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Brake upgrades using factory parts for GMT-400(88-00 OBS), and 94-99 DODGE 2500/3500

THEFERMANATOR

FRANKENBURBAN
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Fermanator! Thank you for the kindness of a reply! To summarize:
1. My 8 lug C2500 2WD semi floating Axel WILL NOT ACCEPT the 3.5” drums and shoes.
2. I can upgrade the FRONT BRAKES using ALL the GMT800 parts without difficulty, and improve the braking for a reasonable cost.
Did I get it right??

Grateful to you!!
Bob
1. As far as I know, no. Trucks with the 13x3.5" brake shoes were all 14 bolt full floaters with the drums that slide over the hub. The 13x2.5" shoes were on semi-float axles and 14 bolts with the drums behind the hub. The 3.5" wide drums are pretty massive.

2. It's doable as several have done it, but it requires reamers, and quite a few parts be swapped out.
 

Big T

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1. As far as I know, no. Trucks with the 13x3.5" brake shoes were all 14 bolt full floaters with the drums that slide over the hub. The 13x2.5" shoes were on semi-float axles and 14 bolts with the drums behind the hub. The 3.5" wide drums are pretty massive.

2. It's doable as several have done it, but it requires reamers, and quite a few parts be swapped out.
Definitely doable, but if you go all new quality parts, it will run you $1,200.
 

Pistachiobob

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Dear Fermanator: You have been exceedingly gracious with your time and expertise! Many Thanks!
I have to review the details of your original post back in, I believe, 2016, where you provided photos of the parts needed to upgrade the front braking system of C and K 2500 GM vehicles. Based on the responses of BIG T and your last reply, I apparently am confused on what the GMT800 vehicle is; I thought it was the 3500 series, which I recall as having front rotor and caliper parts that would interchange with the C2500 parts without modifying any of the front suspension. I am GREATLY appreciative of EVERYONE’s replies to assist me in driving a safer 1999 C2500 Suburban!!
Best, Bob
 

THEFERMANATOR

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Dear Fermanator: You have been exceedingly gracious with your time and expertise! Many Thanks!
I have to review the details of your original post back in, I believe, 2016, where you provided photos of the parts needed to upgrade the front braking system of C and K 2500 GM vehicles. Based on the responses of BIG T and your last reply, I apparently am confused on what the GMT800 vehicle is; I thought it was the 3500 series, which I recall as having front rotor and caliper parts that would interchange with the C2500 parts without modifying any of the front suspension. I am GREATLY appreciative of EVERYONE’s replies to assist me in driving a safer 1999 C2500 Suburban!!
Best, Bob
Most refer to the gmt800 as the nbs. They started in 99 with the newer body style truck's, and then in 01 the 2500hd and 3500 trucks. They have dual piston caliper brakes front and rear compared to the gmt400(excluding the c3500hd) with single piton in front and drums in rear.
 

Pistachiobob

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To all members on this thread: I am overwhelmed with your knowledge and graciousness to share it with C2500 neophytes like me! I’m especially grateful to Fermanator and Will L! Will, you solved my very basic but confusing problem of explaining the difference between a GMT400 and GMT800! Until your response, I couldn’t understand why Fermanator stated the C3500 DWR FRONT BRAKES were a straight swap onto my 1999 C2500 Suburban! I thought GMT800 was synonymous with C3500! Now I understand why Snarl95 said a knuckle swap was required to use GMT800 front brake parts. I’m staying with Fermanator’s original recommendation of the straight swap using C3500 DRW FRONT brake parts. BTW (By the Way), simply removing the spring and plunger seal from the updated proportioning valve has made a BIG improvement in the braking of my otherwise unmodified system. Just FYI! I hope you laugh, rather than shake your head, when I confess it also took me awhile to figure out nbs and obs! I now realize the old and new body styles are described by GMT400 and 800! If you asked me about the photosynthetic efficiency of a pistachio tree, I could tell you all about it!!! LOL!! Thanks!! Bob
 

Will L.

