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Re: 308 bearing on a 4 speed - different sizes? [Re: LAR_414] #2441554 01/27/18 04:03 PM 01/27/18 04:03 PM
Joined: Jan 2003 Posts: 1,908 Nebraska 4 4406bbl top fuel
4406bbl top fuel 4 Joined: Jan 2003 Posts: 1,908 Nebraska	I think that motion bearing is a 308 sg10, you need 308 sg8, sg8s are no longer made, unless something has changed.

Re: 308 bearing on a 4 speed - different sizes? [Re: 4406bbl] #2441558 01/27/18 04:10 PM 01/27/18 04:10 PM
Joined: Feb 2012 Posts: 4,452 Morristown Tn. 7 71birdJ68 master
71birdJ68 master 7 Joined: Feb 2012 Posts: 4,452 Morristown Tn.	Does anybody have a Temken part number for this bering?

Re: 308 bearing on a 4 speed - different sizes? [Re: 71birdJ68] #2441560 01/27/18 04:14 PM 01/27/18 04:14 PM
Joined: Jan 2003 Posts: 1,908 Nebraska 4 4406bbl top fuel
4406bbl top fuel 4 Joined: Jan 2003 Posts: 1,908 Nebraska	308sg8 is all I have ever seen no matter the brand. Chinese is it as far as I know.

Re: 308 bearing on a 4 speed - different sizes? [Re: 4406bbl] #2441600 01/27/18 05:05 PM 01/27/18 05:05 PM
Joined: Feb 2012 Posts: 4,452 Morristown Tn. 7 71birdJ68 master
71birdJ68 master 7 Joined: Feb 2012 Posts: 4,452 Morristown Tn.	Which trans does this go in? And where in the trans does it go?

Re: 308 bearing on a 4 speed - different sizes? [Re: 4406bbl] #2441614 01/27/18 05:22 PM 01/27/18 05:22 PM
Joined: Jan 2003 Posts: 10,714 North Dakota 6PakBee I Live Here
6PakBee I Live Here Joined: Jan 2003 Posts: 10,714 North Dakota	Originally Posted By 4406bbl I think that motion bearing is a 308 sg10, you need 308 sg8, sg8s are no longer made, unless something has changed. And just when you think you have cut a fat hog in the butt...... "We live in a time when intelligent people are being silenced so that stupid people won't be offended".

Re: 308 bearing on a 4 speed - different sizes? [Re: LAR_414] #2441839 01/28/18 12:19 AM 01/28/18 12:19 AM
Joined: Feb 2012 Posts: 637 SoMd, USA 1 135sohc mopar
135sohc mopar 1 Joined: Feb 2012 Posts: 637 SoMd, USA	Common story. On the 2.2 era fwd manual transmissions there are two special totally odd sized bearings that support the pinion/countershaft. One is a sealed ball bearing and the other is a straight roller. NSK and Koyo were the OEM and neither one of them wants to talk with you, they both tell you its a proprietary design and still controlled by the customer (chrysler). Chrysler long ago stopped supporting anything with the transmission models they were used in. I bought as many bearing sets as I could find at the price I was willing to pay for them. Vacuum bagged with VCI paper and stored in my safe deposit box.

Re: 308 bearing on a 4 speed - different sizes? [Re: 135sohc] #2442364 01/28/18 06:40 PM 01/28/18 06:40 PM
Joined: Dec 2004 Posts: 10,553 Rittman Ohio fourgearsavoy I Live Here
fourgearsavoy I Live Here Joined: Dec 2004 Posts: 10,553 Rittman Ohio	Unless all you have is a 308 case there is no reason you can't use a 307 bearing case. I have built quite a few 307 bearing HEMI boxes and they are perfectly fine. Just because you can't find a 308 bearing at your local parts store doesn't mean they aren't available. I never go to a parts store for a bearing because they are limited to what applications they have in front of them. I buy the correct 308 bearing from Akron Bearing and they have them in stock. I run a 307 bearing HEMI box in my Savoy and it's working just fine. I would prefer a sealed bearing in my transmissions because the chunks of brass and metal floating around in the gear oil is the reason these bearing fail. My next transmission will probably have sealed bearings in it Gus 64 Plymouth Savoy 493 Indy EZ's by Nick at Compu-Flow 5-Speed Richmond faceplate Liberty box Dana 60

