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2.87s to 3.15s, need help, with set up? |
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1970390amx
AMC Addicted Joined: Jul/11/2008 Location: colorado Status: Offline Points: 3311 |
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2:87 carrier is the same as 3:15 carrier
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1970 390 4speed Bittersweet shadow mask AMX
1970 Amx missing most everything, or in a box |
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401MATCOUPE
AMC Addicted Joined: May/20/2010 Location: Salisbury, MD Status: Offline Points: 5370 |
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The center carrier changes from 2.73 to lower numerical number. The carrier from 2.87 to 5.00 are the same.
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Ross K. Peterson
68X,GoPac,343,AT,52A(1stCar) 68X,GoPac,390,4sp,52A 69X,GoPac,390,4sp,64A 70X,GoPac,390,4sp,87A,8 70X,GoPac,390,4sp,BBO,8 70 Jav SST,390,AT,BSO 74MatX,401,AT,Prototype 74MatX,401,AT |
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amc401t10
AMC Addicted Joined: Mar/09/2009 Location: east tn Status: Offline Points: 903 |
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got it back together and just took blue die reading. added .048 ratcheting noise gone now, turns much smother, pattern is toward the outside of the ring gear, covers the outside 2/3 of the tooth. going to add .032 more to the pinion and will post. carrier set at .009 on the dial. |
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1-owner 74 gremlin x 401, t10,3.73 12 bolt,750carb,reed 250@50 cam, roller rockers,msd,offy int.
72 amc matador 401 727 84 j10 ,360, 727 1970 4-door rebel sleeper(455 pontiac,turbo 400) 79 spirit,4.2 |
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amc401t10
AMC Addicted Joined: Mar/09/2009 Location: east tn Status: Offline Points: 903 |
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Drove that pinion race out again, under car on creeper it ant easy.ruins the shims . trying .175 shim stack today if time permits.
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1-owner 74 gremlin x 401, t10,3.73 12 bolt,750carb,reed 250@50 cam, roller rockers,msd,offy int.
72 amc matador 401 727 84 j10 ,360, 727 1970 4-door rebel sleeper(455 pontiac,turbo 400) 79 spirit,4.2 |
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tufcj
Supporter of TheAMCForum Supporter of TheAMCForum Joined: Jul/10/2007 Location: Watkins, CO Status: Offline Points: 4065 |
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If the pattern is on the outside of the ring gear then your pinion is probably already too deep. I'd remove shims instead of adding more.
I've never needed .175" shims. I'd say average is .100"-.120". Last AMC20 I set up with Yukon gears was good at .105". Bob tufcj Edited by tufcj - Apr/30/2017 at 12:58pm |
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69 AMX
74 Javelin AMX 67 Rogue If you need a tool and don't buy it... you'll eventually pay for it... and not have it. Henry Ford |
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Lyle
AMC Addicted Joined: Jul/17/2014 Location: None Status: Offline Points: 772 |
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Try this site and eliminate the guess work:
http://www.pirate4x4.com/tech/billavista/Gear_Setup/
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401MATCOUPE
AMC Addicted Joined: May/20/2010 Location: Salisbury, MD Status: Offline Points: 5370 |
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Did a set last weekend and the gears I took out had a .095 in the pinion and the new gears needed a .094. Something is way wrong if you need .175 on the pinion.
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Ross K. Peterson
68X,GoPac,343,AT,52A(1stCar) 68X,GoPac,390,4sp,52A 69X,GoPac,390,4sp,64A 70X,GoPac,390,4sp,87A,8 70X,GoPac,390,4sp,BBO,8 70 Jav SST,390,AT,BSO 74MatX,401,AT,Prototype 74MatX,401,AT |
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amc401t10
AMC Addicted Joined: Mar/09/2009 Location: east tn Status: Offline Points: 903 |
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ok tired of driving that damn race out, ordered a race today, turning mine down so I can slip fit and try to get this shim stack right. I tried it with stock .095 and it ratteled. tried it with aprox .150 no rattle but patteren still to far to the outside. trying .175ish after I get the race ready. I know this sounds like a lot but pattern is getting better each time. will post later hopefully. thanks |
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1-owner 74 gremlin x 401, t10,3.73 12 bolt,750carb,reed 250@50 cam, roller rockers,msd,offy int.
72 amc matador 401 727 84 j10 ,360, 727 1970 4-door rebel sleeper(455 pontiac,turbo 400) 79 spirit,4.2 |
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Jeeper80
AMC Fan Joined: Apr/25/2017 Location: Hawaii Status: Offline Points: 15 |
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If the contact pattern is high on the depth of the ring gear teeth (face contact) the pinion depth is too shallow, add pinion depth shims. If it's at the bottom of the ring gear teeth (flank contact) then remove shims. I have found it helpful to change only one setting at a time. Set your backlash at say .008 and return it there after you make a pinion depth change. Get the pinion depth correct first, then adjust your pattern toe-heel wise by adjusting backlash.
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amc401t10
AMC Addicted Joined: Mar/09/2009 Location: east tn Status: Offline Points: 903 |
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got it to .175ish
, and it looks good(I think) I'm having
a hard time getting a reading on the pattern, ive wedged a crow bar end between the ring and the case but it still is hard to read, I need more resistance I think while turning the yoke. last reading I had the backlash on .010. ps the backlash setting tight or loose just moves the pattern up or down on the teeth doesn't it, the pinion shim moves it left ot right on the tooth??? thanks
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1-owner 74 gremlin x 401, t10,3.73 12 bolt,750carb,reed 250@50 cam, roller rockers,msd,offy int.
72 amc matador 401 727 84 j10 ,360, 727 1970 4-door rebel sleeper(455 pontiac,turbo 400) 79 spirit,4.2 |
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