Death Wobble - choices |
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DonH
Member Joined: 13 Feb. 2006 Location: Central Massachusetts USA Status: Offline Points: 132 |
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On my jeep the wobble was was caused by not having the specified pre-load on the knuckle which is a lot tighter than you would think. Use new shims and a scale to set the pre-load to specs, expect to remove the caps several times until you get the right shim combination. Make sure to toe is set correctly and the wheels are balanced. With regard to wandering we have to lower our expectations. One inch of free play at the steering wheel is remarkably tight. Back in the day state inspections allowed for several inches depending on the diameter of the steering wheel. The bell crank shaft must be tight in its socket and the bell crank must be tight on the shaft requiring force to move it. The steering linkage ball joints should be tight and the steering gear box should be adjusted with the steering wheel straight. The drag link ends should be tight enough to have no free play but not so tight as to not move easily. Having done that you will have to pay more attention to steering than we are used to. DonH
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1946CJ2A
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bigdaddy13
Member Joined: 11 Oct. 2016 Location: socal Status: Offline Points: 213 |
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My dad, who is an excellent mechanic, used a couple guides (Moses ludel) and one other to check his method and torque figures while repacking and preloading them. Pretty confident, having seen them myself, that I can exclude those for now. Thanks for the info on the kingpin bearings, I'll do that check next. |
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bigdaddy13
Member Joined: 11 Oct. 2016 Location: socal Status: Offline Points: 213 |
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Got it. thanks for the perspective. |
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Stev
Member Sponsor Member Joined: 27 July 2016 Location: Cincinnati Status: Offline Points: 2384 |
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Death Wobble -
Lots of good ideas in this thread. What I have done to check the front end is to put the front of the Jeep up on Jack stands so that the jack stands are supporting the frame - while letting the front springs sag down so the front tires are still off of the ground. Then take each of the wheels and give them a three axis shake (up down, side to side front and front to back) to see if something is lose or just shot after 70 years. Also have an assistant turn the steering wheel (rock it) back and forth while you look for play. You might find that: - the spring bushings are shot - spring perches are loose or perhaps one is - the king pin races mounting surface in the DANA 25 are stretched - the king pin bearings are shot - there is a spindle that is not bolted up tight -and so on. Edited by Stev - 13 July 2018 at 3:26am |
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Stev
1946 CJ2A Trail Jeep (The Saint), 1948 CJ2A Lefty Restored |
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LesBerg
Member Joined: 09 Apr. 2014 Location: Athol, ID Status: Offline Points: 1554 |
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Stev is spot on. Every bushing, bearing, ball joint, nut and bolt between the frame and the tire needs to be tight, serviceable, and properly lubricated for the steering to be right.
Pictures to come... |
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1948 CJ2A 157713 24" Stretch "Old Ironsides"
1st Armored Div 6th Infantry Reg 3rd Infantry Bn Headquarters Company #161 rubigo in quo speramus - "In Rust we Trust" |
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LesBerg
Member Joined: 09 Apr. 2014 Location: Athol, ID Status: Offline Points: 1554 |
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Here's that steering brace. I'm not keen on attaching it to the bolt that ties into the bottom of the radiator, though. Next time the grill is off, I'm going to drill a hole through the crossmember and weld in a grade 8 decapitated bolt. Yes, I popped the zerk off the bellcrank. It's getting replaced this weekend. If there's no clearance for one in the usual location, I'll drill and tap the other side. For those paying extra close attention, yes. My fan sticks down well below the radiator. I'm finishing up a fan shroud for it. Yep that the lower radiator hose below and behind the balancer.
Edited by LesBerg - 19 July 2018 at 4:26am |
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1948 CJ2A 157713 24" Stretch "Old Ironsides"
1st Armored Div 6th Infantry Reg 3rd Infantry Bn Headquarters Company #161 rubigo in quo speramus - "In Rust we Trust" |
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Bill2A
Member Joined: 01 Mar. 2018 Location: Fort Worth, Tex Status: Offline Points: 517 |
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I had heard of a steering brace.
Now, I've seen one. I like it. Might like it better attatched to the cross member.
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1946 CJ2A 14098
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