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gearbox bearings

Posted by JimNH

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gearbox bearings #1
JimNH Jim Mail Nashua, New Hampshire, USA 1957 MG MGA "Camilla (the Other Woman)"	Posted: April 18, 2012 06:09PM Registered: 3 years ago Posts: 2,645

I want some more rolling element needle bearings for my layshaft - or I can use the longer ones like the ones in the first motion shaft.

Moss doesn't sell them individually, and the numbers on Barney's page don't seem to cross to anything local.

Anyone have a common bearing designation for these that I can order somewhere - a source would be great!

Thanks.

I think I damaged one of mine drifting the spacer tube in a wee bit too far. That tube is a bear to drift in or take out. I am dreading getting all the circlips out again - so I'll need those replaced too I guess!

JIM

Edited 1 time(s). Last edit at 04/18/2012 06:49PM by JimNH.

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Re: gearbox bearings #2
Garons Own Garon Curtis Fair Oaks, CA, USA 1956 MG MGA 1500 1964 Vespa VNB 125 "Allstate"	Posted: April 18, 2012 10:40PM Registered: 1 year ago Posts: 20

Jim, I was just looking at layshaft bearings, because I am in the process of rebuilding my 56 gearbox. My rear bearings are pitted while the front ones seem ok, so I was thinking of just replacing one set. The Moss catalog illustration looks like the kit (461-570) $55.95, includes three bearings, two circlips and the tube spacer. Victoria British sells single bearing (2-2004) for $10.95 and circlip for $.75.

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Re: gearbox bearings #3
JimNH Jim Mail Nashua, New Hampshire, USA 1957 MG MGA "Camilla (the Other Woman)"	Posted: April 19, 2012 06:43AM Registered: 3 years ago Posts: 2,645

Found them on Victoria British - thank you.

I'll order them there.

If I could cross them to a bearing number, I could probably go to my local Eastern Bearings office and get them for about 1/2 the price, esp. ordering from VB with expedited shipping...

JIM

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Re: gearbox bearings #4
Shawn at Moss Shawn Carlberg Goleta, USA	Posted: April 19, 2012 09:56AM Registered: 1 year ago Posts: 86

Jim,
We have them by themselves we just list a kit because most people will need them all. In general, if a Moss number ends in an 8 it usually means it is a kit that we put together and we should be able to sell any part out of it. I am home today and got locked out of my work computer so I can't give the bearing part number this moment. A sales guy should be able to if you call or give me a few minutes as I have IT unlocking my computer in the next 10-15 minutes.

Shawn

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Re: gearbox bearings #5
Shawn at Moss Shawn Carlberg Goleta, USA	Posted: April 19, 2012 10:20AM Registered: 1 year ago Posts: 86

Jim,
The bearing is a 128-300, the circlip is 326-190 and the tube, which I doubt you need is 461-580. All in stock in VA.

Shawn

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Re: gearbox bearings #6
JimNH Jim Mail Nashua, New Hampshire, USA 1957 MG MGA "Camilla (the Other Woman)"	Posted: April 20, 2012 06:21AM Registered: 3 years ago Posts: 2,645

I have the bearings on order - from VB this time as they did list them separately in the catalog (before I read the post immediately above, but thank you for the info - it will not be archived for others).

I also ordered 20 of the first motion shaft rollers. I think the plan now is to undo what I have done (breaking the @#$% circlips to get them out) and put non-caged bearings in the front and non-caged longer bearings (from the first motion shaft) in the rear to get more bearing area back there without having to machine the bore to do it.

Boy I hate those circlips!

JIM

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Re: gearbox #7
JimNH Jim Mail Nashua, New Hampshire, USA 1957 MG MGA "Camilla (the Other Woman)"	Posted: April 24, 2012 08:43PM Registered: 3 years ago Posts: 2,645

I did it! I got the spacer cut down 1/2" and used the longer loose bearings in the rear, and the two sets of caged bearings up front. Getting the circlips in is a nightmare - and you have to break them to get them out.

This job is a total pain, but now I can get going on the rest of the rebuild - hooray!

BTW - the caged bearings from VB are seemingly of much higher quality than those from Moss - at least the cages are much sturdier. I bent one of the Moss cages when trying to put the clip in and then it wouldn't roll, so I had to start over (breaking another clip). The VB cages are cast not stamped and much sturdier. I am sure they both roll just fine if you can get it together without being as ham-fisted as I am.

I have the loose rollers set in a think film of grease to hold them there while I reassemble everything. I have to take out the fist motion shaft, which I proudly reassembled before realizing that you need it out to install the layshaft. Note to self - read Barney's instructions all the way through first next time.

No more until this weekend - back on the road trying to sell robots next three days. More to come.

JIM in NH

Edited 1 time(s). Last edit at 04/28/2012 10:11AM by JimNH.

