Northstar Engines and System Technical Discussion Discussion, Changing final gear ratio in Cadillac Engine Technical Discussion; I apologize if this is in the wrong section - but I couldn't find any tranny-specific one... Anywho, how much ...
I apologize if this is in the wrong section - but I couldn't find any tranny-specific one... Anywho, how much work is it to change the gears from a 3.11 tranny to 3.73 gears?
It isn't the simplest nor easiest job but it is possible to remove the complete final drive assembly from the trans while the trans is in the car. The tail housing of the trans comes off after removing the wheel/tire, knuckle, drive axle, etc... then the final drive can be removed and replaced.
If you replace the existing final drive with a 3.71 ratio the PCM cal that you have will not recognize this and will set some codes as it will think the trans is incorrect.....
I'm right in the middle of the swap. How in the **** do I remove the HUGE snap ring holding in the large gear? The one that's 8" in diameter, and 1/4" thick!?! I assume I need to compress it somehow to remove it from the grooev, but with what!?!
How do you get the PCM to still control line TV (for lack of a better term) pressure when taking shift control away from it? It will set a code if it isn't in the gear the PCM wants, after all. How much do you want for the paddle shift set up? Email me at firstname.lastname@example.org, if you would.