I've got a 68 Lark w/ pg, 4 bbl, can anyone tell me what the rear ratio would be for this? I assume its the orig 8.2.
the best way on a non-posi unit to check with no special tools is .... park the car on a flat surface. chock the front tires. put the car in nuetral. jack one rear tire off of the ground. place a jack stand under the car for safety. as you turn the tire exactly TWICE, carefully count the driveshaft revolutions . if you get just under 3 1/4 turns, the ratio will be 3.23-ish, a little over 3 1/4 will be a 3.31, a little over 3 will be a 3.08, a little under 3 will be 2.93, a little under 3 3/4 will be a 2.73 ... etc. etc. here is why you have to turn the tire twice ... with the other tire on the ground as you turn the tire thats in the air ... the spider gears in the rearend cut the driveshaft revs exactly in half. its like ... did you know that when you peel out with a car that only has one tire spinning that the spinning tire is turning TWICE as fast as the spedometer says (minus what little speed the other tire actually might be rolling). so if you are at a dead stop and you punch it and the speedo jumps to 60 mph and you havent started moving yet ... that tire is spinning 120mph .... no wonder it cant get any traction in those situations. :Smarty:
