Dodge Durango Forum banner
Cancel
Create thread New Garage Forums

Question re. 12 bolt LPW Differential cover - Fluid Capacity

Jump to Latest
1 - 19 of 19 Posts

greg

· Registered
Joined
·
2,567 Posts
Discussion starter · #1 ·
Install was relatively quick other than having to lower the spare to get at the two top bolts. Torquing was a wee PITA but nothing to write home about. However what I do have a question about (and I did send an e-mail to LPW about is the following.)

The stock set-up says 4.9 pints for the 9.25 rear axle. LPW's Ultimate 12 specifies 2.75 quarts and fill until bottom of fill plug. Well I'm up to 3.3 quarts and I'm still nowhere near the fill plug. And no, it ain't leaking out of the case!

So, for those of you with an LPW, can you please enlighten me as I don't want to overfill the sucker.

Did a short test drive, no leaks - other than my driveway when emptying/filling :oops:

TIA

greg
 
#2 ·
Diff capacity

Sorry I can't help, Greg. I had my dealer install the cover as I can't wrench anymore. I can't find the repair order that they did it on for the capacity.
 
Save
Reply Quote Like Like
#4 ·
looks great Greg,

good to see I'm not the only one running that sweet looking cover!!

aloha my friend,
g
 
Save
Reply Quote Like Like
Discussion starter · #5 ·
I just got a call from Grant (thanx pal I really appreciate it) who it seems did the same thing I did. Tried to fill it to the fill hole :naughty:

You need to just put in the 2.75 quarts and the fill hole I'm assuming the instructions refer to is the original fill hole. They should have just left that part out of the instructions as it just confuses everything. The new cover is nothing like the old OEM and as such you have no way of knowing where the old fill hole was in respect to what's installed.

Soooooo I'll just drain it all and measure accordingly again. Again thanx Grant for the phone call! :clap:

greg
 
Discussion starter · #8 ·
Here's LPW's reply as promised:

The Ultimate cover fill plug isn't the correct level, it's raised for easy filling. Stay with the 4.9 pints or 2.75 quarts (5.5 pints) max. Our cover is a little deeper and can hold the extra 1/2 pint. Thanks,LPW.
Click to expand...
I drained everything and started anew pouring in the required amount. The instructions refer thus to the OEM fill plug which is meaningless as you have neither frame of reference or anything to see what that was.

Kevin, pressure for bearing cap load bolts is 10ft/lbs maximum and mounting bolts are 30ft/lbs for the 3/8" bolts.

greg
 
#10 ·
Rear diff fluid level should be just above the bottom of the axle tubes. According to my FSM, the bearing cap bolts should be 100 ft-lbs.
 
Save
Reply Quote Like Like
Discussion starter · #11 ·
No way to see that with the LPW cover. As to the bearing cap load bolts according to the LPW instructions they're to be torqued to 10ft/lbs maximum as distortion will occur.

greg
 
#12 ·
diff covers

The torque difference is the torque on the bolts that put pressure on the bearing caps from the diff cover, not the bearing cap bolts themselves. These exrternal bolts just add stability to the bearing cap structure and have nothing to do with the holddown torque inside the differential at all.
 
Save
Reply Quote Like Like
#14 ·
As I have been lurking and watching, I was interested in the ft lbs bolt torque specs. I found that 120 inch pounds was the max I could get the bolts on my Purple Cranium cover (and I assume 120 inches = 10 ft lbs whereas 12 inches in a foot, right?!) Anything more than that and something certainly felt like it (the bolt) was gonna snap.

IndyD
 
#16 ·
Re: diff covers

MWeed said:
The torque difference is the torque on the bolts that put pressure on the bearing caps from the diff cover, not the bearing cap bolts themselves. These exrternal bolts just add stability to the bearing cap structure and have nothing to do with the holddown torque inside the differential at all.
Click to expand...
ahhhh, now I see. :)
 
Save
Reply Quote Like Like
#18 ·
The differential cover's bolts simply bolt down and apply additional thrust force onto the bearing caps holding the gearset in place. It provides additional strength to the bearing caps to prevent an explosion during drag racing.

So I guess that no there isn't friction, but force?
 
Save
Reply Quote Like Like
1 - 19 of 19 Posts
About this Discussion
18 Replies
8 Participants
Last post:
Kevin_Rants
Dodge Durango Forum
posts
509K
members
60K
Since
2004
Welcome to the best Dodge Durango Forum around, where you can find a great Dodge Durango Wiki and discuss the reliability of the different trim levels including the GT and SRT!
Full Forum Listing
Explore Our Forums
Durango Discussions 2014+ Durango Discussions 1998-03 Durango Discussions Dodge Durango 2018+ SRT and Hellcat Durango Purchasing