View Single Post
Old 04-05-2017, 04:20 PM   #54
Norm Peterson
corner barstool sitter
 
Norm Peterson's Avatar
 
Drives: 08 Mustang GT, 19 WRX
Join Date: Jul 2012
Location: Eastern Time Zone
Posts: 6,990
Quote:
Originally Posted by Smashn808 View Post
Can you safely jack under the rear control arm? Directly under the spring area? Not sure why mine has plastic covers over it though.
If you absolutely must jack by the control arm, do so outboard of the spring area as close to the upright as possible. Jacking at the spring area (anywhere inboard of the upright, actually) will involve the control arm rotating downward rather than remaining at the same inclination as it is when the car is resting on its wheels. Remember that a 1000 lb corner weight puts considerably more than that at the spring, so when the spring is directly supporting only the 1000 lbs that it will extend. And generate side loads on the jack pad.

An uneasy not-guaranteed-stable situation from my point of view.


Norm
__________________
'08 GT coupe 5M (the occasional track toy)
'19 WRX 6M (the family sedan . . . seriously)
Norm Peterson is offline   Reply With Quote