Re: Throw Out Bearing and a Over Drive Transmission
[Re: Cajun]
#988779
05/09/11 12:26 PM
05/09/11 12:26 PM
|
Joined: Jul 2004
Posts: 1,101
Retired now in Tennessee
Chi_Town_Runner
super stock
|
super stock
Joined: Jul 2004
Posts: 1,101
Retired now in Tennessee
|
I'm in the process of changing my original A-833 from my '68 RR to a 1980 OD/A-833. The bearing retainer on my original trans was 1.25" around the input shaft. The O/D trans original bearing retainer was also 1.25 around the input shaft.. I did have to machine the bearing retainer base down to the 4.80 size to fit the bellhousing but the collar on the retainer that the throw-out bearing rides on was the same. Not sure what your 1.421 bearing retainer is from. Another solution would be a new bearing retainer, but check the diameter of your input shaft also. Hope this helps. Frank  EDIT: I re-read your original post and see that you did measure the input shaft 1.25. My input shaft(s) the O/D and the 4-speed are both .997. Not sure if you have an A-833 ?
Last edited by Chi_Town_Runner; 05/09/11 12:52 PM.
Remember - 2 wrongs don't make a right - but 3 rights make a left!
|
|
|
Re: Throw Out Bearing and a Over Drive Transmission
[Re: Cajun]
#988780
05/09/11 02:03 PM
05/09/11 02:03 PM
|
Joined: Jul 2010
Posts: 14
Texas
Cajun
OP
member
|
OP
member
Joined: Jul 2010
Posts: 14
Texas
|
I was told the OD Trans came out of a late 70’s Chrysler. I have the original 4 speed and the area where the throw out bearing sits is 1.421 OD. The OD Trans measures 1.25 where the throw out bearing sits. I have information on these “at my house of course” where it shows Chrysler using both these sizes in different vehicles. My research also shows where this is a common swap , but nothing on the difference in sizes of throw out bearing . All I know is I am learning more about throw out bearings and A833 transmission's than my brain can handle. 
|
|
|
Re: Throw Out Bearing and a Over Drive Transmission
[Re: JohnRR]
#988781
05/09/11 02:34 PM
05/09/11 02:34 PM
|
Joined: Jan 2003
Posts: 21,076
Niles , Ohio
therocks
oh wait.but hey.lets see.oh yeah.
|
oh wait.but hey.lets see.oh yeah.
Joined: Jan 2003
Posts: 21,076
Niles , Ohio
|
My sons 80 truck has OD trans.We installed the CF setup in it.It fit no problem.Did you get a hemi bearing?I know when I put the CF in my 65 they gave me the wrong bearing.Had to get one for a 23 spline.Rocky
Chrysler Firepower
|
|
|
Re: Throw Out Bearing and a Over Drive Transmission
[Re: Cajun]
#988782
05/09/11 05:37 PM
05/09/11 05:37 PM
|
Joined: Jul 2004
Posts: 1,101
Retired now in Tennessee
Chi_Town_Runner
super stock
|
super stock
Joined: Jul 2004
Posts: 1,101
Retired now in Tennessee
|
Keith,
Rocky may be on point on this.
You said you have the orig trans. Count the # of splines on the input shaft. The OD trans is a 23 spline input shaft. If you car was originally a Hemi or 440 car then you would have an 18 spline input shaft.
I was not aware that the 18 spline was larger but you learn something new every day.
BTW, if it is an 18 spline orig trans your goining to have to get a new clutch disc for the 23 spline trans.
Let us know.
Frank
Remember - 2 wrongs don't make a right - but 3 rights make a left!
|
|
|
Re: Throw Out Bearing and a Over Drive Transmission
[Re: Chi_Town_Runner]
#988783
05/09/11 05:41 PM
05/09/11 05:41 PM
|
Joined: Jan 2003
Posts: 75,058
U.S.S.A.
JohnRR
I Win
|
I Win
Joined: Jan 2003
Posts: 75,058
U.S.S.A.
|
Quote:
Keith,
Rocky may be on point on this.
You said you have the orig trans. Count the # of splines on the input shaft. The OD trans is a 23 spline input shaft. If you car was originally a Hemi or 440 car then you would have an 18 spline input shaft.
I was not aware that the 18 spline was larger but you learn something new every day.
Let us know.
Frank
Yes it is the input shaft on the hemi I think is 1.125 vs the 23 spline which is 1.00 so the OD of the bearing retainer is going to be proportionally larger.
|
|
|
Re: Throw Out Bearing and a Over Drive Transmission
[Re: Cajun]
#988785
05/09/11 05:46 PM
05/09/11 05:46 PM
|
Joined: Jan 2003
Posts: 75,058
U.S.S.A.
