Go Back   DodgeForum.com > Dodge Trucks > Dodge Ram > 2nd Gen Ram Tech
Sign in using an external account
Register Forgot Password?


2nd Gen Ram Tech 1994-2001 Rams: This section is for TECHNICAL discussions only, that involve the 1994 through 2001 Rams. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.

Which Dif is this ? Limited slip or Open - Pics

Reply
 
 
 
 
Thread Tools Search this Thread
  #1  
Old 09-26-2013, 06:06 PM
dixonmusic dixonmusic is offline
Amateur
 
Join Date: Jan 2012
Vehicle: 98 ram 1500 slt Laramie 2wd 5.2/01 Dakota Quad 3.9L 2WD
Posts: 32
Default Which Dif is this ? Limited slip or Open - Pics

I just got a 98 1500 5.2 Automatic 2WD Ext Cab, sticker under hood say's:

DMD 3.5 Axle ratio
DRB Rear Axle Chrysler 9.25
DSA Limited Slip Differential

Do i have Limited Slip Dif (LSD) that needs additive and 4.5 pints of oil OR Open that doesn't need additive and ? pints.

My Pics seem to say otherwise ?? or do they

Thanks for help.

DD in SC
2001 Dodge Dakota Quad Cab 3.9 Auto 2wd
1998 Dodge Ram 1500 Ext Cab 5.2 Auto 2wd
This ad is not displayed to registered and logged-in members.
Register your free account today and become a member on Dodge Forums!

Last edited by dixonmusic; 10-01-2013 at 08:54 PM..
Reply With Quote
  #2  
Old 09-26-2013, 06:14 PM
AtomicDog AtomicDog is offline
All Star
 
Join Date: Sep 2012
Vehicle: 1996 Dodge Ram 2500 5.9 Magnum 4x4 SLT
Location: Central VA
Posts: 988
Default

Looks open to me based upon the pictures. Perhaps, someone switched out the guts of the diff or the entire rear axle.
Reply With Quote
  #3  
Old 09-26-2013, 08:18 PM
dhvaughan's Avatar
dhvaughan dhvaughan is offline
Hall Of Fame
 
Join Date: Jul 2006
Vehicle: 01 1500 4wd
Location: Gainesville, Ga.
Posts: 12,207
Default

its open.
see the side gears on each side with the axle shaft ends poking through.
and the cross pin from top to bottom
and all the open space between (no clutches or springs).
__________________
01 1500 Reg Cab 4wd 5.2 auto 3.55 285/75/16 steps tow hooks sc3815 180 3923 trans cooler filter posilok powertrax (removed) timbren britebox pioneer head rockford amp speaker cobra cb firestick hughes plenum water pump timing chain oil pump rear main hub bearings brakes shocks cracked dash cad bushings seals ujoints trackbar tcase Robert Griffin Trans
Reply With Quote
  #4  
Old 09-26-2013, 08:23 PM
kejobe's Avatar
kejobe kejobe is offline
Record Breaker
 
Join Date: Aug 2010
Vehicle: '13 Wrangler Sport S 3.6L Auto
Location: Ohio
Posts: 2,168
Default

As stated, open.
__________________
(S)OLDER2001 Ram 1500 4x4 QCSB 5.2L
(S)OLD2005 GMC 1500 4X4 Z71 Crew Cab
NEW2013 Jeep Wrangler Sport S 3.6L Auto
Reply With Quote
  #5  
Old 09-26-2013, 08:51 PM
merc225hp's Avatar
merc225hp merc225hp is offline
Champion
 
Join Date: Oct 2009
Vehicle: Big Black Ram
Location: N/A
Posts: 4,663
Default

Well I don't think its a open diff, the lsd clutch pack is behind the side gears and that is not clear in the pix he has posted.
__________________

Built, 5.9, Clocked/indexed Np241, Dana 60 diff swap. Built by me not bought!
Reply With Quote
  #6  
Old 09-26-2013, 08:58 PM
dodge dude94 dodge dude94 is offline
Banned
 
Join Date: Jun 2010
Vehicle: 1998 Ram 1500 QCSB 360 4x4
Location: East Texas
Posts: 8,923
Default

I would say to floor it on a dirt road, but if it is LSD, that's a great way to trash it if you don't have additive.

