Corvair DiagramCorvair Photo
Corvair Center
home forum corvairs calendar links Corvair Podcast
California Corvairs
Clarks Corvair
Clarks Corvair
“Performance
“CORSA"



Chevy Corvair License Plate
Chevy Corvair Chrome Wheel
Corvair Center Forum :  Corvair Center Phorum The fastest message board... ever.
Corvair Center 
Pages: 12Next
Current Page: 1 of 2
WTB: set of 3849964 3-4 blocker rings
Posted by: toms73novass ()
Date: December 27, 2017 10:56AM

Looking for 2 part# 3849964 3-4 blocker rings for 1964 four speed

Thanks
Tom

PS. Davemotohead does not have them.

needpart

-Tom


63' Monza Spyder Convertable (in process) MY Build Thread
73' NovaSS 454 Big block
86' BMW 325es
98' Dodge 2500 12v Cummins Diesel with 1200 lb torque!
98' VW Jetta TDI, for daughter
01' Audi Allroad Stage 3 twin turbo

NFCC
Grand Island, NY



Edited 1 time(s). Last edit at 12/27/2017 11:01AM by MattNall.

Options: ReplyQuote
Re: WTB: set of 3849964 3-4 blocker rings
Posted by: irfgt ()
Date: December 27, 2017 12:09PM

Clarks has them, Just bought a set.

Options: ReplyQuote
Re: WTB: set of 3849964 3-4 blocker rings
Posted by: toms73novass ()
Date: December 27, 2017 12:12PM

I want OEM, there have been known issues with the repops.

-Tom


63' Monza Spyder Convertable (in process) MY Build Thread
73' NovaSS 454 Big block
86' BMW 325es
98' Dodge 2500 12v Cummins Diesel with 1200 lb torque!
98' VW Jetta TDI, for daughter
01' Audi Allroad Stage 3 twin turbo

NFCC
Grand Island, NY

Options: ReplyQuote
Re: WTB: set of 3849964 3-4 blocker rings
Posted by: irfgt ()
Date: December 27, 2017 01:04PM

toms73novass Wrote:
-------------------------------------------------------
> I want OEM, there have been known issues with the
> repops.


What kind of problems?

Options: ReplyQuote
Re: WTB: set of 3849964 3-4 blocker rings
Posted by: toms73novass ()
Date: December 27, 2017 01:14PM

longevity and another person mentioned the angle on them is not quite what they should be compared to stock so they do not get a full purchase on the shaft.

But don't you have a 62 trans? They are not the same as 64-65.

-Tom


63' Monza Spyder Convertable (in process) MY Build Thread
73' NovaSS 454 Big block
86' BMW 325es
98' Dodge 2500 12v Cummins Diesel with 1200 lb torque!
98' VW Jetta TDI, for daughter
01' Audi Allroad Stage 3 twin turbo

NFCC
Grand Island, NY



Edited 2 time(s). Last edit at 12/27/2017 01:17PM by toms73novass.

Options: ReplyQuote
Re: WTB: set of 3849964 3-4 blocker rings
Posted by: irfgt ()
Date: December 27, 2017 01:29PM

toms73novass Wrote:
-------------------------------------------------------
> longevity and another person mentioned the angle
> on them is not quite what they should be compared
> to stock so they do not get a full purchase on the
> shaft.
>
> But don't you have a 62 trans? They are not the
> same as 64-65.


I know they are different, are the issues just with the 64-65? Thank you.

Options: ReplyQuote
Re: WTB: set of 3849964 3-4 blocker rings
Posted by: Seth Emerson ()
Date: December 27, 2017 02:52PM

Tom - I have a pair of blocker rings (NOS) from many years ago. I believe they are for the 64-65 4-speed. Do you have the dimensions to check? I hoped that they were for the 66-up trans, but they are not. I measured them at one time, and a knowledgeable source said no, not for the 66.

Seth Emerson

Check my new Performance Corvair Web site [www.perfvair.com]

Options: ReplyQuote
Re: WTB: set of 3849964 3-4 blocker rings
Posted by: toms73novass ()
Date: December 27, 2017 03:38PM

At the moment I have not taken it all apart so I do not have a dimension yet. I might have a chance this weekend to get it apart. Hopefully what you have is what I need.

-Tom


63' Monza Spyder Convertable (in process) MY Build Thread
73' NovaSS 454 Big block
86' BMW 325es
98' Dodge 2500 12v Cummins Diesel with 1200 lb torque!
98' VW Jetta TDI, for daughter
01' Audi Allroad Stage 3 twin turbo

NFCC
Grand Island, NY

Options: ReplyQuote
Re: WTB: set of 3849964 3-4 blocker rings
Posted by: toms73novass ()
Date: December 27, 2017 03:39PM

irfgt Wrote:
-------------------------------------------------------
> toms73novass Wrote:
> --------------------------------------------------
> -----
> > longevity and another person mentioned the
> angle
> > on them is not quite what they should be
> compared
> > to stock so they do not get a full purchase on
> the
> > shaft.
> >
> > But don't you have a 62 trans? They are not
> the
> > same as 64-65.
>
>
> I know they are different, are the issues just
> with the 64-65? Thank you.


The only feedback I have gotten about the rings has been for the 64-5.

