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

68K30 · 01-21-2010, 10:30 AM

I have a 700R4 and a NP205 behind my 454 in my 68 K-30I moved the crossmember and the transfer case frame mount back 5/8", redrilled afew holes and that was it. There was enough travel in the splines the make up the difference, I have a 14 bolt rear and a non-standard driveshaft in the front, but it was an easy swap. The TV cable adjustment is critical and was a little tricky on the big block,after market tv bracket and som engineering but it works, the lockup is real easy, find a 1984 or 1985 Chevy truck or suburban and get the vacuum switch that is mounted by the brak booster, the brake switch under the dash and the plug on the trans and find a schematic for the 85 truck, real simple install and it works great.

Hope this helps
Bill

68K30 · 01-21-2010, 11:20 AM

In my last post I forgot to mention that I also installed the Advanced adaptors shorter output shaft.

big dump · 01-22-2010, 01:04 PM

That makes more sense, thanks. Almost done with this swap, just waiting on the lock-up wiring, which should be here today, and have to install/adjust the TV cable. I really don't like projects like this, under the vehicle, crap falling in your face. Be glad to have this one finished up. Pictures to come..

Wildstreak · 01-22-2010, 01:33 PM

Quote:

Originally Posted by big dump

I really don't like projects like this, under the vehicle, crap falling in your face. .

me too, when I can, Im just going to trailer it to a mechanic to adjust the tv cable properly. Ive heard it was really hard to do. But if you do it and its not so bad I might giver er a try :P

big dump · 01-22-2010, 01:55 PM

I don't know, because I don't have experience with it yet, but I would suspect that it's a matter of knowing what the distance of travel is for the cable that pulls the plunger, and making sure that at WOT that amount of travel is achieved. I was planning on measuring the travel in the cable, then setting the distance on the throttle side to match. I think that would get me in the right area, then it's probably just a matter of test driving/adjusting. The TV cable has a good bit of adjustment on it by depressing the D-shaped button on the side. Someone chime in if I'm way off on this..

Dusty71blazer · 01-22-2010, 09:32 PM

What are you using to connect the cable to the carb, this has to be specific too, like in this picture...
Name: gm_tv_fig2.gif
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Here are a few links that I have bookmarked on this...

http://www.purplesagetradingpost.com...o/700R4p1.html
http://www.tciauto.com/Products/Inst...ble_adjust.htm
http://www.cpttransmission.com/tech_tvcable.htm

Happy reading

Dusty71blazer · 01-22-2010, 09:39 PM

Here is some more info & a linkage kit that's supposed to make it easy, kinda pricey.... not sure if I'll go this route when I get around to doing this swap, depends on how much $$$$ I have to spend..

http://www.tvmadeez.com/

01-21-2010, 10:30 AM	#1
68K30 Registered User Join Date: May 2007 Location: Pennsylvania Posts: 99	Re: TH350 to 700R4 I have a 700R4 and a NP205 behind my 454 in my 68 K-30I moved the crossmember and the transfer case frame mount back 5/8", redrilled afew holes and that was it. There was enough travel in the splines the make up the difference, I have a 14 bolt rear and a non-standard driveshaft in the front, but it was an easy swap. The TV cable adjustment is critical and was a little tricky on the big block,after market tv bracket and som engineering but it works, the lockup is real easy, find a 1984 or 1985 Chevy truck or suburban and get the vacuum switch that is mounted by the brak booster, the brake switch under the dash and the plug on the trans and find a schematic for the 85 truck, real simple install and it works great. Hope this helps Bill

01-21-2010, 11:20 AM	#2
68K30 Registered User Join Date: May 2007 Location: Pennsylvania Posts: 99	Re: TH350 to 700R4 In my last post I forgot to mention that I also installed the Advanced adaptors shorter output shaft.

01-22-2010, 01:04 PM	#3
big dump Registered User Join Date: Mar 2006 Location: Gilbert, AZ Posts: 179	Re: TH350 to 700R4 That makes more sense, thanks. Almost done with this swap, just waiting on the lock-up wiring, which should be here today, and have to install/adjust the TV cable. I really don't like projects like this, under the vehicle, crap falling in your face. Be glad to have this one finished up. Pictures to come.. Last edited by big dump; 01-22-2010 at 01:07 PM.

01-22-2010, 01:55 PM	#5
big dump Registered User Join Date: Mar 2006 Location: Gilbert, AZ Posts: 179	Re: TH350 to 700R4 I don't know, because I don't have experience with it yet, but I would suspect that it's a matter of knowing what the distance of travel is for the cable that pulls the plunger, and making sure that at WOT that amount of travel is achieved. I was planning on measuring the travel in the cable, then setting the distance on the throttle side to match. I think that would get me in the right area, then it's probably just a matter of test driving/adjusting. The TV cable has a good bit of adjustment on it by depressing the D-shaped button on the side. Someone chime in if I'm way off on this..

01-22-2010, 09:32 PM	#6
Dusty71blazer Registered User Join Date: Nov 2009 Location: Sioux City, IA Posts: 158	Re: TH350 to 700R4 What are you using to connect the cable to the carb, this has to be specific too, like in this picture... Here are a few links that I have bookmarked on this... http://www.purplesagetradingpost.com...o/700R4p1.html http://www.tciauto.com/Products/Inst...ble_adjust.htm http://www.cpttransmission.com/tech_tvcable.htm Happy reading __________________ Dustin '97 Dodge Ram (daily driver) '71 Blazer (supposed to be a toy... insists on being a project) '85 Monte Carlo SS (project)

01-22-2010, 09:39 PM	#7
Dusty71blazer Registered User Join Date: Nov 2009 Location: Sioux City, IA Posts: 158	Re: TH350 to 700R4 Here is some more info & a linkage kit that's supposed to make it easy, kinda pricey.... not sure if I'll go this route when I get around to doing this swap, depends on how much $$$$ I have to spend.. http://www.tvmadeez.com/ __________________ Dustin '97 Dodge Ram (daily driver) '71 Blazer (supposed to be a toy... insists on being a project) '85 Monte Carlo SS (project)



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