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LinkBack (16) | Thread Tools |
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#1
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Insane Network Engineer
Join Date: Dec 2002
Posts: 5,967
Location: Pittsburgh, PA. User is: OffLine ![]() |
Well I got the new rear end in! I had wanted disc brakes for a long time, I came across a good deal on a g80 (limited slip posi) rear w/ disc brakes from a 99 blazer. It only had 33k on the rear and I got it for $180.00 bux! YAY.... So I finally get around to installing it this weekend with the help of Grappler...(Thanx once again bud)...
The install is fairly straight forward: (see notes at the end of this page): So I started by picking up the rear at my local wrecking yard. It's been sitting in mud for almost a year (the back end of the blazer it was on had no wheels and it's a messy yard)... Here is the rear...As you can see there is a lot of surface rust... ![]() Fortunatly the emergency brake shoes were in good shape as seen here... Grappler taking a break before the installation... (see ending notes) ![]() The dust shields were toast (rusted and bent) so I pulled the diff cover, then the axels and put new ones on.. In this pic you can see on the left side how bad they were banged up... on the right side I had already removed the dust shield...I also took the opprotunity to change the diff fluid... Sprayed out the casing with 2 cans of brake clean, let dry, then added Valvoline Durablend (dino/synthetic mix) 80/90 weight gear oil. ![]() I used a wire wheel on an air rotary tool to get any scaling and debri (i.e mud) off of the casing. I then used a spray on rust inhibitor/converter/primer and let it sit overnight. (actually a couple of days because I couldn't get back to it). I then put on 2 coats of Rustolium Black w/ hammered finish on to it. This gives the benifit of being less rusty later on (gads I hate salt) and it actually looks good. I may do my whole frame in the stuff. Here's a pic of it when it was half painted. You can see on the right the finished product while on the left it's still bare. Definatly an improvement. ![]() I then cleaned up the calipers. Ground out the dirt and grease on the calipers themselves (aluminum, not iron, very light weight!) then cleaned and painted the actual caliper frame in the same color as I painted the rear itself. In this pic I had test fitted the newly cut rotors and the calipers.... They came out very well... ![]() rear side... ![]() Once the new rear was finally ready for installation we of course had to pull the old one... This was simply a matter of diconnecting the vent hose, brake line T, emergency brake lines, u-bolts, drive shaft. Remember when you pull the u-joint, run some tape around both the end caps so they don't fall off when manuervering the shaft around. Then we jacked it up and slid it out lengthwise.... My baby don't got back... ![]() Here is the old rear in all it's glory (and salt) ![]() Installtion is the same as extraction, just in reverse.... Grappler taking a break before the installation... ![]() Without Caliper but with caliper frame: Note.. I took the opprotunity to install red polyeurethayne bushings on my swaybar to replace the OEM 10 year old rubber bushings.... ![]() With full caliper installed. ![]() Angle 2 ![]() Finally when you've reattached all your brake lines, simply bleed all the air out of the calipers and lines. Test drive, enjoy!!!! Some notes and conclusions: Overall this is not a difficult swap. If I had been less concerned about the type of rear I was getting (g80) there is actually an easier way to do this. The above will work on 84 to current... This will also work... If you want to add OEM stock disc brakes to your EXISTING drum rear without changing the whole rear you would only need the following.... All 98 and up parts (these will work all the way down to 86) Backing plates (27.00 per side ) Calipers (30.00) Caliper frames (20.00) Pads ($20.00) Discs (36.00 per side at advance auto parts) OR a loaded caliper from Advance autoparts (includes frame, pads, calipers, bolts, et-al) Stock bolts Dust shields (12.00 per side at the dealer) Brake lines to the caliper...($15.00 each) Simply remove your old shoes and the backing plates, install the new backing plates then the calipers, etc... Bleed and go... EMERGENCY BRAKE INSTALLATION.. From the center of the body you will see a bracket where your pedal cable and your ebrake cables. From the bracket to the backing plates, those 2 cables will need to be replaced ($23.00 per side at the dealer) as the drum style has different ends and won't work with the new setup.. (This is only for 95 to current, 94 and below have a completely different cabling system so you would have to figure out on your own on how to go about making the ebrake work) Definatly better stopping power than with my drums, the overall upgrade was well worth it. Overall time was about 4 hours (this included breaks and what not) |
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#2 |
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Washed out of Louisiana
Age: 32
Join Date: Dec 2002
Posts: 2,358
Location: Vancouver, WA User is: OffLine ![]() |
Re: Drum to Disc brake rear end swap how-to!
great man, that lt1 needs to slow down faster, thanks
I need to go pillage soem yards for a g80 soon , like before I start attaching the 4 link |
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#3 |
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Got SuperRam?
