Rear brake upgrade: 11” to 13”

['63GENIII]

LMAO. Ass transplant! I gotta register there. Nice 14B. I gotta ask, where in the hell does the Oreo come into play? Does it help calibrate the dial indicator

I didn't read it all of the way through. Do you like the ARB? Ive got a Gov Loc. It hasn't given me any problems but if it were to go, I was looking at either ARB or an OX Locker type setup. I have a "thing" about things locking up when Im not expecting it.

[DirtyLarry]

Originally Posted by '63GENIII

LMAO. Ass transplant! I gotta register there. Nice 14B. I gotta ask, where in the hell does the Oreo come into play? Does it help calibrate the dial indicator

I didn't read it all of the way through. Do you like the ARB? Ive got a Gov Loc. It hasn't given me any problems but if it were to go, I was looking at either ARB or an OX Locker type setup. I have a "thing" about things locking up when Im not expecting it.

like I mentioned in that thread….my pal Bill needs to be motivated with food. Got to keep treats in front of him like a dog to keep him focused

The verdict is still out on the ARB as the project is far from complete. I just got the axle under it yesterday afternoon and still need to set up the pinion angle and shock arrangement. I haven’t even gotten a compressor or air tank or even started laying out the front Bilstein 7100 shock layout yet. Got a long ways to go but I have until June when Desert Trip 2017 is booked.



The G-Van axle looks wider...My eye micrometer says about 1.5” on each side
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['63GENIII]

Funny how you say that its wider. Does it even out with the front?

I had no clue that my old 60 was nearly 3 inches narrower than the front until I got the 14B home and found it was actually 5 inches wider than the 60. After the initial freak out subsided, I realized that it actually lined up the front / rear track a little better. 3/4" wider in the rear on each side.

I keep thinking that maybe if I keep some Oreos around, that the kids may help out a little more.... realistically though, Id end up needing an assplant

Cant wait to hear how the ARB works for you. If anyone would use it like its supposed to be used, it would be you.

Keep up the good work! Looks great!

[sweetk30]

true van width rear 14ff is 70" wms to wms . reg srw pickup rears are 67" and c&c is 64" . a dana 60 srw front is 69" .

[SunSoaked]

I'm going the other way, from 13 to 11 inch drums. I'd rather lose the weight than carry around a capability I'll never use. I'm swapping in a 14FF/dana 60 combo from a cucv into my 85 3/4 ton.

My only question is regarding the wheel cylinders. Are they different diameter/capacity and if so, does it affect the stock master cylinder?

Thanks for sharing the info Larry.

Mike

[1950Bowtie]

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[Orange Crate]

Originally Posted by SunSoaked

I'm going the other way, from 13 to 11 inch drums. I'd rather lose the weight than carry around a capability I'll never use. I'm swapping in a 14FF/dana 60 combo from a cucv into my 85 3/4 ton.

My only question is regarding the wheel cylinders. Are they different diameter/capacity and if so, does it affect the stock master cylinder?

Thanks for sharing the info Larry.

Mike

I went with discs on my 14bff so FREE to a good home 13"drums and backing plates. Of course you have to pick them up.

[Toomanysubs]

Can anyone help???
I have a 1987 Chevy suburban 2500. It is a 350 gib with th400 trans. 4X4 it started life with a 9.5” semi floating rear. The carrier had a lot of slop and I had a 10.5” full floating rear out of another truck. Ever since I installed it the stopping power has been horrible. All of the rear brakes are new except drums which were cut and well within tolerance. I didn’t change the booster or master or proportioning valve. Also my truck still has the rear weight/level sensor and the brake lines do go through it. But they always did. My other two suburbans are a 1982 3/4 two 2wd. And I can lock it’s brakes up if I push the pedal too quickly. It is a 9.5”. Am I just expecting too much from the 10.5” brakes? Thank you in advance for any help or suggestions I really appreciate it. This is my plow truck and I’m trying to get it figured out before the snow flies. Again thank you!

[sweetk30]

first thing those load valves love to go bad and freeze up . by pass it .

then looking up the 87 burb master cylinder part #'s .

11" rear brakes was aluminum / plastic tank master with small bore size .

13" rear brakes was cast iron master with bigger bore for more fluid flow .

so if bypassing and bleading the rear dosnt help the next step is bigger master to match the bigger rear brakes .

but also double check the brakes are adjusted in the rear . self adjusters dont do crap most of the time . jack up the rear so tires are off the ground and click them up till just starting to scuff the drum face .

[GonicGM]

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[Kalums]

Post revive... Activate!! Ok I've got a full float DRW Dana 70 I a 71 GMC I'm currently rebuilding the 13" rear drums on from the ground up and I'd appreciate any help given. It appears to have GM hardware (alot seems to be missing, and to be honest the rear brakes never worked since I got it) Here is what I've got so far: 1)they never worked, except for the parking brake, 2) The wheel cylinders were corroded to high heaven and siezed solid... The part in the axle had an International Harvester part number on it and has a 1.25 Bore size, 3)shoes were cracked and about 2mms away from the rivits, I have no idea what the correct brake shoes are supposed to be. Every parts store including GM says it "should be either the 451s or 320s... But I personally I can't tell a difference in person and the PO loused up whatever shoes they bought to accommodate the parking brake by drilling an extra hole. 4) there was no self adjuster hardware on the passenger side... At all... None. The pictures I was able to find on here and the internet lead me to buy the adjuster kits (both sides). Now as I'm putting the Passenger side back together... Things aren't lining up IF I use the parking brake spreader bar...should I groove out one of the notches(it is only about a 1/4 inch off And I've given the parking brake as much slack in the line as I can)? Or should I buy a new spreader bar? This one seems really wide/long... Not sure of the correct terminology. I'm sure I'm forgetting something but Any help would be greatly appreciated.