Lowering Blocks Install ? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Dads72 · 04-25-2003, 10:37 PM

Could someone with patience and experience talk me through this, please?
I'm getting lowering blocks, and have no experience with rear suspensions.
What do I support/jack up/etc. to install them without killing myself?
Bet it's pretty simple, but I admit my ignorance.
Thanks

Dads72 · 04-25-2003, 10:38 PM

Should have mentioned that it's on a 72 LWB with coils and helper springs.

*Randy70C-10* · 04-25-2003, 10:39 PM

The easiest way I can think of is to jack up the frame of the truck itself, and support it with jackstands. Then you can lower the trailing arms.

*Randy70C-10* · 04-25-2003, 10:40 PM

Scratch that, you don't need to jack up the frame, just support it.

Dads72 · 04-25-2003, 10:41 PM

Thanks again, Randy.
Do the rear wheels stay on the ground, and do I put a jack under the pumpkin?

orange72 · 04-25-2003, 11:45 PM

yea i would prabably jack the truck up until all the spring pressure is off the trailing arms then support the frame with some jack stands..then you can just unbolt the u-bolts and lift the axle up with the jack stands and slip the lowering blocks in between. then bolt it back up and sit her down on the ground.

Low69CST · 04-26-2003, 12:39 AM

I would put the jack stands under the trailing arms and use the jack to push up the rear end after you get the nuts off the ubolts. I've found that they are usually rusted together ubelieveable well. It usually takes a big sledge hammer to get them apart.

Seke69 · 04-26-2003, 05:55 AM

are lowering blocks different for coils? or are they the same as the ones for leaf springs?

Nova_Cobra64 · 04-26-2003, 06:45 AM

I was looking at my 69 a while back and noticed the rear end is already underneath the trailing arm and figured that they must make block kits with longer U bolts. Mow much does a kit go for, and does it affect handling in negative ways?

My dad seems strongly against lowering, but I figure I need 2" all the way around to finish the truck off.

pissonNOS · 04-26-2003, 02:32 PM

my dads the same nova_cobra64 damn old schoolers he didnt even like it when i put a Rockford deck in haha

*Randy70C-10* · 04-26-2003, 04:56 PM

I was tired last night.

Go with what orange72 said and you'll be fine.

04-25-2003, 10:37 PM	#1
Dads72 Registered User Join Date: Nov 2002 Posts: 427	Lowering Blocks Install ? Could someone with patience and experience talk me through this, please? I'm getting lowering blocks, and have no experience with rear suspensions. What do I support/jack up/etc. to install them without killing myself? Bet it's pretty simple, but I admit my ignorance. Thanks

04-25-2003, 11:45 PM	#6
orange72 Registered User Join Date: Sep 2000 Location: huntington,texas,united states Posts: 399	yea i would prabably jack the truck up until all the spring pressure is off the trailing arms then support the frame with some jack stands..then you can just unbolt the u-bolts and lift the axle up with the jack stands and slip the lowering blocks in between. then bolt it back up and sit her down on the ground. __________________ 1972 chevy long bed. Currently under construction!! Bagged, 383/700r4.

04-26-2003, 12:39 AM	#7
Low69CST Registered User Join Date: May 2000 Location: Frankfort, Kentucky, USA Posts: 2,163	I would put the jack stands under the trailing arms and use the jack to push up the rear end after you get the nuts off the ubolts. I've found that they are usually rusted together ubelieveable well. It usually takes a big sledge hammer to get them apart. __________________ '69 CST Short fleetside Lowered, 400 small block, 700R4, 4 wheel disc brakes, front sway bar & rear camaro sway bar (in progress) '87 V10 4x4 Short Fleetside Quad Suspension and Dual Tanks

04-26-2003, 06:45 AM	#9
Nova_Cobra64 Registered User Join Date: Aug 2002 Location: Melville, SK Posts: 1,145	I was looking at my 69 a while back and noticed the rear end is already underneath the trailing arm and figured that they must make block kits with longer U bolts. Mow much does a kit go for, and does it affect handling in negative ways? My dad seems strongly against lowering, but I figure I need 2" all the way around to finish the truck off. __________________ 2004 Silverado - Beater 1969 GMC - In progress http://67-72chevytrucks.com/vboard/s...d.php?t=441683 2011 Aveo - Work commuter 2013 Crestliner Fish Hawk 1650 - The reason no work gets done on the project truck.

04-26-2003, 02:32 PM	#10
pissonNOS senior member Join Date: Feb 2003 Location: fort macleod alberta Posts: 2,770	my dads the same nova_cobra64 damn old schoolers he didnt even like it when i put a Rockford deck in haha __________________ 69 GMC bagged

04-25-2003, 10:38 PM	#2
Dads72 Registered User Join Date: Nov 2002 Posts: 427	Should have mentioned that it's on a 72 LWB with coils and helper springs.

04-25-2003, 10:39 PM	#3
Randy70C-10 Account Suspended Join Date: Mar 2001 Location: Virginia Beach, Va. U.S.A. Posts: 15,320	The easiest way I can think of is to jack up the frame of the truck itself, and support it with jackstands. Then you can lower the trailing arms.

04-25-2003, 10:40 PM	#4
Randy70C-10 Account Suspended Join Date: Mar 2001 Location: Virginia Beach, Va. U.S.A. Posts: 15,320	Scratch that, you don't need to jack up the frame, just support it.

04-25-2003, 10:41 PM	#5
Dads72 Registered User Join Date: Nov 2002 Posts: 427	Thanks again, Randy. Do the rear wheels stay on the ground, and do I put a jack under the pumpkin?

04-26-2003, 05:55 AM	#8
Seke69 Space Cadet Join Date: Mar 2003 Location: Twin Cities Posts: 132	are lowering blocks different for coils? or are they the same as the ones for leaf springs?

04-26-2003, 04:56 PM	#11
Randy70C-10 Account Suspended Join Date: Mar 2001 Location: Virginia Beach, Va. U.S.A. Posts: 15,320	I was tired last night. Go with what orange72 said and you'll be fine.



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