Join Date: Aug 2002
Posts: 85
Location: Pittsburgh User is: OffLine ![]() |
Re: Drum to Disc brake rear end swap how-to!
gezz, whos that lazy bum helpin you?! need to get him off his fat arse and get some work done! now if only the swap went as easily as this write up did!
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#4 |
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Insane Network Engineer
Join Date: Dec 2002
Posts: 5,967
Location: Pittsburgh, PA. User is: OffLine ![]() |
Re: Drum to Disc brake rear end swap how-to!
All told it was fairly easy (with the exception of the razor blade in your shoulder...and me whacking you in the head with the jack handle! And I keep wanting to work on your swaps dammit! |
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#5 |
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Got SuperRam?
Join Date: Aug 2002
Posts: 85
Location: Pittsburgh User is: OffLine ![]() |
Re: Drum to Disc brake rear end swap how-to!
swaps? im not doing no stinking swaps.
just need a job i get paid the same at and work less.. so i can get my bills paid and get out to clean the garage and get some decent progress done on them. yeah the razor blade did suck! |
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#6 |
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Insane Network Engineer
Join Date: Dec 2002
Posts: 5,967
Location: Pittsburgh, PA. User is: OffLine ![]() |
Re: Drum to Disc brake rear end swap how-to!
Become a male prostitute... Cmon, afterall you love to whore yourself for parts!!! ![]() |
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#7 |
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Got SuperRam?
Join Date: Aug 2002
Posts: 85
Location: Pittsburgh User is: OffLine ![]() |
Re: Drum to Disc brake rear end swap how-to!
ill remember that the next time you need to work out of my garage.. who the whore is for what..
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#8 |
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Insane Network Engineer
Join Date: Dec 2002
Posts: 5,967
Location: Pittsburgh, PA. User is: OffLine ![]() |
Re: Drum to Disc brake rear end swap how-to!
I'll just send "you know who" to move in with you...But let me say, for the record, I have always appreciated any help you've given me, be it advice or physical help... k, back to the cracks... giggidy giggidy giggidy |
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#9 |
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Slow Ass Member
Age: 28
Join Date: Oct 2001
Posts: 1,401
Location: Monroeville (Pittsburgh) PA User is: OffLine ![]() |
Re: Drum to Disc brake rear end swap how-to!
nice rick............ look andy is alive... wholey hell
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#10 |
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Insane Network Engineer
Join Date: Dec 2002
Posts: 5,967
Location: Pittsburgh, PA. User is: OffLine ![]() |
Re: Drum to Disc brake rear end swap how-to!
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#11 |
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MiNi tRucKiN' oN A buDgET
Age: 23
Join Date: Jan 2004
Posts: 867
Location: Courtice, Ontario, Canada User is: OffLine ![]() |
Re: Drum to Disc brake rear end swap how-to!
this should proolly be inthe how to section shouldnt it?? very good swap instructions tho, makes me wanna swap my rear end
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#12 |
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nascar fan
Age: 20
Join Date: May 2004
Posts: 2,546
Location: Creedmoor, NC User is: OffLine ![]() |
Re: Drum to Disc brake rear end swap how-to!
nice work man
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#13 |
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It's a Blazer.
Age: 31
Join Date: Feb 2004
Posts: 520
Location: Jessup, Maryland User is: OffLine ![]() |
Re: Drum to Disc brake rear end swap how-to!
I Guess I'll give this a try. I need to get the truck on the road again. I guess I get any axle w/ drums and just swap my discs equipment over to it.
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#14 |
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God I hate you guys
Age: 21
Join Date: Apr 2005
Posts: 168
Location: South Jersey User is: OffLine ![]() |
Re: Drum to Disc brake rear end swap how-to!
are there any codes on the rears themselves that can give me the ratio of the rear?
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#15 |
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God I hate you guys
Age: 21
Join Date: Apr 2005
Posts: 168
Location: South Jersey User is: OffLine ![]() |
Re: Drum to Disc brake rear end swap how-to!
nevermind i just searched and i guess there isnt
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#16 |
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Mini Trucker...
Age: 20
Join Date: Dec 2004
Posts: 1,467
Location: PA User is: OffLine ![]() |
Re: Drum to Disc brake rear end swap how-to!
off hand do u guys know if the rear like the one u picked up is the same length as one under a pickup? I am looking to swap my rear out of my 98 pickup for a g80 rear with discs out of a blazer.....
