The "Thou Shalt Not Jack a Sprinter Differential" Myth
Almost anyone who followed my "Thou Shalt Not jack the differential" thread hijack over at Yahoo Sprintervan should have seen this coming.
First let me say that this is in no way intended to suggest that people can just jack up their vehicles willy-nilly. It is also not intended as an instruction on proper jacking. Anytime
you jack up any vehicle
you need to be certain
you understand what is involved to safely raise and stabilize your vehicle. This can include, but is not limited to, such things as choosing a suitable level surface, blocking the wheels, choosing a proper jack, using jack stands so as to not rely on your hydraulic jack components to hold a vehicle up and other standard industry practices.
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March 2022 Jacking comment from another thread.
I should slow down on questioning claims that may not be true?
The Sprinter axle tubes being special reminds me of the
"Thou Shalt Not Jack a Sprinter Differential" myth.
Post #75
..
The logic is that the Sprinter conventional differential and rear suspension must be special because it is a Sprinter. Don't jack against the differential because the Sprinter design is weak compared to other truck and van conventional rear drive differential systems.
The problem is that many, many technicians and owners have not visited Sprinter-source and other forums to learn the gospel of proper lifting. The owners haven't been taught to run out screaming at the mechanic to stop lifting against the differential case. I use the T1N differential to lift Sprinters as many others do. No problems to date. After the rear of the Sprinter is lifted using the differential, I position the safety jack stands under the axle tubes. Just the same as on other trucks.
Since 2010 I have been requesting examples of damaged axle tubes or differential cases that resulted from a Sprinter being lifted using the differential case. Not one documented example has been put forward. There are many Sprinters around the world that are lifted against the differential using a floor jack. There should be examples jumping out in the internet documenting the Sprinter different design rear drive weak axle tubes systems failing.
There is a danger of the somewhat proud pressed steel differential cover getting damaged if the floor jack cup isn't properly positioned or padded. That isn't a mechanical failure of the tubes or the differential case.
I have no specific data as to the axle tube design so believe what you wish. And anyone possessing information please provide the documentation showing the many damaged
axle tubes caused by a Sprinter being raised using the differential case for lifting.
vic
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Added:
This information should apply to a T1N or NCV3 Sprinter.
I've been lifting my Sprinters using this method since purchasing the 2004 in 2008. No problems to date. An owner should evaluate my methods before applying them. First let me say that this is in no way intended to suggest that people can just jack up their vehicles willy-nilly. It is also not...
sprinter-source.com
Back to the original thread... Short Version:
After doing some questioning and a bit of searching I see no reason why a Sprinter can't be lifted using a
rolling floor jack under the differential housing (pumpkin). (I do recommend padding the lift cup.) I strongly believe that the entire "Thou Shalt Not" jack the Sprinter differential came from erroneously applying the operating manual instructions to all jacking ever. Those instructions were intended specifically for the
OEM single point tire change bottle jack provided as standard equipment.
2004 operating manual caution Section 6, Pg 293.
"
CAUTION!
Do not position the
[OEM tire change] jack at the leaf spring or the
differential housing."
I think the main reason the "Caution" about the jacking on the differential is in the operator's manual is because if you jack on any vehicle with any type single point bottle jack, the pivot rotation as the vehicle rises causes the jack to angle and the jack can kick out. This is very evident if you watch the roll around floor jack wheels as you lift a differential. As the vehicle raises the jack rolls and compensates for the change in position. Much of the movement is related to the scissors action of the floor jack, but some is because the differential is pivoting in an arc from the front wheels.
The operator manual caution was not intended to indicate that the structure of the differential housing was sub-standard to others in the industry. There is no reason that you cannot lift a Sprinter with a
rolling floor jack any more than any other vehicle. I'm convinced that the "Thou Shalt Not jack the differential ever" is a misinterpretation of the intent of the operators manual.
20100422 Edit: I will add that if the caution about the differential housing was important why isn't it repeated verbatim in the service manuals?
If anyone would like to debate my conclusions please start a thread such as "Vic is full of it... again" or something similar. I will gladly post that link here for people to access.
