Posted November 17, 20195 yr comment_587809 I’m replacing the oil seals on a R200 3.90:1 differential that I bought on Craigslist last year. I have a “tool” for driving in the side oil seals, but not for the front oil seal. Instead of hunting for what I need to do the job, can I just use the companion flange and a wood block & hammer to safely drive the front oil seal into place? If my idea is likely to mess the seal up, I’ll hunt for the right thing to do the job. Thanks for your advice! Old front seal and companion flange shown in picture below. Link to comment https://www.classiczcars.com/forums/topic/63164-differential-front-oil-seal-installation-question/ Share on other sites More sharing options...
November 17, 20195 yr Author comment_587811 Here’s another view of how the two surfaces meet. The lip of the companion flange covers the raised part of the seal and nearly contacts the outer flat part of the seal. Edited November 17, 20195 yr by SoCalJim Link to comment https://www.classiczcars.com/forums/topic/63164-differential-front-oil-seal-installation-question/#findComment-587811 Share on other sites More sharing options...
November 17, 20195 yr comment_587813 I have no idea but on a different note. How did you hold the flange to unbolt it? There is a Nissan special tool. Also how do you plan to hold it to torque it back? I was thinking about doing this to the R200 currently on the bench but was hesitant to try to pull off the flange. I thought I might just do the side seals. Do you know what the parts numbers are for the side and front seals? Link to comment https://www.classiczcars.com/forums/topic/63164-differential-front-oil-seal-installation-question/#findComment-587813 Share on other sites More sharing options...
November 17, 20195 yr Author comment_587822 SoCalJim Tool #280Zdiff - 5’ long piece of scrap plywood with appropriate holes cut into it, along with M8x30mm bolts and lock nuts. ? I bought all the seals from Motorsport Auto. The front seal is shown below. I don’t have the side seal p/n handy. Link to comment https://www.classiczcars.com/forums/topic/63164-differential-front-oil-seal-installation-question/#findComment-587822 Share on other sites More sharing options...
November 18, 20195 yr comment_587834 That's a good idea! Link to comment https://www.classiczcars.com/forums/topic/63164-differential-front-oil-seal-installation-question/#findComment-587834 Share on other sites More sharing options...
November 18, 20195 yr Author comment_587836 Thanks Charles! I was going to fab the tool to be like what’s shown in the FSM, using aluminum stock. But, I dragged out the piece of plywood to use instead. Quick and easy! I also used it to remove the drain & fill plugs. I just bolted the diff cover to the plywood, stood the plywood upright on its long edge, and used my breaker bar & cheater pipe to loosen the plugs. Edited November 18, 20195 yr by SoCalJim Link to comment https://www.classiczcars.com/forums/topic/63164-differential-front-oil-seal-installation-question/#findComment-587836 Share on other sites More sharing options...
November 23, 20195 yr comment_588116 I believe the side seals are 38342-n3100 As a side note, I was just going to order new cover studs but they are NLA 38354-p6600 Link to comment https://www.classiczcars.com/forums/topic/63164-differential-front-oil-seal-installation-question/#findComment-588116 Share on other sites More sharing options...
November 23, 20195 yr Author comment_588145 Thanks Charles. ? Link to comment https://www.classiczcars.com/forums/topic/63164-differential-front-oil-seal-installation-question/#findComment-588145 Share on other sites More sharing options...
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