I need a little help to clarify what I need to do in order to get this transmission set up correctly.

I found this article online but confused about parts I need to order.

Type R LSD into Y80 trans help

This is the exact situation I have. Here was his update when he finished.

"Ok finished, update-

Yes EG30 info is correct

The enclosed bearing type are the way to go for the lsd install they are easier to check for the correct bearing preload.

The problem i had was the diff bearings, it seems there are 2 different bearings sizes available with the same part numbers which made my problem hard to identify since both bearings look identical if you dont know what to look for.

The enclosed bearings are available in 40x80x18 or 40x80x19.5 both have the same part number from what ive seen in all my searches

The bearings i needed to install the typeR lsd into a Y80 are the 40x80x19.5

Its the inner race of the bearing that is the difference one is 1.5mm thicker than the other and its pretty hard to notice just by looking at it.
You will need this extra 1.5mm on the speedo ring gear side to give your lsd enough clearence when its in the case or the speedo ring gear will foul.

Since i had two perfect bearings but they were the 40x80x18 size i found there is an Mfactory bearing shim kit to fix the problem also, it is basicly two shims one for each side of the diff that are 1.5mm thick each that you slip onto the diff before pressing the bearing on each side which makes up the difference on the bearings inner race thus bringing it upto spec to 19.5mm in width.
I ordered my Mfactory shim kit here but you might find a closer dealer elsewhere
Synchrotech - Honda & Acura Transmissions

After installing my Mfactory bearing shims i put the lsd into the case and torqued it down i measured a gap of 1.45mm.
The case shim is available in various sizes, i ordered 1.45mm for mine the part number is 41454-PL3-B00
clearance between the 80mm shim and bearing outer race (tranmission housing side) is zero so now my lsd is done.

I found these following links very helpful during my install to help open the transmission etc

http://www.xm-parts.com/articles/hgear/gear.htm

B-series transmission teardown/rebuild tutorial - Honda-Tech

I hope the following info helps people looking to do the lsd install

Props to EG30 who really took the time to help me alot! "


What I gather from his update is that he had the smaller 40x80x18 bearings and added 1.5mm shims on each side of the LSD so it's like having the larger 40x18x19.5 bearing in place. So at that point he puts the LSD back in the housing and closes the case to pre-load everything only to measure the gap between the bearing and the case (where the bearing meets the case)? He measured 1.45mm of a gap so he ordered that size shim to give him 0mm gap??? Am I understanding this correctly? So I need to measure my bearings (b/c they are also new) and figure out if I just need to order shims for the LSD (shims installed before the bearings) or If I have the larger bearing I just need shims to fill the gap between the housing and the LSD bearing?

There were pictures showing where to measure but the links don't work.

If anyone could PLEASE clarify that I have the right thinking behind this. I don't want to mess up my transmission over a measurement.

Just to give you an idea of what I'm doing. I bought my brothers transmission for a decent price. He bought a Y80 GS-R transmission and ITR final drive with LSD and swapped the internals to a YS1 cable transmission housing for his CRX. Now I need to swap it back to a hydraulic housing. Unfortunately, he got the Y80 and not a S80 or this would be a direct swap. The difference being one uses the taper style bearing and the other uses the enclosed bearing type.

Thanks,
Ryan

 

So I'm having some strange problems with this swap.

So some reason I had to shave down the web inside the clutch housing in order to get the LSD to seat in the case. Just like one would have to do to install into a cable transmission case. This is def. a hydro transmission this is going into.

So after I got the LSD to seat all the way I put the top half of the case on and bolted it down and now the LSD will not spin freely at all. If I loosen the case it spins. Maybe the bearings are not on all the way on the LSD side of things? I'm just really confused now.

The gear set came from a hydro transmission and then was installed into a cable and now I'm putting it back into a y80 hydro case. So I'm not really sure why it's becoming this problematic.

Any help would be greatly appreciated.

 

Pics would be very helpful if you can post them. You should not need to shave the hydro case down to fit the LSD. If you have a Viscous LSD (14 bolts) it could be the problem. The 10 bolt helical ITR LSD can be set up with tapered bearings or 19.5 ball bearings or the conversion kit. The Viscous LSD from YS1 uses 18mm ball bearings and the Viscous LSD from a hydro Y21 or Y80 uses tapered bearings with special spacers that only fit that model. If the LSD fit the YS1 housings I would reuse the same shim setup in the Y80. (FYI the Y80 and S80 housings are the same to set up and are interchangeable)

 

Hello,

I have been actually talking with a rep from the same company you work for. David is the person I have been emailing.

I do have some pictures.

Yes, this LSD is the viscous type (14 bolt) and I am certain that it came from a JDM GSR with the optional LSD. The ring gear and the countershaft match for a GSR.

