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A-833 4 speed Input shaft bearing #1005093 06/02/11 09:13 AM 06/02/11 09:13 AM
Joined: Feb 2007 Posts: 1,687 Boston, MA C crocha617 OP top fuel
crocha617 OP top fuel C Joined: Feb 2007 Posts: 1,687 Boston, MA	How difficult is it to change the input shaft bearing on a 1970 a-844 trans I've never taken one apart before? This trans was in a friends car and he said it worked and shifted perfectly but was starting to hum in front and he recommended I put an input shaft bearing in it before I install it in my car. I am pretty mechanical and am sure I can do it but I'm just wondering if the whole thing needs to come apart or is it as simple as just removing the front bearing retainer? Or should I just drop it off and have completely gone through by a reputable shop? What's the going rate for a complete overhaul these days?

Re: A-833 4 speed Input shaft bearing [Re: crocha617] #1005094 06/02/11 09:23 AM 06/02/11 09:23 AM
Joined: Jan 2003 Posts: 74,948 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 74,948 U.S.S.A.	The bearing can be replaced without complete disassembly , I did it many moons ago , BUT since it's out of the car I would have it gone thru , my experience it's usually the rear bearing that gets more beat up than the front .

Re: A-833 4 speed Input shaft bearing [Re: JohnRR] #1005095 06/02/11 10:20 AM 06/02/11 10:20 AM
Joined: Oct 2005 Posts: 8,853 Ontario, Canada S Stanton Don't question me!
Stanton Don't question me! S Joined: Oct 2005 Posts: 8,853 Ontario, Canada	The bearing doesn't come out from the front unless you have an 18 spline trans. Assuming you don't, you have to pull off the side cover, pull out the tailstock and pull the mainshaft and let the cluster drop to the bottom of the case. You also have to remove the front bearing retainer so you can remove the snapring. You'll need a complete gasket kit. If you're mechanically inclined then a complete rebuild is a piece of cake once you have all the parts "in hand" but you do need a special snapring tool (Sears). The toughest part of the job is installing the tailstock bushing - best taking it to a tranny shop and slipping the guy $5 !!

Re: A-833 4 speed Input shaft bearing [Re: Stanton] #1005096 06/02/11 10:43 AM 06/02/11 10:43 AM
Joined: Jan 2003 Posts: 74,948 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 74,948 U.S.S.A.	Quote: The bearing doesn't come out from the front unless you have an 18 spline trans. HUH ??? if pulling the input shaft AND it's a 23 spline then yes one would have to take the trans apart, but since the front part of the bearing sticks out the front of the case your statement is incorrect because the bearing is already poking out the front of the case. Maybe it's the the fact that the input shaft won't come out the front on a 23 spline that I was able to pull the bearing off without disassembling the trans, I popped off the snap rings and used 2 screw drivers against the case and was able to pull off the bearing. You'd be amazed what a 17yr old with a set of tools and a natural mechanical aptitude can do.

Re: A-833 4 speed Input shaft bearing [Re: JohnRR] #1005097 06/02/11 12:32 PM 06/02/11 12:32 PM
Joined: Jan 2003 Posts: 4,285 Ohio 6 64dodge572 master
64dodge572 master 6 Joined: Jan 2003 Posts: 4,285 Ohio	Take it apart and fix it right. Regardless of 23 or 18 spline, the input shaft will not come out the front without dropping the cluster. Dan Brewers Performance Inc. 4-speed transmission and parts specialists PH 937-947-4416 or 937-698-4259 FAX 937-947-4419 www.brewersperformance.com

Re: A-833 4 speed Input shaft bearing [Re: 64dodge572] #1005098 06/02/11 02:13 PM 06/02/11 02:13 PM
Joined: Feb 2007 Posts: 1,687 Boston, MA C crocha617 OP top fuel
crocha617 OP top fuel C Joined: Feb 2007 Posts: 1,687 Boston, MA	It's a 23 spline and all I want to do is change the input shaft bearing. I was hoping to confirm if I could just unbolt the front bearing retainer and switch the bearing out. The trans works great and shifts perfectly. I'm trying to get the car running for the summer and didn't want to send it out for a total rebuild that could take weeks.Thanks.