Do with my opinion what you will.... vic
A pricey floor jack that will reach the unibody frame rails. I would probably use a plywood pad with the jack.
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Less expensive, but appears lighter duty.
Something to be aware of with clearance on the differential cover.
I have been working on cars for over 40 years, I have lifted cars from the diff hundreds of times. I have 3 floor jacks and 2-6' high rolling cabinets of mechanics tools. It has never happened before [damage to cover/leaking], except for this time [2011 NCV3] and I wanted to find out why. I did find out, and if I can prevent it from happening to someone else that would be great.
...
Good information to have. Do you think a lobe on the jack cup was involved?
vic
Added: The question was never answered. I suspect that a lobe or high part of the floor jack lift cup was involved in bending the differential cover.
March 2018.
Again.
Yes Sprinters are damaged by people using incorrect jacking methods.
Shock mounts are damaged, body metal gets damaged, front structures get bent/metal tearing by not using blocking, differential covers get bent to the point of leaking because proper pads aren't used, etc., etc. All that stuff happens because the correct locations are not selected and proper methods aren't applied.
I have yet to see any documentation where jacking a Sprinter up using a properly padded floor jack cup against the differential case has caused axle tube failures. Please provide the data if you have it.
Back in 2010 I searched for any documented axle tube failures related to jacking the differential case. I found none. I have been asking for some documented axle tube/differential failures since 2010. I have yet to have anyone produce any data. ...
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A screengrab from a hoist lifting video.
...
The takeaway from your second screen grab should be that if using a floor jack with padded cup, the frame rails are perfectly fine to jack against to lift a Sprinter... not to imply that there aren't many other industry standard safe choices too.
To repeat.
Mercedes has a very specific list for where NOT TO jack a Sprinter when using a
floor jack. Of course that list isn't all inclusive. They specify not jacking against axle tubes. If the differential case is a problem wouldn't it make sense for them to include that along with the axle tube comment? It is all the same assembly.
Jack as you wish. Carry on.
vic
As always the original post/thread can be accessed by clicking the blue arrow within any quote box.
A recent post:
https://sprinter-source.com/forums/showthread.php?p=149575#post149575
My first post heading down this road started over at Yahoo Sprintervan. Here is the link.
Re: sprinter lift location points
http://autos.groups.yahoo.com/group/sprintervan/message/55749
This is my initial hijack comment at Sprintervan.
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A question about jacking the rear end of a Sprinter.
I posted this below.
"I know this is heresy, but I jack the back end of my 2004 2500
up with a floor jack by using the pumpkin all the time. I use a piece of 5/8"
plywood cushion between the jack cup and the bottom of the differential case."
I've heard many times that you can't jack up a Sprinter by using the rear end
housing (pumpkin). I searched through my 2004 manual and found this caution in Section 6, Page 293.
"
CAUTION!
Do not position the [tire change] jack at the leaf spring or the
differential housing."
That is in the section pertaining to using the OEM supplied tire changing jack. I understand completely that using the single point OEM hydraulic bottle style jack anywhere but in the designed locations is dangerous.
I then read/searched my Sprinter Service Manual CD for any warnings against jacking the differential housing. I didn't find anyplace where they specifically warned against that.
My questions:
Where does it specify not to raise the rear of a Sprinter up using a roll around floor jack under the differential housing (pumpkin)? Have people mistakenly transferred the cautions about using a OEM bottle jack under the differential housing into an erroneous "Thou Shalt Not" rule? Until someone supplies references otherwise, I'm thinkin' that's what has happened. vic
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This is my conclusion.
Some of the posts leading up to why I arrived there can be found lower down.
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I did some searching.
I did a Google search using "differential damage jack lift". No hits of damage.
I used "differential crack lift jack", no damage posts screaming at me.
I used "differential jack lift bent tubes" and got some negative comments from Sprinter posts, but no damage. (Were the negative comments Sprinter "Thou Shalt Not" inspired and not based upon fact??? I think so.)
Some select comments from my searches are included lower in this post if you're interested.
My conclusion is that if lifting vehicles by using the differential housing was causing damage the searches I used would have had hits describing jack damage screaming out at me. The only actual damage comment I found was about a differential that had an oil cooling line damaged.
