Ok to preface this topic I have not yet had a chance to contact Baranco Acura about this issue (will tomorrow or monday), but I felt compelled to write about this since this is the first time (and im sure many others) have seen anything like this.
To start things out I purchased a new Quaife LSD for my LS transmission since I destroyed the stock differential. Prior to installing the LSD, further research implicated that for me to complete the installation, it was advised to purchase a new pair of differential bearings.
After a little researched I found IN VTEC's itr LSD install write up to be very helpful : http://honda-tech.com/zerothread?id=795700
I found that the part number* for the bearings were:
*please note that this part number is for the ENCLOSED bearings and not the other half rack style.
Ok continuing I ordered 2 bearings from Baranco Acura in GA.
Upon arrival I was eager to get my project going again. I checked out that the part numbers matched and indeed they did. I checked that the markings on the bearings were identical. Everything seemed fine so I went ahead and pressed them on to my new quaife differential.
After installing the bearings onto the differential I was ready to test fit and set the assembly into the transmission housing to check my thrust clearance. To my disappointment I found that my gear box cover was settled all the way over the bearing on the top of the differential but the seams between the tranny case and the gear case were not touching.
At first I thought that it could have been possible that I didn't seat the bearings all the way onto the shaft of the new quaife. I removed the LSD and tried to 'seat' the bearings more with a rubber mallet and a 1 5/8" socket. Test fit......still the same thing.
After taking a closer look I noticed that the bearings were indeed seated all the way, however I noticed that the new bearings that I just installed had an extra lip to them on the inner shaft:
Heres the original stock diff, stock bearing:
Heres the quaife LSD with the new bearing:
After recognizing that the bearings that I had just installed weren't looking right I decided to go to harbor freight and buy a bearing splitter and puller to pull one of the bearings and check its specs.
In the following picture on the left is the new bearing from Baranco and on the right is the old bearing.
Backside shot (no pun intended):
So both bearings pretty much *look* the same until you see them from this angle:
So with the helpful use of my digital assistant Mr. EDC (Electrical digital caliper) I measured the inner shaft width of each bearing:
Width of original bearing = 18mm :
Width of new bearing = 19.45mm (~1.5mm+!!) :
You can really see the extra lip in these next two pics:
So in conclusion since each bearing is 1.5mm+ out of spec that would give me a total of +3mm out of spec with the other bearing. Thus there is no way for me to use these bearings since they will not allow any negative clearance between the bearing and the case for my thrust shim clearance (which should be .004").
This also makes me wonder if any other individuals on here have had this problem at all or am I the first one?? This also makes me suspect that since the bearings add +3mm of end to end height on the differential it could be possible that some people didn't catch this and it could lead to a cracked case or even tranny failure....
Any insight would be greatly appreciated
I will be contacting Baranco as soon as I can. I let you guys know whats up
- Bearings from Honda 1.5mm out of spec
- Can't measure for thrust clearance because the gear case rides on the diff bearings because of the extra inner shaft height of the bearings...
- Big PITA!!!
Modified by InfamousDC2FI at 12:43 AM 5/14/2006