This LSD was used with a GSR hydraulic gear set (Gears from a Y80) but collectively put inside of a YS1 (92-93 Integra) cable transmission. The web had to shaved to fit this type of LSD I assume. The YS1 is supposed to be identical to the hydraulic casing or at least that is what I assumed.

The goal is to now go back to a hydraulic transmission.

I made the same modification to the Y80 case as the YS1 had (shaved webbing) and got the LSD to drop in fine. Everything clears. What I just noticed today is that there is a shim (snap ring type) inside the cable transmissions gear side of the case that I did not put into the hydraulic case. I'm going to put that shim in place and see if the LSD will turn freely.

The next step that David suggested was to remove the bearings from the LSD and measure them to make sure they are correct.

The stock dif. from the Y80 did use the tapered type of bearings. I took the cup plate (outer race) out of the Y80 case on both sides and also removed the shims that came stock. I still have them if I need them. I just need to find the spec to install them back in place if needed. At this point I am trying to mimic what the YS1 used and see if it works. I will know if the one shim being missing is the problem. The LSD spins with the case open but not with the case closed. With little pressure closing the case (using my hand to hold the case together, the LSD gets hung up. If I stop pushing them together it will spin. That has me thinking the spacer needs to keep the bearing out of the bore a little and will free it up.

Please let me know what pictures you would like me to take and I will do so. It really seems like the cases are the same. The cable transmission worked flawlessly with the same internals.

Thanks for your response
Ryan

 

I am David Henson (Synchrotech owner).I think you have been talking to my parts manager David Ruiz. I just spoke with him and I will try to help you.


Since you have a GSR viscous LSD (not an ITR LSD), the normal rules do not apply. I have set up a few like this with ball bearings and some creative shimming but it is best to use the OEM tapered bearings and shims on both sides if you still have them.


If you do not have the OEM bearings and shims use a 19.5 ball bearing on the speedo gear side (or 18mm + 1.5 shim between the bearing and diff). This will lift the diff away from the fins. Use an 18mm ball bearing on the top side. Measure the space and use the OEM snap ring style shim on the top case to get the proper clearance. Depending on the gap it may require 2 thinner shims to get the correct size. I actually had to custom grind 2 shims and combine them to get it right. You can follow the instructions on the B18C ITR bearing conversion kit and not use the inner 1.5mm spacer on the top bearing but the 1.45 case shim will probably not be correct and you will need to adjust for this.

 

Awesome information and thank you!!!! Yes, it was David Ruiz I have been speaking with.

I do have the original shims that were used for the open differential. The clutch housing side had a thick shim behind the coned tapered outer race and the gear side of the case had 2 thinner shims and tapered outer race.

You are saying to either use the tapered bearings I have or use the setup and custom shim (depending on the gap) correct?

If I use the tapered bearings, do you know how far in the outer race needs to be pressed in place? I assume I would put the thicker shim in and then press the outer race all the way down until it seats onto the shim??? I have heard it is difficult to measure the clearance with the tapered type. Any advice on that end? If it's in a service manual I will search but I have only come across the the enclosed type of installation.

Thanks again. You guys rock with information.

Ryan

 

The tapered bearings are the same on the JDM GSR and the USDM open GSR diff but the spacers are not the same. The viscous LSD uses thinner spacer washers so unless you still have them you will need to get creative and go with the ball bearings as mentioned.

 

I will go the ball bearing route then.

Thanks!

 

I just purchased the bearing conversion kit from you guys and I'll get the shims from Honda after I measure the gap.

Thanks for all the help. Hopefully if someone finds themselves in the same situation this thread will shine some light on this oddball setup.

 

Ok, installed the bearings 18mm+shim on gear side and then just the 18mm bearing on the top side. I put the Y80 top on and the LSD does not spin free at all. I put the YS1 cable transmission top on and it spins freely. I only have the diff installed.

Has to be some sort of difference with the tops b/c it wouldn't spin with the old bearings and Y80 top either. There were no shims used with the old bearings but I dont know if they were the 19.5mm or not.

The tops cases look identical. It seems like there is the same gap on the top side just from looking at it. I'm not sure if something on y80 top would hang it up or not. Going to look into a little further tomorrow morning. Hopefully I get this figured out.

 

This morning I lifted up the case a little bit around the diff. and it was able to spin freely. So I was able to see how small of a gap I needed to lift it for it to spin. I shimmed the case with one of the bearing shims and it holds it up enough for the diff. to spin freely. Do you think I need to remove the shim I put under the bearing on the gear side? I noticed that the housing does not sit flush with the diff. in place. Sort of wobbles a bit. Without the diff. the housing drops on flush just like the YS1 cable transmission housing.

I might take my hydro LS transmission off my car ( I have to change the clutch anyway) and see if that housing drops on without any problems. Other than that it just seems like it's too tall to fit.