Gmt400 to gmt800 brake upgrade. I have a question about rear disc brake conversion kits.

Gmt400 to gmt800 brake upgrade I already have hydroboost and it's nothing to write home about. Or do like this person and swap the whole brake setup off a gmt800 but its a but more work NBS Front Brake Swap for OBS Trucks There are two brake packages for the 2500 (3/4 ton), one uses 2. This mush is much longer with the GMT800 master, because of the smaller piston moving less fluid. jpg. I got the steering knuckles off of it . The tierod stud hole was the same on both, just had to turn the tierod 180-degrees. While an improvement, is it a substantial improvement. I had read a bit about folks upgrading to a GMT800 brake setup but haven't been able to find anything definitive in my google research. I could simply swap out with another gmt400 master but was curious is I could keep the gmt400 hydrobooster and upgrade the master from a gmt800. All of this could have been avoided by using the gmt400 rod end instead. Joined Aug 7, 2019 Messages 3,410 Reaction score 4,395 Not sure on that one. Aug 17, 2021 Joined Apr 11, 2013 Messages 506 Reaction score 213 Location Western WA from Eastern WA, aka the wet side from I have a 1991 c1500 Sierra that I have been wanting to upgrade the front brakes too gmt 800 style while also knocking out 2 birds with one stone I want to also go 6 lug . 5" rear shoes but the same drum. The rear brake upgrade made MORE difference than the front. 15 calipers from the 8 lug (8600lbs) calipers. I started doing some research on the GMT800 MC upgrade. I may decide to GMT400 Brake Upgrade. I just watched this guy swap GMT 800 front brakes into his K2500 suburban. 4l. It fits tight. 15" drw is 3. Location Hudson, NH. I can see the want for Brake Upgrade. I honestly didn't realize it was that difficult. So from everything I’ve gathered it’s should be a straight forward swap. Bled the ABS unit and bled the system from the furthest to closest point. bought with upgraded brakes, 4 wheel disc , from a gmt800. I like the EBC yellow stuff brake pads for up front and semi metallic shoes out back. There is NO reason to add the GMT800 master cylinder to your vehicle unless you also add The front brake upgrade was noticeable. All i had to get was a spacer to build out the brakes for proper alignment. The hubs were different but the OBS axles fit the NBS hubs perfectly. Aug 17, 2020 #5 I am definitely interested in upgrading both Front & Rear. The larger piston on QTU-equipped masters sends this fluid in a much shorter pedal stroke, so the GMT400 brake pedal initial "mush" is the QTU feature in action, sending fluid to the low-drag calipers. Any insight? Sep 28, 2011 #10 borahshadow I'm Awesome. I also thoroughly bled the system with my Motive power bleeder and I am quite certain I got all the air out. It is definitely superior in stopping power. I had an Allstar Performance 9. Looks like a big improvement over the stock setup. (Highly recommend this) The diameter and square shape of the gmt800 rod end required modification of the brake light switch and a spacer to be added on the pin to reduce slack. The usual trick that everyone There are many GMT400 upgrades centered around the brakes. Maybe being a 2500 vs. I'm not quite sure what happened there. Most of what I found is half ton upgrades from vacuum boost Has anyone upgraded to the 3. Anyway, I was thinking about upgrading the calipers as well. He's talking about putting gmt900 brakes on a gmt800 truck, it's a popular budget brake upgrade, However it had seized in that position. The Dana 70 comes with massive rear disc brakes, but I The Powerstop upgrade is I think a good upgrade. What were the issues addressed? My old K1500 had a gmt800 Tahoe MC, gmt800 single piston rear disks and 8 lug front calipers and that was by far the best K1500 brakes I’ve ever driven So in my research on the NBS front brake upgrade for our trucks, the 99-00 non-HD NBS steering knuckle/spindle will accept the GMT400 tie rod end without modification, same as the threads on this brake swap. I do tow multiple times a month, run larger tires and on one of my longer trips where I was towing, had some issues with overheating. I bought that MC but had to use a proportional valve from an older 3rd gen truck with disc/drum. 1 brake fluid. I’m afraid that when people report better braking, it is because of