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Post by caleb21 on Apr 10, 2013 15:01:27 GMT -5
How much shorter do I need to cut the lower trailing arms on a 73 impala to get the pinion angle right. I don't wanna go to cuttin and cut to much out.
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Post by bluecrew72 on Apr 10, 2013 15:02:51 GMT -5
Lengthen te top  |
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Post by Hendershot on Apr 10, 2013 16:04:25 GMT -5
or use 80s ford lowers they fit also
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Post by caleb21 on Apr 10, 2013 16:37:58 GMT -5
Lengthen te top Lengthen them with what rules say add no metal |
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Post by STROMI 121 on Apr 10, 2013 17:08:50 GMT -5
You can remove both lowers and pull the rear-end forward with a ratchet strap on each side and pull rear forward until desired pinion angle is achieved. Then measure the distance between the holes and cut and re-weld the arms then reinstall. This is of course performed with the car on jack stands or a lift. I usually cut them about 2-3 inches depending on the car and rear-end that I am using. I usually just overlap them and re-weld both sides. Are you running a slider? If not make sure to clearance the u-joints before shortening and reinstalling the driveshaft. Opinions will vary greatly on this subject. This is just the way I do it.
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Post by bluecrew72 on Apr 10, 2013 17:34:37 GMT -5
Lengthen te top Lengthen them with what rules say add no metal Well you didn't say that.... Too bad you can't |
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Post by caleb21 on Apr 10, 2013 17:39:18 GMT -5
Yeah you can't run a slip shaft either so was you meaning Clarence the u joints from hitting the car?
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Post by michaels46x on Apr 10, 2013 19:40:36 GMT -5
Lengthen te top Lengthen them with what rules say add no metal Get two sets, cut overlap and weld. Makes one upper trailing arm with no added metal. That is called a grey area. |
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Post by mudslinger on Apr 10, 2013 19:44:16 GMT -5
I lap mine 1 inch and weld a pipe in it also for strength.
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Post by STROMI 121 on Apr 10, 2013 21:36:16 GMT -5
Yeah you can't run a slip shaft either so was you meaning Clarence the u joints from hitting the car? You said it was a 73 Impala, so I am assuming you are running the stock double cardian driveshaft. I am referring to taking a grinder, die grinder, drimmel tool, deburring tool, or ziz wheel or whatever you have available to grind down some of the metal on the yoke and driveshaft flange so that the u-joint has more articulation. There are small tabs that are designed into the stock parts designed to limit movement. If you look at the driveshaft laying on a bench its not hard to figure out. It doesn't take much to modify it. I hope this helps. |
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Post by caleb21 on Apr 11, 2013 23:14:41 GMT -5
Yeah you can't run a slip shaft either so was you meaning Clarence the u joints from hitting the car? You said it was a 73 Impala, so I am assuming you are running the stock double cardian driveshaft. I am referring to taking a grinder, die grinder, drimmel tool, deburring tool, or ziz wheel or whatever you have available to grind down some of the metal on the yoke and driveshaft flange so that the u-joint has more articulation. There are small tabs that are designed into the stock parts designed to limit movement. If you look at the driveshaft laying on a bench its not hard to figure out. It doesn't take much to modify it. I hope this helps. Yes I no exactly what you mean iv never thought about doing that thanks for the advice ill defiantly do that to my drive shafts! |
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Post by caleb21 on Apr 11, 2013 23:15:49 GMT -5
Lengthen them with what rules say add no metal Get two sets, cut overlap and weld. Makes one upper trailing arm with no added metal. That is called a grey area. Are you saying make upper trailing arms out of the lower ones? |
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2old4this
Heat Winner
We may not have all the answers but, we're big enough to be questionable.
Posts: 267
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Post by 2old4this on Apr 12, 2013 6:18:42 GMT -5
Get two sets, cut overlap and weld. Makes one upper trailing arm with no added metal. That is called a grey area. Are you saying make upper trailing arms out of the lower ones? I could be wrong but, I believe the tip he is trying to pass along to you is to get two sets of top arms. Cut them to the desired length and then weld the two pieces together. In building them this way you have added no metal. |
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Post by jaygreen80 on Apr 12, 2013 12:38:41 GMT -5
If you shorten lowers it will pull the rearend forward and if you do it too much your tires will rub. Keep that in mind. I always lengthen the uppers.
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Post by michaels46x on Apr 12, 2013 16:55:35 GMT -5
Are you saying make upper trailing arms out of the lower ones? I could be wrong but, I believe the tip he is trying to pass along to you is to get two sets of top arms. Cut them to the desired length and then weld the two pieces together. In building them this way you have added no metal. BINGO! |
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