I have a 72 chev with a 350 engine and 350 trans. This is a Fleetside 2WD.
It will soon have a new warmer engine but not anything too radical. The
engine will have an Edelbrock Performer and a Holley 650 Street Avenger and
a mild Crane cam. I want to put in an overdrive transmission to get better
highway milage. I had planned to go to a salvage yard and pickup either a
good trans or a good core and have it rebuilt. Thought I wanted a 700R4.
Any suggestions on year or model might be the best for a non computer
vehicle? I understand there are solutions to the problems of making this
transplant. First of all what are the problems and what are the work
arounds? I am willing to do some basic wiring and even a different
driveshaft / trans mount if needed. What adapter kits are available? I
have read in different posts that the first ones built from 1982 thru 1986
had problems/weaknesses that were fixed with the 87 and newer units. What
were the problems? Then I understand that in the 90's sometime they changed
the name of the 700R4 to 4L60. Then came the electronic 4L60E. Do I have
my facts straight? What would be the best way to go on picking out a trans
for this truck? Are there part numbers on the trans to pick out the best
years or other physical characteristics? Any tips on a replacement torque
Thanks a bunch in advance. This will be a daily driver.
I put a 700R4 in my 69 C10.
I moved th crossmember back and drilled new holse for the bolts.
I had the driveshaft shortened.
I bough the trans from a trans dealer.
Here in the Fort Worth area there are probably 4-5 dealers who sell them
Should be similar for any midsized city.
William G. wrote:
Yes, I have a very simple control for the lockup converter.
I copied the 83-84 Chevy pickup system.
There are also quite a few vendors who offer control setups for the 700R4.
If you want to take advantage of the capabilities of the 4L60E, ther are
also several vendors who offer controllers for this version of the trans
in addition to GM.
I suspect you are concerned about the year of manufacture because of the
"common knowledge" that early 700R4s have some weak points. This only
applies to transmissions built by GM. The quality of any aftermarket
transmission is controlled by the builder. Any recenctly built 700R4 by
a reputable builder will be equivalent or better than the later-model GM
William G. wrote:
Go to bowtie overdrives.com they have all of the parts that you need to
convert to an overdrive transmission. I put a 2004r in my 72 GMC that
came stock with a turbo 350. The 2004r is the same length as the 350
turbo and it takes the same driveshaft spline as the 350. So you dont
have to move the crossmember.
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.