What did you do to your truck today.The 3rd chapter - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**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	#10
71CHEVYSHORTBED402 Senior Member Join Date: Feb 2009 Location: Northern Nevada Posts: 7,692	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 1971 C10 Custom Deluxe SWB 402/400TH A/C I developed an assembly information kit for restoring my truck from nuts and bolts. It's written in Assy. order, short & simple, packed with all OEM hardware ID; castings; part ID; 100s of part numbers; wiring simple - Resource, and trivial too. Much info. applies to all 67-72 GM, A/C vehicles, esp. trucks W/O saying. Full search ability, including to 700+ images of illus., parts, charts, Assy., points of interest, cab, bed, & front clip cart plans- Specials and cores were serviced out and R excluded e.g. front/rear glass, body/paint, engine core, rebuilt hinges, steering box, trans, etc. The project was in-line with long former professions developing process, policy, specs, demo, written for novices, admin., policy, engineers, development, systems & test - Public & govt 2, gross. Sell soft copy cheaply, PM if interested.Build thread:https://67-72chevytrucks.com/vboard/...d.php?t=730025 Last edited by 71CHEVYSHORTBED402; 01-06-2019 at 03:54 PM.

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