JohnRR
I Win
|
I Win
Joined: Jan 2003
Posts: 75,058
U.S.S.A.
|
Quote:
The transmission I have here "at my shop" is a 23 spline. Which is the original "I am told" that came out of the car. I do not know what the OD transmission is. Is there any way to know without pulling it?
Thanks
Keith
There is a raised pad on the passenger side of the trans with info stamped on it , post that info.
But it sounds like you already know you need the smaller TO bearing , just get it and be done .
|
|
|
Re: Throw Out Bearing and a Over Drive Transmission
[Re: Cajun]
#988788
05/10/11 12:00 PM
05/10/11 12:00 PM
|
Joined: Jul 2010
Posts: 14
Texas
Cajun
OP
member
|
OP
member
Joined: Jul 2010
Posts: 14
Texas
|
Sorry guys , my in house service tech measured the transmission I have here "which is the original" wrong. It is a 23 spline 1.248 shaft. My research shows the A833 trans "big block" having a 1.248 shaft and the OD A833 as having a 1.248 shaft. The car is at my mechanic , who I fully trust but is not a MOPAR guy. I am going over to his shop this afternoon and look/measure/count the shaft myself. And also get any markings I can off of that transmission. Because something is not adding up here. Oh a side note, I contacted the guy I bought the car from "about three years ago". He informed me he was not sure what the transmission came off of. AAAUUUGGGHHHHH But it has been doing fine all this time, so I can only ASSUME it is a Chrysler transmission. It is definitely a OD Transmission. The minute I get all the FACT'S I will post accordingly. Just spoke with my mechanic , and he spoke with Center Force. He gave them all the measurements IE: shaft size, bearing, retainer etc. And is waiting for a call back from them. Thanks for all your help and effort in this matter. Keith
|
|
|
Re: Throw Out Bearing and a Over Drive Transmission
[Re: Cajun]
#988789
05/10/11 01:11 PM
05/10/11 01:11 PM
|
Joined: Jul 2004
Posts: 1,101
Retired now in Tennessee
Chi_Town_Runner
super stock
|
super stock
Joined: Jul 2004
Posts: 1,101
Retired now in Tennessee
|
Keith, After some searching I found a photo of the 2 shafts (23 spline vs. 18 spline) to give you some reference. [image]  [/image] JohnRR was correct (as usual) about the different diameters of input shafts. Once you get the #s you'll know exactly what you have. BTW, Thanks from me to JohnRR for the input. Frank
Remember - 2 wrongs don't make a right - but 3 rights make a left!
|
|
|
Re: Throw Out Bearing and a Over Drive Transmission
[Re: Cajun]
#988790
05/10/11 01:55 PM
05/10/11 01:55 PM
|
Joined: Jan 2003
Posts: 2,734
Charlotte, NC
446acuda
master
|
master
Joined: Jan 2003
Posts: 2,734
Charlotte, NC
|
Quote:
The problem with the smaller T.O. bearing is , it has smaller OD. So when it is on, the fork is barely making contact with it. The larger T.O bearing makes good contact with the fork. But is loose on the shaft.
Keith
I'm not sure that I totally understand what is going on but it sounds like the extra slop is allowing good fork contact which would mean you have the wrong fork pivot bracket.
|
|
|
Re: Throw Out Bearing and a Over Drive Transmission
[Re: Cajun]
#988791
05/10/11 02:37 PM
05/10/11 02:37 PM
|
Joined: Jan 2003
Posts: 75,058
U.S.S.A.
JohnRR
I Win
|
I Win
Joined: Jan 2003
Posts: 75,058
U.S.S.A.
|
Quote:
Sorry guys , my in house service tech measured the transmission I have here "which is the original" wrong. It is a 23 spline 1.248 shaft.
My research shows the A833 trans "big block" having a 1.248 shaft and the OD A833 as having a 1.248 shaft.
The car is at my mechanic , who I fully trust but is not a MOPAR guy. I am going over to his shop this afternoon and look/measure/count the shaft myself. And also get any markings I can off of that transmission.
Because something is not adding up here.
Oh a side note, I contacted the guy I bought the car from "about three years ago". He informed me he was not sure what the transmission came off of. AAAUUUGGGHHHHH
But it has been doing fine all this time, so I can only ASSUME it is a Chrysler transmission. It is definitely a OD Transmission.
The minute I get all the FACT'S I will post accordingly.
Just spoke with my mechanic , and he spoke with Center Force. He gave them all the measurements IE: shaft size, bearing, retainer etc. And is waiting for a call back from them.
Thanks for all your help and effort in this matter.
Keith
I think what you are going to find out is centerforce sent you the wrong throwout bearing , they sent a TO for a Hemi trans , not the 23 spline/OD trans.
|
|
|
|
|
