended up using the flex plate from the 84. The difference in the plates is dependant on having a 1-piece or a 2-piece rear main seal.

 There's also a link around here somewhere that shows you how to make your own lock up kit, from 73-87.com.

edit: http://forum.73-87chevytrucks.com/smforum/index.php?topic=16459.0
there's my swap thread. It worked out perfectly in the end
Title: Re: Transmission swap stick to 700R4
Post by: Grim 82 on February 17, 2011, 09:42:53 PM
http://www.73-87.com/7387garage/drivetrain/lockup.htm