Re: A-833 4 speed Input shaft bearing [Re: crocha617] #1005099 06/02/11 08:15 PM 06/02/11 08:15 PM
Joined: Oct 2005 Posts: 8,853 Ontario, Canada S Stanton Don't question me!
Stanton Don't question me! S Joined: Oct 2005 Posts: 8,853 Ontario, Canada	Quote: I was hoping to confirm if I could just unbolt the front bearing retainer and switch the bearing out. According to everybody ... NO. According to John-boy, yes - but then he tends to condradict everyone. Who you want to believe is up to you. Personally, and I've done a few and I've NEVER had an input bearing come off the shaft (or go on again) without significant effort. If I ever had one slip on or off with as little effort as John's did I think I'd throw the shaft away.

Re: A-833 4 speed Input shaft bearing [Re: Stanton] #1005100 06/02/11 08:31 PM 06/02/11 08:31 PM
Joined: May 2005 Posts: 6,446 NJ-USA H HPMike master
HPMike master H Joined: May 2005 Posts: 6,446 NJ-USA	John is correct here. It can be done-no sweat. 18 or 23 spline-doesn't matter. Here is how. -Take the bearing retainer off. -take the external and internal snap rings off. -wedge two prybars against the case and pry by way of the external groove. -while you have it "loaded" with the prybars(pulled slightly away from the case) have an assistant tap on the pilot end of the input shaft rearward with a brass hammer. keep the pressure on the bars while tapping continuously. Don't worry, it won't take too much tapping effort. Bearing comes off. -Install is easy. If you have the ability to warm the bearing, do it, but not necessary. Place the bearing on the shaft and using a blunt nosed drift punch tap around at the inner race of the bearing until its seated. -Install snap rings and retainer and you are done. MB

Re: A-833 4 speed Input shaft bearing [Re: Stanton] #1005101 06/02/11 08:35 PM 06/02/11 08:35 PM
Joined: Dec 2004 Posts: 10,551 Rittman Ohio fourgearsavoy I Live Here
fourgearsavoy I Live Here Joined: Dec 2004 Posts: 10,551 Rittman Ohio	I can be done John's way but it will require some finesse with an air chisel with a blunt rounded tip.Hard to describe the backyard way but it's still doubtful that it ONLY needs an input bearing Gus 6664100-burnoutpicturegus.JPG (116 downloads) 64 Plymouth Savoy 493 Indy EZ's by Nick at Compu-Flow 5-Speed Richmond faceplate Liberty box Dana 60

Re: A-833 4 speed Input shaft bearing [Re: JohnRR] #1005102 06/02/11 08:37 PM 06/02/11 08:37 PM
Joined: Jul 2007 Posts: 11,836 Florida M mopar346 Let me tell ya about fat chicks!
mopar346 Let me tell ya about fat chicks! M Joined: Jul 2007 Posts: 11,836 Florida	You'd be amazed what a 17yr old with a set of tools and a natural mechanical aptitude can do. You forgot the part about, we didn't know you couldn't/shouldn't do it that way so we just did. Ahhh the good old days. Careful, your character's showing!

Re: A-833 4 speed Input shaft bearing [Re: 64dodge572] #1005103 06/02/11 09:17 PM 06/02/11 09:17 PM
Joined: May 2006 Posts: 2,046 ky. K kenworth_goose top fuel
kenworth_goose top fuel K Joined: May 2006 Posts: 2,046 ky.	Quote: Take it apart and fix it right. Regardless of 23 or 18 spline, the input shaft will not come out the front without dropping the cluster. Dan This is untrue. Just took my 23 spline OD apart and removed the front input shaft bearing from the front then took the rest out the back WITHOUT dropping the cluster.

Re: A-833 4 speed Input shaft bearing [Re: kenworth_goose] #1005104 06/03/11 09:58 AM 06/03/11 09:58 AM
Joined: Jan 2003 Posts: 74,948 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 74,948 U.S.S.A.	Quote: Quote: Take it apart and fix it right. Regardless of 23 or 18 spline, the input shaft will not come out the front without dropping the cluster. Dan This is untrue. Just took my 23 spline OD apart and removed the front input shaft bearing from the front then took the rest out the back WITHOUT dropping the cluster. The OD trans doesn't impress me, I was able to pull the bearing off the mainshaft, and put it back on by hand , same for the rear bearing on a 727 .

