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2.87s to 3.15s, need help, with set up? |
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amc67rogue 
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Joined: Nov/05/2008 Location: Phx. AZ. Status: Offline Points: 1578 |
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 Posted: May/03/2017 at 2:15pm |
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Try using the ring gear to rotate the pinion.
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Keith Coggins 67Rogue X code
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amc401t10
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Joined: Mar/09/2009 Location: east tn Status: Offline Points: 903 |
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Posted: May/03/2017 at 4:03pm |
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good idea, ill try that. 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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amc401t10
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Joined: Mar/09/2009 Location: east tn Status: Offline Points: 903 |
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Posted: May/03/2017 at 4:05pm |
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ps nice spread in muscle car review mag on a machine!!!
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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: 4097 |
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Posted: May/03/2017 at 4:22pm |
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I saw in a previous post you're using Prussian blue? That's really designed for higher pressure applications than gear marking (like checking bearing/race for wear). Use white or yellow gear marking grease and you'll get a clearer and more reliable reading.
I usually mark 3-4 teeth on the ring gear in 3 places around the ring gear, then turn the carrier a full turn. I have seen a couple of instances where run-out in the ring gear or carrier will affect the contact pattern, especially with old/used parts. Bob tufcj |
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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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one bad rambler
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Joined: Jan/09/2008 Location: On The Island Status: Offline Points: 2007 |
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Posted: May/03/2017 at 4:40pm |
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 68 AMX 390 4 Speed,68 American,64 American 2 Door Wagon Altered Wheelbase,78 Concord Build 360,727,8.8
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Jeeper80
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Joined: Apr/25/2017 Location: Hawaii Status: Offline Points: 15 |
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Posted: May/03/2017 at 9:24pm |
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Accordingto Randy's Ring and Pinion, used gears should be set for optimum pattern on the coast side.
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amc401t10
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Posted: May/05/2017 at 4:28pm |
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an 18 wheeler mechanic friend suggested white spray paint
, let it tack bout 3min then roll. I'm trying that next. thanks all.
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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
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Posted: May/05/2017 at 8:54pm |
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6PakBee
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Posted: May/06/2017 at 8:03am |
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This would be a red flag to me. Something isn't right here. As to setting up used gearing to new specs, I've only done it twice in my life and both times I had no problems with performance. I mean really, if you buy a used ring and pinion how do you know what the previous setup was? |
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Roger Gazur
1969 'B' Scheme SC/Rambler 1970 RWB 4-spd Machine 1970 Sonic Silver auto AMX All project cars. Forum Cockroach |
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401MATCOUPE
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Joined: May/20/2010 Location: Salisbury, MD Status: Offline Points: 5367 |
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Posted: May/06/2017 at 5:07pm |
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I am with Roger here....I have been watching this thread and have built dozens of AMC 20's with used AMC gears and never had a problem. I have all the Kent Moore tools as shown in the TSM and NEVER had to but more then a .105 shim in the pinion. Every rear has been quiet and never come back, I even did a hybrid of the two Types of carriers in 1965 that required a space of ,100 on the carrier to get proper measurements and that car has a lot of miles on it and will be at Gettysburg and has been to lots of other shows....all used parts, except new bearings and seals....owner just want a ratio change.
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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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purple72Gremlin wrote: