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post #1 of 8 Old 12-30-2011, 04:51 AM Thread Starter
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Front differential questions

I noticed that the vent hose on top of the diff had broken and was just dangling so its getting dust, dirt and water in there. I'm going to drain it and fill with fresh tomorrow and replace that hose.

On the other end of the hose, where it's attached to the frame, I can see something inside of it, like a white piece of plastic, but nothing sticking out past the end. Is that supposed to be some sort of vent valve that's maybe broken off or is it supposed to look like a white plastic plug stuffed in the end of the hose?

Does the diff cover use a gasket?

What's the best fluid to put back in it?

Does it need any type of friction modifier added?

2005 CCSB 4x4 6.0L Harley
8" ProComp lift, 20" Rockstars, 37" Nittos, Fox Reservoir Shocks, Dual Fox stabilizers, 2008 Tailgate with camera, 4" Straight Piped (no muffs, no kitties), Nerfs, Lights, X3 tuned by IDP, CTS, Optima Red Tops, Line-X, AutoPage

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post #2 of 8 Old 12-31-2011, 05:09 AM Thread Starter
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Anyone?...anyone?...bueller?...bueller?

2005 CCSB 4x4 6.0L Harley
8" ProComp lift, 20" Rockstars, 37" Nittos, Fox Reservoir Shocks, Dual Fox stabilizers, 2008 Tailgate with camera, 4" Straight Piped (no muffs, no kitties), Nerfs, Lights, X3 tuned by IDP, CTS, Optima Red Tops, Line-X, AutoPage

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post #3 of 8 Old 12-31-2011, 10:31 AM Thread Starter
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2005 CCSB 4x4 6.0L Harley
8" ProComp lift, 20" Rockstars, 37" Nittos, Fox Reservoir Shocks, Dual Fox stabilizers, 2008 Tailgate with camera, 4" Straight Piped (no muffs, no kitties), Nerfs, Lights, X3 tuned by IDP, CTS, Optima Red Tops, Line-X, AutoPage

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post #4 of 8 Old 12-31-2011, 10:33 AM
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im not much help but i use rtv sealer there was never a gasket on mine. thats about all the info i can give you




06 king ranch dually. 4" silverline duals, sct x3 tuned by tony wildman.
arp studs rcd egr delete updated fpr 6.4 banjos warren 175/stock. stage 1 from mtw,
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post #5 of 8 Old 12-31-2011, 01:29 PM
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They make a gasket for the rear diff, you can get it at any parts store. The white piece is a one way valve i believe.

2004 F-350 6.0 6" suspension lift sitting on 35's 6spd MANUAL 4" Turbo Back Exhaust, AFE Air Box, (ARP Studs, New HG's and Complete EGR Delete by Josh at River City Diesel) Coolant Filter from Dfuser, Stainless Steel Up-Pipe from RCD, 4 gauge pillar with Autometer Phantom Series 1 gauges. Boost, Pyro, Fuel Pressure and Oil Temp. Shimmed FPR. Improved Banjo Bolts, Fabtechs all around with Procomp Steering stabilizer all from RCD
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post #6 of 8 Old 12-31-2011, 01:38 PM
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80W-90 Gear oil, no friction modifier since that is used for limited slip differentials and the front is an open diff.

No gasket, just use RTV

That thing is a one-way vent valve to keep water out
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post #7 of 8 Old 01-01-2012, 05:28 PM Thread Starter
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Yea, I never got any answers quick enough so I used RTV. Parts store said 'straight 90W' but they didn't have any. I used Castrol Syntec 75w-90.

The white plastic thing disintegrated when I tried to get it out, like powder. So I replaced the hose and it's pointed down in that clip on the frame rail which should be fine as long as I stay out of deep water till I get a replacement valve.

2005 CCSB 4x4 6.0L Harley
8" ProComp lift, 20" Rockstars, 37" Nittos, Fox Reservoir Shocks, Dual Fox stabilizers, 2008 Tailgate with camera, 4" Straight Piped (no muffs, no kitties), Nerfs, Lights, X3 tuned by IDP, CTS, Optima Red Tops, Line-X, AutoPage

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post #8 of 8 Old 01-01-2012, 06:20 PM
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Next time check out Lube Locker

I just decided to go back with the RTV but it's an option.

Brian


'05 F250 Harley-Davidson

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