Moparmike Posted February 10, 2022 Share Posted February 10, 2022 anybody have the part number for the oring that goes in the side cover on the mack rearends driver side cover 4 bolts I'd really appreciate it means has developed a little leak thanks guys Quote Link to comment https://www.bigmacktrucks.com/topic/69186-o-ring-in-side-cover-2000-rd688-rearend/ Share on other sites More sharing options...
R.E.D Posted February 10, 2022 Share Posted February 10, 2022 (edited) Can't help with part number, but there are two kinds of covers plastic and aluminum.. plastic cover oring is thicker than aluminum.which one do you have? Edited February 10, 2022 by R.E.D Quote Link to comment https://www.bigmacktrucks.com/topic/69186-o-ring-in-side-cover-2000-rd688-rearend/#findComment-489090 Share on other sites More sharing options...
MACKS Posted February 10, 2022 Share Posted February 10, 2022 There’s another thread on this same exact thing very recently .. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/69186-o-ring-in-side-cover-2000-rd688-rearend/#findComment-489093 Share on other sites More sharing options...
Moparmike Posted February 10, 2022 Author Share Posted February 10, 2022 hey thanks I found the other post my cover is aluminum thank you Quote Link to comment https://www.bigmacktrucks.com/topic/69186-o-ring-in-side-cover-2000-rd688-rearend/#findComment-489096 Share on other sites More sharing options...
mechohaulic Posted February 11, 2022 Share Posted February 11, 2022 4 hours ago, R.E.D said: Can't help with part number, but there are two kinds of covers plastic and aluminum.. plastic cover oring is thicker than aluminum.which one do you have? i first read this post and thought you were joking! a PLASTIC side cover, guess i've been away from the wrenches too long. Quote Link to comment https://www.bigmacktrucks.com/topic/69186-o-ring-in-side-cover-2000-rd688-rearend/#findComment-489123 Share on other sites More sharing options...
R.E.D Posted February 11, 2022 Share Posted February 11, 2022 1 hour ago, mechohaulic said: i first read this post and thought you were joking! a PLASTIC side cover, guess i've been away from the wrenches too long. Yea it's some kind of plastic..has brass spacers molded at the four bolt holes as to not crush the cover by over torquing them...the fill hole plug is rubber and snaps in like the plug on a front axle wheel hub..they get brittle and brake while removing...I changed mine to aluminum about ten days ago wheel I had my rear end rebuilt. Quote Link to comment https://www.bigmacktrucks.com/topic/69186-o-ring-in-side-cover-2000-rd688-rearend/#findComment-489128 Share on other sites More sharing options...
Onyx610 Posted February 11, 2022 Share Posted February 11, 2022 56AX423 (9” ID)/metal cover 1 Quote Link to comment https://www.bigmacktrucks.com/topic/69186-o-ring-in-side-cover-2000-rd688-rearend/#findComment-489147 Share on other sites More sharing options...
Joey Mack Posted February 11, 2022 Share Posted February 11, 2022 the plastic side cover is real,,, thanks to Volvo.... jojo Quote Link to comment https://www.bigmacktrucks.com/topic/69186-o-ring-in-side-cover-2000-rd688-rearend/#findComment-489178 Share on other sites More sharing options...
R.E.D Posted February 12, 2022 Share Posted February 12, 2022 2 hours ago, Joey Mack said: the plastic side cover is real,,, thanks to Volvo.... jojo Yea I figured.. cutting corners..I bet they figured the aluminum last too long , therefore they made plastic which becomes brittle and brakes while removing.then they charge an arm and leg at the stealership for another plastic one.lol.only way they get us to stop rebuilding and repairing our older equipment is to make replacement parts with lower quality and prices higher than giraffe 🦒 p***y... excuse my French. Red Quote Link to comment https://www.bigmacktrucks.com/topic/69186-o-ring-in-side-cover-2000-rd688-rearend/#findComment-489193 Share on other sites More sharing options...
Joey Mack Posted February 12, 2022 Share Posted February 12, 2022 one thing that was done that I really like, is that they added a 3rd bolt inside the carrier housing.. jojo Quote Link to comment https://www.bigmacktrucks.com/topic/69186-o-ring-in-side-cover-2000-rd688-rearend/#findComment-489195 Share on other sites More sharing options...
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