Blown rear diff? Log Out | Topics | Search
Moderators | Register | Edit Profile

DiscoWeb Bulletin Board » Message Archives » 2003 Archives - Discovery Technical » Archive through September 15, 2003 » Blown rear diff? « Previous Next »

Author Message
 

Mike J. (Mudd)
Member
Username: Mudd

Post Number: 107
Registered: 02-2002
Posted on Monday, September 08, 2003 - 11:34 am:   Edit Post Delete Post Print Post

I have high range and low range gears but nothing works unless I'm locked. When unlocked and I put it in gear I can look under the vehicle and see the rear driveline spinning.
So, If that is a broken rear diff. I may as well replace with a locker and bigger gears for bigger tires! Probably 265/75 which I had planned on anyway instead of 245/75s i have now. ARB and 4:11? Not sure how the ratios work or what would be best and where to get em. Oh crap, I guess I'll need axles too. I'm in San Diego.
Will I be OK in front wheel drive till the new parts get to me?
 

Brian Dickens (Bri)
Senior Member
Username: Bri

Post Number: 674
Registered: 08-2002
Posted on Monday, September 08, 2003 - 11:55 am:   Edit Post Delete Post Print Post

I would assume that you see the same spinning of the rear drive shaft when locked. Is that true, if so I would guess that the diff is blown.

You are correct. If you are thinking ARB, Gears and bigger tires, you should also consider axles at the same time.

Personally, I would not drive it until I got the drive shaft and 3rd member off to see what is the problem inside. You might get some idea, by just draining the diff (strain the oil to see any pieces parts), then reach in there with your finger to see if anything big is just laying in the bottom of the diff.

I wonder if it might also be comething in the tcase rear output?
 

Peter Matusov (Pmatusov)
Senior Member
Username: Pmatusov

Post Number: 1061
Registered: 09-2002
Posted on Monday, September 08, 2003 - 11:56 am:   Edit Post Delete Post Print Post

Mike,

I've driven my Disco in front wheel drive for about a week. I wouldn't abuse it, though.
I'd think it is more likely that one of the axleshafts snapped. If it's a diff, I could loan you a 3rd member (I live in San Diego). email me offline if you wish.

peter
 

Brian Dickens (Bri)
Senior Member
Username: Bri

Post Number: 675
Registered: 08-2002
Posted on Monday, September 08, 2003 - 12:02 pm:   Edit Post Delete Post Print Post

yeah while I was diagnosing, I also pulled the axel shafts. Easy to do and if it is the diff, they need to come out anyway.
 

Mike J. (Mudd)
Member
Username: Mudd

Post Number: 108
Registered: 02-2002
Posted on Monday, September 08, 2003 - 12:30 pm:   Edit Post Delete Post Print Post

more info.. I went out to see if the rear shaft was still spinning when in lock. Put the e break on and it wanted to move, unlocked, but accompanied by a small grinding noise. With no e-brake, no movement of the vehicle unless locked. Does that mean anything?
 

Peter Matusov (Pmatusov)
Senior Member
Username: Pmatusov

Post Number: 1063
Registered: 09-2002
Posted on Monday, September 08, 2003 - 01:04 pm:   Edit Post Delete Post Print Post

no

I can't even think of a way to tell a broken axle from a broken open diff without pulling the axles.
it is really easy to do.

peter
 

Mike J. (Mudd)
Member
Username: Mudd

Post Number: 109
Registered: 02-2002
Posted on Monday, September 08, 2003 - 01:15 pm:   Edit Post Delete Post Print Post

should that be my first/next check? Pull the axles? Thanks for the help! Mike
 

Mike J. (Mudd)
Member
Username: Mudd

Post Number: 110
Registered: 02-2002
Posted on Monday, September 08, 2003 - 01:33 pm:   Edit Post Delete Post Print Post

When jacked up, rear wheels spin freely in both directions even in park and lock?
 

Will Cupp (W_cupp)
Member
Username: W_cupp

Post Number: 67
Registered: 07-2003
Posted on Monday, September 08, 2003 - 01:45 pm:   Edit Post Delete Post Print Post

Sounds like an axle. Do like Mike said, it will only take 5 minutes to tell.
 