removing worn hardware for new. I’ve read up on the GMT900 brake upgrade. Towards the end he mentions a hydroboost master For those with 6 lug wheels, you DO have an easy to swap in factory brake upgrade in the 8 lug single rear wheeled pads and calipers. There were some GMT800 2500s, they were sort of oddball trucks from what I've researched. I was reading about brake upgrades online. All I have to do The taper didn't fit the GMT800 knuckle as is. I also switched to DOT 5. The most popular GMT400 brake upgrades include: GMT400 rear disc brake conversion; GMT800 brakes I used all OEM Escalade AWD rear set up with 2004 silverado x cab rear brake cables. Anyhow, I did the GMT800 front knuckle/ brake "upgrade" along with the GMT800 master cylinder. GM offerred these from the factory on TAHOES sold for police and fire department As far as brake upgrades, you can use the drw 1 3/16" wheel cylinders in the rear along with the acdelco rear brake shoes. Mar 15, 2019 #17 I have an 06 and want to do the 07+ front brake upgrade. Oddly, on RockAuto, I find disparities in the specs. And since I have the non-HD spindles I’ll get to reuse my current tie-rods. 218. The price difference between the GMT800 and GMT400 boosters has narrowed so it's not as much a cost question as a benefit question at I've not read others going through that to get the improved brake feel that's generally the desire to achieve with the swap. This will also convert the front end with a separate hub and disc. 56 degree/2" taper reamer to enlarge the GMT800 knuckle's upper ball joint taper to fit GMT400 balljoint. . Today I’m picking up a complete setup from a 2000 K2500 non-HD. Reactions: jrsavoie, MrMarty51, FellowTraveler and 1 other person. In hindsight I should have used the stock vac rod end instead. Is this a direct bolt on caliper. I have a question about rear disc brake conversion kits. That "dead spot" that I know these trucks are famous for is gone. I came across this post a while back , got inspired to doing this mod. Is there any merit to anything I just wrote? the srw 1 ton piston is 3. Thread starter Gibson; Start date Oct 9, 2024; What is the difference between GMT800 upper control arms and GMT400? It seems that if the lower control arms are compatible, there should be an equivalent for the upper ones as well. That’s comparing a GMT800 K2500 to a GMT400 K3500 DRW. Thread starter stutaeng; Start date Oct 28, 2021; Towards the end he mentions a hydroboost master cylinder upgrade from the big, heavy 10 lug 3500HD GVWR 15,000 trucks. 5" wide rear shoes and the other uses 3. The ABS wires plugged right in,too. I will also What you can do is swap your master cylinder to a GMT800 one fairly simply. The most popular GMT400 brake upgrades include: GMT400 rear disc brake Brake upgrades using factory parts for GMT-400(88-00 OBS), and 94-99 DODGE 2500/3500. 5" rotor/4 piston caliper have been adapted to GMT900's and GMT800's already with The GMPP brakes that utilize a 16" Brembo rotor GMT 800 front brake upgrade to GMT400 8 lug. I’m definitely doing those. -NBS 1500 series master cylinder (buy the corresponding master cylinder for your truck, 1/2 ton=1/2ton, 3/4ton= 3/4ton)-AGS BLF 26C brake line adapter (I got mine at autozone)-DOT 3 brake fluid Yes the Hydroboost compared to vacuum is day and night difference. Do you use the original style pads or the ones that go with the bigger calipers. I got new shoes and drums and adjusted everything properly out back. The popular affordable options seem to be steel lines and a gmt800 master cylinder swap. a 1500 it's less discussed. Upgraded the fronts with the same. Last edited: Nov 22, 2024. Up front you can swap calipers, rotors, and pads to Has anyone tried the brake upgrade using the 2019 and up rotors and four piston calipers? Found this video on it. Thanks . Between quick take-up systems, drum versus disc proportioning valves, and the liability of grinding on brake components to get them to fit, there's way too many opportunities on our trucks to end up with a brake system that feels Electric brakes. Many people swap the master cylinder from a GMT800, From what I remember the brake booster is the same for all GMT400 1500/2500/3500. I'm looking at 1998 Chevy K3500 I just bought my first truck, 1998 GMC c1500. I managed to find a 2005 Chevy astro van 2 wheel drive model . Reactions: HotWheelsBurban. That’s when I found out it is an obsolete part now. Thread starter spasm3; Start date Feb 2 this summer will installing 2000 suburban package on my 89 GMT400 4x4. The only difference being the size of the piston. gmt800 to gmt900 brake swap. Here is the predicament I’m in: The brake pedal is firmer but the truck doesn’t want to stop. Will the original brake hoses work. Reactions: 1990Z71Swede, Road Trip, movietvet and 2 GMT400 brake systems willy-nilly with next-gen brake The above (plus GMT800 master cylinder) will get you Astro/GMT800 brakes on a 2WD. I cover the most common GMT400 brake upgrades. 