RockitRiviera Posted June 1, 2015 Share Posted June 1, 2015 I'm about to install the rear diff back to the frame. I haven't put any fluid in it yet. But when I was looking at it today...the fill spout is very low. It doesn't seem to be enough if I just fill it to level. Should I tip the differential back to fill some more? Just curious...and is there a break in procedure? Link to comment Share on other sites More sharing options...
alini Posted June 1, 2015 Share Posted June 1, 2015 Due to the mass of the gears in the differential the amount of fluid is actually quite hi compared to what you think and the gears throw the oil everywhere. It will be fine. 1 Link to comment Share on other sites More sharing options...
RivNut Posted June 1, 2015 Share Posted June 1, 2015 All the hot rod guys think that running a Ford 9" rear end or a GM "12 bolt" rear end is about as beefy as you can get. The ring and pinion in your first generation Rivieras is a 9-3/8" 14 bolt unit. Pretty stout. Link to comment Share on other sites More sharing options...
RockitRiviera Posted June 2, 2015 Author Share Posted June 2, 2015 Thanks Alini...I was sort of worried about the axle bushings/sleeves at the outward ends of the axles....pretty far away from the sloshing of the gear oil/ring/pinion gears. But I'll trust you. Link to comment Share on other sites More sharing options...
alini Posted June 2, 2015 Share Posted June 2, 2015 The axle bearings are not lubricated by the oil in the axle housing. The axle seals are actually inboard of the bearing. Link to comment Share on other sites More sharing options...
RockitRiviera Posted June 2, 2015 Author Share Posted June 2, 2015 I agree, the bearings are prelubed and sealed...the seals are inboard...but I thought they needed some lube. I'm sure the guy who rebuilt the rear end lubed them up. I had to replace those seals because they were spun out. We had to have a machinist build them as there are no replacements available Link to comment Share on other sites More sharing options...
MDG Posted September 11, 2022 Share Posted September 11, 2022 I need help locating 3:50 or 3.89:1 posi third member for my 64 Buick Riviera. Link to comment Share on other sites More sharing options...
MDG Posted September 11, 2022 Share Posted September 11, 2022 On 6/1/2015 at 11:15 AM, RivNut said: All the hot rod guys think that running a Ford 9" rear end or a GM "12 bolt" rear end is about as beefy as you can get. The ring and pinion in your first generation Rivieras is a 9-3/8" 14 bolt unit. Pretty stout. I agree. I'm in need of a taller gear ratio for my 64 Buick Riviera. Looking for posi too. Any help locating a 9 3/8" would be greatly appreciated. Link to comment Share on other sites More sharing options...
1965rivgs Posted September 11, 2022 Share Posted September 11, 2022 11 hours ago, MDG said: I agree. I'm in need of a taller gear ratio for my 64 Buick Riviera. Looking for posi too. Any help locating a 9 3/8" would be greatly appreciated. The most readily available "tall" gear is a 3:42. If you want an even taller gear Buick made available others for the 9 3/8ths rear but the most likely you will find is a 3:91...but "likely" and "3:91" are not synonymous terms. Tom Mooney Link to comment Share on other sites More sharing options...
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