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 Re: Gen II brake master cyl swap- why?
[Re: hazy_daze]
#981625
01/20/10 02:41 PM
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Joined: May 2009
Posts: 306
Mudrunner
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The master cylinder I took off my friend's '86 was 7/8" bore, the V6 master was 15/16" diameter. (Corrected per Kevin C's post) Usually, the size is cast onto the side of the cylinder itself. Look at the one that's on the diesel to see if it's the large or small version.
Last edited by MartySoCal; 01/21/10 02:02 AM.
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Re: Gen II brake master cyl swap- why?
[Re: JohnnyBfromPeoria]
#981626
01/20/10 03:17 PM
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Joined: Jun 2003
Posts: 7,356
Trail Leader
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MMcV, you may have forgotten to mention that the reason he would want to swap his entire rear end is because those rears you mentioned have disc brakes.
John B. Yeah, that clarifies better as I was adding the locker parts. His first post said front/rear discs...
Big Truck: 00, 3.5, Endeavor, 5-Spd drive line in hand! Little Truck: 87, 2.6T I/C, MT, LSDs, Tonneau Top Her Truck: 03, 3.8, 20th Anniv, 65k Daughter's: 06 Eclipse, Keeping it Mitsu! FSMs: MitsubishiLinks.com
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Re: Gen II brake master cyl swap- why?
[Re: Kevin C]
#981627
01/20/10 08:06 PM
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Joined: Dec 2009
Posts: 111
OP
Wheeler
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First, sorry for not posting a signature with info sooner. Guess in the past on the FJ40 forums, I think I was a little sheepish about bragging about my rig since it was not a "high roller" and I never got in the habit. So to hell with humility.
Anyway, yeah... my rig is a diesel and the master is aluminum and I think the bore is 15/16" ? Does that sound right? I think that might be the better one ?
So it?s a no brainer that the Gen II calipers a big improvement over the genI, same with rear disks. This stuff will happen with time but for the moment I need to get the stock system working better. Good brake linings, no leaks, rebuilt master. I suspect that my vacuum pump is faulty, but have not yet gotten access to a guage to check it. ARe those diesel pumps get weak over time? Bet thats the problem.
thanks
Mark...
"We don?t need more health insurance, we need health ASSURANCE" Dr. Douglas Graham. http://curezone.com/90 Montero LWB 4D56 2.5 TDI, AT with OD, dual bouncy seats, H4 headlights, hellas, bull bar, 32" Wranglers and about to get some LEGS! 2001 Yamaha WR-426
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Re: Gen II brake master cyl swap- why?
[Re: Kevin C]
#981628
01/22/10 11:15 PM
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Joined: Jul 2009
Posts: 305
Mudrunner
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Maybe I missed it, But did somebody say that you can swap the 89 v6 SWB axle with drums to something with disc brakes?
89 V6 manual trans Dodge Raider frame 87 cold weather pkg 2" body lift, Soft 8's wraped in BFG km2 33x10.5x15, JDM Pajero yellow Bosch fogs. Yackama basket. Duel bouncies gen II rear springs,gen II ft brakes,master and booster.
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Re: Gen II brake master cyl swap- why?
[Re: bodyswapped8789]
#981629
01/22/10 11:39 PM
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Joined: Jun 2003
Posts: 7,356
Trail Leader
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Swap Gen I V6 rears with a Gen II with locker. (Most often found on 95-96 SRs.)
Big Truck: 00, 3.5, Endeavor, 5-Spd drive line in hand! Little Truck: 87, 2.6T I/C, MT, LSDs, Tonneau Top Her Truck: 03, 3.8, 20th Anniv, 65k Daughter's: 06 Eclipse, Keeping it Mitsu! FSMs: MitsubishiLinks.com
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Re: Gen II brake master cyl swap- why?
[Re: MontyMcV]
#981630
01/25/10 09:07 PM
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Joined: Jul 2009
Posts: 305
Mudrunner
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Do you know what else I will need for the swap or someplace I can find out more info. (How to and whats needed?) what can a guy look to spend on a rear axle.
89 V6 manual trans Dodge Raider frame 87 cold weather pkg 2" body lift, Soft 8's wraped in BFG km2 33x10.5x15, JDM Pajero yellow Bosch fogs. Yackama basket. Duel bouncies gen II rear springs,gen II ft brakes,master and booster.
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