Crib question

[Mad4slalom]

Evening all. Having built a set of wheel cribs 18 months ago but never tried them out. I am curious as to the best or safest way to jack the corvette high enough to get them under the wheels. do folk on here jack one corner at a time ? , or Front two then rear two or one side (2 Wheels then the other side 2 Wheels. Little concerned about jacking under front crossmember or rear dif.
Any experiences and suggestions welcome .
TiA

 

[Corvette]

The diff is fine as jacking point, for the front I use A-arms as jacking point. Once you start jacking one side the whole front comes up. You will need to keep chocking wheels until you get wheels high enough for cribs to fit under tyres, this will involve more and more wood under Jack. don’t lift on crossmember unless you have a thick piece of wood placed front to back of crossmember as they easily dent if lifted from centre.
I used to raise mine onto 20” tracking tables which was quite a height for the Jack and involved lots of blocks of wood under Jack.
I now swear by my air Jack. It’s light to move around and takes maybe 3 seconds to reach full height. About to buy another so have a matching pair, they are only £65, these are also easier to put wood blocks underneath.

 

[Mad4slalom]

The diff is fine as jacking point, for the front I use A-arms as jacking point. Once you start jacking one side the whole front comes up. You will need to keep chocking wheels until you get wheels high enough for cribs to fit under tyres, this will involve more and more wood under Jack. don’t lift on crossmember unless you have a thick piece of wood placed front to back of crossmember as they easily dent if lifted from centre.
I used to raise mine onto 20” tracking tables which was quite a height for the Jack and involved lots of blocks of wood under Jack.
I now swear by my air Jack. It’s light to move around and takes maybe 3 seconds to reach full height. About to buy another so have a matching pair, they are only £65, these are also easier to put wood blocks underneath.

Thanks corvette , I can see there is minor distortion from previous jacking on crossmember. I did see those bolt on parts for jacking and towing from crossmember but i think the guy in the states stopped producing and wouldnt ship due to the weight. I have my single post lift so can raise and then lower onto cribs, I just thought if I change my shifter using cribs instead of lift I can access under neath and in cabin easier and also do it in the vette room over a few days in comfort rather than leaving it on the lift in the main shed.

 

[Mr. Cricket]

I did see those bolt on parts for jacking and towing from crossmember but i think the guy in the states stopped producing and wouldnt ship due to the weight.

David Howard (AllC34Me) He stopped making them when he died suddenly! I gave him a date correct jack for one of his C3 projects as a payback for being the most generous Corvette owner there ever was. Gave away tons of Corvette stuff.


I bought that jack after my LT-1 arrived from the States and was missing the jack and lug wrench only it wasn't... I didn't know of the storage bin liner and found it by accident and there they were

 

[Forrest Gump]

There’s other previous threads on this forum about where you should and shouldn’t Jack up a C3.
eg…. Jacking question
There are different opinions but most say jack under the chassis side rails.
I prefer to jack up under the diff and the front crossmember, and always using my “special” blocks of wood. The block for the diff locates flat onto the spring clamp plate, ie between the bolt heads. There are tales of breaking the ears off the diff carrier - Maybe that’s possible if you were to put the jack under the bolt heads. My block for the front is curved exactly as the crossmember and also has tabs that stop it sliding forwards or backward. Never had a problem with this method and my car has been up and down a fair few times!

 

[Corvette]

To change shifter and linkage I would just Jack up car on drivers side chassis side rail and go to work. Nice single post lift there, you have room!

you could saw those cribs in half as they are v wide.