 OT: How to adjust 901 shims, on the intermediate plate? |
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| olav |
  Sep 27 2005, 01:22 PM
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#1
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Senior Member  Group: Retired Members Posts: 1,107 Joined: 28-December 02 From: Los Gatos, CA. USA Member No.: 34 Region Association: None  |
Was wondering how the factory figured out how many shims to put in the case side intermediate plate in the first place? And what are they shiming anyway? Does it make that much of a difference? Just curious? |
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| Cap'n Krusty |
Sep 27 2005, 01:28 PM
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#2
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Cap'n Krusty Group: Members Posts: 10,794 Joined: 24-June 04 From: Santa Maria, CA Member No.: 2,246 Region Association: Central California |
They use a fixture that goes in in place of the diff and holds a dial indicator set with yet another fixture. The pinion depth is measured, and compared to the depth determined during manufacture to be the quietest running, longest wearing, and most appropriate. It's marked on the pinion and/or the ring gear. The pinion head shims do most of the adjustment, and the paper shims fine tune it. Once it's properly set, the ring gear preload and backlash are set. Carefully and accurately measuring the old paper shims should get you into safe territory. The Cap'n
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| Joe Ricard |
Sep 27 2005, 01:30 PM
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#3
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CUMONIWANNARACEU Group: Members Posts: 6,811 Joined: 5-January 03 From: Gautier, MS Member No.: 92 |
Yea it is getting to be that way. anything 914 related is the minority here.
Anyway, You are determining the depth of the pinion gear as is relates to the ring gear. Measured with some snazzy tools that are shown in the FACTORY MANUALS. of all places they even sort of explain it. |
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| olav |
Sep 27 2005, 02:24 PM
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#4
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Senior Member Group: Retired Members Posts: 1,107 Joined: 28-December 02 From: Los Gatos, CA. USA Member No.: 34 Region Association: None |
So, if you don't have the fixtures then you really need those shims then. Ok, cool. Thanks for the explaination much appreciated. |
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| ClayPerrine |
Sep 27 2005, 02:29 PM
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#5
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Life's been good to me so far..... Group: Admin Posts: 15,540 Joined: 11-September 03 From: Hurst, TX. Member No.: 1,143 Region Association: NineFourteenerVille 
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Olav,
I was able to retain the proper number and location of the shims in my transmission so that it runs fine without any gear whine. If you do want to change something, make sure that you follow the procedure in the factory manual, and double check your math multiple times. Question.. Why is this thread OT? It is certainly on topic. |
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| olav |
Sep 27 2005, 02:34 PM
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#6
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Senior Member Group: Retired Members Posts: 1,107 Joined: 28-December 02 From: Los Gatos, CA. USA Member No.: 34 Region Association: None |
I'll preserve the current shim thickness. I was just wondering what it was for and how important it is. They just seem so thin that it didn't matter... but I know better now. Thanks! I marked it as OT as a funny (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif) . With all the OT stuff going on it seem that 914 subjects are OT! |
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