thanks again.

lastly, i suppose the purpose of the TSB is to take it to the Ford dealer so that they know exactly what Im talking about?

I mean, I know what Im talking about... The TSB is already telling me what I know...??? It is not helping me any.

<TABLE style="BORDER-RIGHT: black 1px solid; BORDER-TOP: black 1px solid; BORDER-LEFT: black 1px solid; BORDER-BOTTOM: black 1px solid"><TBODY><TR><TD>TSB data for: 1999 FORD EXPEDITION</TD></TR><TR><TD>Bulletin Number: 15123</TD></TR><TR><TD>Sequence Number: 624629</TD></TR><TR><TD>Date: 20010801</TD></TR><TR><TD>Component Name: 105000 POWER TRAIN:DRIVELINE</TD></TR><TR><TD>Make: FORD</TD></TR><TR><TD>Model: EXPEDITION</TD></TR><TR><TD>Year: 1999</TD></TR><TR><TD>Summary:</TD></TR><TR><TD>SOME VEHICLES MAY EXHIBIT A DRIVELINE VIBRATION AT SPEEDS BETWEEN 60-70 MPH. *SLC</TD></TR></TBODY></TABLE>

I'd change the fluid and add the modifier and see how it goes.

The Full Text TSB's are great...the others, well, you can see if someone on this site can get you the Full Text (which is what I'd do, start another thread with that title) or take it to the dealer like you said.

as far as friction modifier, I am quite a novice at doing anything myself, is this something I can do on my own?

yes, it's added just like the fluid is, same hole! you might have to suction some fluid out.

you can buy aftermarket (never tried any, but have Amsoil in my garage waiting for a good day) or go to the dealer...

I'm glad I'm starting a real job soon....I just realized how many posts I've made on this site and www.bobistheoilguy.com today.... LOL

thanks! You're going to think I'm a putz, but where does it go?

in your rear end!!!

of your truck that is! depends on the truck, some, you have to remove the differential cover, some have a fill hole.

ok i just took a peak under and i dont see a fill hole, how do you fill it if the cover needs to be removed?

Has to be a fill hole somewhere. If not on the rear cover look on the other side, probably passengers side.

On a lot of rear ends, it's a threaded plug with a square 3/8" hole in it. You put the extension of a 3/8" ratchet in there and loosen. If there is fluid up to the hole, you will have to remove a bit of fluid to make room for the modifier. Remove with a fluid-sucker, or an old turkey baster with a little hose on the end... remove the amount that you are going to replace.

I just bought this so i can do my front/rear this weekend....and it'll be a lot easier doing drain and fills with PS and Brake master cylinder.....that 4.5oz mityvac is nice, but slow.


http://www.harborfreight.com/cpi/cta...emnumber=93477
http://www.harborfreight.com/cpi/gifs/clear.gif

rysylvstr,


nice one. what is the 4.5oz. mityvac you are talking about?

http://www.harborfreight.com/cpi/pho...3499/93477.gif

Nice... I'll have to get 2 of these... one for the garage, and one for the bar!!!

I was wondering, I filled my rear end with mobil1 and 4 oz of friction modifier, but somewhere I read that mobil1 and royal purple, among some others, already have the friction modifier added in the oil, I dont know it that is true, do you guys know if its true or not?

http://www.mityvac.com/pages/products_hvpk.asp

<TABLE cellSpacing=0 cellPadding=0 border=0><TBODY><TR><TD width=27></TD><TD width=430>07000 Automotive Tune-up and



Brake Bleeding Kit

This is the original Mityvac hand vacuum/pressure pump kit used by service professionals worldwide for performing hundreds of automotive diagnostic and mechanical tests, and for one-person brake bleeding. The 07000 kit contains our most popular Selectline<TT><SUP>®</SUP></TT> hand vacuum/pressure pump with vacuum gauge and accessories.

</TD><TD width=164>http://www.mityvac.com/images/products/hvpk_07000.gif



High Quality Image <TABLE cellSpacing=0 cellPadding=0 border=0><TBODY><TR><TD></TD></TR><TR><TD width=164>User Manual











</TD></TR><TR><TD></TD></TR><TR><TD>Specifications Sheet






</TD></TR></TBODY></TABLE>








</TD><TD class=maintext width=9>





</TD></TR><TR><TD></TD><TD colSpan=2><TABLE cellSpacing=0 cellPadding=5><TBODY><TR><TD vAlign=top colSpan=2>Includes:





</TD></TR><TR><TD vAlign=top colSpan=2>

• Selectline hand vacuum/pressure pump (Model No. MV6203) with 2" (50 mm) diameter gauge
• 4.5 oz. (135 ml) fluid reservoir bottle with fluid transfer and storage lids
• (7) Tapered adapters for connecting to tubing from .090" to .50" ID (2.3 mm to 13 mm)
• (2) Tapered manifold plugs
• (3) Bleed screw adapters
• (2) 1/4" ID x 24" long (6.4 mm ID x 610 mm long) connection tubes
• 5/32" ID x 1/4" ID (4 mm ID x 6.4 m ID) tubing adapter
• 1/4" ID x 1 1/2" long (6.4 mm ID x 40 mm long) connection tube
• 5/32" ID x 3" long (4 mm ID x 75 mm long) connection tube
• 1/4" ID x 3 5/8" long (6.4 mm ID x 90 mm long) connection tube
• Rubber cupped adapter
• User manual (English/French/Spanish/German)

</TD></TR><TR class=maintext><TD vAlign=top></TD><TD vAlign=top></TD></TR><TR class=maintext><TD vAlign=top width=299>Specifications:





</TD><TD vAlign=top width=299>





</TD></TR><TR><TD vAlign=top width=299 height=108>Packaged Weight:


Packaged Size:
Pump Displacement:
Max. Vacuum:
Max. Pressure:
Gauge Indication:


</TD><TD vAlign=top width=299>1.2 lbs (0.54 kg)


12" x 10" x 1 1/4" (305 mm x 250 mm x 32 mm)
1 cu. in. (16 cc) per stroke
25 in. Hg (85 kPa)
25 psi (172 kPa)
0 - 30 in. Hg (0 - 100 kPa)

</TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE>

....find online or even at harbor freight.

What do you guys make of this? The vibration only happens in 2HI, when I put the truck in A4WD the rumble goes away.