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#1 |
Registered User
Join Date: Nov 2003
Location: Mandan, ND
Posts: 422
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Has anyone out there( Iknow someone has) taken a rear end with limited slip or posi out of later model trucks and put in their 67-72? I currently have a one wheel burnout monster of a truck, but want more traction. I am sure there has to be some modifications for that to be done. WHat other options are there out there? Can I replace the insides of my rear axle to accompolish this?
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Life is full of choices and a Chevy is the best choice. 1990 Chevy SWB |
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#2 |
Registered User
Join Date: Jun 2002
Location: Knoxville Tenn.
Posts: 3,058
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Had same problem. Got a Eaton Posi unit from Reider Racing. (other places carry it also). All you have to do is take your ring gear off your present carrier and install it on the new Eaton carrier and reinstall in rear end. I didn't have to adjust anything. Piece of cake. Now I can lay down 2 lines of rubber.
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56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer |
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#3 |
Registered User
Join Date: Jul 2003
Location: So. Cal.
Posts: 389
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Check out www.markwilliams.com. Under their specials section they have eaton posi for $310. That's a deal if you can afford a new one. You can usually pick up new gears for another $150 and bearing kit for another $100.
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1968 Chev SWB with 1998 Corvette LS1 305hp and 320 ftlb to the wheels (stock engine!) AEM EMS and wideband O2 sensors Bowtie Overdrive's 700R4, stage 3 Baer 4 wheel discs and 20s http://iciclelanding.com/aperture?album=2049&view=album |
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#4 |
Merciless Butcher
Join Date: Oct 2003
Location: CC Nevada
Posts: 1,447
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Nothing beats a good two legger burnout.
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Your Bought And Sold....I Got Your Soul! |
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#5 |
Registered User
Join Date: Apr 2003
Location: missouri city, tx
Posts: 4,486
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70 longbed 496/th400/Ford 9" |
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#6 |
67-72 Addict!
Join Date: Feb 2002
Location: The TAX State!
Posts: 7,857
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I paid $280 for my Eaton at www.tomsdifferentials.com
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Jim 1970 C/10 Fleetside w/Ghost Flames Lowered 4.5" front and 4" rear (Raked) 355/350 Turbo w/shift kit 10" Redneck Performance Verter w/2500 stall Hooker Super Comps part#2808-1 Performer RPM Air-Gap 12 Bolt w/3:73 gears- Eaton Posi Comp Cams XE262 with 1.6 Crane Energizers, Road Demon 625 and Brodix IK 180 heads |
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#7 |
Registered User
Join Date: Nov 2003
Location: Mandan, ND
Posts: 422
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So how many different parts will I need to switch out my current setup?
I know I need the eaton posi unit. What are the gears and the bearing kit? jhow66 says use existing gears and Injected68LS1 says to get new ones. THanks guys
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Life is full of choices and a Chevy is the best choice. 1990 Chevy SWB |
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#8 |
67-72 Addict!
Join Date: Feb 2002
Location: The TAX State!
Posts: 7,857
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I paid $25 extra for new bearings and races. I reused my 3:73 gears.
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Jim 1970 C/10 Fleetside w/Ghost Flames Lowered 4.5" front and 4" rear (Raked) 355/350 Turbo w/shift kit 10" Redneck Performance Verter w/2500 stall Hooker Super Comps part#2808-1 Performer RPM Air-Gap 12 Bolt w/3:73 gears- Eaton Posi Comp Cams XE262 with 1.6 Crane Energizers, Road Demon 625 and Brodix IK 180 heads |
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#9 | |
Registered User
Join Date: Aug 2003
Location: Louisville, TN
Posts: 338
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Quote:
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PR Too many projects, not enough time! 72SWB 350/350TH, 3500stall,525 lift cam 3:73 posi. Sold! 69LWB Flatbed 350/Super T-10, ported/polished 481 heads, 480 lift cam. 78SWB 468/400TH, ported/polished Alum. heads, 3:42 posi, 3000 stall on 17x8 and 18x9.5's 77 Jeep CJ-5 304V8 fiberglass body on 36" Ground Hawgs |
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#10 |
Registered User
Join Date: Nov 2003
Location: Mandan, ND
Posts: 422
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What gear ration should I use for my truck?
402 BB Turbo 400 tranny. I think it currently has 3.07, but I am not for sure.
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Life is full of choices and a Chevy is the best choice. 1990 Chevy SWB |
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#11 |
67-72 Addict!
Join Date: Feb 2002
Location: The TAX State!
Posts: 7,857
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What is the intended use and what tire height are you running?
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Jim 1970 C/10 Fleetside w/Ghost Flames Lowered 4.5" front and 4" rear (Raked) 355/350 Turbo w/shift kit 10" Redneck Performance Verter w/2500 stall Hooker Super Comps part#2808-1 Performer RPM Air-Gap 12 Bolt w/3:73 gears- Eaton Posi Comp Cams XE262 with 1.6 Crane Energizers, Road Demon 625 and Brodix IK 180 heads |
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#12 |
Try spinnin 4 rear tars
Join Date: Sep 2003
Location: Salt Lake City, Utah
Posts: 757
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Well, where do you drive it...
I mean, do you use the truck for just cruizing around town, interstate driving, hauling/pulling? A 3.07 would be great if you drive the truck long distances, it will help your mpg. If you stay in town or tow, I would choose a 3.73, or even a 4.10 for more grunt ![]()
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SWEET7T 1970 C10, 2wd, LB, 307/TH350/3.08. PS, PB |
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#13 |
Vortec in the works
Join Date: Nov 2003
Location: Spring,Texas
Posts: 735
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I have 2 12 bolt 3.73 rear ends 1 wheel peel, would it be best to put the eaton posi unit in rather than buying a complete rear end ??
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68? It's all figured out untill you get it apart. Is it Sunday yet??? 68 Project 68 SWB frame off/98 Vortec with stock FI/power everything. 95 ECLB 2500 with 346,000 on the clock(the original HD) 99 Lesabre-wifes ride 08 Crew Cab LTZ-All Mine 89 SWB 5/7 drop-Son's first ride. |
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#14 |
Registered User
Join Date: Jun 2002
Location: Knoxville Tenn.
Posts: 3,058
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72superBB I had the same setup as yours ( 402-400turbo-3.07 gear). If it is your daily driver the 3.07 will be fine. Just add new carrier bearings like the other guys say. That plus a gasket and Posi fluid will be all you need.
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56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer |
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