Rear control arms
- Thread starter Matt
- Start date
Sparky
Member
- Dec 4, 2011
- 12,927
Lowers are the main arms, I wouldnt drive woth one of those broken. Bit they are tubular and unlikely to break. Uppers keep the axle from wrapping. My experience was the right being broken was worse than left rear, as under acceleration it wanted to wrap and cause it to push the vehicle at an angle (dig to the right) instead of accelerate straight. Left broken isn't as noticeable, but moderate braking just felt weird like a shimmy.
Sparky
Member
- Dec 4, 2011
- 12,927
Check your other one before you drive too much. With one broken, the other is going to get stressed a bit more. If BOTH broke, you could be in a heck of a lot of trouble because now the axle could rotate any which way it wanted down there, which could result in some catastrophic U joint failure, which could result in drive shaft mayhem.
HARDTRAILZ
Moderator
- Nov 18, 2011
- 49,665
Sparky
Member
- Dec 4, 2011
- 12,927
Yours was a lower that was bent though wasn't it? I wouldn't want to go anywhere with that.
Ideally, I wouldn't drive with any bent/broken, but... I did when I didn't know it was broken on the driver's side. Passenger side bent when hitting something in the road that blew my alignment out and busted the rear arm (it was likely already weakened as it was). That was fun.
Ideally, I wouldn't drive with any bent/broken, but... I did when I didn't know it was broken on the driver's side. Passenger side bent when hitting something in the road that blew my alignment out and busted the rear arm (it was likely already weakened as it was). That was fun.
HARDTRAILZ
Moderator
- Nov 18, 2011
- 49,665
- Dec 2, 2011
- 4,023
Blckshdw
Moderator
@Matt ...to answer the Original Questions you posed in Post #1 more precisely...
(1) The Lower Control Arms (LCAs) Maintain the Right Angle Geometry of the Rear Wheelbase in its relation to the Drive Shaft's Axis of Rotation... AND ...in concert with the Rear Springs and Shock Absorbers ... they prevent "Wheel Hop" from occurring on either side of the Rear Wheels... as one tries to "get ahead" of the other.
(2) The Upper Control Arms (UCAs) Prevent the Differential and Axle Tubing from any Dangerous Rotations...Neither Fore Nor Aft and when Adjustable... the UCAs allow for attaining a much more precise Angle of Attack for relieving the stress on the Rotating Drive Shaft versus its alignment with the Rear U-Joint.
(1) The Lower Control Arms (LCAs) Maintain the Right Angle Geometry of the Rear Wheelbase in its relation to the Drive Shaft's Axis of Rotation... AND ...in concert with the Rear Springs and Shock Absorbers ... they prevent "Wheel Hop" from occurring on either side of the Rear Wheels... as one tries to "get ahead" of the other.
(2) The Upper Control Arms (UCAs) Prevent the Differential and Axle Tubing from any Dangerous Rotations...Neither Fore Nor Aft and when Adjustable... the UCAs allow for attaining a much more precise Angle of Attack for relieving the stress on the Rotating Drive Shaft versus its alignment with the Rear U-Joint.
Last edited:
- Dec 2, 2011
- 4,023
So far so good...3 more days to hold together! 
The bad pump and fan clutch are just burning up the fuel. Filled up on Saturday morning and made a 50 round mile trip, 100 round mile trip and just general running around and I'm down to a 1/4 tank...but I want it near empty when I drop it on Friday.
The bad pump and fan clutch are just burning up the fuel. Filled up on Saturday morning and made a 50 round mile trip, 100 round mile trip and just general running around and I'm down to a 1/4 tank...but I want it near empty when I drop it on Friday.
This sounds like a job for ... The Gas-Tapper......then you could pump the gas tank down into the gas tank of one of your other vehicles:
Post #1
https://gmtnation.com/forums/threads/de-fueling-no-fooling.17840/
Post #1
https://gmtnation.com/forums/threads/de-fueling-no-fooling.17840/