CSX4XXX IRS Answers needed!

[Johnnyquest]

I acquired a CSX4000 series and checking out the car and took it out for a quick spin and under acceleration the rear wanders or darts around. I did a quick search and read some about bushings and what not.

Surely its the IRS out of whack, what should I look for. Under coasting it tracked fine.

Thanks, Randy

[jhv48]

If the car has Sumitomo tires. Get better tires!

[mickmate]

I would check 4 wheel alignment first. That includes a good wrench on the wheels especially forward and back to see if the alignment is changing.

[Johnnyquest]

How about some alignment specs I have seen two and they are different.

Thanks!

[mickmate]

The specs that work.
427 Chassis Alignment Specs
The place for 4000 info.
csxinfo.net - csxinfo Forum

[Johnnyquest]

Awesome, Thanks!

Randy

[menace1]

If it's that squirrly, better check the rear axle nuts. One or both sides may have come loose. These are usually torqued to 250-270 lbs.

Glenn

[bret a ewing]

Originally Posted by menace1

If it's that squirrly, better check the rear axle nuts. One or both sides may have come loose. These are usually torqued to 250-270 lbs.

Glenn

...............the Jesus nut.