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We are all here to help and enjoy new friends. Wise choice in heeding Ferm- dude is an automotive rock star. And I love pistachios too btw. No idea how any of it works other than the trick of using a shell of one to open the others that are hard to open- that made a difference in my pistachio life. Haha
 

Pistachiobob

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Will!! LOL on the closed shell pistachios! This is a very fascinating nut, and is mentioned by name in Genesis! It’s the only Drupe (a botanical family of fruit) that grows the pericarp (shell covered in a green hull) in the spring (April to early June) and THEN FILLS the shell with the developing embryo (nut meat) from July to harvest in September! The nut meat actually outgrows the size of the shell, and forces it to split! The “non-splits” are thought to be late set nuts that do not have sufficient time or competitive ability to split! Think how cool it is that our brains quickly figure out how to use the shell half as a “tool”! I’d better stop! This is Truck Stop, not NUT STOP!!! 😆
 

Big T

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Will!! LOL on the closed shell pistachios! This is a very fascinating nut, and is mentioned by name in Genesis! It’s the only Drupe (a botanical family of fruit) that grows the pericarp (shell covered in a green hull) in the spring (April to early June) and THEN FILLS the shell with the developing embryo (nut meat) from July to harvest in September! The nut meat actually outgrows the size of the shell, and forces it to split! The “non-splits” are thought to be late set nuts that do not have sufficient time or competitive ability to split! Think how cool it is that our brains quickly figure out how to use the shell half as a “tool”! I’d better stop! This is Truck Stop, not NUT STOP!!! 😆
"Non-splits are thought to be late set nuts." Does that make is easier and safer to just hop on a bike?
 

Will L.

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Big T: our highest educated, most money earning guy who still sees everything as a 13 year old jokester. Haha
Reminds me of A guy at work who says “If it was funny at 7, it’s funny at 97!”
 

Big T

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Big T: our highest educated, most money earning guy who still sees everything as a 13 year old jokester. Haha
Reminds me of A guy at work who says “If it was funny at 7, it’s funny at 97!”
If you’re laughing in life, you are not having fun.

Now can we talk about guns? I just ordered a Benelli Super Black Eagle III. Sportsman’s Warehouse had a loyalty rewards program of $600 off ($1,099) which is a damn good price for that gun. One per customer at that price. My first ever gun purchase. Haven’t told my wife yet.
 

Will L.

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I taught my wife how to shoot when we were dating. Don’t start her out on anything big or loud. Build confidence with simple shots. Next thing ya know she will be buying you a gun every 5 years and ammo at every birthday. Your wife is kinda small frame- I would start her on a .22 to .38 If she has fun at it, ya both will.

Oh, There is a problem however. I don’t back talk her now- she hits what she aims at...
 

Big T

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I taught my wife how to shoot when we were dating. Don’t start her out on anything big or loud. Build confidence with simple shots. Next thing ya know she will be buying you a gun every 5 years and ammo at every birthday. Your wife is kinda small frame- I would start her on a .22 to .38 If she has fun at it, ya both will.

Oh, There is a problem however. I don’t back talk her now- she hits what she aims at...
She grew up shooting guns. We’ve got her Winchester 101 over/under 20 gauge, which is a beautiful gun. She’s shot Paveltolz’s Glock 21, though she was breathing like a beached carp before pulling the trigger. Last but not least, she’s a lawyer.
 

Husker6.5

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I taught my ex-wife the basics of boxing: How to properly throw punches, the types of punches and a couple of basic punch combinations (like a double left jab followed by an overhand right) back when we were first married since I had boxed Golden Gloves a couple of years in college and was a sparing partner for a couple of local pros then, too and she was working a job where she often got off of work later at night (waitressing) to an empty, near dark parking lot.
 

Big T

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I taught my ex-wife the basics of boxing: How to properly throw punches, the types of punches and a couple of basic punch combinations (like a double left jab followed by an overhand right) back when we were first married since I had boxed Golden Gloves a couple of years in college and was a sparing partner for a couple of local pros then, too and she was working a job where she often got off of work later at night (waitressing) to an empty, near dark parking lot.
Hope you didn’t bruise her up and have the social workers show up.
 

Husker6.5

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Nah, stood next to her and showed her how to stand, pronate when you throw the punch, how to rotate through with hips and shoulders for power and speed throwing and recoiling. Shadow boxed a little and had her hit my open hands while she wore my bag gloves.

She did wind up successfully using the skills I taught her one night after work a couple of months later, but that's another story for another time and place.
 
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