Well guys im Installing a LSD in my ys1 tranny. Right know im testing the differential thrust clearance. I just wanned to know if I could reuse the oem shim that came with my YS1 tranny. Cause i did install my oem shim and try to test my clearance and i coulnd even get a .002 feeler in it. help

testing the differential thrust clearance


oem shim

 

Measure the clearance without the shim in there. It's possible that the original shim is too thick (happened to me).

 

so I have to measure the clearance without the shim and then get a shim the same size as the feeler I install?

 

Do you have the FSM, that'll help a lot. There's a range of clearances allowable, so you get the shim that'll get you within that range. Figure it like this. The shim is thickness X. The clearance is thickness Y (though really that thickness is just an open space). If you remove the shim, measure that space with a few feelers stacked together (there aren't any thick enough alone), subtract the allowed clearance from that measured value, then that'll give you the correct shim thickness you should be using.

In mathematical reference:

X + Y = total space measured
Total space -Y (clearance value) = proper shim thickness

 

Sorry <U>sscguy</U> but u got me a lil confuse on that one.

 

Ok, let's try this again. If you take the shim out, there's a space in your diff. That space will be occupied by the proper sized shim and the clearance space (the space between the shim and the diff housing). Measure that space by stacking several feeler gauges on top of each other. Then subtract the spec clearance space (I think it's 0.004", but I'm absolutely not positive, so don't take my word for it.), and the remaining number is the thickness of the shim you should get. Then you call up your friendly Acura dealer, tell them the thickness you require, and they send you the right shim.

 

Got it thank. I quess i can't use the oem one cause is to big right. ill call my friendly Acura dealer and ask for the shim after i do my measure. Let say some one use the oem one what could happen?

 

It's possible that the original shim could work, but it's hard to say. If you have a micrometer, after you figure out what the thickness of the shim SHOULD be, you could compare that value to the one you already have. If it's within spec (+/- 0.004" for example, if that's the value) then you could use it. Some people prefer things on the tight side (where the shim would be slightly oversized, but still within spec), while others prefer loose (where the shim would be slightly undersized, but again within spec). There are positives and negatives to both, and I sure don't know enough to recommend one or the other.

Edit: That didn't really answer your question. If it was beyond spec, like way too thick, I imagine there would be a lot of resistance on the diff, and that could probably cause some kind of problem. I'm not really positive on what the exact effects would be, but I know that if there's a spec measurement for it, stick within spec. The engineers who decided that DO know what they're doing, even if they don't tell us

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by G2ILS &raquo;</TD></TR><TR><TD CLASS="quote">Got it thank. I quess i can't use the oem one cause is to big right. ill call my friendly Acura dealer and ask for the shim after i do my measure. Let say some one use the oem one what could happen?</TD></TR></TABLE>

You're going to use an "OEM" shim no matter what. The original shim may be too thick....

I say, measure the clearance with no shim... find out what you need to get, and put the original shim on a bench grinder and take it down to 'spec'

 

Bench grinder...*sigh*

 

Wont have any issues as long as you grind it evenly all the way around. A mic will help with this.

 

Damn that's a good idea. Let me try that. Thanxs .RJ

 

Yo guys im doing my calculation so i could get my differential thrust clearance. one question do i have to hit the spec target of 0.004 or get as close as possible. or could i leave any target from 0.0 to .004?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sscguy &raquo;</TD></TR><TR><TD CLASS="quote">Bench grinder...*sigh*</TD></TR></TABLE>

its a few bucks at a machine shop, had to this before when a certain size was on back order

 

u didnt answer my question

 

0-0.004" will be fine, IF 0.004" is in fact the right number. You need to consult a factory service manual (or Bentley's) to make sure.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by .RJ &raquo;</TD></TR><TR><TD CLASS="quote">

You're going to use an "OEM" shim no matter what. The original shim may be too thick....

I say, measure the clearance with no shim... find out what you need to get, and put the original shim on a bench grinder and take it down to 'spec' </TD></TR></TABLE>

* cough cough* HACK * cough cough*

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Evs-One &raquo;</TD></TR><TR><TD CLASS="quote">

* cough cough* HACK * cough cough*

</TD></TR></TABLE>

So?