what rear susp is this?

[jsf74]

i have a modified chassis by (????????) and im trying to figure out this hack job of a rear suspension. when i picked it up the guy said he added a j bar which can be seen in the pics but its not right for sure. i would like to know what rear susp is supposed to be in this car so i can get it back to square one. one other thing i have no idea who's chassis this is either. i would have passed on the deal but i could not turn it down for the price.

[jsf74]

[jsf74]

[Egoracing]

4 link, Not sure why he had to add the J bar, looks like someone had a rear mounted unit but it is on the wrong side. Was it an asphalt car??

[TS3g]

Ego and I must be looking at different pictures.

What I see is 2-link for sure on the left (only one trailing arm attached to a clamped bracket on rearend). I really can't tell what is going on with the right side. It appears to be 2-link as well with a brake floater, but I can't tell exactly what the upper bar attaches to. If both the upper and lower bars attach to a floating birdcage, then it is 4-link on the right. The spring is definitely clamped, just can't tell where the trailing arm(s) mount. The J-bar looks fine to me. Also the rear mounted panhard bar mount on the frame would work as well, not backwards like Ego indicated.

My suggestions: Get a birdcage for the left side and 4-link it with the spring behind, shock in front on the birdcage, or if you want to use what you have now, keep the 2-link and put the spring in front and the shock behind. I can't really say in the right side. Need a pull bar as well.

[jsf74]

Pretty sure it was a dirt car. The j bar was added by the last owner who never raced it. I see the top mount on the frame for the 4th bar but it's not on the rear end.

[Egoracing]

If you look at the 7th pick down the RR top arm is on the rear end. I was looking at the grease fitting on the LR birdcage, I see what you are saying about no top link mount. In the 9th pick it looks like they cut the top mount off of the birdcage, you can see where it was ground on. Also you can see in several of the pics that the rear end housing is clean where the birdcages look like they were rotating. I am not sure how it would work as a 2 link if the LR is not welded to the rear.
Lightning chassis did the long panhard bar like that on asphalt but it would be wrong for asphalt is what I ment to say, not that it is wrong for dirt.

Will the LR mount rotate on the housing when you jack it up or is it welded solid?

[rubbinsracin]

its definitely some type of 4 bar car. maybe it has some weird rear axle in it that the guy threw together to get it to "roller" form? is there even a mount for the left upper 4 bar on the axle side?

[dirttrackrocker]

If you look at the 7th pick down the RR top arm is on the rear end. I was looking at the grease fitting on the LR birdcage, I see what you are saying about no top link mount. In the 9th pick it looks like they cut the top mount off of the birdcage, you can see where it was ground on. Also you can see in several of the pics that the rear end housing is clean where the birdcages look like they were rotating. I am not sure how it would work as a 2 link if the LR is not welded to the rear.
Lightning chassis did the long panhard bar like that on asphalt but it would be wrong for asphalt is what I ment to say, not that it is wrong for dirt.

Will the LR mount rotate on the housing when you jack it up or is it welded solid?

It won't work at all as a 2 link if it isn't welded to the housing... The Birdcage would rotate and the LR would move back and forth 5 - 6 inches.

[dirttrackrocker]

Looks like an RC chassis, but, not 100% sure. We have an RC street stock and a lot of the mounts and stuff look the same.

[TS3g]

If you look at the 7th pick down the RR top arm is on the rear end. I was looking at the grease fitting on the LR birdcage, I see what you are saying about no top link mount. In the 9th pick it looks like they cut the top mount off of the birdcage, you can see where it was ground on. Also you can see in several of the pics that the rear end housing is clean where the birdcages look like they were rotating. I am not sure how it would work as a 2 link if the LR is not welded to the rear.
Lightning chassis did the long panhard bar like that on asphalt but it would be wrong for asphalt is what I ment to say, not that it is wrong for dirt.

Will the LR mount rotate on the housing when you jack it up or is it welded solid?

Okay, i see what you are saying. I never even noticed the grease fittings. I don't see any retaining rings though, which makes me think they are locked solid to the tube. I guess we really need to know if the birdcages are actually floating or not as to whether it is a 2-link or 4-link car.

[powerslide]

looks like 2link w/ RR brake floater.

Like others have asked does the clamp the spring is mounted on the rearend rotate when you jack it up? Looks pretty cobbled up. probably an old asphalt car.

[rubbinsracin]

maybe it was ran as a sport mod?

[Egoracing]

maybe it has some weird rear axle in it that the guy threw together to get it to "roller" form?

I think you may have hit the nail on the head!

[dirttrackrocker]

The other thing I noticed is, the bracket on top of the rear housing for the pull bar seems to be backwards.. It is leaning toward the rear, it should lean forward so that the pull bar mounts 12" above and 4" ahead of axle center line. With it the way it is, instead of gaining traction as the housing rotates because of increased angle, it will actually lose traction because as it rotates, the angle will decrease. This looks to be a cobbled together mess.