Guest Tim Romans Posted April 10, 2012 Share Posted April 10, 2012 Hey guys, Many thanks to all of you who chipped in with advice. I finally got my 41' started the other day. The old solenoid relay was basically shot so rather than pay through the nose, I disconnected the old starting system and retrofitted a single post on the starter and ran a wire to the starter relay and to a button. After priming the carbs and about 6 attempts, she fired right up and I drove her to the gas station for some fresh gas. The button seems to be working fine in place of the accelerator system. As I get ready for this spring and summer, I'm going to check the lubricant in the rear end. A couple of questions, the shop manual calls for 90w hypoid gear oil, but my scan of the local Advanced Auto Parts and Napa revealed that they didn't carry 90w. I saw a thread on here about substituting 85w and it working fine. Would this be ok for the 411 rear end that I have? Also, about draining out the old gear oil. How do you go about that? Jack the front of the car up, take the plug out, and use something like a turkey baster to get the rest?Cheers!Tim Romans Link to comment Share on other sites More sharing options...
Guest Grant Magrath Posted April 10, 2012 Share Posted April 10, 2012 Good work Tim!Re-the rear end, why not just unbolt the whole cover plate and make a new gasket for it when you put it back on?CheersGrant Link to comment Share on other sites More sharing options...
Guest dkhunt Posted April 10, 2012 Share Posted April 10, 2012 I agree with Grant... That way you can clean it out real good and a new gasket is always a good idea. Plus it would be a good opportunity for a visual inspection. ---I am here: http://tapatalk.com/map.php?dnximiSent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Ben Bruce aka First Born Posted April 10, 2012 Share Posted April 10, 2012 The oil will drain if the bottom bolt is removed. Ben Link to comment Share on other sites More sharing options...
Buicknutty Posted April 11, 2012 Share Posted April 11, 2012 There is not much difference between 85W and 90W oil, so there are no issues to using the modern hypoid oil in your diff. Plus with all the new lubricants, even the cheap stuff is better than they had back when our cars were new. Also, I'll second this, the housing is designed so that when the bottom bolt is removed the oil will drain out, though it certainly wouldn't hurt to the cover off to have a look, and do a good clean up. Those gaskets are easy to make if you don't have one handy, otherwise are available from several places. Keith Link to comment Share on other sites More sharing options...
FLYER15015 Posted April 12, 2012 Share Posted April 12, 2012 Tim,When I changed all the fluids in my '40, I used Mag One 75w-140w in both the rear end and the Tx. With over 1K on the clock last year, she seems to be fine.Mike in colorado Link to comment Share on other sites More sharing options...
Joseph P. Indusi Posted April 13, 2012 Share Posted April 13, 2012 If you remove the rear cover, mark it's position before removal. The rear end drain plug is not straight down but generally around 4-5 o'clock position. When refilled, you want the lube to just reach the center or bottom of the axle shaft.Joe, BCA 33493 Link to comment Share on other sites More sharing options...
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