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07-15-2015, 03:32 PM
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#11
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Site Team
Join Date: May 2007
Location: Turlock Ca
Posts: 10,410
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Re: Sound when turning
The LSD situation can feel like a front end issue for sure and you'll (well I did) swear it's coming from up front when it's not. Seems like after a diff oil change I always have to go back and add more friction additive. That said true rubbing in the front is often different in feeling...at least how I've felt it. If you can feel the tread nubs rubbing, varying the speed will usually correlate to the rubbing and you'll know. But how the van leans in a turn might be different at different speeds.
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2006 Ford 6.0PSD EB-50/E-PH SMB 4X4 Rock Crawler Trailer
Sportsmobile 4X4 Adventures.......... On and off road adventures
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07-15-2015, 03:46 PM
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#12
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Senior Member
Join Date: Nov 2012
Location: boise idaho
Posts: 2,631
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Re: Sound when turning
^^^ interesting. finding out i have a lsd would be cool....guess i better look into that option and figure out if i do or not.
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"understeer is when you hit the wall with the front of your car, oversteer is when you hit the wall with the rear of your car, horsepower is how hard your car hits the wall, and torque is how far your car moves the wall."
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07-15-2015, 10:01 PM
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#13
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Site Team
Join Date: May 2007
Location: Turlock Ca
Posts: 10,410
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Re: Sound when turning
The first time I encountered this was way back when it was new after SMB did a diff oil change. Seemed like the only time I really felt it was making a turn while climbing an overpass. They couldn't replicate the problem and I took Heber for a ride. After I got it to chatter he got a smile on his face and said it might be coming from the rear. I still didn't believe it. He was right and all was well after they put more additive.
I have had rubbing though, especially since I went to 315's and if I pull the sway bar disconnects, it can be fairly obvious. Like I said it is a different feel. Even ripped up my front passenger bushwacker Now I really heard that one!
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2006 Ford 6.0PSD EB-50/E-PH SMB 4X4 Rock Crawler Trailer
Sportsmobile 4X4 Adventures.......... On and off road adventures
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07-15-2015, 10:29 PM
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#14
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Senior Member
Join Date: Dec 2009
Location: Phoenix, AZ
Posts: 468
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Re: Sound when turning
I am going to run by the dealer in Vegas on Friday and get some put in. Should I have them change out the old fluid?
TexGX
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TexGX
2003 7.3PSD RB50 Quigley (The Yeti)
viewtopic.php?f=10&t=13220
2006 Casita (Makes it a three bedroom 1 and 1/2 bath)
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07-16-2015, 09:13 AM
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#15
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Senior Member
Join Date: Apr 2012
Location: Philadelphia, PA
Posts: 4,215
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Re: Sound when turning
See my recent thread about LSD fluid. I really thought the noise was from the front, but it was the LSD.
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07-16-2015, 09:36 AM
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#16
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Senior Member
Join Date: Oct 2010
Location: Sacramento Delta, CA
Posts: 1,024
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Re: Sound when turning
OK, just a thought (or maybe a WAG offered in the spirit of trying to help).
Could the rubbing be from scuffing of your front tires on the pavement? Do you have ESOF front locking hubs? I drove my van inadvertently with the front hubs engaged for a year. The 4x4 converter had installed ESOF hubs at my request (in return for my payment) but instead of using the oem electric modulated vacuum pump (big vacuum to engage them, less vacuum to keep them engaged), he just hooked the ESOF up to the unmodulated nearly infinitely variable, way too strong, serpentine belt-driven brake vacuum pump. (You have a diesel, so you have a vacuum pump.) Well over time, the pump sucked the hubs inward to the permanent locked position, breaking off the little plastic tabs (Ford 2007 ESOF hubs) that hold the hubs in the unlocked position, such that even when I manually turned the hubs back out to unlocked position, they were in fact still engaged.
Just for giggles, you may want to unlock your hubs and have someone drive your van forward or back a foot or two while you watch to see if the transfer case driveshaft to the front differential spins. If it does, your hubs are, in fact, engaged.
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2002 E350 ext.; 160K; 7.3L; 4R100 (w/4x4 deep pan & filter); 4x4 conv. w/2007 F250/F350 coil frnt axle (oppos. dual Bilstein press. shocks cured DW) diff chg from 3.55 to 3.73 (bad!); BW1356 t.c. (bad!); LT265/70R17/E Michelin LTX M/S2; Engel MT60 Combi Fridge-Freezer; 4 BP 380J pv panels; Auragen 5kw AC gen. in top alt. position; Webasto Dual-Top; Voyager top. 1995 5.8L EB Bronco, bone stock.
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07-16-2015, 08:43 PM
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#17
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Senior Member
Join Date: Jul 2013
Location: So Cal
Posts: 4,108
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Re: Sound when turning
If we are going for WAGs how about low power steering fluid?
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2008 E350 RB passenger 4WD SMB penthouse
2013 KTM 350 EXC
2008 KTM 250 XCF-W
2003 Honda Element
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07-18-2015, 02:58 PM
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#18
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Senior Member
Join Date: Dec 2009
Location: Phoenix, AZ
Posts: 468
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Re: Sound when turning
Got to love this site. Stopped at Ford Country in Henderson NV on my way back from Vegas. For $30 they added the friction reducer and topped off diff fluid. It seems to have done the trick. Thanks for all the help.
TexGX
__________________
TexGX
2003 7.3PSD RB50 Quigley (The Yeti)
viewtopic.php?f=10&t=13220
2006 Casita (Makes it a three bedroom 1 and 1/2 bath)
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07-19-2015, 05:44 PM
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#19
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Senior Member
Join Date: Oct 2010
Location: Sacramento Delta, CA
Posts: 1,024
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Re: Sound when turning
You have limited slip in your front differential?
Glad you got it fixed!
__________________
2002 E350 ext.; 160K; 7.3L; 4R100 (w/4x4 deep pan & filter); 4x4 conv. w/2007 F250/F350 coil frnt axle (oppos. dual Bilstein press. shocks cured DW) diff chg from 3.55 to 3.73 (bad!); BW1356 t.c. (bad!); LT265/70R17/E Michelin LTX M/S2; Engel MT60 Combi Fridge-Freezer; 4 BP 380J pv panels; Auragen 5kw AC gen. in top alt. position; Webasto Dual-Top; Voyager top. 1995 5.8L EB Bronco, bone stock.
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07-24-2015, 11:04 PM
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#20
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Senior Member
Join Date: May 2011
Posts: 1,005
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Re: Sound when turning
Quote:
Originally Posted by E350
You have limited slip in your front differential?
Glad you got it fixed!
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No it was the rear, it just feels like the front because you feel the nibbling as you turn and move off.
I think I diagnosed that pretty well.
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Sportsmobile-less.
"A job worth doing is worth doing at least twice."
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