AMC throwout brg help...

ss wannabee · 02-25-2012, 07:59 AM

A friend has a '74 Javelin with the 360 and factory T-10. I guess AMC had trouble with the trans front brg retainer breaking in the early '70's and released a beefier version with a 1.400" snout diameter?

He wants to run this retainer...but now is having trouble finding a suitable t/o brg...at least at the parts store level. Needs a certain height for a perf. diaphragm clutch..that's not the question here.

There are some possibilities...I checked the popular perf. clutch mfgrs online. Need to know...WHAT is the desired clearance between the snout's od...and the bore size of the bearing....for a street-driven vehicle? Is .025-.035 too much?

Saw several 1.414" bearings in the BCA catalog...but the "other" dimensions weren't good for what he needs...This size too tight for street anyway?

Anybody had a similar experience with an AMC.....Jeff?? Tom??

Tom Goldman · 02-25-2012, 08:25 PM

The '71 and later AMC T-10 shared many diminsions with the Super T-10 2nd design.
There were also two different stand heights for the release arm pivit, which will remedy most problems with finger or diaphragm height , and arm angle.
The bearing you found will likely work if you change the pivit height.
Aftermarket and even stock rebuild clutches usually wont work with the stock height bearing or pivit.
McCleod has several different bearings that can be varied in height and will fit the T-10.
I may remember some P/N if I think on it long enough, it's been 20 or more years since I had a 4-speed AMC.

Jeff Lee · 02-26-2012, 12:58 AM

I'm at my desk and so happens I have a TO bearing on it. I don't have my calipers out. All I can tell you is it is what I've run in the past and is NAPA p/n 1625-12. Hope this helps.

FED 387 · 02-26-2012, 11:43 AM

I would contact Centerforce clutches they seem to have 3-4 different part numbers for AMC bearings may be able to answer your ??? the number Jeff has is no longer sold by NAPA they have a different number now---I know that there were at least 3 pivot balls for an AMC (I went thru that many years ago)--5/8==3/4===1 1/6 in---- If memory serves me 440-426 Chrysler brgs will work--- ya just have to get the right geometry with the fork/pivot/brg and the clutch pedal rod

ss wannabee · 02-26-2012, 01:35 PM

Thanks guys for all your help. Yes, the clutch is a Centerforce, and he's trying to evaluate info from them. Tom, thanks for the tips, I thought your Stocker was a stick!

Jeff, think he ran the 1625-12 brg. before...thought he brought an old one in with him...but wanted to go shorter this time...around 1.625" height?

FED...I "hit" all the online catalogs...some I couldn't get into...like Zoom. Saw that adjustable brg. from McLeod...might be the way to go...but it will be his call...FORGOT that the pivot ball height comes into play as well...

I saw that 1.414" bore id. dimension in an old BCA catalog...but I'm going to assume that a clearance of about .030" is ok between the brg. id and the trans snout's od, right?

He's also getting input from an AMC club...of which he is a member...I'm sure this will be wrapped-up soon!

02-25-2012, 07:59 AM	#1
ss wannabee Senior Member Join Date: Jun 2005 Posts: 663 Likes: 0 Liked 7 Times in 7 Posts	AMC throwout brg help... A friend has a '74 Javelin with the 360 and factory T-10. I guess AMC had trouble with the trans front brg retainer breaking in the early '70's and released a beefier version with a 1.400" snout diameter? He wants to run this retainer...but now is having trouble finding a suitable t/o brg...at least at the parts store level. Needs a certain height for a perf. diaphragm clutch..that's not the question here. There are some possibilities...I checked the popular perf. clutch mfgrs online. Need to know...WHAT is the desired clearance between the snout's od...and the bore size of the bearing....for a street-driven vehicle? Is .025-.035 too much? Saw several 1.414" bearings in the BCA catalog...but the "other" dimensions weren't good for what he needs...This size too tight for street anyway? Anybody had a similar experience with an AMC.....Jeff?? Tom??

02-25-2012, 08:25 PM	#2
Tom Goldman VIP Member Join Date: Jan 2003 Location: Allentown,PA Posts: 2,473 Likes: 878 Liked 857 Times in 234 Posts	Re: AMC throwout brg help... The '71 and later AMC T-10 shared many diminsions with the Super T-10 2nd design. There were also two different stand heights for the release arm pivit, which will remedy most problems with finger or diaphragm height , and arm angle. The bearing you found will likely work if you change the pivit height. Aftermarket and even stock rebuild clutches usually wont work with the stock height bearing or pivit. McCleod has several different bearings that can be varied in height and will fit the T-10. I may remember some P/N if I think on it long enough, it's been 20 or more years since I had a 4-speed AMC. __________________ Tom Goldman 1500 SG , 1506 STK

02-26-2012, 12:58 AM	#3
Jeff Lee VIP Member Join Date: Jul 2007 Location: Anthem, Arizona Posts: 2,766 Likes: 0 Liked 3 Times in 3 Posts	Re: AMC throwout brg help... I'm at my desk and so happens I have a TO bearing on it. I don't have my calipers out. All I can tell you is it is what I've run in the past and is NAPA p/n 1625-12. Hope this helps. __________________ Jeff Lee 7494 D/S '70 AMX

02-26-2012, 11:43 AM	#4
FED 387 VIP Member Join Date: Jun 2006 Posts: 3,409 Likes: 504 Liked 329 Times in 177 Posts	Re: AMC throwout brg help... I would contact Centerforce clutches they seem to have 3-4 different part numbers for AMC bearings may be able to answer your ??? the number Jeff has is no longer sold by NAPA they have a different number now---I know that there were at least 3 pivot balls for an AMC (I went thru that many years ago)--5/8==3/4===1 1/6 in---- If memory serves me 440-426 Chrysler brgs will work--- ya just have to get the right geometry with the fork/pivot/brg and the clutch pedal rod

02-26-2012, 01:35 PM	#5
ss wannabee Senior Member Join Date: Jun 2005 Posts: 663 Likes: 0 Liked 7 Times in 7 Posts	Re: AMC throwout brg help... Thanks guys for all your help. Yes, the clutch is a Centerforce, and he's trying to evaluate info from them. Tom, thanks for the tips, I thought your Stocker was a stick! Jeff, think he ran the 1625-12 brg. before...thought he brought an old one in with him...but wanted to go shorter this time...around 1.625" height? FED...I "hit" all the online catalogs...some I couldn't get into...like Zoom. Saw that adjustable brg. from McLeod...might be the way to go...but it will be his call...FORGOT that the pivot ball height comes into play as well... I saw that 1.414" bore id. dimension in an old BCA catalog...but I'm going to assume that a clearance of about .030" is ok between the brg. id and the trans snout's od, right? He's also getting input from an AMC club...of which he is a member...I'm sure this will be wrapped-up soon!