Jack Stand Cribbing

[berger]

At some point I want to tackle my diff seals and I want to ensure the truck is properly supported, as it may sit like that for a while. I discovered that many guys use a cribbing of either 12" pieces of 2x4 or 4x4, screwed together, and the stands on top. What do you guys think?

This is a rough example. I would make a solid top platform...and it would be screwed together with deck screws.

cribbing.jpg (64.15 KiB) Viewed 3470 times

[TechMOGogy]

I think your on the right track
4x4's with solid 2x tops but I would lag everything together for better shear strength.
I would also make the bottom solid so it is stable in all directions

[VinceAtReal4x4s]

4x4 cribbing is the standard support used for fire and rescue operations and is approved by pretty much all agencies. I have used it to prop up overturned 18-wheelers before and one time, a train car! I have never seen a need to bind or screw the wood together. The bad thing I see in that pic is the use of the jack stands on top of the cribbing, which is unstable. I'd just use the cribbing all the way up. We always had some 2x4's and wedges to fill in gaps. Just cut some 4x4's in half, at a 45 degree angle, and you have two perfect wedges out of one piece.

There are also huge jack stands made that would work alone. I used to have a few. I think they are "6 or 8 ton" models.

[4x4Pinz]

I just use the large jack stands. Much less chance of something going wrong. I made four body tub supports for when the running gear has to come out or when I want to stabilize the truck when working on it. a 3" square tube with a pipe welded to the top plate that the threaded rod drops down into. The rod had a bearing plate that can be screwed onto it. I chose to screw it on rather then weld it in the event I would like a different attachment. These stands allow adjustment of body height and add support.

[TechMOGogy]

Those look really tall?
What height do you need if doing diff's etc?

[4x4Pinz]

I use 6 ton jack stands placed under the central tube or differential and the body jacks to stabilize, I do not lift with the body jacks.

[TechMOGogy]

At some point I want to tackle my diff seals and I want to ensure the truck is properly supported, as it may sit like that for a while. I discovered that many guys use a cribbing of either 12" pieces of 2x4 or 4x4, screwed together, and the stands on top. What do you guys think?

This is a rough example. I would make a solid top platform...and it would be screwed together with deck screws.

cribbing.jpg

For Canadians: Crappy Tire has jack stands on sale this week 40% off - that is why I was asking about height.
I am going to go pickup the 6 ton stands tonight (Sale price $35.99)
http://www.canadiantire.ca/AST/browse/4 ... ?locale=en

[berger]

At some point I want to tackle my diff seals and I want to ensure the truck is properly supported, as it may sit like that for a while. I discovered that many guys use a cribbing of either 12" pieces of 2x4 or 4x4, screwed together, and the stands on top. What do you guys think?

This is a rough example. I would make a solid top platform...and it would be screwed together with deck screws.

cribbing.jpg

For Canadians: Crappy Tire has jack stands on sale this week 40% off - that is why I was asking about height.
I am going to go pickup the 6 ton stands tonight (Sale price $35.99)
http://www.canadiantire.ca/AST/browse/4 ... ?locale=en

I don't believe they are tall enough. They were/are cheaper at Princess Auto for quality 6 ton stands (which I have). This is why I like the cribs.

[David Dunn]

Jack stands?, Heck, I'd just use a forklift .... but not like they did on my Flying Dump Truck

[stiffler4444]

I just have mine on some heavy ass jacks as in the pics. Very stable.

[TechMOGogy]

Can you (or anyone) post the height of stands required to lift tires a couple inches off the ground (like in picture stiffler4444 posted)?
(I know it depends on tire size but looking for a general number here so I can take advantage of a jack stand sale on this week and I see that stiffler has wood under stands and some wood on top of of stands)
I would go measure under my Pinz but it is 3000 miles away currently
Thanks!

[stiffler4444]

Hey there,

I can measure up the pictured stands today. They are much heavier than the Crappy tire ones, but I've only got them about half extended, so the 6 ton you are looking at might work. Stay tuned.....
P.S. I only used wood top and bottom for protection of my driveway and the pinz mount locations.
tx Dave

[stiffler4444]

Ok, so the stands I am using are 8 ton capacity and stand 24" when fully extended. As you can see, I have mine out only 4 "teeth", and when fully extended they have 10 "teeth" visible. I figure your 6 ton variant might work out.

tx Dave

[TechMOGogy]

ok so yours are 24" with 10 teeth showing (and I figure an 1" per tooth)
So with 4 teeth showing they were 18" + the wood
Thanks!!
Dan

[stiffler4444]

Ya, that sounds about right. They're a bit of overkill so the ones you are looking at should serve the purpose.

tx Dave