When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
So, after waiting a week and a half to get the rest of my parts to put the trans back together, I find a message on the dealer's website ;letting me know that my diff shim was on backorder with no restock date. Sucks, I wish they would have sent me an email directly and I would have gone one size up or down and been fine or found another one somewhere in the last week and a half. Possibly there goes getting the trans back together this weekend. Had to blow off some steam on that one but anyways...
I sent an email to Andy at Synchrotech since their close-ish to me, but I'll post here too. I need a 1.6mm thick shim to get to nominal clearance (.05mm) and I'm at 0.2 with the original 1.45mm. I could go one up or down and still be in tolerance. I'm going to go measure again just for a sanity check too, but I'd love to hear some experience from the pros on whether I should ship the thing or sit on my hands for another week and try to find the correct shim.
So, after waiting a week and a half to get the rest of my parts to put the trans back together, I find a message on the dealer's website ;letting me know that my diff shim was on backorder with no restock date. Sucks, I wish they would have sent me an email directly and I would have gone one size up or down and been fine or found another one somewhere in the last week and a half. Possibly there goes getting the trans back together this weekend. Had to blow off some steam on that one but anyways...
I sent an email to Andy at Synchrotech since their close-ish to me, but I'll post here too. I need a 16mm thick shim to get to nominal clearance (.05mm) and I'm at 0.2 with the original 1.45mm. I could go one up or down and still be in tolerance. I'm going to go measure again just for a sanity check too, but I'd love to hear some experience from the pros on whether I should ship the thing or sit on my hands for another week and try to find the correct shim.
Yeah it’s the 1.6. I fat fingered the decimal. 80mm diff thrust shim for an s80 gsr trans. I’m going to put it all together one more time tomorrow and make 100% sure I need it.
Clearance is definitely right at .2mm with the 1.45mm shim. I can get a .008" feeler in there snugly and a .009" is no-go. A 1.6mm (41447-PL3-B00) would get me to the middle of the band @.05mm, so I could do a 1.55mm (41455-PL3-B00) or 1.65mm (41456-PL3-B00) and still be in spec. Not sure if a little tight or a little loose is better. I should have posted this earlier:
So, we'll see how this goes. I talked to a handful of guys local and otherwise and did some internet research. The general consensus is that I will be fine with the base shim. Some trans builders actually seem to prefer opening up the play a little when installing an aftermarket LSD. I don't know if this is due to an expectation of looser tolerances compared to original diffs or what, but I found guys who prefer them to run looser than what I have. The general recommendation is that, as long as there is no side to side or up/down play when fully assembled that I will be fine.
If you're able to find a thicker shim, you can do this to get it down to the proper clearance. Place the thick shim on top of a block of wood, such as a 2"x4". Place a metal block on top and use a press to drive the shim into the piece of wood. This will give you an indentation in the wood that will allow you to hold the shim in place.
Find a smooth surface and tape down some sandpaper, 180, 200, 320,400 grit should be good. Sand down until desired thickness is achieved.
Even if the cost of a surface grinder were free, I don't have to do it enough to justify keeping it around. While it is tedious, it is an option that does work. It can even be done using parts/supplies available at 24hr walmart.
If you're able to find a thicker shim, you can do this to get it down to the proper clearance. Place the thick shim on top of a block of wood, such as a 2"x4". Place a metal block on top and use a press to drive the shim into the piece of wood. This will give you an indentation in the wood that will allow you to hold the shim in place.
Find a smooth surface and tape down some sandpaper, 180, 200, 320,400 grit should be good. Sand down until desired thickness is achieved.
Differential Thrust Shim
... BOX---->Bense