Mike J. (Mudd)
Member
Username: Mudd

Post Number: 111
Registered: 02-2002
Posted on Monday, September 08, 2003 - 02:03 pm:   Edit Post Delete Post Print Post

If it were and axle would both sides spin or just one? or is this not related?
 

Alan Bates (Alanb)
Senior Member
Username: Alanb

Post Number: 303
Registered: 07-2002
Posted on Monday, September 08, 2003 - 02:14 pm:   Edit Post Delete Post Print Post

Just pull the axles. Loosen lugnuts, jack up, remove wheel, remove five bolts with 14 or 15mm socket, slide axle out, inspect, you will know if it is busted or not.
 

Mike J. (Mudd)
Member
Username: Mudd

Post Number: 112
Registered: 02-2002
Posted on Monday, September 08, 2003 - 03:06 pm:   Edit Post Delete Post Print Post

Pulled one axle it looked fine, inspected further as I thought I heard something drop in the diff and saw this nice nipple sticking out of my pumpkin. Glad it didn't go all the way through. nice nipple
 

Brian Friend (Brianfriend)
Senior Member
Username: Brianfriend

Post Number: 1153
Registered: 09-2002
Posted on Monday, September 08, 2003 - 08:08 pm:   Edit Post Delete Post Print Post

Mike

Wow...I've never seen anything like that. There isn't a hole in the other side is there?:-)

I would say that most likely you broke the pin that holds the spider gears in place.
 

Steve Sherman (Ssherman)
Member
Username: Ssherman

Post Number: 89
Registered: 11-2002
Posted on Tuesday, September 09, 2003 - 09:22 am:   Edit Post Delete Post Print Post

Well Mike I feel your pain...I blew my rear differential this past weekend at Uwharrie. Luckily my '01 has CDL and we were able to pull the rear shaft and drive it home without any problem. I talked with my dealer and told them what had happened since it's still got about 5K left on the warranty and they said it would be covered. Calling LR Roadside to have it towed down to them today...we'll see.

Steve

Blown Rear Diff
 

Steve Sherman (Ssherman)
Member
Username: Ssherman

Post Number: 90
Registered: 11-2002
Posted on Tuesday, September 09, 2003 - 09:25 am:   Edit Post Delete Post Print Post

Besides the obvious hole, also notice the deformation of the housing near the fill plug.

Steve
 

Richard D. Cronin (Wldkgdm)
New Member
Username: Wldkgdm

Post Number: 3
Registered: 09-2003
Posted on Tuesday, September 09, 2003 - 06:16 pm:   Edit Post Delete Post Print Post

Generally, it is the spider gears or the pins that hold them in the cage. In my case it was both. I just finished removing my rear carrier and put in a Detroit (only because i got a good deal on it) I wont be driving it much on the road, just to the trail, on the trail and home again. If one shaft is broke the other shouldn't move freely in gear. Just the broken one. If the spider gears (and/or pins holding them) fail, then you can move both wheels freely while still in gear (provided there isn't any shrapnel interfereing with the spider cage movement). Remove the old diff (carrier, whatever)put in a on demand locker or true-trak and you'll be rid of the weak Rover diff complex. Do, if you have the cash, upgrade your axles. I haven't yet, but that is just due to lack of funds at the moment. Godd Luck!
 

Richard D. Cronin (Wldkgdm)
New Member
Username: Wldkgdm

Post Number: 4
Registered: 09-2003
Posted on Tuesday, September 09, 2003 - 06:17 pm:   Edit Post Delete Post Print Post

Good Luck too!
 

Alex Cabrera (Alexcabrera)
Member
Username: Alexcabrera

Post Number: 142
Registered: 12-2002
Posted on Tuesday, September 09, 2003 - 07:50 pm:   Edit Post Delete Post Print Post

been there done that! the easy on the wallet alternative is ebay. Search under rover differential and I bought mine for less than $100. It is still going strong.

Only thing on mine was that the housing was busted wide open. About 2 inches. General consensus was welding. Has been welded with new diff. No problems all summer.

Topics | Last Day | Last Week | Tree View | Search | User List | Help/Instructions | Program Credits Administration