-Tom


63' Monza Spyder Convertable (in process) MY Build Thread
73' NovaSS 454 Big block
86' BMW 325es
98' Dodge 2500 12v Cummins Diesel with 1200 lb torque!
98' VW Jetta TDI, for daughter
01' Audi Allroad Stage 3 twin turbo

NFCC
Grand Island, NY

Options: ReplyQuote
Re: WTB: set of 3849964 3-4 blocker rings
Posted by: steve c goodman ()
Date: December 27, 2017 03:59PM

64-5 brass height:

1-2+ .488"

3-4= .4315"

64-5 has a lightly machined ring around outer
diameter----61-63 does NOT

Hope this helps.

best wishes, Steve
Rear Engine Spec. Inc. Golden, Colo.

1962 spyder 3.0L turbo 1965 Crown V8
1967 monza 110/4 1968 monza 110/4
1971 amante gt 110/4
CORSA/RMC/PPCC

Options: ReplyQuote
Re: WTB: set of 3849964 3-4 blocker rings
Posted by: Seth Emerson ()
Date: December 27, 2017 04:12PM

You know, Steve - You sent me all this same info months ago, you knowledgeable source, you. I looked for 10 minutes before giving up and asking again. Thanks! I will go re-measure them, if I can find them!

Seth Emerson

Check my new Performance Corvair Web site [www.perfvair.com]

Options: ReplyQuote
Re: WTB: set of 3849964 3-4 blocker rings
Posted by: Seth Emerson ()
Date: December 27, 2017 04:28PM

These two, new, rings are identical and measure .480 high. I don't see a "lightly machined ring around the outer" - Does that make these 63 style?

Seth Emerson

Check my new Performance Corvair Web site [www.perfvair.com]

Attachments:

Options: ReplyQuote
Re: WTB: set of 3849964 3-4 blocker rings
Posted by: v8vair ()
Date: December 27, 2017 04:39PM

If you lap the new rings to each cone and pay attention to the height of the ring on the cone the Clarks rings work fine.I like to see them sit .040 -.050 high though ive seen them work good with much less. Mike

Options: ReplyQuote
Re: WTB: set of 3849964 3-4 blocker rings
Posted by: toms73novass ()
Date: December 27, 2017 04:52PM

Seth- I believe that there is suppose to be a ring, but not sure.

Mike - Thanks for the tip.

-Tom


63' Monza Spyder Convertable (in process) MY Build Thread
73' NovaSS 454 Big block
86' BMW 325es
98' Dodge 2500 12v Cummins Diesel with 1200 lb torque!
98' VW Jetta TDI, for daughter
01' Audi Allroad Stage 3 twin turbo

NFCC
Grand Island, NY

Options: ReplyQuote
Re: WTB: set of 3849964 3-4 blocker rings
Posted by: caroseiii ()
Date: December 27, 2017 06:57PM

Clarks Mark and I talked about this but they have not had complaints but Dennis Derogi and I had the same problem where the gears would brake and lock up hence the keys clashed. I think it is due to the wrong cone angle. It really is critical and you can find his frustrating experiences in the archive of Dennis’ Sagan convertible restoration. If there is no band cut into the side of the blocker ring do not install it. You are better off with used. Often new gears work fine with used blockers. Used blockers on used gears have to be able to grip with gear oil on them but release easily when pulled straight off. The Clark 64-65 3/4 blocker repro really appears to be 61-63 blocker ring but I have not compared their angles side by side. There ought to to be more research.

Crawford Rose

Options: ReplyQuote
Re: WTB: set of 3849964 3-4 blocker rings
Posted by: v8vair ()
Date: December 27, 2017 07:31PM

Lapping the blocker rings to the cone is not an uncommon practice for this issue.A little blueing on even an GM ring will show how bad the contact can be. If the 3 slots on the ring are not not wide enough they will dead center the teeth of the gear and syncro causing a no shift, the ring must go from one side to the other on the up and down shift. Alot going on here but all can be corrected with a little work. Mike

Options: ReplyQuote
Re: WTB: set of 3849964 3-4 blocker rings
Posted by: Seth Emerson ()
Date: December 27, 2017 10:56PM

So., Mike what are the two rings in the photo? Can you tell? I can send them to you if that would help.

Seth Emerson

Check my new Performance Corvair Web site [www.perfvair.com]

Options: ReplyQuote
Re: WTB: set of 3849964 3-4 blocker rings
Posted by: irfgt ()
Date: December 28, 2017 04:48AM

This is a big concern to me having a transmission on my work bench almost completely reassembled and ready to go back in the vehicle and reading there are potential problems with recently purchased parts. If I am going to have to custom fit parts in order for them to function properly then there should be a warning included with the parts warning of this situation. It takes many hours of labor to replace blocker rings.

Options: ReplyQuote
Re: WTB: set of 3849964 3-4 blocker rings
Posted by: vairmech ()
Date: December 28, 2017 05:40AM

The 61-3 blocker rings have exactly the same dimensions as the 64-5 blocker rings! The ONLY difference is the cone angle and it is not much! It is not visible to the naked eye. Going on memory and we all know how that can go I think the early has a 7 degree cone angle and the 64-5 has a 10 degree cone angle.
I will go measure the angle and get back here.

Ken Hand
Handy Car Care
248 613 8586

Vairmech@aol.com

Options: ReplyQuote
Re: WTB: set of 3849964 3-4 blocker rings
Posted by: v8vair ()
Date: December 28, 2017 06:14AM

An early trans I built for Russ Thulen had this issue going into third gear,after a few (many 100 ) miles the ring seated to the cone and it was/is fine. Since then ive been checking the contact with a little more concern smiling smiley
I dont know Seth, I dont do enough of the earlys to recognize them.

Options: ReplyQuote
Pages: 12Next
Current Page: 1 of 2


Sorry, only registered users may post in this forum.
This forum powered by Phorum.