TH350 to 700R4 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Shon Herron · 05-03-2002, 01:23 PM

I am wanting to swap to the 700R4 in my '71, can you point me to what is needed for this swap, I have the trans, what else?

This is a stock '71 with 83k miles on it. I feel sure that a stock 700R4 should last behind this old mill...thanks!

------------------
'71 Cheyenne 83K Original Miles.

bigvinnie · 05-03-2002, 02:23 PM

If you've got the trans and converter, all you need to do to install it is move the trans x-member back about 2 inches... you'll see exactly how much once you get the trans bolted to the motor. Then just mark and drill new holes.

If you want the trans to lock-up for hiway driving, you need the proper wiring... I think jegs or summit sells a lock-up kit... get an external trans cooler while you're at it, your 700 will thank you for it.

The most important thing is to make sure your TV cable is adjusted properly... I set mine to max out at WOT and have had no problems... I'm sure someone on the board knows the exact procedure..???

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'72 short step, 350, 700R4, tilt, ps, pdb, a/c, lowered coils, etc., other work in progress... San Diego, CA
http://www.ixpres.com/vlusardi/chevtrk.htm

busterwivell · 05-03-2002, 10:36 PM

If your 350 has 9 inch tail, you'll be ok, but I'd be REAL SURE THE TV CABLE STUFF IS DONE RIGHT, or you could be putting your 350 back in.

Longhorn Man · 05-04-2002, 12:55 AM

The TV cable should be left to a pro....that or go buy the oil pressure guages and fittings and read up on it.
The TV controls more than kick down, it also does fluid pressure and shift points along with firmness.
If it isn't done right, it'll go out in 2500 miles or so.
Your drive shaft should be needing shortened too.
You'll have no speedo onless you can find the conversion kit. I had a link, but lost it. It has an electric speedo, and ours is not.
Did I forget anything?

------------------
'69 G.M.C. 350/350. Trying to clean up the left over damage from the Dope-Smokin-Old-Man
I've been dubbed the Longhorn Freak/Fanatic/Expert, I just hope I can live up to it.
FINALLY got the HORNIAC...a '70 one ton Longhorn with a Pontiac 350/350 and lots of 'personality'. Check out The Longhorn Webite.
If you need a pic posted, E-mail me at longhornmail@yahoo.com
Andy, in Columbus Ohio

05-03-2002, 01:23 PM	#1
Shon Herron Registered User Join Date: May 2002 Posts: 1	TH350 to 700R4 I am wanting to swap to the 700R4 in my '71, can you point me to what is needed for this swap, I have the trans, what else? This is a stock '71 with 83k miles on it. I feel sure that a stock 700R4 should last behind this old mill...thanks! ------------------ '71 Cheyenne 83K Original Miles. __________________ '71 Cheyenne 83K Original Miles.

05-03-2002, 02:23 PM	#2
bigvinnie Registered User Join Date: Aug 2001 Location: escondido, ca 92026 Posts: 1,222	If you've got the trans and converter, all you need to do to install it is move the trans x-member back about 2 inches... you'll see exactly how much once you get the trans bolted to the motor. Then just mark and drill new holes. If you want the trans to lock-up for hiway driving, you need the proper wiring... I think jegs or summit sells a lock-up kit... get an external trans cooler while you're at it, your 700 will thank you for it. The most important thing is to make sure your TV cable is adjusted properly... I set mine to max out at WOT and have had no problems... I'm sure someone on the board knows the exact procedure..??? ------------------ '72 short step, 350, 700R4, tilt, ps, pdb, a/c, lowered coils, etc., other work in progress... San Diego, CA http://www.ixpres.com/vlusardi/chevtrk.htm __________________ '72 short step, 350, 700R4, tilt, ps, pdb, a/c, lowered coils, etc., other work in progress... San Diego, CA 72 Stepside Project

05-03-2002, 10:36 PM	#3
busterwivell Registered User Join Date: Jan 2002 Location: Sahuarita, AZ USA Posts: 2,033	If your 350 has 9 inch tail, you'll be ok, but I'd be REAL SURE THE TV CABLE STUFF IS DONE RIGHT, or you could be putting your 350 back in. __________________ Bill - Tucson, AZ 47 Chevrolet 2 dr sedan 56 Chevrolet 210 2 dr sedan 66 Chevrolet Malibu 2 dr 4 speed 71 Chevrolet C30 Longhorn 86 Chevrolet Monte Carlo SS (Sold) 01 Chevrolet Tahoe IM - BUSTERWIVE@aol.com

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05-04-2002, 12:55 AM	#4
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	The TV cable should be left to a pro....that or go buy the oil pressure guages and fittings and read up on it. The TV controls more than kick down, it also does fluid pressure and shift points along with firmness. If it isn't done right, it'll go out in 2500 miles or so. Your drive shaft should be needing shortened too. You'll have no speedo onless you can find the conversion kit. I had a link, but lost it. It has an electric speedo, and ours is not. Did I forget anything? ------------------ '69 G.M.C. 350/350. Trying to clean up the left over damage from the Dope-Smokin-Old-Man I've been dubbed the Longhorn Freak/Fanatic/Expert, I just hope I can live up to it. FINALLY got the HORNIAC...a '70 one ton Longhorn with a Pontiac 350/350 and lots of 'personality'. Check out The Longhorn Webite. If you need a pic posted, E-mail me at longhornmail@yahoo.com Andy, in Columbus Ohio



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