Thanks Chris |
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#17 |
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God I hate you guys
Age: 21
Join Date: Apr 2005
Posts: 168
Location: South Jersey User is: OffLine ![]() |
Re: Drum to Disc brake rear end swap how-to!
I think the 2wd rears are 2" shorter than a 4wd rear, other than that 2wd ones are the same.
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#18 |
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Insane Network Engineer
Join Date: Dec 2002
Posts: 5,967
Location: Pittsburgh, PA. User is: OffLine ![]() |
Re: Drum to Disc brake rear end swap how-to!
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#19 |
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It's a Blazer.
Age: 31
Join Date: Feb 2004
Posts: 520
Location: Jessup, Maryland User is: OffLine ![]() |
Re: Drum to Disc brake rear end swap how-to!
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#20 |
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God I hate you guys
Age: 21
Join Date: Apr 2005
Posts: 168
Location: South Jersey User is: OffLine ![]() |
Re: Drum to Disc brake rear end swap how-to!
Why is this not a sticky? I will be doing this soon, thanks rlith, your how tos have helped me with a few things. Do you need brake lines from a 98+ or will the 94-97 brake lines work?
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#21 |
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Insane Network Engineer
Join Date: Dec 2002
Posts: 5,967
Location: Pittsburgh, PA. User is: OffLine ![]() |
Re: Drum to Disc brake rear end swap how-to!
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#22 |
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God I hate you guys
Age: 21
Join Date: Apr 2005
Posts: 168
Location: South Jersey User is: OffLine ![]() |
Re: Drum to Disc brake rear end swap how-to!
alright thanks a lot
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#23 |
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God I hate you guys
Age: 21
Join Date: Apr 2005
Posts: 168
Location: South Jersey User is: OffLine ![]() |
Re: Drum to Disc brake rear end swap how-to!
Found my 3.73 rear today in my dad's pile of s10 stuff. I now have it all(well i gotta get calipers but i have cores). I should have it done soon and I will post pictures up on my car domain.
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#24 |
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God I hate you guys
Age: 21
Join Date: Apr 2005
Posts: 168
Location: South Jersey User is: OffLine ![]() |
Re: Drum to Disc brake rear end swap how-to!
got my new calipers and painted up my brackets. The pads are rusty but rather than buy new pads i used some that we had lying around. I will have pics of my rear when i clean it up and paint it tomorrow. And on saturday i am doing the swap so i will have pics.
![]() Last edited by Watrboy821 : 11-17-2005 at 05:46 PM. |
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#25 |
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Registered User
Age: 23
Join Date: Feb 2004
Posts: 715
Location: Auburn, Al User is: OffLine ![]() |
Re: Drum to Disc brake rear end swap how-to!
Will the directions for the drum to disc swap (with the axle that is under the truck) work with the 8.5 too? Just curious. I may get around to doing that one of these days.
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#26 |
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God I hate you guys
Age: 21
Join Date: Apr 2005
Posts: 168
Location: South Jersey User is: OffLine ![]() |
Re: Drum to Disc brake rear end swap how-to!
the calipers on an 8.5in rear are the same calipers that are on a 7.5in rear. I know this because i have a couple 8.5in rears sitting around. The brake change should be any different.
Last edited by Watrboy821 : 11-17-2005 at 08:55 PM. |
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#27 |
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God I hate you guys
Age: 21
Join Date: Apr 2005
Posts: 168
Location: South Jersey User is: OffLine ![]() |
Re: Drum to Disc brake rear end swap how-to!
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#28 |
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low 18s all day baby
Age: 27
Join Date: Dec 2005
Posts: 12
Location: phx User is: OffLine ![]() |
Re: Drum to Disc brake rear end swap how-to!
if you buy all the disc parts and bolt them to a drum rearend how does the e brake work? is the existing shoe setup compatible with the new rotors?
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#29 |
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Insane Network Engineer
Join Date: Dec 2002
Posts: 5,967
Location: Pittsburgh, PA. User is: OffLine ![]() |
Re: Drum to Disc brake rear end swap how-to!
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#30 |
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low 18s all day baby
Age: 27
Join Date: Dec 2005
Posts: 12
Location: phx User is: OffLine ![]() |
Re: Drum to Disc brake rear end swap how-to!
not to be a bug since im new but can anyone post pics of a brake swap instead of a rearend swap. i dont care what car the parts are from as long as ist oem bolt on ill do it. i get smokin deals on replacement parts and i like to keep it cheap. thx in advance
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#31 |
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Insane Network Engineer
Join Date: Dec 2002
Posts: 5,967
Location: Pittsburgh, PA. User is: OffLine ![]() |
Re: Drum to Disc brake rear end swap how-to!
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