![]() |
![]() |
#1 |
Registered User
Join Date: Apr 2008
Location: Oregon City, Oregon
Posts: 741
|
pinion angle question
I know this has been covered but I'll ask. In the photos below you will sort of see the pinion angle I have. I have installed a 2" lowering block and coils from an El Camino that should net me around a 5"+ drop. I flipped the trailing arm brackets to correct the pinion angle and now (without the bed or fuel tank in place) I have a slightly upward angle. I think it will work out but I'd like some experience opinions. I am thinking I'll wait until I get the bed on and a fuel tank (or simulated weight) and recheck the pinion angle. At that point I can either fab up some different brackets or install shims. So waddya all think?
|
![]() |
![]() |
![]() |
#2 |
2WD Jimmy
![]() Join Date: Mar 2005
Location: Davis County, Utah
Posts: 2,565
|
Re: pinion angle question
I would flip the cross member back over and use shims 'if' you need to.
|
![]() |
![]() |
![]() |
#3 |
Registered User
![]() Join Date: May 2007
Location: Rapid City South Dakota
Posts: 2,359
|
Re: pinion angle question
Absolutely have the actual weight on it, when setting up the angle.
__________________
Turp Mcspray New life for an old 2wd, farm blazer http://67-72chevytrucks.com/vboard/s...d.php?t=505987 My Blazer build http://67-72chevytrucks.com/vboard/s...d.php?t=342299 |
![]() |
![]() |
![]() |
#4 |
C/10 junkie
Join Date: Nov 2010
Location: Stockton Ca
Posts: 9,094
|
Re: pinion angle question
...
Posted via Mobile Device
__________________
Shawn 70 LWB C10 current driver/project http://67-72chevytrucks.com/vboard/s...d.php?t=663051 68 SWB C10 Work in progress.....SOLD http://67-72chevytrucks.com/vboard/s...d.php?t=559520 72 LWB C10 Sold 71 LWB C10 Sold 68 LWB C10 CST Sold http://youtu.be/kbB0QrBIs9k My mom always had the best advice. It was just a tad late. After a fall that involved blood, she'd say....."Careful!" ![]() |
![]() |
![]() |
![]() |
#5 |
Registered User
Join Date: Apr 2008
Location: Oregon City, Oregon
Posts: 741
|
Re: pinion angle question
|
![]() |
![]() |
![]() |
#6 |
C/10 junkie
Join Date: Nov 2010
Location: Stockton Ca
Posts: 9,094
|
Re: pinion angle question
Ok I found this on another thread.
__________________
Shawn 70 LWB C10 current driver/project http://67-72chevytrucks.com/vboard/s...d.php?t=663051 68 SWB C10 Work in progress.....SOLD http://67-72chevytrucks.com/vboard/s...d.php?t=559520 72 LWB C10 Sold 71 LWB C10 Sold 68 LWB C10 CST Sold http://youtu.be/kbB0QrBIs9k My mom always had the best advice. It was just a tad late. After a fall that involved blood, she'd say....."Careful!" ![]() |
![]() |
![]() |
![]() |
#7 |
Registered User
Join Date: Apr 2008
Location: Oregon City, Oregon
Posts: 741
|
Re: pinion angle question
Thanks Shawn. With that and some research it looks like the ubber cool trailing arm bracket flip is not a good thing to do. Should have thought that one out a bit and I would not have wasted my time with it...but things are cleaner down there now. Basically my pinion gear/shaft center line needs to match my transmission center line and let the secondary drive shaft do it's work. Hmmm...
|
![]() |
![]() |
![]() |
#8 |
Senior Member
![]() ![]() Join Date: Jan 2011
Location: Chattanooga TN
Posts: 6,224
|
Re: pinion angle question
Yes, it looks like the pinion is up a little higher than it needs to be. I usually try to run about 1deg down at the pinion. You don't want to completely zero it out or it will not have proper lubrication in the Ujoint cups. 1-2deg and you'll be fine.
Weight the rear end with what you'll have at finished ride height. Just eyeballing it I would suggest running 3 or maybe 4deg shims.
__________________
Chad 1967 C10 SWB - Project Savannah - 6.0/4L80 *Currently underway* 1968 C10 SWB - TOTY 2018, 50th Anniversary Tribute Project * Sold * Pride and Joy 1986 Silverado Short Fleet - Scarlet *Sold* 1985 Silverado Short Fleet *Sold* 2022 Jeep Gladiator Mojave 2001 Jeep Cherokee XJ 4x4 - Lifted, Built 1992 Jeep Cherokee XJ 4x4 - Lifted 2013 Honda Accord EX-L v6 Coupe 6spd (wife's ride) |
![]() |
![]() |
![]() |
#9 | |
Registered User
Join Date: Apr 2008
Location: Oregon City, Oregon
Posts: 741
|
Re: pinion angle question
Quote:
|
|
![]() |
![]() |
![]() |
#10 |
Registered User
Join Date: Jan 2007
Location: Sonoma, CA
Posts: 521
|
Re: pinion angle question
Before you go and swap everything back around, measure the angle at the trans and at the rear.
![]() Measure it at ride height and be sure. If you flip it back your driveline will be working as if it were stock, bottomed out condition 5"+ drop and worse when you put anything in the bed.
__________________
Oscar '72 Shortbed Fleetside '95 Jimmy 4X4 '69 GMC Custom Camper |
![]() |
![]() |
![]() |
#11 | |
Registered User
Join Date: Apr 2008
Location: Oregon City, Oregon
Posts: 741
|
Re: pinion angle question
Quote:
|
|
![]() |
![]() |
![]() |
#12 |
Senior Member
![]() ![]() Join Date: Jan 2011
Location: Chattanooga TN
Posts: 6,224
|
Re: pinion angle question
1 gallon of gas = 6.15lbs @ 68 degrees.
so, 15 gallon tank = roughly 92lbs. My point is you could simulate the weight. It will be easier to shim the rear with the tank out of the way. Just a thought.
__________________
Chad 1967 C10 SWB - Project Savannah - 6.0/4L80 *Currently underway* 1968 C10 SWB - TOTY 2018, 50th Anniversary Tribute Project * Sold * Pride and Joy 1986 Silverado Short Fleet - Scarlet *Sold* 1985 Silverado Short Fleet *Sold* 2022 Jeep Gladiator Mojave 2001 Jeep Cherokee XJ 4x4 - Lifted, Built 1992 Jeep Cherokee XJ 4x4 - Lifted 2013 Honda Accord EX-L v6 Coupe 6spd (wife's ride) |
![]() |
![]() |
![]() |
Bookmarks |
Thread Tools | |
Display Modes | |
|
|