Muncie 4 Bearing replacement (Page 2/3)
BadNewsBrendan MAY 08, 12:18 PM
Think I'm just gonna run it without and see what happens. Looks like the sheild is just there to keep the plastic end cap piece of the shaft on and maybe control flow of gear oil through the bearing? At this point I will be happy just to get another 25k miles on it. Hell, I've only put about 5k miles on the car since I bought it.
pmbrunelle MAY 08, 01:00 PM
Isn't there a hole going down the middle of the shaft, where the oil then lubricates the speed gears? Not sure, my memory is fuzzy.

Looks like the shield may restrict flow to the first shaft, so that enough oil remains and can continue to the second shaft, but not really sure.

If you don't really know what the shield does, omitting it seems like a high degree of half-assing (and opening the door to future troubles), but that's just my opinion.
BadNewsBrendan MAY 08, 01:11 PM
Yeah I think you're right, there's passages in the case so it looks like the shield only let's a little oil into the bearing and the rest through the shaft. Well my only other option at this point is to buy a whole used trans and completely disassemble and try and get the shield out of that one and put it in the one I'm rebuilding or just buy a used trans and put it in the car instead and wait til it also starts leaking and then take the shield out and put it in the half rebuilt one. With how much I struggled getting the races out, neither option sounds fun. Of course I had to melt the shield that you can't buy anywhere instead of the two others that are one ebay
pmbrunelle MAY 08, 07:04 PM
You're sure the ebay one won't fit? Compare the photos with what you have.

I have seen two kinds of shield, black plastic and white plastic, and I think they have different part numbers, but appear to be functionally the same. I have mixed and matched the black and white ones.

You used the P-book to determine the part number you needed?
BadNewsBrendan MAY 08, 07:44 PM
Yeah the one I melted is just a mostly flat disk, the other two have little legs on them and different hole sizes. Thought about cutting it to match and drilling the wholes out to the same size as a last resort. The part number is molded in to the part and matches the P-book. It's on the opposite side of the case as the 14008259.

Called a warehouse that sells a bunch of NOS parts and they're going to check to see if they have one on Monday. Fingers crossed.
BadNewsBrendan MAY 08, 07:59 PM

[This message has been edited by BadNewsBrendan (edited 05-08-2021).]

pmbrunelle MAY 08, 10:41 PM

quote
Originally posted by BadNewsBrendan:
Called a warehouse that sells a bunch of NOS parts and they're going to check to see if they have one on Monday. Fingers crossed.



This place I guess? (they list the 14008258)
http://www.phillipsmuscleca...-gm-part-number.html

I can look in my stash if it seems unfindable.
BadNewsBrendan MAY 10, 11:48 AM
Thanks! Yeah thats the place I called on saturday actually and hes gonna get back to me this week. Fingers crossed!
OH10fiero MAY 10, 03:26 PM
Has anyone with a 3D printer tried to recreate these?
BadNewsBrendan MAY 10, 07:51 PM
Got a response back and hes shipping it to me for $30. Pretty pricey for a small piece of plastic but if thats the only place i can get it oh well and can support a business with selling very uncommon NOS parts then oh well.

I thought about the 3D printing route but i don't know anyone that can do it and would need a material that can be heat cycled repeatedly. I doubt there are a lot of people willing to rebuild these trans so probably not a very common part to need replacing.