![]() |
![]() |
#1 |
Registered User
Join Date: Jul 2010
Location: Oceanside, CA
Posts: 53
|
Transmission thoughts
So I'm currently running a auto 3spd stock tranny, but i'd like to get something with overdrive to make freeway driving easier, like a 700r4. I know these are common for 67-72 pickups, what mods are required to make this fit? I've heard you have to shorten the driveshaft, and some guys like to use tranny coolers. Also, has anyone bought the $500 deals on CL? I see a lot in my area for this price.
|
![]() |
![]() |
![]() |
#2 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
|
Re: Transmission thoughts
you will need;
tranny converter TV cable provisions to (properly) hook the TV to carb converter lockup kit trans cooling lines radiator with cooler new sterter possibly (never personally messed with a 3 speed, may have the same part) New steering column or floor shifter small wire job to make back up lights work some will say a neutral safety switch, I say screw that, just put it in park if it's not moving or running auto tranny crossmember tranny mount A case of ATF Speedometer gears that match your rear end ratio possibly new driveshaft yoke driveshaft mods |
![]() |
![]() |
![]() |
#3 |
Registered User
Join Date: Oct 2005
Location: Overland Park, Ks.
Posts: 5,218
|
Re: Transmission thoughts
I see you already have an auto in it. The starter, Radiator, & cooler lines should work. The column shifter will work with a little mods at the bellcrank but you might not have a lockout position for first gear, which you never need unless you do some serious mountain driving. You can move the trans. crossmember back & drill new holes. If you have a 200-350 in it now the yoke will fit. If you have a 400 you will need a different yoke. The drive shaft will need to be modified.
This is a great swap. I run one in my 70 & it is a pleasure to drive. 70-80 MPH is cruiseing. |
![]() |
![]() |
![]() |
#4 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
|
Re: Transmission thoughts
i missed that... I thought I read 3 speed as in manual.
|
![]() |
![]() |
![]() |
#5 |
Registered User
Join Date: Jul 2010
Location: Oceanside, CA
Posts: 53
|
Re: Transmission thoughts
I was referring to an auto transmission...and thanks for all the advice, I think it's a TH350, and I wanted to make it a floor shift with the Lokar shift kit anyway as far as that goes.
|
![]() |
![]() |
![]() |
#6 |
Registered User
Join Date: Aug 2010
Location: San Diego, CA
Posts: 128
|
Re: Transmission thoughts
Anybody use a 2004R instead of 700R4? The case is a little shorter, so I'm wondering if it still requires a drive shaft modification. A 2004R should be able to be built to handle the same horsepower and torque as the 700R4.
I have a Th350 now and am considering a swap also. |
![]() |
![]() |
![]() |
#7 |
Cruzin
Join Date: Dec 2009
Location: on the road
Posts: 2,835
|
Re: Transmission thoughts
from what i understand a 200 is more the size of a 350 as length goes, i have a 700 in my 71 and like it so far
__________________
Lime Wife's 67https://www.google.com/url?sa=t&rct=...wZEMODaS2d94u8 Back to the Fifties 59 https://www.google.com/url?sa=t&rct=...NAeStpydfrcj_U Proverbs 3:5,6 "Thanks to the Interstate Highway System, it is now possible to travel across the country from coast to coast without seeing anything."Charles Kuralt In memory of our first baby daughter, daddy and mommy love you. Danica Grace 6/26/14
|
![]() |
![]() |
![]() |
#8 |
Gearhead
Join Date: Jan 2008
Location: Colorado
Posts: 1,193
|
Re: Transmission thoughts
If you run a 700R4, I would also recommend an external trans cooler in addition to the radiator cooler. I ran mine w/o one for awhile and feel it would get pretty hot in stop-n-go traffic. I do love my 700R4 though, great first gear and awesome when the convertor locks up... my only complaint is the gap between 1st and 2nd gear, but I believe that the 200R does not have this problem.
