Rear Diff
Thread Starter
|
Senior User
Joined: Dec 2006
Posts: 219
Likes: 0
From: Cincinnati, OH
Rear Diff
Ok, So i had to replace the rear pinion seal on my diff last night. book said that i needed a puller to get the yoke off of the spline in order to get to the seal, went to AZ and they told me there is no such tool and to just hit it off with a hammer. So i did that , after about 15 minutes of hammering i got it off and replaced the seal put it all back together and checked the fluid level.
Now (2 Days later) i am driving down the read and a hear a little while from the rear end when i let off of the pedal. So when i get home i check the fluid again this time when the little bit runs out of the fill hole it is sparkley and has a decent amount of metal in it
.
I have a road trip in 2 weeks, shoudl i just drain the fluid and put new in and check to see if it gets worse?
What could i have messed up?
any one have links to some good rear ends?
Now (2 Days later) i am driving down the read and a hear a little while from the rear end when i let off of the pedal. So when i get home i check the fluid again this time when the little bit runs out of the fill hole it is sparkley and has a decent amount of metal in it
. I have a road trip in 2 weeks, shoudl i just drain the fluid and put new in and check to see if it gets worse?
What could i have messed up?
any one have links to some good rear ends?
Fleet Mechanic
Joined: May 2005
Posts: 1,567
Likes: 3
From: Chattanooga
How did you put it back together? If you hear something, its done its damage. Did you check your backlash, or did you just leave the interior alone, replace the seal and tighten the yolk bolt back up? You may have knocked the pinion back and unless you used an impact on it to pull it back forward you may have unseated it from the front bearing and caused the gears to grind. These diffs have no tolerance for mistakes. Dont ask me how I know. Where in Ohio are you located?
Thread Starter
|
Senior User
Joined: Dec 2006
Posts: 219
Likes: 0
From: Cincinnati, OH
I put the seal, bolted teh yolk back on, bolted the driveshaft up to the yolk.
i left the interior alone.
when i had the yolk off i noticed that the pinion had left-right/up-down play in it, but not in and out.
Did not check for backlash, nor do i know how too.
thanks for your quick reply, i an buried in a repair manual now.
i left the interior alone.
when i had the yolk off i noticed that the pinion had left-right/up-down play in it, but not in and out.
Did not check for backlash, nor do i know how too.
thanks for your quick reply, i an buried in a repair manual now.
Fleet Mechanic
Joined: May 2005
Posts: 1,567
Likes: 3
From: Chattanooga
Yep this is what happened. You accidentally let the pinion move towards the ring gear. When you bolted it back together you can not get enouph torque to pull the pinion all the way forward without an impact gun. Just cant do it by hand. So now its gonna be a pain the ****. I really cant explain backlash, I can only do from feel. Most guys use a dial indicator and the book will tell you the thousands of play it suppost to have.
Thread Starter
|
Senior User
Joined: Dec 2006
Posts: 219
Likes: 0
From: Cincinnati, OH
ok so what i should do is get the impact out and tighten it up as much as possible? how will i know when its back to where it should be?
ps im in cincinnati
ps im in cincinnati
Last edited by dzzavid; May 5, 2007 at 10:33 AM.
Thread Starter
|
Senior User
Joined: Dec 2006
Posts: 219
Likes: 0
From: Cincinnati, OH
Trending Topics
Post Fiend
Joined: Apr 2004
Posts: 12,835
Likes: 3
From: Silver Lake Dunes, MI
yes that is the pinion grinding into the carrier. you may have thrashed your rear end already. I suggest you bring it to a shop who is good with differential to have them check it out. Once a diff starts making noise the damage is already done
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Ford Super Duty: 5 Things Owners LOVE, 5 Things They LOATHE!
Joe Kucinski
Every 2026 Ford Truck Engine RANKED from WORST to FIRST!
Michael S. Palmer
The Best F-150 Deal of Every Trim Level (XL through Raptor)
Joe Kucinski
Thread Starter
|
Senior User
Joined: Dec 2006
Posts: 219
Likes: 0
From: Cincinnati, OH
egh, not what i wanted to hear.
So the pinion nut needs to be tightened more?
any one have any links to a good place to buy differentials?
So the pinion nut needs to be tightened more?
any one have any links to a good place to buy differentials?
Last edited by dzzavid; May 5, 2007 at 04:41 PM.
Post Fiend
Joined: Apr 2004
Posts: 12,835
Likes: 3
From: Silver Lake Dunes, MI
if it is junk you will probably just need bearing and a pinion and ring gear. the carrier will be all right with those markings on it. More than likely yes the pinion was not tight enough or the bearing was going out prior to your seal install and that caused the leak in the first place.
Thread Starter
|
Senior User
Joined: Dec 2006
Posts: 219
Likes: 0
From: Cincinnati, OH
thanks for your help tim, im a newb when it comes to differentials, i thought i could handle a seal replacement heh, live and learn.
when i look up the part i have options for two different bearings cup and cone, which one do i need?
when i look up the part i have options for two different bearings cup and cone, which one do i need?
Thread Starter
|
Senior User
Joined: Dec 2006
Posts: 219
Likes: 0
From: Cincinnati, OH
Well i was looking at AZ web site but now i am here they seenm to have whole kits but i have noidea what i am looking for.
http://www.jawsgear.com/store/catalo...p?cPath=21_106
http://www.jawsgear.com/store/catalo...p?cPath=21_106
Post Fiend
Joined: Apr 2004
Posts: 12,835
Likes: 3
From: Silver Lake Dunes, MI
you will need one of these. probably the master install kit would be best
http://www.jawsgear.com/store/catalo...876fb4afa875ea
your rear axle is a sterling 10.5 inch. Your gear ratio is either 3.73 or 4.10. there should be a tag attched to one of the bolts on the diff cover. it will have some numbers on there that should match one of those two. if your not sure post all the info on that tag. if there is no tag check the door jam sticker on the drivers side door jamb. there will be a axle code there. post that if you need to.
I would not order that kit yet though til you find a shop to do the work. many shops won't install parts they didn't buy or they may have a better source. but having all the info never hurts.
http://www.jawsgear.com/store/catalo...876fb4afa875ea
your rear axle is a sterling 10.5 inch. Your gear ratio is either 3.73 or 4.10. there should be a tag attched to one of the bolts on the diff cover. it will have some numbers on there that should match one of those two. if your not sure post all the info on that tag. if there is no tag check the door jam sticker on the drivers side door jamb. there will be a axle code there. post that if you need to.
I would not order that kit yet though til you find a shop to do the work. many shops won't install parts they didn't buy or they may have a better source. but having all the info never hurts.