1 KB · Views : 6 The T1XX factory option "big" brakes w/13. The GMT800 brake upgrade is NOT an easy swap on a 2 wheel drive, The single biggest reason you cannot do the gmt800 swap to a 2 wheel drive gmt400 is due to how the lower ball joints connect to the spindle. I've only read that Cadillac calipers with a modified bracket would work but then your parking brake has to be modified. I went to the NAPA parts store for fresh calipers and rotors and made another huge discovery. I purchased the "PowerStop Z36 Truck & Tow" Front/Rear kit and installed them on my 04' Suburban Z71 4x4 5. Thank you for pointing that out, I was not aware. Even the NBS brake hoses fit the OBS brake lines perfect. There are many GMT400 upgrades centered around the brakes. Along with a set of fresh tires just recently, and she stops real good now. Brake pedal is really soft after changing fluid and replacing front pads and rebuilding the rear drums. What kit did y’all use, where did you get it and,was Mainly the GMT800 MC firming up the pedal was the difference All i had to get was a spacer to build out the brakes for proper alignment. The OBS trucks are known for a horrible squishy brake pedal. 2019 big brake. Try to find/get a GMT400 HB unit if you want all 4 bolts otherwise do what I did and punch one of them out or drill a new hole for the GMT800 unit. How is this different from the Little Shop front caliper upgrade kit. Reactions: stutaeng. one of the commentors mentioned that the 1500s have spongy brakes even when they work right and said one solution was upgrading the I can't seem to find a thread with relatable information. I think I’m going to go the route by using the GMT800 lower arm. So in addition to reaming upper balljoint hole, I reamed the GMT800's tie rod hole to fit the ES409R tie rod. Jun 25, 2020 #7 stutaeng I'm Awesome. I’m also going to bleed the abs through a friends scan tool. Anybody know of kits that give it a little more stopping power that aren't crazy expensive? I wouldn't recommend just swapping a GMT800 booster in place, unless you swap the entire brake system, including a GMT800 hydroboost. 1999 k2500 crew cab 7. I had to buy parts anyways so I went with a set of 2010+ GMT900 Calipers, pads, rotors and brake hoses to upgrade to the 13" rotors instead of 12". The GMT800/900 stuff can be bolted on for junkyard twin piston calipers and larger rotors. You will need a HB power steering pump with extra ports to plumb in. Now, the brake pedal is without question firmer. The GMT800 brake upgrade is NOT an easy swap on a 2 wheel drive, it's not even really possible to swap 800 spindles onto a 2 wheel drive 400 without extensive modifications I have come up with at 4 wheel Anti-lock braking system conversion for GMT-400 and earlier models. Upgraded I’ve got a k1500 with very squishy brakes. 3L. Were I to repeat the brake upgrade process on another GMT400, I'd just start with the HB and likely be done at that point. A GMT400 end will not bolt into a GMT800 knuckle. The above (plus GMT800 master cylinder) will get you Astro/GMT800 brakes on a 2WD. 285" i don't think much gain if any came from the drw pads over srw but they are a bit thicker and designed different. GMT-400 to GMT-800 brake conversion tie rod discussion | The Truck Stop . Recently discovered my master cylinder in leaking in the front. I would say save your i'm new to the K3500 platform and trying to research brake upgrades, but I'm not finding much out there. Joined How to swap out the squishy brake pedal for a firm brake pedal. Found a pretty significant leak on the hydroboost unit in my '99 3/4 ton Suburban yesterday. This spring, I installed a Dana 70S rear axle from a Chevy Express van into my GMT400 K2500 Suburban. I couldn’t find posts about the disk brake conversions.