dixie_boysles
11-18-2012, 09:32 AM
Written By: dixie_boysles (http://www.fordrangerforum.com/members/dixie_boysles.html)
Discalimer: Neither I nor this site takes any responsibility in any damage or actions resulting from this . When performing this, you are doing so at your own risk
In this how-to I will be showing you my method to replacing the gear oil in your rear differential. There may be other ways, but this is the way that I found best. This was for my 04' Lariat with 3.73 Limit Slip.
Materials needed:
- 3 Qrts of 75W-140 Synthetic Gear Oil (I used Mobil 1) (your truck may call for different fluids)
- 1 Tube of TransX Friction Modifier (for people with limited slip only!!!)
- 1 tube of RTV Sealant
- 1 Can of brake cleaner
- Old Rags
Tools Needed:
- 3/8" Drive Ratchet
- 1/2" Socket
- Extension
- 1/2" wrench if needed
- razor blade or gasket scraper
- Hammer
- Oil Drain pan
Tips:
- Wear old cloths as you dont want gear oil or rtv sealant on you
- I wore medical gloves to keep the smelly gear oil off my hands (that stuff stinks)
- you should always loosen the fill plug before you start the job to make sure the plug will come out. You'll be in a tough situation if you pull the pan, drain the fluid, re-install the pan then find out you can't get the fill plug out.
Procedure:
Gather Materials:
http://i694.photobucket.com/albums/vv308/dixie_boysles/Pictures/2012-11-17_11-10-48_126.jpg
http://i694.photobucket.com/albums/vv308/dixie_boysles/Pictures/2012-11-17_11-12-33_673.jpg
http://i694.photobucket.com/albums/vv308/dixie_boysles/Pictures/2012-11-17_11-32-16_962.jpg
http://i694.photobucket.com/albums/vv308/dixie_boysles/Pictures/2012-11-17_11-28-15_153.jpg
Put truck in park and apply brake. Place Oil catch pan under rear differential
http://i694.photobucket.com/albums/vv308/dixie_boysles/Pictures/2012-11-17_11-11-43_4.jpg
http://i694.photobucket.com/albums/vv308/dixie_boysles/Pictures/2012-11-17_12-57-28_208.jpg
Using the 1/2" Ratchet or Wrench, start loosening all of the bolts
I took them all out but the top Two, used them to hold the cover so it wouldnt fall for the next step.
http://i694.photobucket.com/albums/vv308/dixie_boysles/Pictures/2012-11-17_11-10-02_40.jpg
http://i694.photobucket.com/albums/vv308/dixie_boysles/Pictures/2012-11-17_11-20-57_532.jpg
Once that is done, it's time to break the seal. Using a combination of the screw driver and the hammer, try to pry away the bottom of the cover from the axle. dont force too much in one area.
http://i694.photobucket.com/albums/vv308/dixie_boysles/Pictures/2012-11-17_11-18-02_938.jpg
Then oil should start to drain
http://i694.photobucket.com/albums/vv308/dixie_boysles/Pictures/2012-11-17_11-20-49_44.jpg
When it drain all the oil then go ahead and remove the remaining two top bolts.
http://i694.photobucket.com/albums/vv308/dixie_boysles/Pictures/2012-11-17_11-24-37_746.jpg
Use the razor blade to clean both mating surfaces on the axle and cover
http://i694.photobucket.com/albums/vv308/dixie_boysles/Pictures/2012-11-17_11-32-53_860.jpg
http://i694.photobucket.com/albums/vv308/dixie_boysles/Pictures/2012-11-17_11-24-43_259.jpg
Use brake cleaner to clean the gears and the back of the diff cover
http://i694.photobucket.com/albums/vv308/dixie_boysles/Pictures/2012-11-17_11-30-26_557.jpg
http://i694.photobucket.com/albums/vv308/dixie_boysles/Pictures/2012-11-17_11-57-16_286.jpg
Once both surfaces are clean, apply RTV sealant around all the holes and a good solid bead around the perimeter of the cover
http://i694.photobucket.com/albums/vv308/dixie_boysles/Pictures/2012-11-17_12-09-41_403.jpg
Put cover on and hand tighten all the bolts, let RTV dry for an hour then tighten completely using a cross bolt pattern similar to tightening lugs for wheels.
Using the 3/8" drive ratchet, loosen oil drain plug
http://i694.photobucket.com/albums/vv308/dixie_boysles/Pictures/2012-11-17_12-57-43_624.jpg
http://i694.photobucket.com/albums/vv308/dixie_boysles/Pictures/2012-11-17_13-02-47_541.jpg
Once loose, begin filling. I mixed my friction modifier with a qrt before putting it in. fill until the oil is level with the fill hole. Plug the hole. Done.
