Mike "Wuzzy121". Rest in peace, brother

Go Back   Tacoma World Forums > Tacoma Discussion > 2nd Gen. Tacomas

Notices

Drum to Disc Brake Conversion?

Reply
 
Thread Tools Search this Thread
Old 01-03-2010, 09:03 AM   #2
Senior Member
jcayce has much to be proud ofjcayce has much to be proud ofjcayce has much to be proud ofjcayce has much to be proud ofjcayce has much to be proud ofjcayce has much to be proud ofjcayce has much to be proud ofjcayce has much to be proud ofjcayce has much to be proud of
Joined: Jun 2009, #18475
Location: Texas
Gender: Male
Posts: 433
jcayce's Tacoma Gallery
http://www.tundraracing.com/rbck.htm

Not yet, but it is on the list. The kit is cheap enough and I am mechanically inclined...it does not seem too daunting. I question whether or not I want to mess with brakes that are spot on. Maybe someone that has done it can chime in about if the brake performance increased significantly or not.

Side note: I have been following the 'rear disc' trend for a little while and am concerned that it really is just a trend. For example, when Chevrolet did a redesign of the 1500 they switched to disc brakes on the rear but recently went back to drums on the rear? Some say drums are cheaper but wouldn't it be cheaper to use the same parts at all 4 corners instead of having seperate parts just for the rear? I am a little biased though as my 2005 Froniter Nismo 4x4 had rear discs and I loved/miss that truck.
  Reply With Quote
Old 01-03-2010, 09:06 AM   #3
What's the matter, Colonel Sandurz? CHICKEN?
moto932 is one of the sharper tools in the shedmoto932 is one of the sharper tools in the shedmoto932 is one of the sharper tools in the shedmoto932 is one of the sharper tools in the shedmoto932 is one of the sharper tools in the shedmoto932 is one of the sharper tools in the shedmoto932 is one of the sharper tools in the shedmoto932 is one of the sharper tools in the shedmoto932 is one of the sharper tools in the shedmoto932 is one of the sharper tools in the shedmoto932 is one of the sharper tools in the shed
 
moto932's Avatar
Name: Eric
Joined: Apr 2009, #15770
Location: Dayton, Ohio
Age: 30
Gender: Guy
Posts: 2,992
moto932's Tacoma Gallery
i've heard to stay away from this conversion. use the search button.
  Reply With Quote
Old 01-03-2010, 09:10 AM   #4
Ban Pending
HBMurphy is one of the sharper tools in the shedHBMurphy is one of the sharper tools in the shedHBMurphy is one of the sharper tools in the shedHBMurphy is one of the sharper tools in the shedHBMurphy is one of the sharper tools in the shedHBMurphy is one of the sharper tools in the shedHBMurphy is one of the sharper tools in the shedHBMurphy is one of the sharper tools in the shedHBMurphy is one of the sharper tools in the shedHBMurphy is one of the sharper tools in the shedHBMurphy is one of the sharper tools in the shed
 
HBMurphy's Avatar
Name: Paul
Joined: Jun 2009, #18993
Location: So California Coast
Gender: Male
Posts: 5,729
HBMurphy's Tacoma Gallery
Quote:
Originally Posted by badguybuster View Post
I saw this posted on another forum and thought I'd get opinions from ya'll. Has anyone converted their rear drums to disc brakes? Pros? Cons?
I like good brakes and I think the brakes on our trucks are pretty weak but that is a sign from god to drive our trucks slower than we drive, lower CG cars. I let it remind me to drive, well, like the 62 year-old that I am!
  Reply With Quote
Old 01-03-2010, 09:12 AM   #5
Ban Pending
HBMurphy is one of the sharper tools in the shedHBMurphy is one of the sharper tools in the shedHBMurphy is one of the sharper tools in the shedHBMurphy is one of the sharper tools in the shedHBMurphy is one of the sharper tools in the shedHBMurphy is one of the sharper tools in the shedHBMurphy is one of the sharper tools in the shedHBMurphy is one of the sharper tools in the shedHBMurphy is one of the sharper tools in the shedHBMurphy is one of the sharper tools in the shedHBMurphy is one of the sharper tools in the shed
 
HBMurphy's Avatar
Name: Paul
Joined: Jun 2009, #18993
Location: So California Coast
Gender: Male
Posts: 5,729
HBMurphy's Tacoma Gallery
Quote:
Originally Posted by jcayce View Post
http://www.tundraracing.com/rbck.htm

Not yet, but it is on the list. The kit is cheap enough and I am mechanically inclined...it does not seem too daunting. I question whether or not I want to mess with brakes that are spot on. Maybe someone that has done it can chime in about if the brake performance increased significantly or not.