Then again, when in doubt, just add the additive. Still cheaper than a rear end rebuild if you screw up.
Reply With Quote
  #7  
Old 09-26-2013, 09:21 PM
kejobe's Avatar
kejobe kejobe is offline
Record Breaker
 
Join Date: Aug 2010
Vehicle: '13 Wrangler Sport S 3.6L Auto
Location: Ohio
Posts: 2,168
Default

Quote:
Originally Posted by dodge dude94 View Post
I would say to floor it on a dirt road.
Doesn't mean anything. My BMW left two marks on concrete, but it has a open diff.

Easiest way to check is to lift the rear up and spin one tire by hand. If the other tire spins the same direction it's "posi", if it spins opposite, it's open.
__________________
(S)OLDER2001 Ram 1500 4x4 QCSB 5.2L
(S)OLD2005 GMC 1500 4X4 Z71 Crew Cab
NEW2013 Jeep Wrangler Sport S 3.6L Auto
Reply With Quote
  #8  
Old 09-26-2013, 09:30 PM
merc225hp's Avatar
merc225hp merc225hp is offline
Champion
 
Join Date: Oct 2009
Vehicle: Big Black Ram
Location: N/A
Posts: 4,663
Default

I had one over in the barn ready to ship so I opened it up to take some picks for the Op.

Op here are some picks you can use for reference.



Lsd disk pack behind the side gear.



Side view

__________________

Built, 5.9, Clocked/indexed Np241, Dana 60 diff swap. Built by me not bought!
Reply With Quote
  #9  
Old 09-26-2013, 09:47 PM
stewie01's Avatar
stewie01 stewie01 is offline
Legend
 
Join Date: Mar 2011
Vehicle: 2001 Ram 1500 4x2 360V8
Location: Independence, Virginia
Posts: 8,566
Default

Quote:
Originally Posted by kejobe View Post
Doesn't mean anything. My BMW left two marks on concrete, but it has a open diff.

Easiest way to check is to lift the rear up and spin one tire by hand. If the other tire spins the same direction it's "posi", if it spins opposite, it's open.
Same my with open diff....
__________________
"This place is an X-file, wrapped in a cover-up and deep-fried in a paranoid conspiracy."
Reply With Quote
  #10  
Old 09-26-2013, 09:57 PM
dodge dude94 dodge dude94 is offline
Banned
 
Join Date: Jun 2010
Vehicle: 1998 Ram 1500 QCSB 360 4x4
Location: East Texas
Posts: 8,923
Default

I wouldn't know, as I don't have an open diff in my Ram. And the 76 makes too much damn power to only spin one wheel.
Reply With Quote
  #11  
Old 09-26-2013, 11:12 PM
ReadRam ReadRam is offline
Captain
 
Join Date: Jul 2010
Vehicle: 01 Ram 1500 slt 5.9 2wd
Location: fargo, n.d
Posts: 740
Default

I could see my clutch packs from the same angle as picture. I say it's an open. Really just guessing. Spin the wheels.
__________________
01,Ram,slt,1500/2wd ,RCLB/5.9, 21#red factory injectors/lsd diff/ 100,000mi now,/ no rust/med bronze pearlct. Ebay plenum repair, Cloyes 3028x double roller, Monroe load adjusting coil over rear shocks/ 245/75/16 load range E.

