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**71CHEVYSHORTBED402** · 12-28-2018, 09:53 PM

Installed the upper control arms today. I assembled them Grumpy style, by threading the bushings with the shaft installed on the truck. So if it doesn't work out, I know just who to blame

Pretty much uneventful, but the RH side doesn't move up and down as freely as the LH side, couldn't tell you why. So I did the RH side over again, which was a wasted effort. It still doesn't move as freely, but I suspect it's good.

EDIT: I think I do know why the RH control arm doesn't move as freely. The rear seal contacts the control arm bracket. There's plenty of clearance on the LH side, I don't know why there would be a difference. It's not as if you can install the shafts backwards, I think?

Suppose I could add another shim. I installed the shims as they were beforehand. EDIT: That aint it. I pulled the cross arm off and it's stiff anyway. It moves well enough. IMO there's a design flaw on the RH side of some sort, probably in the bracket and/or shafts. Works anyway, so good enough for GM.

12-28-2018, 09:53 PM	#152
71CHEVYSHORTBED402 Senior Member Join Date: Feb 2009 Location: Northern Nevada Posts: 7,129	Re: What did you do to your truck today.The 3rd chapter Installed the upper control arms today. I assembled them Grumpy style, by threading the bushings with the shaft installed on the truck. So if it doesn't work out, I know just who to blame Pretty much uneventful, but the RH side doesn't move up and down as freely as the LH side, couldn't tell you why. So I did the RH side over again, which was a wasted effort. It still doesn't move as freely, but I suspect it's good. EDIT: I think I do know why the RH control arm doesn't move as freely. The rear seal contacts the control arm bracket. There's plenty of clearance on the LH side, I don't know why there would be a difference. It's not as if you can install the shafts backwards, I think? Suppose I could add another shim. I installed the shims as they were beforehand. EDIT: That aint it. I pulled the cross arm off and it's stiff anyway. It moves well enough. IMO there's a design flaw on the RH side of some sort, probably in the bracket and/or shafts. Works anyway, so good enough for GM. Attached Images __________________ Tony 71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assm. guide "kit" for restoring it from ground up. With assys, the guide accts for 1000s details such as OEM identifications& part numbers, written in short order. 700+ images include assm, illust., charts, and points of interest. Much of the info. applies to all 67-72 GM trucks, and to a lessor degree all 67-72 GM vehicles. My build thread, and more on the guide https://67-72chevytrucks.com/vboard/...d.php?t=730025 Last edited by 71CHEVYSHORTBED402; 01-06-2019 at 03:54 PM.