Side note: I have been following the 'rear disc' trend for a little while and am concerned that it really is just a trend. For example, when Chevrolet did a redesign of the 1500 they switched to disc brakes on the rear but recently went back to drums on the rear? Some say drums are cheaper but wouldn't it be cheaper to use the same parts at all 4 corners instead of having seperate parts just for the rear? I am a little biased though as my 2005 Froniter Nismo 4x4 had rear discs and I loved/miss that truck.
Having worked for GM (Desert Proving Grounds) I'd say if GM did it, it was to make it cheaper. Now when you see race bikes, cars and trucks using drums up front - now that would indicate drums are the best... they are not. Cross a river with drums, cross a river with discs - which condition would you rather have?
  Reply With Quote
Old 01-03-2010, 09:24 AM   #6
Senior Member
jcayce has much to be proud ofjcayce has much to be proud ofjcayce has much to be proud ofjcayce has much to be proud ofjcayce has much to be proud ofjcayce has much to be proud ofjcayce has much to be proud ofjcayce has much to be proud ofjcayce has much to be proud of
Joined: Jun 2009, #18475
Location: Texas
Gender: Male
Posts: 433
jcayce's Tacoma Gallery
Quote:
Originally Posted by HBMurphy View Post
Having worked for GM (Desert Proving Grounds) I'd say if GM did it, it was to make it cheaper. Now when you see race bikes, cars and trucks using drums up front - now that would indicate drums are the best... they are not. Cross a river with drums, cross a river with discs - which condition would you rather have?
I raced mountain bikes professionally for several years and lived through the conversion from rim brakes to disc brakes. Mud and water are HELL on brake pads for either system and one ride with river crossings and mud almost always meant new pads. The rims brakes would almost always pack up but the discs would always work no matter how loud the squeeling and chattering got.

That being said, I recently built up two bikes, a vintage Klein Mantra Carbon Race with Hope 4 piston discs and a UK only 2008 Trek 8900 with M952 XTR rim brakes. I have CONSTANTLY been adjusting the disc brakes but the rim brakes are spot-on and I can literally bring the bike from a full haul to a complete stop with one finger.

I know, bikes and trucks, apples and oranges...
  Reply With Quote
Old 01-03-2010, 09:30 AM   #7
abides.
Brunes is one of the sharper tools in the shedBrunes is one of the sharper tools in the shedBrunes is one of the sharper tools in the shedBrunes is one of the sharper tools in the shedBrunes is one of the sharper tools in the shedBrunes is one of the sharper tools in the shedBrunes is one of the sharper tools in the shedBrunes is one of the sharper tools in the shedBrunes is one of the sharper tools in the shedBrunes is one of the sharper tools in the shedBrunes is one of the sharper tools in the shed
 
Brunes's Avatar
Coast Guard: LT- CG MH-65C/D Driver- CGAS NOLA
Name: Mark
Joined: May 2008, #7011
Location: Big Easy, USA
Age: 30
Gender: Dude
Posts: 17,718
Brunes's Tacoma Gallery
Send a message via AIM to Brunes
Folks who have tried the conversion (MJP2 is one I think) were not pleased with the performance. They are different systems and the truck was built to utilize the drums in the rear.

Both have up and downsides- Save your coin and upgrade your lines, fluid, and pads...Rotors if you want...but converting the rear end seems like thorwing money after something that isn't a problem...imho.
  Reply With Quote
Old 01-03-2010, 09:35 AM   #8
Ban Pending
HBMurphy is one of the sharper tools in the shedHBMurphy is one of the sharper tools in the shedHBMurphy is one of the sharper tools in the shedHBMurphy is one of the sharper tools in the shedHBMurphy is one of the sharper tools in the shedHBMurphy is one of the sharper tools in the shedHBMurphy is one of the sharper tools in the shedHBMurphy is one of the sharper tools in the shedHBMurphy is one of the sharper tools in the shedHBMurphy is one of the sharper tools in the shedHBMurphy is one of the sharper tools in the shed
 
HBMurphy's Avatar
Name: Paul
Joined: Jun 2009, #18993
Location: So California Coast
Gender: Male
Posts: 5,729
HBMurphy's Tacoma Gallery
Quote:
Originally Posted by jcayce View Post
I raced mountain bikes professionally for several years and lived through the conversion from rim brakes to disc brakes. Mud and water are HELL on brake pads for either system and one ride with river crossings and mud almost always meant new pads. The rims brakes would almost always pack up but the discs would always work no matter how loud the squeeling and chattering got.

