Changing diff oil - Blazer Forum - Chevy Blazer Forums

General Tech Help Good at troubleshooting? Have a non specific issue? Discuss general tech topics here.

Changing diff oil

 
 
 
 
  #1  
Old 11-27-2006, 09:23 PM
New Member
Thread Starter
Join Date: Nov 2006
Posts: 59
joey is an unknown quantity at this point
Default Changing diff oil

Hello
I have a 98 blazer LT 4wd and I was wondering what the best way is to change the front differential oil. I’ve read that these have drain plugs and some say they don’t. If not, then is there some place I can get a pump to suck all the old crap out? I just bought the thing and found both the input and passenger stub shaft seals are leaking. I figured old fluid may have caused this. Anyways this weekend I plan to tackle both seals and would like to put in fresh synthetic lube in the front and rear diffs. I will remove the cover on the rear to drain the oil. Any advice would be appreciated.
 
  #2  
Old 11-27-2006, 10:50 PM
Join Date: Aug 2006
Location:
Posts: 135
lochenjons is an unknown quantity at this point
Default RE: Changing diff oil

Im doing the same thing for the rear, not really for maintance but I have to find out what gears are back there. Anyways, if I were you I'd use that rtv gasket maker stuff (the black one) instead of getting a new gasket for the cover, I've heard it works a lot better. Just my $.02
 
  #3  
Old 11-27-2006, 10:52 PM
Beginning Member
Join Date: Oct 2006
Location:
Posts: 33
mellon101 is an unknown quantity at this point
Default RE: Changing diff oil

You will just have to crawl under there and look.

From what I gather....most DO have drain plugs, but my 96 darn sure didnt.

I just used a little pump and got out all that I could. I am going to repeat the process here in a few months to try to get the maximum amount of good fluid in there. What came out was butt nasty.
 
  #4  
Old 11-27-2006, 11:22 PM
Beginning Member
Join Date: Oct 2006
Location:
Posts: 33
mellon101 is an unknown quantity at this point
Default RE: Changing diff oil

As far as the RTV goes... that is what I was planning to do, but I ended up giving up and buying a gasket.

The sway bar was so close to the cover.... I could not keep from smearing the RTV when I was trying to position the cover back into place. Maybe there is a trick I don't know about.
 
  #5  
Old 11-27-2006, 11:32 PM
swartlkk's Avatar
Administrator
Join Date: May 2005
Location: Waterloo, NY
Posts: 40,756
swartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond repute
Default RE: Changing diff oil

I would rather use the gasket. I just find it easier to get in place within the confines listed above. I also find that gaskets are easier to clean up after. But then, that's for the rear diff...

On the front diff, there should be a drain plug. On some cases, this is one of the lower most bolts. If not, then you may have to use a small hand pump to suck out the old fluid. Then refill with new fluid through the fill plug.
 
 
 
 
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
jakem
Steering, Suspension & Drivetrain
5
04-22-2011 12:34 AM
Big O
2nd Gen S-series (1995-2005) Tech
2
01-28-2010 11:38 PM
Bad Ramer Jamer
2nd Gen S-series (1995-2005) Tech
28
07-14-2009 05:13 PM
BlazinMike89
Engine & Transmission
8
02-23-2009 01:26 AM
azblazer89
1st Gen S-series (1983-1994) Tech
9
07-26-2005 12:14 PM


Thread Tools
Search this Thread
Quick Reply: Changing diff oil


Advertising
Featured Sponsors
Vendor Directory

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.