I am installing a Quaife limited slip into my 1995 Gsr transmission. My transmission has the tapered style bearings and I am wanting to install the type r roller style bearings. With that being said, I have ran into a few problems... I need to know the following:

1. When converting to the type r dif bearings, which shims will I need? (If any) I have read that the type r bearings already have an offset but am still confused at whether I still need shims or not..

2. If so, how many and how do I know what size shims I need?

Yes I have searched and read many threads but have yet to come to a definite answer.. Any help will be much appreciated!

 

When using the GSR Ball bearings # 91005-P80-E31 you will need one shim in the top case. The 3 washer style spacers from the tapered bearings will not be reused. Every case is a little diferent so the shim comes in various sizes. The most common shim is 1.45mm OEM# 41454-PL3-B00. Start with this one as it will work 90% of the time but you will still need to check the clearance. The service manual calls for 0 - 0.1mm between the bearing and case with the cases closed on the diff. Basically you want to take all the slack up but not put pressure on the bearings. With the diff installed with the shim (no shafts) bolt the cases together and you should be able to spin the diff with your fingers but it should not move back and forth in the case.

Good luck with the install and feel free to post any questions.

 

Thanks for the detailed post man that really cleared things up for me. When putting in an lsd, do I have to reshim the main shaft too?

 

You shouldn't need to reshim the mainshaft unless you have changed the case or the shaft.

 

I'm actually changing the outer half of the case because the gsr one was cracked. I am changing it to an ls one that I have. You recommend reshimming the main shaft too?

 

It shouldn't need to be reshimmed but you should check it. You can follow the service manual but it requires special tools. A quick check can be done the same way as the diff. The mainshaft (without the countershaft installed) should spin freely and not move in and out with the cases closed.

 

oh okay cool. I just ordered the type r style bearings and 1.45 80mm shim. Appreciate the help man.

 

To synchrotech, I decided to post here as my query has to do with the change from tapered bearings. I bought two new style bearings from you guys and when I installed them. The diff is sitting like 1-2 mm above the diff housing. Is that normal or do I have to grind some of the case off. It just seems higher than before with the tapered bearings. At first I thought the bearings weren't pressed on properly, but they're on all the way. I know a pic is worth a thousand words. I'm at work now, I'll post a pic when I get home. The this is when I drop in another diff (mfactory ls/b16 diff) in the same case. It drops lower and sits parallel to the diff case housing.

1. I don't have shims under the diff
2. When I put the countershaft in, it's actually sitting on the diff.

 

You will not need to grind the case for a ball bearing conversion. Have you tried to close the cases with only the LSD, bearings, and one top case shim (no shafts)? Does your quaife LSD have a part number stamped into it? I am out of the office but will be there for a few hours Monday morning if you want to call me.

 

Update: problem solved, apparently the diff that was in the box need a b16 non offset bearing at the bottom. I used the 40x80x18 bearing at the bottom and the diff dropped to the right height. After that was plain sailing. I used the offset bearing on the top and shimmed the rest. Differential clearance is within spec now and box assembled and bench shifting great. This was the first time for me to use two different bearings on a diff.

Thanks for your help the other day on the phone James. My speed gear was burred, that was the reason for eating the plastic speed sensors. Also I was looking at your synchotech service bulletin and my diff ring gear and my countershaft has three (3) notches on it. I didn't see that one in your service bulletin, can you help me identify?

 

Actually this is David but I will be sure to convey your thanks to James for the phone support.

Based on the set up you used it sounds like you may have installed an OEM viscous LSD and ring gear rather than a helical LSD. Did you happen to take any pictures?