350 to 700r4 sawp

[kris's66lwb]

hey yall i want to swap my 350 for a 700 r4 what do i need to have or modifyly to make this happen i have a 2wd lwb 1980 chevy and a 700r4 out of a 86 chevy swb with a 4.3 whats the magic i need

[bucannon]

if the transmission your replacing was a long tailshaft then its basically bolt in but if it is a short shaft youll need to shorten the driveshaft.

[kris's66lwb]

cool thanks man one more question what is the measurment on the long shaft v. the short

[Slonaker]

Maybe this will help:



Slonaker

[olblue81]

If your truck is lowered and you have a long tailshaft 350 you will need to shorten your drive shaft. It was an unsuspected surprise when I put my 4" lowering on last fall.

I never wrote down how much i needed to shorten mine when I lowered the truck so you would have to measure.

[kris's66lwb]

ya mine is bone stock i just need that extra gear to get me places in an effecint manner i drive mine every day

[kris's66lwb]

so basicly the 700 is gunna be roughly 30 inches long and to make a direct swap i need the 350 with a 9 inch tail to make the shaft fit

[steemin_ehman]

Look into the T.V. Cable hook-up (commonly mistaken for a kick-down cable). Geometry of the bracket is extremely important for proper shift-points, transmission behaviour and reliability.

you can make your own bracket, or order one to adapt your existing trottle bracket to the proper geometry for the 700r4. If you dont do this, you will burn up your tranny. There's adaptor brackets available for all sorts of carbs/throttle bodies that usually run around $60, and are super easy to install. Even possibly taking the throttle bracket off the 4.3L and getting it to fit your engine's carb would work. Also be sure to take the cable mounting bracket (however, it should fit/clip in the same place a T350 kickdown cable does anyway)

Go here for some good info:
http://www.tvmadeez.com/article/index.php
http://purplesagetradingpost.com/sum...o/700R4p1.html

Once everything is in place, its simple to set up! You just adjust it so the T.V. cable is fully pulled out/extended at WOT (Wide open throttle).

As well, find out if its a locking torque converter or not... if it is, its simple to wire in (its an electric solenoid) and the schematic can be found lots of places. You could also rob that off the donor truck (if equipped). Done deal.

[HOGDADDY]

From what I have been told , a v6 700r4 is not the same as a v8 700r4 there are differences but I am unsure exactly what it is but it might be wise to do a little research beforehand.

[bucannon]

Originally Posted by HOGDADDY

From what I have been told , a v6 700r4 is not the same as a v8 700r4 there are differences but I am unsure exactly what it is but it might be wise to do a little research beforehand.

the main difference is how much horsepower it can handle

[steemin_ehman]

I have a buddy that did a 350 swap (mild) in an s-10 that originally had a 4.3 v6. He had no issues at all with his factory 700r4 tranny after setting it up properly. For this specific install, there shouldn't be any issues with fitment or having too much power for the 700r4.

[kris's66lwb]

ok so the tourqe convertors are gunna fit the same

[steemin_ehman]

Originally Posted by kris's66lwb

ok so the tourqe convertors are gunna fit the same

Yes, the bolt pattern on the 700r4 torque converter is the same as a T350. The only difference is that the bolts sometimes need to be metric... I'm not 100% sure if all years of 700r4 are metric or not.

[kris's66lwb]

ok sweet guys thanks for all your help

[kris's66lwb]

so how can i set up the tv cable in a good manner

[gchemist]

Which carb are you using?
TV cable adjustment: http://www.73-87.com/7387garage/drivetrain/tvcable.htm

[kris's66lwb]

rochester q jet