Last edited by ReadRam; 09-26-2013 at 11:58 PM..
Reply With Quote
  #12  
Old 09-27-2013, 07:25 AM
dixonmusic dixonmusic is offline
Amateur
 
Join Date: Jan 2012
Vehicle: 98 ram 1500 slt Laramie 2wd 5.2/01 Dakota Quad 3.9L 2WD
Posts: 32
Default Follow Up

Ok, First : reason i pulled dif in first place was because of grinding roaring in reverse just after i got truck.

Second: i have the truck parked in my driveway which is on incline, so to test by jacking up rear to turn wheels would mean putting in neutral... then truck would run over me as i lie underneath .. doh ..ouch.

Will try and get better pics Or just fill and with oil and additive no matter what ? I'm Trying to assess drive gear whilst its open, so sealing it back up voids that chance..
Reply With Quote
  #13  
Old 09-27-2013, 08:48 AM
kejobe's Avatar
kejobe kejobe is offline
Record Breaker
 
Join Date: Aug 2010
Vehicle: '13 Wrangler Sport S 3.6L Auto
Location: Ohio
Posts: 2,168
Default

Quote:
Originally Posted by dodge dude94 View Post
I wouldn't know, as I don't have an open diff in my Ram. And the 76 makes too much damn power to only spin one wheel.
It's about grip, not power. If there is equal grip with both drive wheels, both are likely to spin. If you were to have one wheel on grass/dirt and the other on pavement/concrete and hit the gas, then you'll know if there's an LSD or not. Open will spin only the wheel on grass/dirt (less grip). LSD will leave a mark on the pavement/concrete also. Providing the LSD is operational.
__________________
(S)OLDER2001 Ram 1500 4x4 QCSB 5.2L
(S)OLD2005 GMC 1500 4X4 Z71 Crew Cab
NEW2013 Jeep Wrangler Sport S 3.6L Auto
Reply With Quote
  #14  
Old 09-27-2013, 10:06 AM
mctdi mctdi is offline
Amateur
 
Join Date: Jan 2010
Vehicle: 1997 RAM1500 360 Auto 4x4
Posts: 45
Default

Quote:
Originally Posted by dixonmusic View Post
Ok, First : reason i pulled dif in first place was because of grinding roaring in reverse just after i got truck.

Second: i have the truck parked in my driveway which is on incline, so to test by jacking up rear to turn wheels would mean putting in neutral... then truck would run over me as i lie underneath .. doh ..ouch.

Will try and get better pics Or just fill and with oil and additive no matter what ? I'm Trying to assess drive gear whilst its open, so sealing it back up voids that chance..
Put cover back on and fill diff with all but a few ounces. Drive to safe place to block front wheels, and raise rear tires of pavement. From side of truck by hand spin one tire, and look under truck to see if other tire spins the same direction. If you can bring someone along, have them try to hold the other tire while you spin the one by hand. Both tires spin together equals LSD. Add as needed additive or/and gear lube to top off.
__________________
1997 RAM1500 360 w/auto 4x4
Reply With Quote
  #15  
Old 09-27-2013, 10:16 AM
mctdi mctdi is offline
Amateur
 
Join Date: Jan 2010
Vehicle: 1997 RAM1500 360 Auto 4x4
Posts: 45
Default

Quote:
Originally Posted by kejobe View Post
It's about grip, not power. If there is equal grip with both drive wheels, both are likely to spin. If you were to have one wheel on grass/dirt and the other on pavement/concrete and hit the gas, then you'll know if there's an LSD or not. Open will spin only the wheel on grass/dirt (less grip). LSD will leave a mark on the pavement/concrete also. Providing the LSD is operational.
However, if clutch pack is shot, as my truck's was at 140,000 miles, the LSD action was almost totally gone when checking by hand. On the road, the diff was only as good as an open diff.
__________________
1997 RAM1500 360 w/auto 4x4
Reply With Quote
  #16  
Old 09-27-2013, 10:39 AM
dixonmusic dixonmusic is offline
Amateur
 
Join Date: Jan 2012
Vehicle: 98 ram 1500 slt Laramie 2wd 5.2/01 Dakota Quad 3.9L 2WD
Posts: 32
Default Update

Ok, got in there again, and i DO see clutch plates behind both gear wheels, tucked in there mind, so IT is a LSD right ?

