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Torque steer on monster trucks

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Old 03-23-2018, 06:36 PM
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Default Torque steer on monster trucks

Iíve been fighting this blasted tq steer on my lst and I need help.

It was an old school lst but now Iíve installed everything from a chop shop from a 3xle so I got all the beefy stuff better axles center diff minus chassis and steering basically.

This is a center diff conversion and diff fluids is 200/500/100.

It has sway bars raven springs 40w shock oil.

Servo is single 7955

Problem is that on power is always tqís to the left sometimes violent like a drag car on stock suspension with too much power.

So for those of you guys with center diff style monster trucks what diff fluid are you running?
Am I too heavy on the fluids or got the weight placement wrong like heavy in rear vs light fluid weight.?

This is thing is a blast to drive with the exception of this issue.

Thanks in advance
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Old 03-23-2018, 06:57 PM
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I have an XXL2E but no center diff so I can’t comment on your fluid choice for your particular truck.

What ESC are your running? I’m wondering if your ESC BEC can handle the amp draw coming from the single 7955. Just a thought.
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Old 03-23-2018, 07:08 PM
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Lol sorry.

Castle. Mm2 with a 4292 1480kv hobbystar motor

My other lst is built the same but has a tranny and 2200kv motor

With same mm2

Thanks for reply.

Another thing to check and double check
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Old 03-24-2018, 02:01 AM
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If you can adjust the Camber; try it (add 0.5į).
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Old 03-24-2018, 05:36 AM
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Ok maybe I need to explain better.

It tracks straight drives normal and the truck is zeroed.

Give it gas at basically any speed the truck goes left never right.

I just got gone taking all the 1st gen suspension components and driveline off in favor of the 3xle truck suspension hoping the tq steer would go away but that didn’t help either.
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Old 03-24-2018, 08:40 AM
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What I have seen on videos is that when accelerating, one wheel is kicking to the left or right rappidly. For example on this video, seen between 3:19-3:22, some wheel wobble caused by torque steer and then corrected by TSM. https://www.youtube.com/watch?v=hN5HCeAmroE

As far as in my case I never really solved the issue, it is a bit better since I chaned to new wheels and driving on a dry road with no pebbles or water etc. And I have checked everything I think.

Me too some times has violent torque steer, I remember applying a bit too much throttle entering a ramp and the truck was thrown sideways, and I have never seen that before. When jumping it is important that those plastic ramps are straight, if one ramp is a bit off the truck will not jump straight. I also have a 4092 motor, they have alot of torque so I am not surprised if it has something to do with it. But the savage xl is balanced, all components in the middle and lipos on the side so the weight balance is good.
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Old 03-24-2018, 08:56 AM
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There is enough in that box now to do two lst builds lol



I think it’s pretty centered

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Old 03-24-2018, 09:00 AM
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I wonder how the 3xle guys are doing since I know they are center diff

But I do know on 4-5s the truck isn’t doing it as much and I’m sure 2200kv in the 3xle isn’t as torky compared to a 4092 1480kv

I guess I’m gonna have to add some punch control in the truck lol
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Old 03-24-2018, 01:44 PM
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Hello ,

it is possible to know which type of motor support used and / or a picture of how differential is installed

thank you
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Old 03-24-2018, 02:34 PM
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Yeah no problem

Markhor designs
I’m out and about so pics of bottom later
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Old 03-24-2018, 04:25 PM
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thank you!
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Old 03-24-2018, 04:43 PM
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Old 03-25-2018, 09:05 AM
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brilliant!
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Old 03-25-2018, 09:53 AM
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Originally Posted by marco70 View Post
brilliant!
It most certainly is and Iím partial to it since I had some input in it.

Well worth contacting him if you want one.
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Old 03-25-2018, 10:39 AM
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you dealing with torque drift not steer .. so are all tires same diameter?.. if its going left on straight away then left side tires are slightly larger or spinning faster than right.
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