gnatsum 12 Report post Posted May 14, 2019 I have a project car 69 Mach with a 351W from an 87 Bronco, and a C6 from an early 80s van. The shifter goes through the gears fine but it won't change gears. I have never run the engine and transmission combination yet, since this is a new build. The engine starts and idles just fine, however the transmission doesn't even sound like it's shifting into gear. I initially put about 7 quarts of transmission fluid into the transmission, then checked the dipstick which was pretty full. I assume you have to run the engine for a while in order to distribute the fluid into the transmission? I obviously still have at least 3 or 4 quarts of transmission fluid yet to add. I have run the engine for a few minutes here and there, however since I do not have the full exhaust on, I am hesitant to keep running it. I do have long tube headers on so I think it should be fine to run it longer if needed. Can anyone tell me how long I need to run it in order to disperse the transmission fluid enough so that I can add the remaining fluid in? Or are there any other thoughts on this issue? Quote Share this post Link to post Share on other sites
jmlay 80 Report post Posted May 14, 2019 Did you fill the converter when you installed it or is it dry? Quote Share this post Link to post Share on other sites
gnatsum 12 Report post Posted May 14, 2019 No, it was dry. Quote Share this post Link to post Share on other sites
1969_Mach1 333 Report post Posted May 14, 2019 You should never install a torque convertor dry. It's doesn't need to be full, but needs to have at least 1 qt. of oil in it. Aside from that, I think your trans is simply not full enough yet. They will start acting strange when just 1 qt. low. Quote Share this post Link to post Share on other sites
gnatsum 12 Report post Posted May 14, 2019 Ok thanks. I'll let it run a while. Quote Share this post Link to post Share on other sites