Re: 308 bearing on a 4 speed - different sizes? [Re: fourgearsavoy] #2442382 01/28/18 07:02 PM 01/28/18 07:02 PM
Joined: Jan 2003 Posts: 1,908 Nebraska 4 4406bbl top fuel
4406bbl top fuel 4 Joined: Jan 2003 Posts: 1,908 Nebraska	Originally Posted By fourgearsavoy Unless all you have is a 308 case there is no reason you can't use a 307 bearing case. I have built quite a few 307 bearing HEMI boxes and they are perfectly fine. Just because you can't find a 308 bearing at your local parts store doesn't mean they aren't available. I never go to a parts store for a bearing because they are limited to what applications they have in front of them. I buy the correct 308 bearing from Akron Bearing and they have them in stock. I run a 307 bearing HEMI box in my Savoy and it's working just fine. I would prefer a sealed bearing in my transmissions because the chunks of brass and metal floating around in the gear oil is the reason these bearing fail. My next transmission will probably have sealed bearings in it Gus Thats good to know, will call them as I need 2 and my local has the incorrect 308. Thanks

Re: 308 bearing on a 4 speed - different sizes? [Re: fourgearsavoy] #2443304 01/30/18 11:17 AM 01/30/18 11:17 AM
Joined: Nov 2006 Posts: 356 NE M moparpoolman enthusiast
moparpoolman enthusiast M Joined: Nov 2006 Posts: 356 NE	Originally Posted By fourgearsavoy Unless all you have is a 308 case there is no reason you can't use a 307 bearing case. I have built quite a few 307 bearing HEMI boxes and they are perfectly fine. Just because you can't find a 308 bearing at your local parts store doesn't mean they aren't available. I never go to a parts store for a bearing because they are limited to what applications they have in front of them. I buy the correct 308 bearing from Akron Bearing and they have them in stock. I run a 307 bearing HEMI box in my Savoy and it's working just fine. I would prefer a sealed bearing in my transmissions because the chunks of brass and metal floating around in the gear oil is the reason these bearing fail. My next transmission will probably have sealed bearings in it Gus Which is better for a race application, 307 or 308 case? I've broke 3 A833's with the 308 so far, sheared all the teeth off third gear on the cluster all three times and they didn't have many miles on them so the bearings were not worn?

Re: 308 bearing on a 4 speed - different sizes? [Re: fourgearsavoy] #2443306 01/30/18 11:26 AM 01/30/18 11:26 AM
Joined: Jan 2003 Posts: 10,714 North Dakota 6PakBee I Live Here
6PakBee I Live Here Joined: Jan 2003 Posts: 10,714 North Dakota	Originally Posted By fourgearsavoy ...I buy the correct 308 bearing from Akron Bearing and they have them in stock.... I just finished an email exchange with Steve Kalgreen from Akron Bearing Co. I asked for a 308 SG8 bearing with the 0.825" race width and he had no idea what I was talking about. "We live in a time when intelligent people are being silenced so that stupid people won't be offended".

Re: 308 bearing on a 4 speed - different sizes? [Re: moparpoolman] #2443308 01/30/18 11:27 AM 01/30/18 11:27 AM
Joined: Jan 2003 Posts: 10,714 North Dakota 6PakBee I Live Here
6PakBee I Live Here Joined: Jan 2003 Posts: 10,714 North Dakota	Originally Posted By moparpoolman Which is better for a race application, 307 or 308 case? I've broke 3 A833's with the 308 so far, sheared all the teeth off third gear on the cluster all three times and they didn't have many miles on them so the bearings were not worn? Sounds like a shifter adjustment concern to me. "We live in a time when intelligent people are being silenced so that stupid people won't be offended".

Re: 308 bearing on a 4 speed - different sizes? [Re: 6PakBee] #2443864 01/31/18 02:25 AM 01/31/18 02:25 AM
Joined: Jan 2003 Posts: 1,908 Nebraska 4 4406bbl top fuel
4406bbl top fuel 4 Joined: Jan 2003 Posts: 1,908 Nebraska	Originally Posted By 6PakBee Originally Posted By fourgearsavoy ...I buy the correct 308 bearing from Akron Bearing and they have them in stock.... I just finished an email exchange with Steve Kalgreen from Akron Bearing Co. I asked for a 308 SG8 bearing with the 0.825" race width and he had no idea what I was talking about. Same story here, my local only had 308l.

Re: 308 bearing on a 4 speed - different sizes? [Re: 6PakBee] #2444235 01/31/18 09:13 PM 01/31/18 09:13 PM
Joined: Dec 2004 Posts: 10,553 Rittman Ohio fourgearsavoy I Live Here
fourgearsavoy I Live Here Joined: Dec 2004 Posts: 10,553 Rittman Ohio	Originally Posted By 6PakBee Originally Posted By fourgearsavoy ...I buy the correct 308 bearing from Akron Bearing and they have them in stock.... I just finished an email exchange with Steve Kalgreen from Akron Bearing Co. I asked for a 308 SG8 bearing with the 0.825" race width and he had no idea what I was talking about. Last fall I walked in with the bearing in my hand and The girl behind the counter just whipped out her calipers and made some measurements and got me the correct bearing. Gus 64 Plymouth Savoy 493 Indy EZ's by Nick at Compu-Flow 5-Speed Richmond faceplate Liberty box Dana 60

