Easy guide to replacing transfer case/front prop shaft seal with home garage tools.
Note: can be adopted to aid in the replacement of diff and other similar seals.
Tools required:
-2 x large, flat blade screwdrivers
-1 x 30mm socket and breaker bar
-1 x 14mm Spanner
-1 x Hammer
-1 x Long 1/2inch extension bar (or equivalent long flat ended bar)
-1 x 10mm Hex key (Allan key)
-Fine emery paper
-Oil pan
-Rags
-A Jack and stand
Parts required:
-1 x replacement oil seal (aus$19.95 from Nissan)
-Appropriate Transfer case oil
-Can of degreaser (optional, but highly recommend)
-Tub of gasket sealing compound (optional, but highly recommend)
-Loctite (optional, but highly recommend)
Method:
Step 1;
- Crawl under and drain the transfer case oil.
Step 2;
- Crack the four 14mm nut and bolts that holds the front prop shaft uni-joint onto the short shaft that comes out from the Transfer case, do not undue the nuts all the way. Because the truck is in 2wd (or at least should be), if you jack up one front wheel of the ground you can turn the shaft by hand allowing you to access all bolts easily. Note: the bolt is held in place when undoing, you only need a spanner for the nut.
Step 3;
- Put the tuck into 4wd, you may have to drop the truck into gear and roll forward or back a touch (Hence why we only cracked the four bolts).
Step 4;
-Crawl back under and removed the four bolts. You can now push the shaft out the way, revelling a 30mm nut.
[attachment=2:2u5p5ox9]20140608_133932.jpg[/attachment:2u5p5ox9]
Step 5;
-Remove the nut. Heads up: this f**ker is tight. You will now be able to pull out the shaft, mine required a little tap the with persuasion decivice (hammer).
[attachment=1:2u5p5ox9]20140608_134851.jpg[/attachment:2u5p5ox9]
Step 6;
-If you have a seal puller that will fit, this would be a great time to use is. As there is a splined shaft in the way, mine would not fit. Using the two screw drivers CAREFULLY pry out the old seal, taking care not to damage/scratch the housing and/or the bearing behind the seal.
Step 7;
-As my shaft had a bit of pitting on it (as shown below), I spent some time with the emery paper to clean it up. Also, clean the housing where the outside of the seal sits. Take care not to get any **** into the transfer case.
[attachment=0:2u5p5ox9]20140608_135530.jpg[/attachment:2u5p5ox9]
Step 8;
-Apply a thin coat of the gasket sealing compound around the out edge of the new seal and push it, by hand, as far into the housing and you can get it. Then using a long, flat ended bar (1/2 inch extension bar for me) careful tap around the seal, hammering it into the housing, CAREFULLY! Lots of little taps, hitting opposite sides, rotating. Time and patience's is the key here, unless you have specialty tools. I can not stress enough that if you are not careful, you WILL damage the seal.
Step 9;
- Apply a thin coat of grease to the oil seal lips and to the (now smooth) shaft. And insert. (Hehe... dirty)
Step 10;
- Assembly is the reverse off disassembly, expect I applies a small drop of Loctite to the 30mm nut and 4x14mm nuts and bolts. .
Step 11;
-Fill the transfer case with oil (a dab of gasket sealing compound of the filler/drain plugs aid in sealing and prevents them seizing).
Step 12;
- Have a beer and feel pleased with a job well done!
Note: can be adopted to aid in the replacement of diff and other similar seals.
Tools required:
-2 x large, flat blade screwdrivers
-1 x 30mm socket and breaker bar
-1 x 14mm Spanner
-1 x Hammer
-1 x Long 1/2inch extension bar (or equivalent long flat ended bar)
-1 x 10mm Hex key (Allan key)
-Fine emery paper
-Oil pan
-Rags
-A Jack and stand
Parts required:
-1 x replacement oil seal (aus$19.95 from Nissan)
-Appropriate Transfer case oil
-Can of degreaser (optional, but highly recommend)
-Tub of gasket sealing compound (optional, but highly recommend)
-Loctite (optional, but highly recommend)
Method:
Step 1;
- Crawl under and drain the transfer case oil.
Step 2;
- Crack the four 14mm nut and bolts that holds the front prop shaft uni-joint onto the short shaft that comes out from the Transfer case, do not undue the nuts all the way. Because the truck is in 2wd (or at least should be), if you jack up one front wheel of the ground you can turn the shaft by hand allowing you to access all bolts easily. Note: the bolt is held in place when undoing, you only need a spanner for the nut.
Step 3;
- Put the tuck into 4wd, you may have to drop the truck into gear and roll forward or back a touch (Hence why we only cracked the four bolts).
Step 4;
-Crawl back under and removed the four bolts. You can now push the shaft out the way, revelling a 30mm nut.
[attachment=2:2u5p5ox9]20140608_133932.jpg[/attachment:2u5p5ox9]
Step 5;
-Remove the nut. Heads up: this f**ker is tight. You will now be able to pull out the shaft, mine required a little tap the with persuasion decivice (hammer).
[attachment=1:2u5p5ox9]20140608_134851.jpg[/attachment:2u5p5ox9]
Step 6;
-If you have a seal puller that will fit, this would be a great time to use is. As there is a splined shaft in the way, mine would not fit. Using the two screw drivers CAREFULLY pry out the old seal, taking care not to damage/scratch the housing and/or the bearing behind the seal.
Step 7;
-As my shaft had a bit of pitting on it (as shown below), I spent some time with the emery paper to clean it up. Also, clean the housing where the outside of the seal sits. Take care not to get any **** into the transfer case.
[attachment=0:2u5p5ox9]20140608_135530.jpg[/attachment:2u5p5ox9]
Step 8;
-Apply a thin coat of the gasket sealing compound around the out edge of the new seal and push it, by hand, as far into the housing and you can get it. Then using a long, flat ended bar (1/2 inch extension bar for me) careful tap around the seal, hammering it into the housing, CAREFULLY! Lots of little taps, hitting opposite sides, rotating. Time and patience's is the key here, unless you have specialty tools. I can not stress enough that if you are not careful, you WILL damage the seal.
Step 9;
- Apply a thin coat of grease to the oil seal lips and to the (now smooth) shaft. And insert. (Hehe... dirty)
Step 10;
- Assembly is the reverse off disassembly, expect I applies a small drop of Loctite to the 30mm nut and 4x14mm nuts and bolts. .
Step 11;
-Fill the transfer case with oil (a dab of gasket sealing compound of the filler/drain plugs aid in sealing and prevents them seizing).
Step 12;
- Have a beer and feel pleased with a job well done!