__________________
2002 Saturn SL2, My D/D 2019 Ford Fusion SE, Ecoboost - Wife's D/D 1993 Camaro Z28, A4, CAI, Cat-Back Exhaust Project C10 (my 72' C10 w/96' LT1, 700R4, bagged F&R, 18's (for now), Short/Fleet) -- SOLD! Build Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=313644 |
![]() |
![]() |
![]() |
#9 |
Registered User
Join Date: Nov 2001
Location: Concord, NC
Posts: 2,489
|
Re: Transmission thoughts
200-4r is the way to go
|
![]() |
![]() |
![]() |
#10 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
|
Re: Transmission thoughts
the 200 4R is a tick longer than the short shaft TH350 (what our trucks came with) and the crossmember goes in the TH400 location. So physicly installing it is a nuts and bolt job.
You do still have to set the TV cable, and that can be a nightmare. I recomend spending the cash and going to bowtieoverdrives.com and getting there kit. It's expensive, but so is a replacement tranny if the cable isn't dead nuts right. |
![]() |
![]() |
![]() |
#11 |
Truck and auto performance nut
Join Date: Feb 2007
Location: McKinney,Texas
Posts: 3,848
|
Re: Transmission thoughts
I bought TCI's "geometry corrector" bracket that bolts to the carb linkage and my trans builder provided a nice TV cable...but to keep my set uniform I think I'll be using a Lokar TV cable to go with the Lokar throttle cable and bracketry. I also have 200-4r bracket...but its made for OEM style (like the cable my trans builder gave me) with square type openings for the cables.
Thats what you're getting going with Bowtie Overdrives...uniformity in that everything works together. Had I bought all TCI or all Lokar hardware...maybe I wouldn't be looking at making changes. ![]()
__________________
Kurt - '68 GMC short step - NIB '09 LY6 6.0L crate motor w/mods, NIB '12 crate 4L85e w/billet 3k stall Circle D, 3.73 posi 12 bolt, DynaTech f-swap headers, 3/4 drop, handling mods, etc. - my toy '72 Chevy LWB C-10 Highlander - 350/350 ps/pb/tilt/ac - not original but close '06 Chevy TrailBlazerSS - LS2/4L70e - little black hot rod SUV - my DD '18 Kia Sorento - wife's econo-driver '95 Chevy S10 - reg cab shortbed, LS, 4.3, auto... my '68's powertrain and chassis build -links broken A surprise phase - carb to efi -links broken Last edited by 68GMCCustom; 02-01-2011 at 11:54 PM. |
![]() |
![]() |
![]() |
#12 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
|
Re: Transmission thoughts
plus they set you up with a pressure guage and detailed instructions on how to use it.
|
![]() |
![]() |
![]() |
#13 |
Senior Member
![]() Join Date: Dec 2003
Location: Pampa, Texas
Posts: 1,554
|
Re: Transmission thoughts
So educate me... What is a tv cable and what does it do??
Posted via Mobile Device
__________________
https://www.ebay.com/itm/29620574751...mis&media=COPY |
![]() |
![]() |
![]() |
#14 |
Registered User
Join Date: Oct 2005
Location: Overland Park, Ks.
Posts: 5,218
|
Re: Transmission thoughts
I think it stands for throttle valve. Someone correct me if i'm wrong. It is a cable that connects the throttle to the trans. to control the pressure. It must have the right geometry & adjustment or the trans will not work right or last long. It is used on the 200-r4 & the 700-r4 trans. The 350 & 400 used vacuum modulators to control it.
|
![]() |
![]() |
![]() |
#15 |
Gearhead
Join Date: Jan 2008
Location: Colorado
Posts: 1,193
|
Re: Transmission thoughts
Correct, the TV cable controls the fluid pressure in the tranmission and if Im not mistaken also controls the timing of upshifts and the "kick down" abilities of the trans. I had mine set incorrectly the first time I drove it and the trans would not part throttle upshift until apx 4K RPM, I also HIGHLY recommend you get the Bowtie Overdrives kit and also source your (mechaincal) speedo gear/housing set up from them. Very knowledgeable, courteous and they know what works.... I wish I would have bought my TV set up from them, regrets...
__________________
2002 Saturn SL2, My D/D 2019 Ford Fusion SE, Ecoboost - Wife's D/D 1993 Camaro Z28, A4, CAI, Cat-Back Exhaust Project C10 (my 72' C10 w/96' LT1, 700R4, bagged F&R, 18's (for now), Short/Fleet) -- SOLD! Build Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=313644 |
![]() |
![]() |
![]() |
Bookmarks |
|
|