That being said, I recently built up two bikes, a vintage Klein Mantra Carbon Race with Hope 4 piston discs and a UK only 2008 Trek 8900 with M952 XTR rim brakes. I have CONSTANTLY been adjusting the disc brakes but the rim brakes are spot-on and I can literally bring the bike from a full haul to a complete stop with one finger.

I know, bikes and trucks, apples and oranges...
I hear you on the paper thin mtn bike dealios - I have 3 mtn bikes and love my Magua brakes and my rim brakes - but overall, I still like the perf of my discs. I can understand.

RE our trucks - I think I will mod something else or put it towards an 80's toyota truck.

Edit: I do like the look! But then again, I would have to wash my truck, polish out the trail stripes, pull then dents, etc - to allow someone to focus on the discs.
  Reply With Quote
Old 01-03-2010, 09:46 AM   #9
Senior Member
sonjay is just really nicesonjay is just really nicesonjay is just really nicesonjay is just really nice
 
sonjay's Avatar
Joined: Oct 2008, #9834
Location: Vancouver Island
Gender: Male
Posts: 701
sonjay's Tacoma Gallery
Front Range off-road, makes a full floater conversion that also converts to rear disks, that would be the way I would go, not only getting better performance with the disks, also gaining a lot of strength with the full floater axle!
  Reply With Quote
Old 01-03-2010, 09:47 AM   #10
With sufficient thrust, pigs fly just fine.
chris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shed
 
chris4x4's Avatar
Name: FlimFlubberJAM
Joined: May 2008, #6497
Location: Tenoe, AZ
Gender: Male
Posts: 96,867
chris4x4's Tacoma Gallery
Quote:
Originally Posted by Brunes View Post
Folks who have tried the conversion (MJP2 is one I think) were not pleased with the performance. They are different systems and the truck was built to utilize the drums in the rear.

Both have up and downsides- Save your coin and upgrade your lines, fluid, and pads...Rotors if you want...but converting the rear end seems like thorwing money after something that isn't a problem...imho.
X2.
  Reply With Quote
Old 01-03-2010, 09:48 AM   #11
Senior Member
jcayce has much to be proud ofjcayce has much to be proud ofjcayce has much to be proud ofjcayce has much to be proud ofjcayce has much to be proud ofjcayce has much to be proud ofjcayce has much to be proud ofjcayce has much to be proud ofjcayce has much to be proud of
Joined: Jun 2009, #18475
Location: Texas
Gender: Male
Posts: 433
jcayce's Tacoma Gallery
Quote:
Originally Posted by HBMurphy View Post
I hear you on the paper thin mtn bike dealios - I have 3 mtn bikes and love my Magua brakes and my rim brakes - but overall, I still like the perf of my discs. I can understand.
Best of both worlds:

http://www.chainreactioncycles.com/M...?ModelID=30752

Magura hydraulic rim brakes were an industry standard.
  Reply With Quote
Old 01-03-2010, 09:50 AM   #12
Senior Member
jcayce has much to be proud ofjcayce has much to be proud ofjcayce has much to be proud ofjcayce has much to be proud ofjcayce has much to be proud ofjcayce has much to be proud ofjcayce has much to be proud ofjcayce has much to be proud ofjcayce has much to be proud of
Joined: Jun 2009, #18475
Location: Texas
Gender: Male
Posts: 433
jcayce's Tacoma Gallery
Someone here in San Antonio has rear discs on their X-Runner and it LOOKS nice, I wonder how they perform though. I see him driving around the O'Conner/35N area every once in a while (Black X-Runner). Maybe he's on this forum and will give his input.
  Reply With Quote
Old 01-03-2010, 09:52 AM   #13
Ban Pending
HBMurphy is one of the sharper tools in the shedHBMurphy is one of the sharper tools in the shedHBMurphy is one of the sharper tools in the shedHBMurphy is one of the sharper tools in the shedHBMurphy is one of the sharper tools in the shedHBMurphy is one of the sharper tools in the shedHBMurphy is one of the sharper tools in the shedHBMurphy is one of the sharper tools in the shedHBMurphy is one of the sharper tools in the shedHBMurphy is one of the sharper tools in the shedHBMurphy is one of the sharper tools in the shed
 
