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twin grip |
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cone
AMC Addicted Joined: Apr/17/2010 Location: pennslyvania Status: Offline Points: 568 |
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Posted: Sep/29/2020 at 1:03pm |
The rear axle was rebuilt less than 1000 miles with new pinion gears and bearings. I also installed a new twin grip. It has developed a clunking sound on deceleration or light cruse. I assumed it was a pinion gear that needed to be set again but it is tight and I discovered I can hold one wheel and turn the other with very little effort.The manual says to check the twin grip you put a torque wrench on the spindle nut and it should take 70-200 lbs to turn it but I have one piece axles so I don't have a nut to attach it to but I can turn it by hand just by holding on to the lug nut bolts. Should it be that easy and could a faulty twin grip account for the noise? Thanks
Edited by cone - Sep/29/2020 at 4:32pm |
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1987 J20, 87 Grand Wagoneer,70AMX,
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1970390amx
AMC Addicted Joined: Jul/11/2008 Location: colorado Status: Offline Points: 3312 |
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Faulty twin grip can make noise. What kind of car, what kind if twin grip, was it new or used?
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1970 390 4speed Bittersweet shadow mask AMX
1970 Amx missing most everything, or in a box |
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cone
AMC Addicted Joined: Apr/17/2010 Location: pennslyvania Status: Offline Points: 568 |
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It is a new AMC 20 trak lock on a 70 AMX. I got from east coast gear supply. I was told this is a copy of the original twin grip. I put a torque wrench on one of the lug nuts, I know thats not going to give me an accurate reading but it should be close and it only take about 15-20 lbs to turn it so it might be my problem.
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1987 J20, 87 Grand Wagoneer,70AMX,
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Mopar_guy
Supporter of TheAMCForum Joined: Jun/07/2009 Location: Ohio Status: Offline Points: 4805 |
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By any chance did you put synthetic gear oil in it?
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"Hemilina" My 1973, 5.7 Hemi swapped Javelin |
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304-dude
AMC Addicted Joined: Sep/29/2008 Location: Central Illinoi Status: Offline Points: 9081 |
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Did you use Ford limited slip additive? It in a little white bottle. Very smelly once you pop open the seal. If not, it's possible your gear oil was not proper enough for your limited slip. It's too late for adding it now, if missed. Did he state it was new? If used the case may be worn, and needs another steel plate in the pack.
Edited by 304-dude - Sep/29/2020 at 2:51pm |
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71 Javelin SST body
390 69 crank, 70 block & heads NASCAR SB2 rods & pistons 78 Jeep TH400 w/ 2.76 Low 50/50 Ford-AMC Suspension 79 F150 rear & 8.8 axles Ford Racing 3.25 gears & 9" /w Detroit locker |
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cone
AMC Addicted Joined: Apr/17/2010 Location: pennslyvania Status: Offline Points: 568 |
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Its a new unit and and I used the Ford limited slip additive with non-synthetic oil.
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1987 J20, 87 Grand Wagoneer,70AMX,
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Mopar_guy
Supporter of TheAMCForum Joined: Jun/07/2009 Location: Ohio Status: Offline Points: 4805 |
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It sounds like the cover needs to come off and do some checking. The reason I asked is because I've seen synthetic lube be so slick the clutches wouldn't hold. Amzoil was the worst for this but since you used the proper lube, that's not your issue.
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"Hemilina" My 1973, 5.7 Hemi swapped Javelin |
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BDCVG
AMC Addicted Joined: Dec/19/2007 Location: Endless Mtns. Status: Offline Points: 992 |
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Does the Trak=lok have a thrust button?
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1970 AMX 390 5 spd full Control Freaks front and rear suspension
2014 E63 AMG-S wagon 1965 Austin-Healey 3000 MK III |
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401MATCOUPE
AMC Addicted Joined: May/20/2010 Location: Salisbury, MD Status: Offline Points: 5368 |
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No, the thrust buttons are only on 2 piece factory units.
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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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Jmerican
AMC Addicted Joined: Mar/29/2016 Location: Seattle, Wa Status: Offline Points: 585 |
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I doubt the ECG Trac-loc is the same as the Twin Grip. It’s lame, that’s the problem.
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