HELP WITH 8.8" REAR END GEAR PATTERN

L

LT1LE

New Member

Dec 29, 2010

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Dec 29, 2010

#1

• Dec 29, 2010

• #1

How does the gear pattern look?

PINION SETUP:

PINION HEAD 1.886" SHIM 0.015"
PINION DEPTH 4.420"
4.420" - 1.886" (FORD RACING PINION HEAD) = 2.534"
3.100" - 0.566" = 2.534"

This is the tool i used:
http://static.summitracing.com/global/images/instructions/pinion setting tool combined atech.pdf

BACK LASH SETUP:

DS: 0.259" + 0.012" = 0.271"
PS: 0.100" + 0.100" + 0.020" + 0.020" + 0.020" = 0.260"
TOTAL BACK LASH 0.009"

Drive side:

Coast side:

 

trinity_gt

10 Year Member

Jan 31, 2003

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Canada

Dec 29, 2010

#2

• Dec 29, 2010

• #2

From Summit:



Opinion: Your pattern looks a little like the 2nd one down (coast side biased toward the outer edge, drive-side more toward the center).

 

Roger Ramjet

New Member

Oct 31, 2003

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Southern Maryland

Dec 29, 2010

#3

• Dec 29, 2010

• #3

it's gonna whine! Too much pinion shim.

 

L

LT1LE

New Member

Dec 29, 2010

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Dec 29, 2010

#4

• Dec 29, 2010

• #4

How much less should I try?
it's at .015". would .002" less be good or more like .004" less?

 

L

LT1LE

New Member

Dec 29, 2010

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Dec 30, 2010

#5

• Dec 30, 2010

• #5

+.005" On pinion shim.

How does it look now?

Drive side .015" SHIM / BACK LASH .009":

Drive side .020" SHIM / BACK LASH .007":

Coast side .015" SHIM / BACK LASH .009":

Coast side .020" SHIM / BACK LASH .007":

 

GDawg

Founding Member

Mar 22, 2002

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Nevada

Dec 30, 2010

#6

• Dec 30, 2010

• #6

Subscribing

 

L

LT1LE

New Member

Dec 29, 2010

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Dec 30, 2010

#7

• Dec 30, 2010

• #7

Anyone?

 

GDawg

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Mar 22, 2002

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Nevada

Dec 31, 2010

#8

• Dec 31, 2010

• #8

LT1LE said:

Anyone?

Click to expand...

To me it looks like an improvement but I would say just a tiny bit more. But I have never done this before. Only read about it.

 

trinity_gt

10 Year Member

Jan 31, 2003

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Canada

Dec 31, 2010

#9

• Dec 31, 2010

• #9

To me the 0.020" shim looks pretty good. I'd guess that if the backlash is right and the preloads are right you shouldn't get any noise with that.

I'd wait for one or two more opinions to be sure though

 

L

LT1LE

New Member

Dec 29, 2010

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Dec 31, 2010

#10

• Dec 31, 2010

• #10

Drive side .023" SHIM / BACK LASH .007":

Coast side .023" SHIM / BACK LASH .007":

 

R

rjs281

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Sep 26, 2004

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deer park tx

Jan 2, 2011

#11

• Jan 2, 2011

• #11

How did it come out? Am having mine done this week and might pass the info on to the guy doing it. I am sure he knows what he is doing but am still worried. This is my 3rd gear(the first 2 have winned).