Ishmael - '89 HJ-61 JDM Camping Build

[60Works]

Something is off. My 60 is set up the the 80 rear and Tundra brake mod front and I have no issues with it lurching. I do have a 2F but even so if the axles are set up well I seriously doubt a 12HT has enough hp or torque to cause hard lurching.

Thanks, Godwin. I invite your scrutiny of my work. The present amount of directional lurch is more than I'm willing to deal with on a road trip Cruiser. I would hate to loose the rear disks, full float, correct width, and all the work in installing the 80 axle.

Has anyone solved the rear sway bar mismatch?

 

[cruisermatt]

From experience- it takes a LOT to rear steer a 60. Like my FJ62 currently has every rear spring bushing blown out and it doesn’t torque steer right now.

What you MAY have is an issue with your ARB being partially stuck engaged. Have jacked both wheels off the ground and made sure the differential is functioning as a a proper open differential when unlocked?
Everything looks extremely clean, I’m assuming you’ve already thoroughly inspected your chassis/bushings etc to make sure nothing is broken anywhere.

 

[BurntToast]

Thanks, Godwin. I invite your scrutiny of my work. The present amount of directional lurch is more than I'm willing to deal with on a road trip Cruiser. I would hate to loose the rear disks, full float, correct width, and all the work in installing the 80 axle.

Has anyone solved the rear sway bar mismatch?

In my thread I put in a TK1 swaybar.

Something like the locker sticking or even something loose up front in the steering feels more likely.

I realized in my build I forgot about setting the preload on the passenger side relay rod, snugged that up and my handling got way better

 

[60Works]

From experience- it takes a LOT to rear steer a 60. Like my FJ62 currently has every rear spring bushing blown out and it doesn’t torque steer right now.

What you MAY have is an issue with your ARB being partially stuck engaged. Have jacked both wheels off the ground and made sure the differential is functioning as a a proper open differential when unlocked?
Everything looks extremely clean, I’m assuming you’ve already thoroughly inspected your chassis/bushings etc to make sure nothing is broken anywhere.

Checked that the ARB is unlocked. Everything is new and tight; springs, bags, bushings, brakes, gears, locker, bearings...

Could one uninflated airbag contribute to the lurch? The right has a slow leak in the fill line.

The spring perches might have the pinion at a slightly different angle than the transfer case output. I've seen significantly more difference on SOA rigs. No driveshaft vibration.

The truck did not lurch prior to the axle swap. I had been running the front axle brake mod for several hundred miles without issues before changing the rear axle.