What constitutes a groove? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

My70C10 · 08-07-2007, 06:09 PM

I have attached a pic of a saginaw 3 speed replacement transmission going into my son's 1970 C-10 stepside. I've found all the sites that talk about grooves on the input shaft. I'm trying to determine if this is wear on the front bearing retainer or are these markings the allusive grooves mentioned in other tranny id articles. No one has ever posted a pic of a one groove, 2 groove, 3 groove, etc. trans so I don't know what to look for.

Thanks.

68gmsee · 08-07-2007, 06:16 PM

http://www.mrracingequipment.com/M&R...%20Trannys.htm

Scroll down until you see the input shaft.. I don't know if all saginaws have the grooves though. I don't remember if mine had them but then I don't think I even looked...

My70C10 · 08-07-2007, 06:25 PM

Thanks 68gmsee...I appreciate the info...now if I could get confirmation that what I'm seeing on the front bearing retainer is normal or excessive wear. The difference between the snout diameter and the what looks like worn area is about 1/100 of an inch and does not go completely around the diameter of the front bearing retainer. I do have the option of swapping the one from the previous transmission if this is excessive wear.

Thanks.

PanelDeland · 08-07-2007, 06:56 PM

Looks like wear from the throw out bearing to me.However I'm not an expert and I have no idea how much is too much.
This should TTT for you and maybe someone with real knowledge will give you better info.

68gmsee · 08-07-2007, 07:11 PM

Re: throw out bearing. That's what I was thinking also.. I suspect the problem would be occasional sticking of the clutch. More than likely someone drove it with a bad throw out bearing and it was spinning on the shaft.

I'd go visit some junkyards. Take the part with you to make sure you get the right one.

Kurt L · 08-07-2007, 07:11 PM

yup yup i agree panel

My70C10 · 08-07-2007, 07:48 PM

I appreciate the info folks...I'll see what I can do about replacine the front bearing retainer...thanks again.

08-07-2007, 06:16 PM	#2
68gmsee Active Member Join Date: Jul 2007 Location: Centrally located between Houston, Austin and Waco. BCS area. Posts: 7,947	Re: What constitutes a groove? http://www.mrracingequipment.com/M&R...%20Trannys.htm Scroll down until you see the input shaft.. I don't know if all saginaws have the grooves though. I don't remember if mine had them but then I don't think I even looked...

08-07-2007, 06:25 PM	#3
My70C10 Registered User Join Date: Feb 2007 Location: Cedar Park, TX Posts: 20	Re: What constitutes a groove? Thanks 68gmsee...I appreciate the info...now if I could get confirmation that what I'm seeing on the front bearing retainer is normal or excessive wear. The difference between the snout diameter and the what looks like worn area is about 1/100 of an inch and does not go completely around the diameter of the front bearing retainer. I do have the option of swapping the one from the previous transmission if this is excessive wear. Thanks.

08-07-2007, 06:56 PM	#4
PanelDeland I am a Referee of life. Join Date: Jun 2000 Location: Greensboro N.C. Posts: 13,992	Re: What constitutes a groove? Looks like wear from the throw out bearing to me.However I'm not an expert and I have no idea how much is too much. This should TTT for you and maybe someone with real knowledge will give you better info. __________________ The 47-present Chevrolet and GMC Truck Message Board Network,it's owners,moderators,members,and associates of any type should not be held responsible for my opinion. You can't fix stupid,not even with duct tape. "My appearance is due to the fact that "GOD" does punish you for having too much fun!" Barrett-Jackson has perfected alchemy,they make rust into gold! "You can lead a horse to water but you can't saddle a duck" "Cleverly disguised as a 'Responsible Adult' "Sometimes your Knight in shining armor is just a retard in tinfoil"

08-07-2007, 07:11 PM	#5
68gmsee Active Member Join Date: Jul 2007 Location: Centrally located between Houston, Austin and Waco. BCS area. Posts: 7,947	Re: What constitutes a groove? Re: throw out bearing. That's what I was thinking also.. I suspect the problem would be occasional sticking of the clutch. More than likely someone drove it with a bad throw out bearing and it was spinning on the shaft. I'd go visit some junkyards. Take the part with you to make sure you get the right one.

08-07-2007, 07:11 PM	#6
Kurt L Senior Member Join Date: May 2003 Location: ne florida Posts: 2,665	Re: What constitutes a groove? yup yup i agree panel

08-07-2007, 07:48 PM	#7
My70C10 Registered User Join Date: Feb 2007 Location: Cedar Park, TX Posts: 20	Re: What constitutes a groove? I appreciate the info folks...I'll see what I can do about replacine the front bearing retainer...thanks again.



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