lowering blocks - The 1947 - Present Chevrolet & GMC Truck Message Board Network

71chevylongbed · 12-30-2003, 04:06 PM

will lowering blocks hurt the handling of my truck. I have already put a 2/4 drop on it and i would like to drop the back another inch or so to level it

ShamrockCustoms · 12-30-2003, 06:38 PM

well, if you go another inch (total of 5" drop in rear), you will most likely want to use some alignment shims to adjust the pinion angle of the rear end. at ride height, chek the angle at the trans end and at the yoke on the rear to get the angles. 2-4 degrees is what you want. of course, this is assuming that the driveshaft is level. you may be ok without them, but it never hurts to check and double-check. good luck!

PR454SS · 12-31-2003, 02:12 AM

Shamrock is right on with the shims, mine is dropped 5" in back and I had to add 2 degree shims to get it back within specs, also need to get an adjustable panhard bar if you don't already have one

sactoC10 · 01-09-2004, 12:43 PM

I use 3" Eibach rear drop springs and have 1.5" of drop with blocks and all is well. When I had 2" of additional rear drop with this combination, I could feel the drivetrain struggling a bit, so you'll need shims at 5" in my opinion. I need to get some before going back down to 5" total.

JT

12-30-2003, 04:06 PM	#1
71chevylongbed Got Horsepower? Join Date: Sep 2003 Location: IDAHO Posts: 406	lowering blocks will lowering blocks hurt the handling of my truck. I have already put a 2/4 drop on it and i would like to drop the back another inch or so to level it __________________ 2001 Dodge 2500 Cummins, 4 inch lift, 35" Toyo MT's on Ultra wheels, P-Pump Conversion, AFE intake, Fass, 5 inch exhaust, Pyro,Boost,and Fuel pressure guages, and a whole bunch of other stuff "The Money Pit" SOLD-71 Chevy C10 long bed- 2/4 drop-- 350,th400, Edelbrock performer RPM intake,Edelbrock 600 CFM carb,Crower 240 cam,port and polish,Dynomax headers,HEI ignition,dual 2.5 inch exhaust with Flowmaster 50 series mufflers

12-30-2003, 06:38 PM	#2
ShamrockCustoms Project56 on hold Join Date: Aug 2003 Location: Burleson, TX Posts: 489	well, if you go another inch (total of 5" drop in rear), you will most likely want to use some alignment shims to adjust the pinion angle of the rear end. at ride height, chek the angle at the trans end and at the yoke on the rear to get the angles. 2-4 degrees is what you want. of course, this is assuming that the driveshaft is level. you may be ok without them, but it never hurts to check and double-check. good luck! __________________ Shamrock Customs Forever-in-the-Future Custom Shop 2009 Mitsubishi Lancer GTS daily driver 1956 Chevy Stepside rodstoration on winter hold

12-31-2003, 02:12 AM	#3
PR454SS Registered User Join Date: Aug 2003 Location: Louisville, TN Posts: 338	Shamrock is right on with the shims, mine is dropped 5" in back and I had to add 2 degree shims to get it back within specs, also need to get an adjustable panhard bar if you don't already have one __________________ PR Too many projects, not enough time! 72SWB 350/350TH, 3500stall,525 lift cam 3:73 posi. Sold! 69LWB Flatbed 350/Super T-10, ported/polished 481 heads, 480 lift cam. 78SWB 468/400TH, ported/polished Alum. heads, 3:42 posi, 3000 stall on 17x8 and 18x9.5's 77 Jeep CJ-5 304V8 fiberglass body on 36" Ground Hawgs

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01-09-2004, 12:43 PM	#4
sactoC10 71 DELUX Join Date: Sep 2003 Location: Northern CA / Sac Posts: 1,055	I use 3" Eibach rear drop springs and have 1.5" of drop with blocks and all is well. When I had 2" of additional rear drop with this combination, I could feel the drivetrain struggling a bit, so you'll need shims at 5" in my opinion. I need to get some before going back down to 5" total. JT



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