Re: 308 bearing on a 4 speed - different sizes? [Re: 6PakBee] #2444355 01/31/18 11:40 PM 01/31/18 11:40 PM
Joined: Aug 2003 Posts: 8,779 Mt.Gilead, Ohio OhioMopar master
OhioMopar master Joined: Aug 2003 Posts: 8,779 Mt.Gilead, Ohio	Originally Posted By 6PakBee Originally Posted By moparpoolman Which is better for a race application, 307 or 308 case? I've broke 3 A833's with the 308 so far, sheared all the teeth off third gear on the cluster all three times and they didn't have many miles on them so the bearings were not worn? Sounds like a shifter adjustment concern to me. Third gear is the one to go when you have traction, weight and power. If he's driving it hard and hooking, 3rd gear will have a short life.

Re: 308 bearing on a 4 speed - different sizes? [Re: OhioMopar] #2919067 05/05/21 08:57 PM 05/05/21 08:57 PM
Joined: Jan 2003 Posts: 1,893 Harriman NY 7 71GTX471 top fuel
71GTX471 top fuel 7 Joined: Jan 2003 Posts: 1,893 Harriman NY	Exactly how many balls in the 308-SG8 bearing & what is the retainer made of steel or nylon.

Re: 308 bearing on a 4 speed - different sizes? [Re: 71GTX471] #2919137 05/05/21 11:46 PM 05/05/21 11:46 PM
Joined: Jun 2014 Posts: 1,323 VA D dragon slayer pro stock
dragon slayer pro stock D Joined: Jun 2014 Posts: 1,323 VA	Funny this popped back up, I was cleaning up some bearing and noticed that one was MRC 308 SG10 all engraved markings and one was typical stamped MRC 308-SG10, but the 10 was crossed out and marked 8 via an engraver. So what is the difference between SG8 and SG10? Also trying to understand how these bearing widths effect the wear on the cluster with the bearing retainer and selective snap ring.

Re: 308 bearing on a 4 speed - different sizes? [Re: dragon slayer] #2919738 05/07/21 06:07 PM 05/07/21 06:07 PM
Joined: Dec 2014 Posts: 5,815 ohio R ruderunner master
ruderunner master R Joined: Dec 2014 Posts: 5,815 ohio	What are the correct dimensions for this bearing? ID OD WIDTH? Perhaps most importantly, distance from the snap ring to the surface that the input shaft mates to. I'm thinking that with the right spacers or shims a standard 308 can work. Alternatively, I might be able to source a suitable bearing, we deal with lots of them at work, including some proprietary ones. Last edited by ruderunner; 05/07/21 06:09 PM. Angry white pureblood male

Re: 308 bearing on a 4 speed - different sizes? [Re: ruderunner] #2919901 05/08/21 08:57 AM 05/08/21 08:57 AM
Joined: Jun 2014 Posts: 1,323 VA D dragon slayer pro stock
dragon slayer pro stock D Joined: Jun 2014 Posts: 1,323 VA	I think it has become somewhat moot since Brewers and Passion have originals and also aftermarket in correct size. Since the output and input shaft machining stayed the same the width is the same as the MRC307 with snap ring groove at .8268" and 1.3780" Bore. When MOPAR went to the larger 308 bearing they had to retain same bore and width with just increased OD. So it is a custom bearing by MRC originally. I have seen original 308 bearings in a Ford version at .79x" wide, the standard bearing at .905 wide, and the Mopar .827. Also, to answer the previous ? 8 bearings in steel cage as original. I have seen 307 aftermarket with a nylon cage.

Re: 308 bearing on a 4 speed - different sizes? [Re: dragon slayer] #2920512 05/09/21 07:06 PM 05/09/21 07:06 PM
Joined: Dec 2014 Posts: 5,815 ohio R ruderunner master
ruderunner master R Joined: Dec 2014 Posts: 5,815 ohio	Ok, that's a very confusing way to answer a simple question. So for clarification... ID. 1.378 Width. 827 OD, whatever is standard for a 308 bearing? Does anyone have a dimension for the inboard race to outboard snap ring dimension? Angry white pureblood male

Re: 308 bearing on a 4 speed - different sizes? [Re: ruderunner] #2920554 05/09/21 08:54 PM 05/09/21 08:54 PM
Joined: Jun 2014 Posts: 1,323 VA D dragon slayer pro stock
dragon slayer pro stock D Joined: Jun 2014 Posts: 1,323 VA	OD is 90mm. For SG, Go look it up it is in the 307 or 308 spec from MRC or SKF. I was just trying to clarify why it is a special 308. It matches the 307 except for OD. In my opinion this is not something you want to start shimming. Use the correct bearing and selective snap ring. Last edited by dragon slayer; 05/09/21 08:55 PM.

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