It was a elderly gent 2 owner truck, sat for 6 months, 150K on motor, have not yet got to all other fluid changes yet (trans, oil, steering) Or brakes, u joints etc.

Appeared to go through all gears ok, visual and smell test check on oil and trans fluid seemed fine, brakes are nearly gone and then 2nd day getting it back from previous owner, after i'd been driving about 20 mins stopped to pick son up with truck idling and then backing out from driveway was when i heard grinding. Got it home and immediately pulled dif cover and drained and here we are ....

So,
a) if clutch plates are shot would that explain grinding in reverse ?
b) Would old *** oil maybe without additive explain grinding ?
c) Other ?... Anyway to truly determine if dif/clutch is good ?
Reply With Quote
  #17  
Old 09-27-2013, 10:49 AM
HeyYou's Avatar
HeyYou HeyYou is offline
Section Moderator
Dodge Forum Moderator
 
Join Date: Apr 2010
Vehicle: 1996 Dodge Ram 2500
Location: Adrian, MI
Posts: 34,292
Default

I think there is a test procedure in the service manual for the LSD..... the clutch retaining clips like to break as well. Didn't find anything odd in the bottom of the diff did you? lack of friction modifier will generate some interesting sounds, but, only when turning. (direction doesn't matter.)
__________________
1996 Ram 2500 5.9 EC/SB Gas, Auto, 4x4, Hughes plenum plate, Kegger mod, double roller timing set, rest is stock. For now.....
Reply With Quote
  #18  
Old 09-27-2013, 10:50 AM
Wh1t3NuKle's Avatar
Wh1t3NuKle Wh1t3NuKle is offline
Champion
 
Join Date: Sep 2011
Vehicle: 1-Ton '00 ORE Ram 5.9L 4x4 SLT
Location: NorCal
Posts: 3,559
Default

You don't get any grinding in forward motion at any speed? How about very slow like 1-3 mph?

Since you've done visual check and nothing was blatantly obvious, I was thinking the clips that hold the clutch pack together is what is grinding. They have a tendency to break and can either get meat gratered up in there or actually stay in the pack and just smooth out the clutch face that it's in contact with.

Here are pics of mine back at just over 100K miles or so.

The fluid does need an additive to be added to the gear oil. It also has to be the proper amount, which is all stated in the Haynes manual (iirc) and for sure in the FSM (free download file in the FAQ/DIY section).

Your grinding could be something totally different too.
__________________
Wh1t3Nukle

Toyo 37s M1 3link HP60/70 ARBs 14" coilovers doubler 4:1 tcase York;4sale spacer
Reply With Quote
  #19  
Old 09-27-2013, 11:30 AM
mctdi mctdi is offline
Amateur
 
Join Date: Jan 2010
Vehicle: 1997 RAM1500 360 Auto 4x4
Posts: 45
Default

Check the brakes.
__________________
1997 RAM1500 360 w/auto 4x4
Reply With Quote
  #20  
Old 09-27-2013, 11:33 AM
mctdi mctdi is offline
Amateur
 
Join Date: Jan 2010
Vehicle: 1997 RAM1500 360 Auto 4x4
Posts: 45
Default

Quote:
Originally Posted by dixonmusic View Post
c) Other ?... Anyway to truly determine if dif/clutch is good ?

There is a torque wrench test to check the torque needed to get the clutch pack to slip between the right and left sides.
__________________
1997 RAM1500 360 w/auto 4x4
Reply With Quote
Old 09-27-2013, 11:33 AM
 
 
 
Reply




Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

Join DodgeForum
Advertising

Featured Sponsors
Vendor Directory
Our Sponsors
All times are GMT -4. The time now is 09:47 PM.

Internet Brands, Inc.


Contact Details & Emails