Register or Log In To remove these advertisements. |
|
|
|
Thread Tools | Display Modes |
05-10-2015, 06:43 PM | #1 |
Registered User
Join Date: Aug 2007
Location: Elkton, ky
Posts: 385
|
Need help with pinion angle
I need to measure for a one piece driveshaft but assume I should correct the pinion angle first.. This is a short wheelbase truck if it makes a difference.. I measured the angles and this is what I came up with.. At the tail shaft 4 degrees down toward the floor.. Pinion is 8 degrees up. A 12 degree difference seems extreme, have I measured wrong? Btw the truck is lowered 5/7. Spindle and springs/ springs and blocks.. Thanks for any info.
|
05-10-2015, 08:25 PM | #2 |
Registered User
Join Date: Oct 2008
Location: Marianna Arkansas
Posts: 7,277
|
Re: Need help with pinion angle
12 Degrees does seem excessive I would think that is about 8 to many in total and 4 even sounds a bit high to me. That may cause a drive line harmonic situation with that much angle but I'm more a paint guy so maybe someone else will speak up. Jim
|
05-10-2015, 08:44 PM | #3 |
Registered User
Join Date: Mar 2015
Location: Maine, NY
Posts: 30
|
Re: Need help with pinion angle
If the transmission yoke is 4 degrees down, the pinion should be 4 degrees up. If they are too far out of phase, a bad vibrations will take over.. Try this link.....
https://www.google.com/search?q=gm+s...0CCQQsAQ&dpr=1 |
05-10-2015, 08:45 PM | #4 |
Senior Member
Join Date: Sep 2008
Location: Harrison, Arkansas
Posts: 9,836
|
Re: Need help with pinion angle
Do a search on here for pinion angle. You will get some valuable info including drawings. Pictures are always good.
In a nutshell, if you project a line form the output on the tranny rearward, and a line from the pinion forward, the two lines should be parrallel.
__________________
other Larry Build thread, Arkansas K10 https://67-72chevytrucks.com/vboard/...=755797&page=5 The ability to speak several languages is an asset, but the ability to keep your mouth shut in any language is priceless. |
05-10-2015, 08:50 PM | #5 |
Registered User
Join Date: Aug 2007
Location: Elkton, ky
Posts: 385
|
Re: Need help with pinion angle
That being said, a 4 degree shim will correct my angle?
|
05-10-2015, 08:54 PM | #6 |
Registered User
Join Date: Mar 2015
Location: Maine, NY
Posts: 30
|
Re: Need help with pinion angle
as long as both angles are relatively even, they will run in phase ok, say 3 degrees down, and the rear pinion is 3 degrees up, for instance, .................or 8 down and 8 degrees up. exactly like davischevy stated, and look at the attached sketches I sent .
|
05-10-2015, 09:14 PM | #7 |
Registered User
Join Date: Aug 2007
Location: Elkton, ky
Posts: 385
|
Re: Need help with pinion angle
Thank you for the info guys.. Helped a lot..
|
05-10-2015, 10:14 PM | #8 |
Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,667
|
Re: Need help with pinion angle
|
05-11-2015, 06:54 AM | #9 |
Registered User
Join Date: Apr 2013
Location: South Westerlo, New York
Posts: 1,325
|
Re: Need help with pinion angle
http://www.macsmotorcitygarage.com/2...e-and-phasing/ Heres an interesting site .......
__________________
Thanks, Joe.. 1969 C/10, 348 C.I., 3X2 bbl. V8, 2004r , LWB. |
05-11-2015, 09:37 PM | #10 |
Senior Member
Join Date: Sep 2008
Location: Harrison, Arkansas
Posts: 9,836
|
Re: Need help with pinion angle
I should have been out there putting another two degree shim in mine instead of telling you what to do.
__________________
other Larry Build thread, Arkansas K10 https://67-72chevytrucks.com/vboard/...=755797&page=5 The ability to speak several languages is an asset, but the ability to keep your mouth shut in any language is priceless. |
Bookmarks |
|
|