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14bff swap, disc brakes, and line locks

jonathon

jonathon

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Well, I may end up with a free 14bff with 4.10's in it. My neighbor has a 77 K20 with a D44 and 14bff with 4.10s. The truck has a dead TH400 with an NP203 attached, so it's just sitting.

Anyways, what I need to know is brakes..... I know GM changed the parking brake cable arrangement around 79 or 80. Do the new and old interchange, to the point at least where I can unhook the hold ones and install newer ones? Also, will my rear brake line bolt up?

My truck currently has a 14bsf in it... he wants my axles for the higher gears since his new truck, and 82 k20, has 4.10s as well and doesn't do well on the highway.

The other option is to swap axles with the 82 and I know that'll bolt up...

Maybe I'll try to buy the whole 77 off him :haha:
 
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You will need backing plates from the newer year trucks. I found this out the hard way myself last year.

Brake line should be good.
 
desertrat67 said:
You will need backing plates from the newer year trucks. I found this out the hard way myself last year.

Brake line should be good.
Click to expand...


So the backing plates changed as well? Did the drums?

It looks like that on the 88 to 98 trucks they use a similar cable setup for the 14bff as my 1991 Suburban does. Think something that new will work?

Heck, I might just go discs and carry wheel chocks around till I can afford to the SYE and driveline brake :haha:
 
jonathon said:
So the backing plates changed as well? Did the drums?

It looks like that on the 88 to 98 trucks they use a similar cable setup for the 14bff as my 1991 Suburban does. Think something that new will work?

Heck, I might just go discs and carry wheel chocks around till I can afford to the SYE and driveline brake :haha:
Click to expand...

Well since I bet you go to discs anyways..... LOL why not!?:haha:
 
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The difference in the two is one(the newer style) uses a circular clip to hold the cable into the backing plate while the older style bolt onto the backing plate. When you unbolt the older style there is a larger hole than what he newer ones use(newer cable older hole no worky).

I did reuse all of my brake hardware and drums after I swapped the newer backnig plates on.
 
Any negatives, as far as mechanically, for running an electric line lock in the rear for the time being? It wouldn't be for long term parking.

Seems way back when I started reading here, I recall reading that a line lock can be hard on the master cylinder when the pressure is released. Is that the case? I'm thinking holding the brakes when releasing the lock would alleviate that issue..

Does anyone make a line lock that'll mount up to the factory hardware? Should it be in the back of the rig or at the front near the MC?
 
jonathon said:
Any negatives, as far as mechanically, for running an electric line lock in the rear for the time being? It wouldn't be for long term parking.

Seems way back when I started reading here, I recall reading that a line lock can be hard on the master cylinder when the pressure is released. Is that the case? I'm thinking holding the brakes when releasing the lock would alleviate that issue..

Does anyone make a line lock that'll mount up to the factory hardware? Should it be in the back of the rig or at the front near the MC?
Click to expand...

No real negatives, I use my line lock as a parking brake all the time.

You'll need to buy a tube flaring kit like this (I think that's the one I have). I believe mine is mounted to the engine crossmember right by the proportioning valve thing.
 
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