Re: A-833 4 speed Input shaft bearing [Re: crocha617] #1005105 06/03/11 10:50 AM 06/03/11 10:50 AM
Joined: Jan 2003 Posts: 74,948 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 74,948 U.S.S.A.	Quote: It's a 23 spline and all I want to do is change the input shaft bearing. I was hoping to confirm if I could just unbolt the front bearing retainer and switch the bearing out. The trans works great and shifts perfectly. I'm trying to get the car running for the summer and didn't want to send it out for a total rebuild that could take weeks.Thanks. No you can't just swap it like that, would be nice if one could but it's not that easy. What makes your friend it's the front bearing? Buy the rebuild kit and you can do it yourself it's not that hard .

Re: A-833 4 speed Input shaft bearing [Re: JohnRR] #1005106 06/03/11 12:49 PM 06/03/11 12:49 PM
Joined: Jan 2003 Posts: 4,711 Moved to N.E. Tennessee GomangoCuda master
GomangoCuda master Joined: Jan 2003 Posts: 4,711 Moved to N.E. Tennessee	Original Poster Quote: It's a 23 spline and all I want to do is change the input shaft bearing. I was hoping to confirm if I could just unbolt the front bearing retainer and switch the bearing out. JohnRR Quote: Maybe it's the the fact that the input shaft won't come out the front on a 23 spline that I was able to pull the bearing off without disassembling the trans, I popped off the snap rings and used 2 screw drivers against the case and was able to pull off the bearing. JohnRR Quote: No you can't just swap it like that, would be nice if one could but it's not that easy. Which JohnRR do I agree with? or is it disagree with? Oh heck I don't know. In theory, there is no difference between theory and practice. In practice, there is.

Re: A-833 4 speed Input shaft bearing [Re: GomangoCuda] #1005107 06/03/11 01:01 PM 06/03/11 01:01 PM
Joined: Jan 2003 Posts: 5,268 NY 7 70440+6bbl master
70440+6bbl master 7 Joined: Jan 2003 Posts: 5,268 NY	He is trying to say it is not as easy as just unbolting the bearing retainer, removing the bearing by hand, swap bearing and bolt the retainer back on with little effort involved (like you can do with a Tremec or BW T5).

Re: A-833 4 speed Input shaft bearing [Re: 70440+6bbl] #1005108 06/03/11 01:33 PM 06/03/11 01:33 PM
Joined: Jan 2003 Posts: 4,711 Moved to N.E. Tennessee GomangoCuda master
GomangoCuda master Joined: Jan 2003 Posts: 4,711 Moved to N.E. Tennessee	Quote: He is trying to say it is not as easy as just unbolting the bearing retainer, removing the bearing by hand, swap bearing and bolt the retainer back on with little effort involved (like you can do with a Tremec or BW T5). Ok, it' not that easy but it certainly is not difficult. The only reason I did it was because I was already there (replacing broken bearing retainer) and thought why not? If the bearing had actually been shot I would have done a rebuild instead. In theory, there is no difference between theory and practice. In practice, there is.

Re: A-833 4 speed Input shaft bearing [Re: GomangoCuda] #1005109 06/03/11 01:57 PM 06/03/11 01:57 PM
Joined: Jan 2003 Posts: 74,948 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 74,948 U.S.S.A.	Quote: Original Poster Quote: It's a 23 spline and all I want to do is change the input shaft bearing. I was hoping to confirm if I could just unbolt the front bearing retainer and switch the bearing out. JohnRR Quote: Maybe it's the the fact that the input shaft won't come out the front on a 23 spline that I was able to pull the bearing off without disassembling the trans, I popped off the snap rings and used 2 screw drivers against the case and was able to pull off the bearing. JohnRR Quote: No you can't just swap it like that, would be nice if one could but it's not that easy. Which JohnRR do I agree with? or is it disagree with? Oh heck I don't know. It's your call obviously. As said above it's not as simple as one might hope , obviously depends on how tight the press fit it , I do remember it took a bit of work to get it off and get it back on because of the press fit. I would be opening that trans up to see how it looks and regasket it at minimum , see hown much junk flushes out . Last edited by JohnRR; 06/03/11 02:09 PM.

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