Adjustment for transmission bearings

Jason1Pa

Member
Ok yall I have a question. I'm restoring a 45 2N and I just replaced all bearings and races in the transmission and I installed the counter shaft tonight and put the three shims that were on that shaft back on. I'm using a inch pound torque wrench and trying to get 15-20 inch pounds as the manual recommends. With those three shims I'm getting around 30 inch pounds as I rotate the shaft. So it too tight. I grabbed the thinnest shim that will be going on the main shaft just too see what the torque wrench would read. That shim is around .005 thick. I got reading around 8 inch pounds. Too loose. So my question is. What you all do in this situation? I even tried to make my own shims out of various gasket material and I always end up too loose or to tight. Is it proper procedure to do each shaft alone or should I have the entire transmission together while I test bearing preload? Any help or suggestions?
a248343.jpg
 
Ok guys I kind of find out some things since I posted this. I checked out nnalert and saw they do have a .003 shim along with a .005 and a .012 I'm assuming a.003 would make my bearings just right but I don't have one. I would sooner find a sheet of shim stock and make my own. I looked online and don't see any place that I could just drive to and get. Do you know of any place? I just don't feel like waiting any longer to get the shims shipped. Plus they are pretty expensive and I'm not sure what ones (or how many) I'm going to need so it would be best just to be able to make my own. Thanks!!
 
What are the sizes of the shims you have ? I had to make some axle bearing shims for my 3000 . As I remember the roll of aluminum flashing that I got from the hardware store was about .008 thick .

Trying to make a shim from .003 material may be a challenge but changing a .005 out for a homemade .008 might not be so hard .
 
I have a draw full of assorted thickness brass shim stock ( 6" x 8" ???) that I bought 10 - 15 years ago from a real auto parts store .
 

On second thought I keep 10 packs of gaskets that are used on the front inputshaft retainer and the bearing cover for the front of the cluster. I would use one of those and to set the preload. Make one for the front brg retainer and put it there you do not have to do the adjustment at the rear. Improvise :idea: It does not care which end you get it from...

Run the input gasket thru your copy machine I think all of the gaskets/metal shims are the same size..
 
Try beer can material. It's thickness is about in the range you're looking for. It may vary a little by can manufacturer so you might have to keep emptying cans until you find one the right thickness or don't care anymore. :wink:
 
(quoted from post at 15:21:10 01/14/17) I actually tried the manila folder Hobo. Still too thick.

If you are sure every thing is seated 8 will be OK. The main thing is no slack and not to tight.
 
(quoted from post at 09:12:27 01/14/17) Try beer can material. It's thickness is about in the range you're looking for. It may vary a little by can manufacturer so you might have to keep emptying cans until you find one the right thickness or don't care anymore. :wink:

No need to guess or drink yourself into a stupor ;-)

McMaster sells sheets/rolls of shim stock in just about every form and material you can imagine. A 6" x 100" roll of carbon steel stock costs $10-12 and is available in thicknesses from .001 to .010. If you want it in spring steel it will cost about 2X. Trace an OEM shim on .002/.003 stock and cut out with scissors. Or send them a CAD file and they will CNC machine cut them for you - $100 for as many as they can get out of a 12 x 12 sheet of SS stock ;-)

Shim Stock

TOH
 
(quoted from post at 10:01:04 01/14/17)
(quoted from post at 09:12:27 01/14/17) Try beer can material. It's thickness is about in the range you're looking for. It may vary a little by can manufacturer so you might have to keep emptying cans until you find one the right thickness or don't care anymore. :wink:

No need to guess or drink yourself into a stupor ;-)

McMaster sells sheets/rolls of shim stock in just about every form and material you can imagine. A 6" x 100" roll of carbon steel stock costs $10-12 and is available in thicknesses from .001 to .010. If you want it in spring steel it will cost about 2X. Trace an OEM shim on .002/.003 stock and cut out with scissors. Or send them a CAD file and they will CNC machine cut them for you - $100 for as many as they can get out of a 12 x 12 sheet of SS stock ;-)

Shim Stock

TOH

Sure, take the easy way out! He was looking for something he could get immediately though. I've seen a few Google search results that say beer cans have a thickness of 0.0038", very close to what he needs. Soda cans too I suppose.
 
(quoted from post at 23:18:36 01/14/17)
(quoted from post at 10:01:04 01/14/17)
(quoted from post at 09:12:27 01/14/17) Try beer can material. It's thickness is about in the range you're looking for. It may vary a little by can manufacturer so you might have to keep emptying cans until you find one the right thickness or don't care anymore. :wink:

No need to guess or drink yourself into a stupor ;-)

McMaster sells sheets/rolls of shim stock in just about every form and material you can imagine. A 6" x 100" roll of carbon steel stock costs $10-12 and is available in thicknesses from .001 to .010. If you want it in spring steel it will cost about 2X. Trace an OEM shim on .002/.003 stock and cut out with scissors. Or send them a CAD file and they will CNC machine cut them for you - $100 for as many as they can get out of a 12 x 12 sheet of SS stock ;-)

Shim Stock

TOH

Sure, take the easy way out! He was looking for something he could get immediately though. I've seen a few Google search results that say beer cans have a thickness of 0.0038", very close to what he needs. Soda cans too I suppose.
A "few" years ago I ran a commercial snowplowing route with
my 1978 Plymouth Trailduster and a Western snowplow.
One Sunday it was snowing heavily and my joystick controller
would not turn the plow to the left. I took it apart and found
that the brass "cross" in there had broken off on that side.
After thinking about it for a while, being a Sunday night, I
figured I'd drink about it instead. Then I cut up the beer can
and attached a piece of it to replace the broken brass piece.
It got me through the next day's plowing until I could get a new one.
Of course, cans weren't made out of the same material then.
They just don't make 'em like they used to! ;)
 
Thanks everyone for the help guys. I got it together and I'm happy with the results. I just found a couple different thicknesses of paper and got it. NAPA was out of shim stock. All though the the inch pounds I have it set at is lower then the manual calls for but if I would of left it at the minimum specs it was just too tight to turn.
 
Laminated Shim stock peelable remove .001-.0001 of an inch at a time are available today in several materials I've used it many times when I was still working probably expensive in the market place but an option for anyone who has a project that requires a high degree of accuracy. Note: This is informational only I'm not suggesting it particularly because he's happy with it now just food for thought.

Material Pressure Resistance (psi)
Aluminium 14,223
Brass 64,004
Stainless Steel 99,562
Carbon Steel 120,897

If the application is:
•Less than 300°F with no pressure: use aluminium
•Less than 300°F with pressure: any material listed can be used
•Greater than 300°F with or without pressure: use brass, stainless steel, or carbon steel
44374.jpg
 
(quoted from post at 07:56:41 01/16/17) Laminated Shim stock peelable remove .001-.0001 of an inch at a time are available today in several materials I've used it many times when I was still working probably expensive in the market place but an option for anyone who has a project that requires a high degree of accuracy. Note: This is informational only I'm not suggesting it particularly because he's happy with it now just food for thought.

Material Pressure Resistance (psi)
Aluminium 14,223
Brass 64,004
Stainless Steel 99,562
Carbon Steel 120,897

If the application is:
•Less than 300°F with no pressure: use aluminium
•Less than 300°F with pressure: any material listed can be used
•Greater than 300°F with or without pressure: use brass, stainless steel, or carbon steel
44374.jpg

Just one of the options in the McMaster page I provided earlier. A 12 x 12 sheet of laminated carbon steel with 4 x .002 layers will cost you $23. Aluminum is $11, SS and Brass $30....

TOH
 

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