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Re: gearbox bearings #8
Gary E Gary Edwards Kernersville, ,N.C., USA 1962 MG MGA MkII 1974 MG MGB GT	Posted: April 24, 2012 09:11PM Registered: 6 years ago Posts: 5,202

Make a dummy shaft out of a 5/8 dowel rod. Cut the rod the same legnth as the laygear plus the 2 bushings. This way when you put the layshaft in the box all you have to do is get the shaft started at one end and it will push right through. Otherwise you have to try to line up the bushings and the gear on each end. Real pia.

Gary

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Re: gearbox bearings #9
JimNH Jim Mail Nashua, New Hampshire, USA 1957 MG MGA "Camilla (the Other Woman)"	Posted: April 25, 2012 06:35PM Registered: 3 years ago Posts: 2,645

Great idea - thanks. That will also keep the loose needle bearings from falling out if I knock the transmission or the layshaft around while trying to get everything lined up - which I was picturing in my head already...

The very next transmission I rebuild will take about 1/12 as much time as this one has!

JIM

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Re: gearbox bearings #10
Gary E Gary Edwards Kernersville, ,N.C., USA 1962 MG MGA MkII 1974 MG MGB GT	Posted: April 25, 2012 06:46PM Registered: 6 years ago Posts: 5,202

The next time when I fix my screw up on this one. It will only take a few days to R&R.

Gary

Edited 1 time(s). Last edit at 04/25/2012 09:32PM by Gary E.

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Re: gearbox bearings #11
JimNH Jim Mail Nashua, New Hampshire, USA 1957 MG MGA "Camilla (the Other Woman)"	Posted: April 25, 2012 07:37PM Registered: 3 years ago Posts: 2,645

Gary - I must've missed the thread...what did you do?

Trust me - I am interested!

JIM

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Re: gearbox bearings #12
Gary E Gary Edwards Kernersville, ,N.C., USA 1962 MG MGA MkII 1974 MG MGB GT	Posted: April 25, 2012 09:31PM Registered: 6 years ago Posts: 5,202

I used the third sync out of a used box because it looked better. I now have a slight grind when downshifting to third that I didn't have before. I swapped a grind going to second for one going to third.
I have learned more about what is required to take off and whats not. I also know that I can pull and install the engine and gearbox as a unit.

Gary

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Re: gearbox bearings #13
JimNH Jim Mail Nashua, New Hampshire, USA 1957 MG MGA "Camilla (the Other Woman)"	Posted: April 26, 2012 06:45PM Registered: 3 years ago Posts: 2,645

I got the laygear and the first motion shaft all back in.

Doing the third motion shaft next tonight!

Using all new Synchros...not gonna chance it, and mine were all pretty hosed, though fourth gear was probably reusable, I don't see the point.

JIM

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Re: gearbox bearings #14
barneymg Barney Gaylord Naperville, Illinois, USA 1958 MG MGA "MGA With An Attitude"	Posted: April 26, 2012 09:33PM Registered: 8 years ago Posts: 2,141

In reply to # 2051423 by JimNH I got the laygear and the first motion shaft all back in.

Doing the third motion shaft next tonight!
....

Chuckle. Wait until he realizes the laygear has to be dropped to the bottom of the box before installing the mainshaft.

Barney Gaylord
1958 MGA with an attitude - http://MGAguru.com
Notice: - Do not leave a PM for me on the forum server. Send any private message to my personal e-mail address barneymg@mgaguru.com

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Re: gearbox bearings #15
JimNH Jim Mail Nashua, New Hampshire, USA 1957 MG MGA "Camilla (the Other Woman)"	Posted: April 26, 2012 10:24PM Registered: 3 years ago Posts: 2,645

Yeah, yeah...already figured that out...I re-read your instructions, Barney and I had it floating until the third motion shaft went in - already learned my lesson there. Thanks again for the Guru site - couldn't live without it!

It's all back together. Shifting is a bit hard, but seems positive and correct.

It's late and I'm tired, so I'll reinspect that it is working well before reinstalling and moving on to replacing the engine.

No parts left over that I can find - sort of. The gasket kit came with one largish red fiber washer that I can't figure out...?? Didn't take one out that I can remember. I did not take the tach drive off though, so maybe it is part of that? (I didn't have a socket large enough, and it wasn't leaking before that I know of.)

JIM

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Re: gearbox bearings #16
JimNH Jim Mail Nashua, New Hampshire, USA 1957 MG MGA "Camilla (the Other Woman)"	Posted: April 28, 2012 10:10AM Registered: 3 years ago Posts: 2,645

All the gears work. I installed the shifter extension temporarily on the bench and it shifts well. Very much different than before. It slots into each gear very positively with no sloppiness - almost like it needs to "break in" a bit, but I guess it is working the way it would have when new, since it is basically now new. I put a little oil in it on the bench since it's hard to fill once in the car, but I didn't fill it full, since most of it would probably drain out the rear as I tilt it to get it into place.

I am convinced now that I can install it back into the car. I think if the gods smile on me that by tomorrow afternoon the car will be running again.

JIM

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