Welcome to Just Commodores, a site specifically designed for all people who share the same passion as yourself.

New Posts Contact us

Just Commodores Forum Community

It takes just a moment to join our fantastic community

Register

Safety jacking up your car - NEVER JACK THE REAR WHILE FRONTS ON A RAMP

3onTree

Donating Member
Joined
Jul 5, 2010
Messages
87
Reaction score
11
Points
8
Location
Melbourne
Members Ride
SSV Redline Sportswagon
Car is lowered so to use the trolley jack up front , low profile ramps are needed to get the jack under the car.

Finished the service then lowered the car front wheels on the ramps intending to drive off the ramps next.

Needed to check another issue on the rear of the car, so thought nothing of putting the trolley jack under the rear diff to raise the rear and get axle stands under the rear stand points - front wheels still on the ramp.

As the rear rises, it pulls the front wheels back and it caused the car to roll off the ramp with the rear wheels in the air - so the car is rolling on the trolley jack wheels at the rear (despite hand brake being on, obviously)

Thankfully I wasn’t under it at the time, but a pretty weird experience - i had the hand brake on & in gear and was baffled why the car was rolling on a level garage floor.

Safety first, one of those things. I am normally very conscious of always putting the car on high quality stands and never getting under a car while on the jack. Had it rolled later while on the stands it would have rolled off the stands and caused an accident.

So lesson is never jack the opposite side of the car while one side is on ramps. Only jack the car on a level surface or jack the side where the ramps are. Might be obvious to others, but sometimes we just don’t see the danger and make bad decisions - nearly earning a Darwin award.
 

Attachments

Last edited:

Gavkat09

Member
Joined
Feb 5, 2019
Messages
45
Reaction score
2
Points
8
Age
37
Location
Narellan
Members Ride
Vy sv8
i had this where i jacked the front up and put it on jack stands. when to the rear to jack it up so i could get under the whole car and it started rolling backwards.
 

vc commodore

Well-Known Member
Joined
Jun 18, 2014
Messages
5,885
Reaction score
2,708
Points
113
Location
south australia
Members Ride
vc commodore
Glad you didn't get hurt, but having the handbrake on and in gear doesn't do much, when the back wheels get lifted off the ground
 

dgp

Well-Known Member
Joined
Jan 1, 2011
Messages
1,458
Reaction score
549
Points
113
Location
Victoria
Members Ride
VF II SSV Redline
This is why your trolley jack has wheels, so it can roll forward as you jack up the rear.
I always jack up the front, place on stands, then jack up the rear and place on stands. Jack rolls forward to compensate.
 

3onTree

Donating Member
Joined
Jul 5, 2010
Messages
87
Reaction score
11
Points
8
Location
Melbourne
Members Ride
SSV Redline Sportswagon
Yes , normally as you lift one end of the car, the trolley jack wheels allow the jack to maintain a vertical position under point load. I didn’t account for the movement of the front wheels instead of the trolley jack on its wheels (which roll very well so no unusual resistance). Then the front wheels rolled onto the angled ramp section and off the flat resting pad, where the car started rolling down the ramp. Just need to think and never rush these things. I was hoping to point out to readers to never jack the car when one end is on ramps. The car will move and then roll off the ramp. Just one of those things I neglected in my haste, but was lucky.
 

3onTree

Donating Member
Joined
Jul 5, 2010
Messages
87
Reaction score
11
Points
8
Location
Melbourne
Members Ride
SSV Redline Sportswagon
That might be due to trolley jack wheels and surface not allowing the jack to roll and maintain vertical position under the lift point. If the jack cannot roll under the lift point it will pull the car back and if the jack stands are raised high, the car can roll off the stands. Never get under the car unless those axle stands are sitting nicely on all 4 corners.
 

3onTree

Donating Member
Joined
Jul 5, 2010
Messages
87
Reaction score
11
Points
8
Location
Melbourne
Members Ride
SSV Redline Sportswagon
Glad you didn't get hurt, but having the handbrake on and in gear doesn't do much, when the back wheels get lifted off the ground
Thanks mate. Yeah I know, but at the time, i was rushing, and nothing good comes of rushing.
 

07GTS

Well-Known Member
Joined
Sep 8, 2013
Messages
2,712
Reaction score
1,167
Points
113
Location
Australia
Members Ride
VEGTS BLOWN E85
i have to do the same got those ramps to get the front up enought to get a jack under it, then i always put the front on stands then lift up back and on stands, if i only lift the back the front i put block under front and back of wheel to stop it rolling either way, or if only front up use handbrake, if i ever think it moves after getting on stands ill lift the first end i put stands on again and back onto stands so it releaves any stress forward/back on the stand if there was any, also before u go under just push car once its up if it dosnt budge ur good but if u feel some movements or noises check it out first
 

krusing

Well-Known Member
Joined
Jun 21, 2014
Messages
2,953
Reaction score
1,447
Points
113
Location
Melbourne Bayside 3193
Members Ride
2002 VY L67 Calais Sedan, 2012 VE L77 Calais Wagon
Yes , normally as you lift one end of the car, the trolley jack wheels allow the jack to maintain a vertical position under point load. I didn’t account for the movement of the front wheels instead of the trolley jack on its wheels (which roll very well so no unusual resistance). Then the front wheels rolled onto the angled ramp section and off the flat resting pad, where the car started rolling down the ramp. Just need to think and never rush these things. I was hoping to point out to readers to never jack the car when one end is on ramps. The car will move and then roll off the ramp. Just one of those things I neglected in my haste, but was lucky.
I did just the same early in the year twice to replace my Fuel Pump, "yes twice", as the after market one was not compatible, so ended up installing a Genuine One.
In my case I had the back wheels on the ramps, and had the front on stands,
Being my ramps are made of right angle steel, I made up some timber wheel chocks out of blocks of timber that sit in the top of the ramp vertically in front of the back wheels, so they can not roll forward,
mainly because I had to drop the front of the K- Frame, and loosen the back of the K-Frame halfway so t he take would drop out, more details of how it was done in a previous thread.

Because I had to remove the tail shaft and other hardware, and also release the hand brake cable, there was nothing to secure the back wheels on the ramps, and nothing to stop it from rolling forward.
 

commy vk

Active Member
Joined
Oct 20, 2009
Messages
519
Reaction score
82
Points
28
Location
South Australia
Members Ride
commodore ve
This reminds me when years ago I jacked up the car so high with jacks ramps and blocks of wood
then all of a sudden the whole car went sideways and almost went through next doors fence.
 
Top