That would be the nut that holds the steering wheel to the steering shaft.
To replace an Isuza Rodeo steering the steering column should first be removed. Pop off the front steering wheel cover to see the steering wheel nut. Loosen the nut and remove the wheel.
remove ceter cap on steering wheel to gain access to large nut romve nut then use a steering wheel puller assembly pull steerinr wheel off the shaft
take horn button off of the steering wheel and you will see a large nut holding the wheel on, take the nut off and then you will need a steering wheel puller to get the wheel off it's splines.
Take the nut of the steering wheel under the horn and use a puller to get it off
take horn cap off the center of the steering wheel and you will see large nut holding the wheel to the spindle, loosen nut and then you will need a wheel puller, install puller and tighten the nut down on the puller until the steering wheel frees itself from the spindle and your done.
I am not sure this is the trouble, if you remove the cover on the steering wheel there will be a large nut if this nut is tight the splines on the wheel could be bad, might be looking at replacing the column, or the steering wheel. I the nut is loose simple tighten and replace cover.
Mine is a 14mm nut 1.5mm pitch.
carefully remove vinyl etc forom center of sterring wheel. remove nut. need steering wheel puller to pull it off once nut is removed.
PROPERLY remove air bag (if equipt), then remove nut holding steering wheel on and then use a steering wheel puller to remove it.
27 mm. You may want to check around, because VW switched to a 24mm steering wheel nut size in 1973.
i think this one is simple if you dont have a puller for the job you should not be trying very dumb since the old cars are the easiest to work on once you take the horn ring off and the big nut off the shaft you'll need a wheel puller to pull the wheel off.
take off center cover, remove large nut then use wheel puller to remove steering wheel