Today I did a fluid change on my 54..4spd, and rear end..My truck has been changed to an open driveline, with a center bearing on a 1/2 ton..Don't ask me, I went through this before here..Anyway, my shop manual says the capacity for the rear end is 4pts..Well, mine took 5..Is there a possibility that when the driveline was changed that the rear end was too..If I can get some numbers, which I have no idea where they might be, where can I find out if it's an original 54?..Thanks Ya'll, Steve..Also, If someone has a 54 with a 4spd with a straight open driveshaft, could you measure the u-joint to u-joint dimension, so I can maybe get rid of this setup and go with a straight driveshaft..
