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Thinking of going to auto trans. Has any body done this. I have a 67 coup four speed.which one a 200r4. Or700r4. Would which one would be the best.have a 406 about 475 hp.
67 Coupe: No Modifications needed
Just did it! TH350C (MX2) build for a 450 range HP....Unheard of for an L71. Most definitely not Factory standard OR optional for a 435HP. A good Corvette Guy could bring back to stock with no issues....Purchase, build and installation including, flywheel, starter and shifter.....
Good Luck!
Fit like a glove! BUT a lot of work, and a lot of saved parts..... Prep work! Shiftworks Shifter maintaining the Manual shift plate with a custom Saddle leather boot.....Auto Consoles are ridiculously priced, like everything else....
Thinking of going to auto trans. Has any body done this. I have a 67 coup four speed.which one a 200r4. Or700r4. Would which one would be the best.have a 406 about 475 hp.
Everyone that does this converson has their
favorite tranny. I use a 700r racing transmission,
built by FTI with a Yank 3000 torq converter, with a
manuel lockup (4 th gear). I rebuilt the driveshaft, but, it did
not need to be shortened. The transmisson tunnel needed to be
cut some, for the shifter, and the crossmember was altered. I do run a
extra tranny cooler ( your choice for location). You do need to
change the pedal, no clutch. I had to string, a TV cable, but that
was not to much. I had a Doug Nash 4 speed, before, I made the
change. I am probably missing something but you get the picture.
good luck
"I rebuilt the driveshaft, but, it did not need to be shortened."
Just checking--is that what you meant to say.?
As I recall from what I've read, the driveshaft DOES need to be shortened (I don't know how much) to use a 700R4, but does not need to be shortened with a 2004R.
If I'm wrong, I'm always happy to learn something new.
"I rebuilt the driveshaft, but, it did not need to be shortened."
Just checking--is that what you meant to say.?
As I recall from what I've read, the driveshaft DOES need to be shortened (I don't know how much) to use a 700R4, but does not need to be shortened with a 2004R.
If I'm wrong, I'm always happy to learn something new.
Different transmissions and you may need, to shorten the
drive shaft. I did not need ,to shorten, my driveshaft but
it needed rebuilding.
Different transmissions and you may need, to shorten the
drive shaft. I did not need ,to shorten, my driveshaft but
it needed rebuilding.
One thing to remember.As others have said, these old
cars were built, and, back when, tolerences were not as
close as it is today. Always measure, what worked for me ,may
not work for you. Measure and be sure.
Thinking of going to auto trans. Has any body done this. I have a 67 coup four speed.which one a 200r4. Or700r4. Would which one would be the best.have a 406 about 475 hp.
Here is a link to a recent thread where opinions about which transmission is "best" were all over the map. I suggest that you carefully read the entire thread to understand the pros and cons for each option. Some people say the 2004R is not strong enough for 475 hp, while others claim it can be built for that level of power.
The short summary is that the 700R4 is a pure bolt-in swap from Bowtie Overdrives, other than requiring a shorter drive shaft. If you don't want to shorten your stock drive shaft, you can order a custom one from Fast Shafts, or possibly use one of their pre-made lengths available online at Summit Racing.
The 2004R can use your stock driveshaft, but the location of the rear mount is not compatible with the stock C2 crossmember, so some fabrication is required. Some solutions are documented in the above thread.
If you decide that you prefer a 700R4 over the 2004R, I would suggest getting the computer-controlled version of the 700R4, which is called the 4L60E. It's basically a 700R4 with electronic shift control. Some people have trouble getting the 700R4 to shift as desired, due to the mechanical TPS on the 700R4 (Throttle Position Sensor). The electronic shift control of the 4L60E is much easier to optimize.
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