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02-09-2014, 06:10 PM
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#1 |
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Registered User
Join Date: Sep 2012
Location: Columbia, SC
Posts: 549
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Surprise it's a posi!
So I was changing the diff fluid and to my surprise I have what looks like an Eaton rear end, four yellow springs in the middle. It's not on my spid and there was no metal tag or sticker. PO might have added it but idunno. 1971 GMC lwb 350 leaf rear 5 lug
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Life is too long to go slow...  71 GMC 1500 Super Custom LWB 350/350 AC(replaced w/vintage air)/PS/PB 2.5 CPP Spindle, 1" CPP Drop Spring, CPP Front and Rear Sway Bars/DJM Flip, new General Spring KC 5 spring pack, HEI /IntReg Alt 20x8.5 OldSkools 5" BS, 275/45 Falkens |
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02-09-2014, 07:19 PM
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#2 |
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Registered User
Join Date: Jul 2008
Location: Eastern Oregon
Posts: 2,377
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Re: Surprise it's a posi!
I have the same truck, drove it this week in 12in of snow for the first time ! We'll guess what ? I think I got a posi out back too ? Will check when it get warm again !
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71 C-20 07 Magnum RT AWD |
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02-09-2014, 07:27 PM
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#3 |
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Registered User
Join Date: Sep 2012
Location: Columbia, SC
Posts: 549
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Re: Surprise it's a posi!
Let us know. Black Betty did great on the icy roads here.
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Life is too long to go slow... 71 GMC 1500 Super Custom LWB 350/350 AC(replaced w/vintage air)/PS/PB 2.5 CPP Spindle, 1" CPP Drop Spring, CPP Front and Rear Sway Bars/DJM Flip, new General Spring KC 5 spring pack, HEI /IntReg Alt 20x8.5 OldSkools 5" BS, 275/45 Falkens |
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02-09-2014, 08:31 PM
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#4 |
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Registered User
Join Date: Aug 2013
Location: Manteca, California
Posts: 59
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Re: Surprise it's a posi!
It used to be that the posi units took a different oil than the non posi units. There was actually a tag that stated "use positive trackion fluid only". I know that last year I still had to use posi fluid in my Cobra Replica. Stock F**D 8.8 with 411 gears.
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02-09-2014, 09:00 PM
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#5 |
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Registered User
Join Date: Sep 2012
Location: Columbia, SC
Posts: 549
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Re: Surprise it's a posi!
The Mobil 1 I filled it with says good for no slip applications. Eaton recommends dino with GM additive which I have on the way from Summit in case it starts to chatter.
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Life is too long to go slow... 71 GMC 1500 Super Custom LWB 350/350 AC(replaced w/vintage air)/PS/PB 2.5 CPP Spindle, 1" CPP Drop Spring, CPP Front and Rear Sway Bars/DJM Flip, new General Spring KC 5 spring pack, HEI /IntReg Alt 20x8.5 OldSkools 5" BS, 275/45 Falkens |
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02-09-2014, 09:08 PM
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#6 | |
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Registered User
Join Date: Oct 2013
Location: Central Coast Ca.
Posts: 425
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Re: Surprise it's a posi!
Quote:
Locking dif's are IMO an absolute necessity in these old trucks. cheers JohnG |
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02-09-2014, 10:18 PM
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#7 |
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Registered User
Join Date: Dec 2012
Location: Tacoma WA
Posts: 274
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Re: Surprise it's a posi!
x2 besides one wheel wonder burnouts just don't do it for me
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