I was at my mechanics shop today checking the the 408 and we have a slight problem. When the baby C-6 is bolted on to the engine block there is less than a quarter inch space between the tranie and the block. In other words it is not absolutely flushed/sealed to each other by the bolts and they are torqued all the way in? He was asking me about the baby c-6 and the only difference I know about them and a regular c-6 is the tail shaft is shorter. I don't thing the front bolt up part of it has anything to do with why it won't fit properly. My question to you guys is it possible the torque converter is not right and just less than a quarter inch to long so it won't fit down into the lip of the gears? I took pictures but am having a hard time trying to load them up. Anyway, any ideas or suggestions would be greatly appreciated. Btw, I should mention that the converter was custom made. thank you. james comet
Baby C6 is the nickname for a C6 with the small block bell. They are exactly the same as other C6s in every other way. To put one in a Mav, you would need a custom fabbed tranny crossmember, custom driveshaft, and the firewall/tunnel needs expanded from what I hear. If your tranny is not seating flush with the back of the block, you might look at the dowel holes and make sure there is no blockage. You might also find the TC bolts may be the wrong pattern for your flexplate. C4 and C6 plates do not swap. Good luck Dave
Thanks for that but I don't think the crossmember, driveshaft, firewall/tunnel is the problem. In fact the drive shaft etc is not even connected. Also the flex plate is a c-6 plate and we know the plates don't swap. Regarding the dowel holes the mechanic tried three times to bolt it up and it just is less than 1/4 inch from tighting all the way? Is it possible to be the torque converter? I do know that tommorow he is taking it out again and is going to try another converter. I really hope this is the problem because especially money wise because there are not that expensive. Thanks again Dave. james comet
Yes, sounds as if you cant close the gap due to the converter. I would take out the converter and see if the gap is closed then. Also, are you sure the converter is seated? Dan
Rapidly spin the convertor by hand while pushing in ... If I recall on a C4 it drops down like 2 or 3 times before being completely seated ...
Was the previous tranny a manual? If so, check for a left over Pilot Bearing in the block. <-- guilty
The converter mates against the pump gear in the tranny (at least on a C4 it does, which is probably the same). The input shaft length shouldn't cause that problem. Check the distance from the end of the converter to the mating surface with the flexplate and find out if the converter is the right size. I had the same problem with mine and it turned out that the pump gear was on upside down, which caused the converter to stick out more. The guy that sold me the custom converter kept telling me that my converter was not all the way seated and to hammer it in. He said new converters are tight and can be difficult to get fully seated.
Bingo? Bingo, the input shaft is a quarter inch to long. My mechanic just called and told me. Whew, I'm glad because the problem is now easy to remedy. Thank you all for your suggestions, ideas and help. Keep up the good work and when this "bad boy" is done y'all will be the fist to see the pictures. james comet
