Ring and pinion set up question

Ed Wright · 02-21-2015, 11:55 PM

You mean Pinion Depth? i've never heard the term Pinion Cone. More shim puts it deeper. I have never seen one require a shim as thin as you mentioned. I can't remember ever using a shim thinner than .028". As has been mentioned, .030" to .033" is very common.

Alan Roehrich · 02-22-2015, 12:17 AM

Try a 0.035" shim between the pinion gear and the pinion, and 0.008" to 0.010" back lash, as measured at the outside end of the ring gear teeth, measured 4-8 places around the ring gear. Make sure you're measuring the back lash with the dial indicator as close to perpendicular to the rotation of the gear as possible.

pbp1 · 02-23-2015, 01:24 AM

If the pattern comes to a point on the root side, you need to pull the pinion farther away from the ring gear, which in this case would mean removing some pinion shim. That being said, removing shim would move you outside the normal range on shim. I would make sure that the inner pinion race is fully seated in the housing bore as this would give you a false reading.

Dana Fitzpatrick · 02-24-2015, 06:12 PM

Thank you for all of your replies. I will be in the garage working on it tonight,I'll let you know how it comes out. Thanks again.

Dana Fitzpatrick · 02-25-2015, 11:30 PM

Once again,thank you all for the help. I finished with the pattern set-up and ended up with a .028 pinion shim and .009-.010 back lash. The pattern still looked good with a .030 shim,.032 was too deep.I talked with a tech at Strange,he checked with an assembler,who said he normally ends up with a .020-.028 pinion shim with the Strange 12 bolts.On a side note,I had to wrap a shop rag around the pinion between the yoke and the housing to get a good preload on the gears. Then I turned the ring gear with a wrench on the ring gear bolts.Once I did that,I got a very clear pattern. Thanks to Johnny at Motive/Richmond for the tip.

02-21-2015, 11:55 PM	#1
Ed Wright Veteran Member Join Date: Mar 2005 Location: Sand Springs, OK Posts: 8,132 Likes: 896 Liked 390 Times in 170 Posts	Re: Ring and pinion set up question You mean Pinion Depth? i've never heard the term Pinion Cone. More shim puts it deeper. I have never seen one require a shim as thin as you mentioned. I can't remember ever using a shim thinner than .028". As has been mentioned, .030" to .033" is very common. __________________ Ed Wright 4156 SS/JA

02-22-2015, 12:17 AM	#2
Alan Roehrich Veteran Member Join Date: May 2006 Location: Murfreesboro TN Posts: 5,118 Likes: 1,578 Liked 1,837 Times in 417 Posts	Re: Ring and pinion set up question Try a 0.035" shim between the pinion gear and the pinion, and 0.008" to 0.010" back lash, as measured at the outside end of the ring gear teeth, measured 4-8 places around the ring gear. Make sure you're measuring the back lash with the dial indicator as close to perpendicular to the rotation of the gear as possible. __________________ Alan Roehrich 212A G/S

02-23-2015, 01:24 AM	#3
pbp1 Junior Member Join Date: Mar 2013 Posts: 80 Likes: 12 Liked 27 Times in 6 Posts	Re: Ring and pinion set up question If the pattern comes to a point on the root side, you need to pull the pinion farther away from the ring gear, which in this case would mean removing some pinion shim. That being said, removing shim would move you outside the normal range on shim. I would make sure that the inner pinion race is fully seated in the housing bore as this would give you a false reading.

02-24-2015, 06:12 PM	#4
Dana Fitzpatrick Member Join Date: May 2009 Posts: 148 Likes: 4 Liked 10 Times in 6 Posts	Re: Ring and pinion set up question Thank you for all of your replies. I will be in the garage working on it tonight,I'll let you know how it comes out. Thanks again.

02-25-2015, 11:30 PM	#5
Dana Fitzpatrick Member Join Date: May 2009 Posts: 148 Likes: 4 Liked 10 Times in 6 Posts	Re: Ring and pinion set up question Once again,thank you all for the help. I finished with the pattern set-up and ended up with a .028 pinion shim and .009-.010 back lash. The pattern still looked good with a .030 shim,.032 was too deep.I talked with a tech at Strange,he checked with an assembler,who said he normally ends up with a .020-.028 pinion shim with the Strange 12 bolts.On a side note,I had to wrap a shop rag around the pinion between the yoke and the housing to get a good preload on the gears. Then I turned the ring gear with a wrench on the ring gear bolts.Once I did that,I got a very clear pattern. Thanks to Johnny at Motive/Richmond for the tip.