Samurai 20V Posted November 9, 2011 Share Posted November 9, 2011 (edited) Hi guys.. I have my TRD LSD on order, fitment will be done next month.. I want to confirm on the required supporting parts required to swap the diffs over.. I know the side bearing and oil seals need replacing, but the service manual states there are many more non-reusable parts, as below.. Do I need all of them? Thanks guys.. Edited December 6, 2011 by Samurai 20V (see edit history) Quote Link to comment Share on other sites More sharing options...
sdistc Posted November 9, 2011 Share Posted November 9, 2011 (edited) When I bought mine, I also purchased the accompanying rebuild kit from MVP that included all seals and necessary parts. edit: from MVP's site: "TRD LSD Installation Kit for 1993-98 Supra Part # To LSD Kit When you purchase a TRD (or any brand) LSD, you rip out your stock differential to replace it with the LSD. When you replace the differential, there are a few Toyota OEM parts you should always replace at the same time (just like doing a clutch or engine). This is every part you should purchase when doing an LSD, all in one kit MVP has put together. This kit includes 2 bearings, 2 seals, 2 O-rings, and Toyota FIPG sealant (a.k.a. Toyota Black). Please choose if this is for the TT Auto, N/A Auto or 5-speed, or the TT 6-speed." Edited November 9, 2011 by sdistc (see edit history) Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted November 10, 2011 Share Posted November 10, 2011 Depends whether it needs shimming up, which in turn depends on wear and production tolerances. If it does need shimming you need to know exactly what you are doing, getting the preload right and the contact pattern right is daunting the first few times, and you need decent calibration equipment like very low capacity torque wrench, and dial guages and magnetic stands. If you are happy to just throw it in and hope you need two side bearings, two snap rings, and two side bearing seals. The seals and bearings differ small to large diff. Can't remember if the snap rings differ, you would need to check on the EPC. Quote Link to comment Share on other sites More sharing options...
Samurai 20V Posted November 10, 2011 Author Share Posted November 10, 2011 Hey Chris. Thanks for the reply.. I am giving the job to a Toyota dealer to do, they should know about this stuff.. Which are the parts I should buy in advance? (I get a discount) If it needs shimming I guess they have to take measurements and order parts accordingly? Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted November 10, 2011 Share Posted November 10, 2011 I would get the correct size bearings, side seals and snap rings for the size of diff you are converting. Any shims will need ordering once the correct thicknesses are ascertained. If the pinion shaft needs disturbing to change depth of engagement or preload you need a new crush spacer. It's shown as "spacer" to the right of the oil slinger. They are one size and are crushed as you tighten the pinion nut to get the right bearing preload torque. If it needs fiddling with I would fit two new pinion bearings. Hopefully it won't as it gets costly and time consuming, and to be honest most main agents won't have a clue how to do it properly. Race shops do this sort of thing all the time, they will be able to do it in their sleep. Quote Link to comment Share on other sites More sharing options...
Samurai 20V Posted November 10, 2011 Author Share Posted November 10, 2011 I would get the correct size bearings, side seals and snap rings for the size of diff you are converting. Any shims will need ordering once the correct thicknesses are ascertained. If the pinion shaft needs disturbing to change depth of engagement or preload you need a new crush spacer. It's shown as "spacer" to the right of the oil slinger. They are one size and are crushed as you tighten the pinion nut to get the right bearing preload torque. If it needs fiddling with I would fit two new pinion bearings. Hopefully it won't as it gets costly and time consuming, and to be honest most main agents won't have a clue how to do it properly. Race shops do this sort of thing all the time, they will be able to do it in their sleep. I have been to the shop with diagrams and the owner says they can do it, but I have my doubts after reading this... I will take the diagrams/service manual and parts there to reconfirm... Thks. Quote Link to comment Share on other sites More sharing options...
Samurai 20V Posted November 15, 2011 Author Share Posted November 15, 2011 I have been to the shop with diagrams and the owner says they can do it, but I have my doubts after reading this... I will take the diagrams/service manual and parts there to reconfirm... Thks. Ok, so on Chris's advice I rechecked with the agent if they know how to do this properly, and it turns out they don't.... They are aware of all the procedures to do it but dont have anybody that can do it.. They are checking around here if anybody can do this, but it is a niche market in Japan, most people just buy new cars here.. So I am stuck now.. Luckily TRD dont have stock of the diff so I cancelled the order for now... I am in South Africa in December, I will do some checking if there is anybody who can set up this diff properly. Other than that, does anybody knows a decent race shop in Japan?? Quote Link to comment Share on other sites More sharing options...
Samurai 20V Posted November 15, 2011 Author Share Posted November 15, 2011 Ok, TRD will do the install for me! Just waiting on the price.. Quote Link to comment Share on other sites More sharing options...
Samurai 20V Posted December 6, 2011 Author Share Posted December 6, 2011 Ok, the TRD shop gave me a quote to install, came to 333000yen, around 2500GBP...That includes the cost of the LSD and supporting parts. The item I find strange is they are quoting for new driveshafts, complete with inboard and outboard joints... Surely there is no need to change the shaft and outboard joint? If I look at the diagram above surely just the side gear shaft at worst would need to be replaced? Quote Link to comment Share on other sites More sharing options...
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