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11-18-2013, 02:54 PM | #1 |
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Trailing Arms Crossmember driveshaft clearance question
Has anyone had to cut or crind on their crossmember where the driveshaft goes through after lowering their truck.
Went to pick mine up from the alignment shop and my driveshaft is rubbing pretty hard on the crossmember. Heading back up after work with a plasma cutter. I thought maybe this is a common problem for people lowering their trucks 5/7 but I cant find any other threads about it.
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71 swb 350/4sp manual 5/7 static drop |
11-18-2013, 07:13 PM | #2 | |
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Re: Trailing Arms Crossmember driveshaft clearance question
Quote:
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67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. |
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11-18-2013, 10:56 PM | #3 |
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Re: Trailing Arms Crossmember driveshaft clearance question
I'd also like to hear some answers to this.
ksshane, is your driveshaft a one piece?
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68 SWB 5.3 turbo build thread: http://67-72chevytrucks.com/vboard/s...d.php?t=578220 |
11-19-2013, 01:08 AM | #4 |
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Re: Trailing Arms Crossmember driveshaft clearance question
ECE and Cpp I believe make a crossmember that has more driveshaft clearance as well as openings for exhaust so you dont have to run it under the crossmember
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11-19-2013, 01:49 AM | #5 |
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Re: Trailing Arms Crossmember driveshaft clearance question
5.5/8 drop with stock crossmember no problems.. 3.5" driveshaft..
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72 chevy swb Direct dealers for.. Vintage Air, Porterbuilt, Billet Specialties,Budnik wheels ,eddie motorsports, raceline wheels, intro wheels, Dakota Digital, precision, unisteer, Trimparts, and many many more... Laid Back Recreations.. Full restoration shop and full paint and body.. Kyle http://67-72chevytrucks.com/vboard/s...d.php?t=574629 |
11-19-2013, 07:55 AM | #6 |
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Re: Trailing Arms Crossmember driveshaft clearance question
Well my issue was a little different... yes it was rubbing on the crossmember, but not because of the drop.
Had a friend help me with the flip kit, and it just so happen that when I went to return the ball joint tool to Oreillys he tightened down the u-bolts on the rear end. Well he didn't get them tight enough. The rear end was twisting causing the driveshaft to raise up. Once I figured out the problem their where no issues. My friend felt horrible... It was an honest mistake and it happens.
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71 swb 350/4sp manual 5/7 static drop |
11-19-2013, 09:26 AM | #7 | |
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Re: Trailing Arms Crossmember driveshaft clearance question
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11-19-2013, 09:31 AM | #8 |
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Re: Trailing Arms Crossmember driveshaft clearance question
Now that you just finished your static drop it time to air bag it
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11-19-2013, 11:40 AM | #9 | |
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Re: Trailing Arms Crossmember driveshaft clearance question
Quote:
I always like repairs that dont cost money ........ !!!!!!!!! You have a leaf spring truck dont you ..? |
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11-19-2013, 01:12 PM | #10 |
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Re: Trailing Arms Crossmember driveshaft clearance question
Yep.. running leafs.
On a side note... Tommy.. stop showing all those sweet wheels in the vendor classifieds.....lol Everytime I look at one of your posts I can feel my wallet getting lighter and lighter..lol
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71 swb 350/4sp manual 5/7 static drop |
11-19-2013, 10:39 PM | #11 |
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Re: Trailing Arms Crossmember driveshaft clearance question
hello ksshane. I had that same problem. I cut my cab n cross member. the thing is, I don't have the money to finish it rite now. for the front, I will install spindles and bags to complete my air bag suspension set up. my wife's birthday & Christmas are around the corner. I spent a lot of money on my truck this year. the kids and wifey gotta have my funds the rest of the year.
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11-21-2013, 08:15 PM | #12 |
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Re: Trailing Arms Crossmember driveshaft clearance question
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04-08-2020, 06:25 PM | #13 |
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Re: Trailing Arms Crossmember driveshaft clearance question
Bringing this one back to the top.
Hoping there is more info now than when this thread left off. Read everal and found no answers. I have a 68 LWB. LS/T56 Magnum swapped. QA1 rear suspension as low as it will go (7" drop?). Engine is @ 4 degree down towards rear. I just got my 3.5" 1 piece DS made and it hits the top of the trailing arm crossmember before I can even get the DS in the rear yoke. So my options are..... I can cut out the top of the crossmember and build a loop up a few inches (2-3") or swap that crossmember for one that provides a good bit more clearance. The folks who make the aftermarket ones don't show measurements to let me make a decision on which one will do what I need. Anyone here have one and willing to provide measurements from the top of the frame to the top pf the loop? |
04-08-2020, 08:05 PM | #14 | |
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Re: Trailing Arms Crossmember driveshaft clearance question
Quote:
__________________
67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. |
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04-08-2020, 08:08 PM | #15 |
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Re: Trailing Arms Crossmember driveshaft clearance question
You can mod the original one or go aftermarket. Either one can be raised as needed. You'll just need to verify clearances & modify as needed.
This is the ECE style x-member from the pic above that's taller than GM's original piece. I raised it an additional 2" so it's about 3.5" taller than an original x-member hoop:
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67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. |
04-08-2020, 11:25 PM | #16 |
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Re: Trailing Arms Crossmember driveshaft clearance question
Thanks. I am leaning towards mod'ing the stock unit. No reason to buy something just to cut it up. May as well use what I got and hope I don't need to remove it to get it done.
Thinking about using some flat 1/4" or so by 4" plate shaped as needed and welded in. Then cut the top of the OEM unit out. I think some triangle gussets would help on the sides where you extended it. Surely can't hurt. Looks like the cab is gonna need a trim as well. |
04-09-2020, 12:13 AM | #17 | |
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Re: Trailing Arms Crossmember driveshaft clearance question
Quote:
Also.... Depending on how low it gets & because it has a longer wheel base, the bottom of that x-member might need to be modified as well since it dips lower than the rails @ mid frame.
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67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. |
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04-11-2020, 10:51 PM | #18 |
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Join Date: Dec 2017
Location: FtW Texas
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Re: Trailing Arms Crossmember driveshaft clearance question
I ended up mod'ing the stock crossmember.
I extended it up to give 4" more clearance than stock. Then my driveshaft didn't clear the bottom of the cab. I had to notch the square brace (think it was there for support of the tank?) that runs along the bottom of the cab. Anyway, notched it up to the floor of the cab and then cut the back wall of the cab to match. Used a 5" hole saw for this. Clamped a 10"x10" section of plywood in place that had a 5" hole in it to use to locate the saw. worked perfect. Got about 3 fingers room @ static ride height. Hits the bump stops before it hits the cab. No issues @ full droop. Not even close to contacting. Did all this w/the cab and bed (no floor) in place. |
04-12-2020, 01:58 PM | #19 | |
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Join Date: Apr 2001
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Re: Trailing Arms Crossmember driveshaft clearance question
Quote:
__________________
67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. |
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