I think the OEM operators manual OEM jack cautions are being applied incorrectly to using a
rolling floor jack with a slightly padded cup. You may actually be putting yourself in more danger screwing around lifting one side at a time. Do with my opinion what you will.... vic
Searched "differential damage jack lift", select comments:
http://forums.bimmerforums.com/forum/archive/index.php/t-536630.html
so what's the consensus about jacking a car up at the differential? seems to be about 50/50 from the searches. i ran across this pelican part technical page about jacking an e36 and they say:
http://www.pelicanparts.com/BMW/techarticles/E36-Jacking_Up/E36-Jacking_Up.htm
http://www.pelicanparts.com/BMW/techarticles/E36-Jacking_Up/pic10.jpg
" If you would like to raise just the rear of the car, there are a few methods that you can use. The most common one is to lift the entire car by the bottom of the rear differential. This will not damage the differential as it is very strong at this point...."
http://www.peachparts.com/shopforum/showthread.php?t=142483&page=2
"SORRY GUYS I DONT KNOW WHAT YOU DO FOR WORK, but it is safe to lift a car by the differential, unless it is a car that has a diff cooler on it.Then you shouldn't,.cause it will damage it if you are not careful.
Yes i know i am talking against our Moderator but sorry to say, but it is just fine to lift it on the diff. Hey we get icbc cars in all the time with no wheels, so where are u going to put the jack? All diffs are connected to the subframe, which is bushinged to the body. And yes the diff has 3 bolts, but they are big enough to take the weight......Ok if you have aluminum diffs, they willl still take the weight, unless as i said do not do it with the diff coolers like on the AMG's - MeanGreen"
"Well, the pdf file makes it perfectly clear that
MB recommends lifting from the differential. (Underline is mine. -vic) But common sense tells me not to. (Really???? Sarcasm is mine - vic) The differential is not designed to carry the weight of the car -- it's designed to withstand torsional twisting.
Even if Wilhelm Maybach speaks to me from the grave -- telling me it's OK -- I'm still not going to jack my 201 from the differential.
Wilhelm Maybach
http://www.nndb.com/people/344/000174819/
But, hey... that's just me. [Yep. Don't get confused by the facts. - vic]
Jeff Pierce"
Searched "differential crack lift jack" no hits worth mentioning.
Searched "differential jack lift bent tubes", select comments:
https://sprinter-source.com/forums/archive/index.php/t-1325.html
A 2007 discussion.
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talkinghorse43
06-27-2007, 08:06 PM
Rear axle is okay (on the axle tube near the spring mounts), just not under the Differential Housing (or pumpkin). ("Thou Shalt Not" applied again?? - vic)
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Here's from the '03 service manual.
FLOOR JACK
When properly positioned, a floor jack can be used
to lift a vehicle. Support the vehicle in the raised
position with jack stands at the front and rear ends
of the frame rails.
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vic edit: If you think they are telling you to only use the floor jack on the "front and rear ends of the frame rails" re-read the statement or we may then be on our way to another "Thou Shall" misinterpretation. They say "
jack stands at the front and rear ends". If they are telling you to place the jack stands in those frame rail positions that means the floor jack needed to be positioned somewhere else to raise the vehicle so the jack stands could be installed in those positions. I'm thinkin' the differential would be a perfect place to raise the rear with a floor jack for this. You can't place the jack stands under the frame rails if the floor jack is already there in the way.
*
CAUTION: Do not lift vehicle with a floor jack positioned
under:
An axle tube.
A body side sill.
A steering linkage component.
A drive shaft.
The engine or transmission oil pan.
The fuel tank.
A front suspension arm.
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Note that the differential housing is not listed in the above MB list. If the differential was officially excluded, rather than Axle Tubes wouldn't the list specify "Differential Assembly"? - vic
Here is a T1N document thanks to autostaretx.
View attachment JackPointsT1N.pdf
20101103 edit:
Here is a NCV3 document thanks to JD Caples.
View attachment NAFTA-NCV3-Chrysler-Service-Info-Hoisting-Points.pdf