Discalimer: Neither I nor this site takes any responsibility in any damage or actions resulting from this . When performing this, you are doing so at your own risk
In this how-to I will be showing you my method to replacing the gear oil in your rear differential. There may be other ways, but this is the way that I found best. This was for my 04' Lariat with 3.73 Limit Slip.
Materials needed:
- 3 Qrts of 75W-140 Synthetic Gear Oil (I used Mobil 1) (your truck may call for different fluids)
- 1 Tube of TransX Friction Modifier (for people with limited slip only!!!)
- 1 tube of RTV Sealant
- 1 Can of brake cleaner
- Old Rags
Tools Needed:
- 3/8" Drive Ratchet
- 1/2" Socket
- Extension
- 1/2" wrench if needed
- razor blade or gasket scraper
- Hammer
- Oil Drain pan
Tips:
- Wear old cloths as you dont want gear oil or rtv sealant on you
- I wore medical gloves to keep the smelly gear oil off my hands (that stuff stinks)
- you should always loosen the fill plug before you start the job to make sure the plug will come out. You'll be in a tough situation if you pull the pan, drain the fluid, re-install the pan then find out you can't get the fill plug out.
Procedure:
Gather Materials:
http://i694.photobucket.com/albums/vv308/dixie_boysles/Pictures/2012-11-17_11-10-48_126.jpg
http://i694.photobucket.com/albums/vv308/dixie_boysles/Pictures/2012-11-17_11-12-33_673.jpg
http://i694.photobucket.com/albums/vv308/dixie_boysles/Pictures/2012-11-17_11-32-16_962.jpg
http://i694.photobucket.com/albums/vv308/dixie_boysles/Pictures/2012-11-17_11-28-15_153.jpg
Put truck in park and apply brake. Place Oil catch pan under rear differential
http://i694.photobucket.com/albums/vv308/dixie_boysles/Pictures/2012-11-17_11-11-43_4.jpg
http://i694.photobucket.com/albums/vv308/dixie_boysles/Pictures/2012-11-17_12-57-28_208.jpg
Using the 1/2" Ratchet or Wrench, start loosening all of the bolts
I took them all out but the top Two, used them to hold the cover so it wouldnt fall for the next step.
http://i694.photobucket.com/albums/vv308/dixie_boysles/Pictures/2012-11-17_11-10-02_40.jpg
http://i694.photobucket.com/albums/vv308/dixie_boysles/Pictures/2012-11-17_11-20-57_532.jpg
Once that is done, it's time to break the seal. Using a combination of the screw driver and the hammer, try to pry away the bottom of the cover from the axle. dont force too much in one area.
http://i694.photobucket.com/albums/vv308/dixie_boysles/Pictures/2012-11-17_11-18-02_938.jpg
Then oil should start to drain
http://i694.photobucket.com/albums/vv308/dixie_boysles/Pictures/2012-11-17_11-20-49_44.jpg
When it drain all the oil then go ahead and remove the remaining two top bolts.
http://i694.photobucket.com/albums/vv308/dixie_boysles/Pictures/2012-11-17_11-24-37_746.jpg
Use the razor blade to clean both mating surfaces on the axle and cover
http://i694.photobucket.com/albums/vv308/dixie_boysles/Pictures/2012-11-17_11-32-53_860.jpg
http://i694.photobucket.com/albums/vv308/dixie_boysles/Pictures/2012-11-17_11-24-43_259.jpg
Use brake cleaner to clean the gears and the back of the diff cover
http://i694.photobucket.com/albums/vv308/dixie_boysles/Pictures/2012-11-17_11-30-26_557.jpg
http://i694.photobucket.com/albums/vv308/dixie_boysles/Pictures/2012-11-17_11-57-16_286.jpg
Once both surfaces are clean, apply RTV sealant around all the holes and a good solid bead around the perimeter of the cover
http://i694.photobucket.com/albums/vv308/dixie_boysles/Pictures/2012-11-17_12-09-41_403.jpg
Put cover on and hand tighten all the bolts, let RTV dry for an hour then tighten completely using a cross bolt pattern similar to tightening lugs for wheels.
Using the 3/8" drive ratchet, loosen oil drain plug
http://i694.photobucket.com/albums/vv308/dixie_boysles/Pictures/2012-11-17_12-57-43_624.jpg
http://i694.photobucket.com/albums/vv308/dixie_boysles/Pictures/2012-11-17_13-02-47_541.jpg
Once loose, begin filling. I mixed my friction modifier with a qrt before putting it in. fill until the oil is level with the fill hole. Plug the hole. Done.