HBMurphy's Avatar
Name: Paul
Joined: Jun 2009, #18993
Location: So California Coast
Gender: Male
Posts: 5,729
HBMurphy's Tacoma Gallery
Quote:
Originally Posted by jcayce View Post
Best of both worlds:

http://www.chainreactioncycles.com/M...?ModelID=30752

Magura hydraulic rim brakes were an industry standard.
Hey thanks! I've been buggin a guy a ride with the do something with his brakes - they are SCARY!!! This would be a great way to go for him. Thanks!
  Reply With Quote
Old 01-03-2010, 04:01 PM   #14
Old & Forgetful
Janster is one of the sharper tools in the shedJanster is one of the sharper tools in the shedJanster is one of the sharper tools in the shedJanster is one of the sharper tools in the shedJanster is one of the sharper tools in the shedJanster is one of the sharper tools in the shedJanster is one of the sharper tools in the shedJanster is one of the sharper tools in the shedJanster is one of the sharper tools in the shedJanster is one of the sharper tools in the shedJanster is one of the sharper tools in the shed
 
Janster's Avatar
Name: Jandy
Joined: Mar 2007, #1138
Location: Lancaster, PA
Age: 46
Gender: Female
Posts: 12,864
Janster's Tacoma Gallery
It's not something you can bolt on and walk away.....

Drum to disc conversions also require different master cylinders & proportioning valves. And with the ABS / TRAC / etc - all those systems and where the computer control is involved.... You're better off not messing with it.

I converted my Jeep Wrangler from drums to discs. No ABS. No traction control. No computer input. I replaced the entire master cylinder to disc/disc master cylinder and the prop valve to disc/disc prop valve. It was better than before but it still wasn't ideal. THe jeep was my trail rig. I would never do that on a daily driver and feel SAFE.
  Reply With Quote
Old 01-03-2010, 05:57 PM   #15
YGWYPF
RainDodger is one of the sharper tools in the shedRainDodger is one of the sharper tools in the shedRainDodger is one of the sharper tools in the shedRainDodger is one of the sharper tools in the shedRainDodger is one of the sharper tools in the shedRainDodger is one of the sharper tools in the shedRainDodger is one of the sharper tools in the shedRainDodger is one of the sharper tools in the shedRainDodger is one of the sharper tools in the shedRainDodger is one of the sharper tools in the shedRainDodger is one of the sharper tools in the shed
 
RainDodger's Avatar
Navy: Naval Aviator
Joined: Nov 2009, #26412
Location: Great Northwest
Gender: Male
Posts: 353
RainDodger's Tacoma Gallery
I guess I'm old too. The brakes work just fine as they are so why spend big $$ just to spend big $$$ ?

The rear (drum brakes) on my my 1st gen were in really good shape when the truck went to it's new owner and it had 134,000 miles on it. They were the original brakes.
  Reply With Quote
Old 01-03-2010, 06:17 PM   #16
Make mine a Double!
skistoy has much to be proud ofskistoy has much to be proud ofskistoy has much to be proud ofskistoy has much to be proud ofskistoy has much to be proud ofskistoy has much to be proud ofskistoy has much to be proud ofskistoy has much to be proud ofskistoy has much to be proud ofskistoy has much to be proud of
 
skistoy's Avatar
Navy:
Name: Mike
Joined: Jul 2009, #19356
Location: Western New York
Gender: Male
Posts: 2,003
skistoy's Tacoma Gallery
If it ain't broke, dont fix it!
  Reply With Quote
Old 01-03-2010, 06:27 PM   #17
Senior Member
JeffRock is one of the sharper tools in the shedJeffRock is one of the sharper tools in the shedJeffRock is one of the sharper tools in the shedJeffRock is one of the sharper tools in the shedJeffRock is one of the sharper tools in the shedJeffRock is one of the sharper tools in the shedJeffRock is one of the sharper tools in the shedJeffRock is one of the sharper tools in the shedJeffRock is one of the sharper tools in the shedJeffRock is one of the sharper tools in the shedJeffRock is one of the sharper tools in the shed
 
JeffRock's Avatar
Joined: Mar 2009, #14910
Location: Capital region, NY
Age: 39
Gender: Male
Posts: 1,200
JeffRock's Tacoma Gallery
Quote:
Originally Posted by Brunes View Post
Folks who have tried the conversion (MJP2 is one I think) were not pleased with the performance. They are different systems and the truck was built to utilize the drums in the rear.

