12valve1stgen

i just bolted up a srw dana 80 on my truck, i had the driveshaft shortened and ran into another problem, the rear disc brakes wont engage when i push the brake pedal in, so my question is why arent they working? could it be the master cylinder? or maybe a 2nd gen proportioning block is needed? any input would be appreciated

12valve1stgen

anyone?

stackx2

i would help you out but i dont know for sure. I dont know why anybody hasnt posted after 4 hours. are you getting any brake fluid to the calipers or the wheel cylinders(dont know if it disc or drum)

Jer12377

Wanadiesel told me a few weeks back in the Thursday night chat room, that he thought the master cylinder had to be changed also. I don't want to quote him on that as it was weeks ago. If you haven't read already read I am trying to get as much info on this swap also for my 93 W350. One of us should do a right up when we are done for the sticky as there doesnt seem to be much detailed info out there on the swap.

stackx2

i just thought of somebody that i know by me that is on this site that has put a dana 80 in his truck, his screen name is Ron A pm him he would know what to do

Flake

Are the rear calipers seized?
How does the brake pedal feel?

NO_SPRK

need upgraded master and proportioning valve

jimbo486

the master cylinder doesn't put out the pressure the calipers need to compress the pads against the rotors. i read about this elsewhere and there were numbers i found as well. don't know them off the top of my head but to apply drum brakes required a significantly lower pressure.

wannadiesel

What he said.