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| Rear end ? | |
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| Tweet Topic Started: Feb 7 2010, 09:44 PM (332 Views) | |
| 1320B4U | Feb 7 2010, 09:44 PM Post #1 |
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"Miley Cyrus Club Pres"
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I'm going to be installing my rear pretty soon i recently picked up. Borg Warner posi/disc w/3:27:1. Just have a few questions and want to know if i'm leaving anything out. (rear is from an '85 t/a). 1. I know i will need a proportioning value. 2. I'm hearing conflicting stories about master cylinder upgrade or not...currently have rear drums...do i need to upgrade the master cylinder due to increased fluid holding volume?? 3. Torsen diff vs. regular locker type posi. Do i need to add the additive? I thought the additive was always necessary. ...just want to make sure i get everything needed before the swap begins..thanks |
![]() 1991 R/S..1992 L98 Firehawk Tribute (sold)..1999 c5/t56 (sold)..2012 z-71 | |
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| black83zee | Feb 7 2010, 10:15 PM Post #2 |
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Media Specialist
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Torsens don't need the additive...that's for posi's with clutch type mechanisms. Rear discs need a different prop. valve. than drum rears. I don't know about the M/C. |
350, carb, headers, side exhaust, T-5, aluminum ds, Baer discs, Bilsteins, tubular a-arms, tubular torque arm, adjustable track bar and control arms. | |
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| CanadianChris | Feb 7 2010, 11:34 PM Post #3 |
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Logo Designer
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I swapped to a read disc in my car out of an 02 LS Camaro. You def need a new prop valve but the master will be just fine. I will let you know if I can find the receipt for the prop valve I got. Its a stock GM part for a Disc/Disc Car. -Chris |
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| charged355 | Feb 8 2010, 12:26 AM Post #4 |
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Nythirdgen Founder
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U need a disk disk brake prop valve the master is the same no aditive unless it's posi |
![]() Custom Forged 355 / Solid roller cam/valvetrain / Victor Jr heads / Hurricane Intake/ Accufab 1250cfm Throttle body / MegaSquirt 3 Engine Managment/ 1000cc SouthBay Injectors/ 7.6:1 CR / 4" Custom Single Exhaust / 4000 Circle D Stall/ CK Performance Billet 4L80 FMVB Trans Brake / 3" Chromoly Driveshaft / Full UMI Tubular Rear Suspension / Moser/Strange 9" / 4:11 gears Detroit Locker / Sumped LS1 gas tank / A1000 Fuel pump / A1000 FPR / Paxton Fuel filter / -10 Fuel line -8 return / Borg Warner S475 Turbo @10psi/ JGS 50mm WG & 56mm BOV / PA Racing Complete Tubular Front End Kit With Coilovers / Full Autometer Dash / Custom Black Suade Guts / Built by yours truly/ Tuned by George the EFI whiz http://www.youtube.com/channel/UCnxlPhzRElZYM5YE-n2NRUw | |
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| 1320B4U | Feb 8 2010, 09:55 AM Post #5 |
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"Miley Cyrus Club Pres"
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thanks, It is a posi. so i'll get the additive. What year did the torsen posi's come in?? |
![]() 1991 R/S..1992 L98 Firehawk Tribute (sold)..1999 c5/t56 (sold)..2012 z-71 | |
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| rustrider73 | Feb 8 2010, 12:50 PM Post #6 |
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Advanced Member
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borg warner rears use steel cones instead of clutch disc's, I would use the additive. you need to push more volume of fluid for disc's, the master cyl has a bigger bore and piston for 4 wheel disc,two listings one for drum and one for disc. your brakes will work with the drum prop valve but to work right you should use an adjustable valve like the Willwood part |
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| 1320B4U | Feb 8 2010, 02:41 PM Post #7 |
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"Miley Cyrus Club Pres"
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Thanks man...appreciate it |
![]() 1991 R/S..1992 L98 Firehawk Tribute (sold)..1999 c5/t56 (sold)..2012 z-71 | |
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| black83zee | Feb 8 2010, 05:05 PM Post #8 |
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Media Specialist
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They didn't start using the Torsen until the 4th gens. |
350, carb, headers, side exhaust, T-5, aluminum ds, Baer discs, Bilsteins, tubular a-arms, tubular torque arm, adjustable track bar and control arms. | |
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7:37 PM Jul 10