Both have up and downsides- Save your coin and upgrade your lines, fluid, and pads...Rotors if you want...but converting the rear end seems like thorwing money after something that isn't a problem...imho.
X3
  Reply With Quote
Old 01-03-2010, 06:53 PM   #18
Banned
kilgoja is a splendid one to beholdkilgoja is a splendid one to beholdkilgoja is a splendid one to beholdkilgoja is a splendid one to beholdkilgoja is a splendid one to beholdkilgoja is a splendid one to beholdkilgoja is a splendid one to beholdkilgoja is a splendid one to behold
Joined: Jun 2009, #18685
Location: Alabama
Gender: Male
Posts: 593
kilgoja's Tacoma Gallery
never had a problem with the rear drums on my '88 toyo truck...drove it well over 300,000 miles...i think i changed the pads once...maybe twice the whole time
  Reply With Quote
Old 01-28-2010, 07:37 AM   #19
Living vicariously through myself
mjp2 is one of the sharper tools in the shedmjp2 is one of the sharper tools in the shedmjp2 is one of the sharper tools in the shedmjp2 is one of the sharper tools in the shedmjp2 is one of the sharper tools in the shedmjp2 is one of the sharper tools in the shedmjp2 is one of the sharper tools in the shedmjp2 is one of the sharper tools in the shedmjp2 is one of the sharper tools in the shedmjp2 is one of the sharper tools in the shedmjp2 is one of the sharper tools in the shed
 
mjp2's Avatar
Name: Milton Juevos Portimous II
Joined: Feb 2007, #924
Location: NJ
Gender: Dude
Posts: 17,034
mjp2's Tacoma Gallery
Quote:
Originally Posted by Brunes View Post
Folks who have tried the conversion (MJP2 is one I think) were not pleased with the performance. They are different systems and the truck was built to utilize the drums in the rear.

Both have up and downsides- Save your coin and upgrade your lines, fluid, and pads...Rotors if you want...but converting the rear end seems like thorwing money after something that isn't a problem...imho.
x27. Just stumbled on this thread while searching for something else. Figured I'd provide the details here too.

Quote:
Originally Posted by mjp2 View Post
Rear discs, calipers, installation, new master cylinder, proportioning valve and time spent tuning it, etc. Disc brakes require less pressure but more volume than drum brakes, so you're looking at swapping out the full system.

I converted to rear discs almost 2 years ago and I'm still not done with the project. At this point I've scrapped the entire ABS system, plumbed new steel brake lines, am running manual brakes, and am on my 3rd master cylinder.

None of that addresses the caliper clearance issues that'll come up. My calipers are mounted behind the rotor and nearly wore a hole through my rear shock from rubbing during articulation. Expect to have to fabricate custom shock mounts both on the frame and on the axle to make sure nothing rubs.

I still have worse braking performance than I did with the rear drums and the parking brake has trouble holding the truck in place.


Get yourself some SP Performance slotted rotors and Hawk pads from RaceShopper.com, some stainless steel braided lines from All Pro, install them and call it a day. That'll firm up the pedal and knock about 20 feet off the 60-0 stopping distance.
  Reply With Quote
Old 01-28-2010, 09:38 AM   #20
Senior Member
S-M-R-T will become famous soon enoughS-M-R-T will become famous soon enough
Joined: Feb 2009, #13548
Location: Prince George, BC
Gender: Male
Posts: 121
S-M-R-T's Tacoma Gallery
Quote:
Originally Posted by Brunes View Post
Folks who have tried the conversion (MJP2 is one I think) were not pleased with the performance. They are different systems and the truck was built to utilize the drums in the rear.

Both have up and downsides- Save your coin and upgrade your lines, fluid, and pads...Rotors if you want...but converting the rear end seems like throwing money after something that isn't a problem...imho.
The price is out to lunch on the tundraracing kit.

Rear disks have more potential then drums but that doesn't mean that they are always an easy swap. Disk brake calipers often require more fluid then the drums so the stock brake master isn't designed to push that much fluid to the rear lines. Most guys running rear disks add a residual valve to help. Smaller calipers that require less fluid can help as well. As was mentioned before, the hard part is not putting on the disks; it is designing a system that all works together so that the disks can perform to potential.

The front brakes still do ~75% of the braking so your money would probably be better spent up front first. Also if you if you improve the rear greatly it can throw off the bias and still end up with worse braking overall then stock, or end up having to tune out most of the performance increase to maintain the bias.
  Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
Drum Brake Conversion 03coma Technical Chat 13 03-06-2013 10:39 PM
Rear disc-brake conversion DallasPre Technical Chat 25 06-12-2012 10:21 AM
No brake system forum section, converting drum-to-brake question InactiveUser 1st Gen. Tacomas 9 01-02-2012 09:48 PM
Tacoma rear brake disc conversion BUZZ5 2nd Gen. Tacomas 5 11-16-2009 02:02 PM
Drum to Disc Conversion? Taco505 4 Cylinder 15 07-10-2009 06:08 AM


Copyright © 2014 Tacoma Forum. Tacoma World is not owned by, or affiliated with Toyota Motor Corporation.