I am having trouble getting an axle bearing and seal for my 67 GS 400. Everyone wants to sell me an RW507C, which is slightly smaller than my bearing. My bearing measures 2.89 outside .700 wide and around 1.45 inside. It is a 507, but not a C. I can't remember the letter. Any help would be appreciated. Rich
Could it be a rw507ar,i was lucky and found the bearing number on the seal part of the bearing itself(.It was pretty small letters but once i cleaned the dirt it was easy to read .I got the bearings from Green Bearing in Ohio.
http://www.v8buick.com/showthread.php?t=58997&highlight=Olcar Heres a link about bearing is a 68 but the part numbers are close. Maybe this will help. I will go lool at my 67 GS axles that are out. I will need the same bearing when rebuilding the rear end. I found out the 2.93 posi and 3.36 open have different sized ring gear bolts? o No: :Smarty: What gear and size bolts are in your rear end? Is is a posi? Thanks Ed
The 66-68 Gran Sport and Sportwagon used RW507GR bearings. Some models of 66-67 LeSabre also used this bearing. Am fairly certain that the RW507AR was for 64-65 Sportwagon and 65 Gran Sport. The Gran Sport rears supposedly used larger ring gear bolts than the Skylark rear. Some confusion can come into play when rears have been swapped over the years. As long as you have the original 67 GS400 rear, it will need the RW507GR (GM #907884) bearing and seal #1376776 or equivalent (same seal as 66- early 67 LeSabre). I know the bearing is obsolete, so old stock will need to be found (=$$$$$). Places like CARS may have the seal. Presently I have a 67 GS400 and 68 Sportwagon that uses that bearing/seal combination. Not the greatest setup when you consider that they don't wear well and any replacements you find are likely to be very old and may not hold up as well as the original ones did. The 69 and later rears used bearings that were not sealed and lubed by axle oil. Unless you want the car to be 100% original, it may be better to swap to a later style rear. Just my 2 cents on this, Mark
Ok I just went out and checked the bearings on the axles out of the 67 GS400 rear end that was a 4 speed 3.36 open. One axle has a bearing number BCA RW507G it is a "G" and the other bearing is a Federal Mogul RW507D. The only seal number I can see is 9116S but I dont know if that is the correct seal. There is wear on the lip that extends out like it was not installed correctly. Each bearing measures 2.89 and .700 thick. I cant measure the inside because they are still on the axles. How easy is it to change to the newer stlye bearings?
The 2.93 posi had the larger bolts than the 3.36 open. I had to make small steel sleeves to fit into the 2.93 posi to make up for the space when using the 3.36 gear set and a spacer.
Looking through my parts book, the 67 GS400 rears were different. The 2.93 gear set was p/n 1396953 and Skylark ones were 1396927. The 65-67 3.36 rears all used p/n 1396803. What this may show is that the GS 2.93 had the larger bolts, but opting for the 3.36 got the smaller ones. Posi carriers for the GS/Sportwagon 2.93 & 3.23 were different as well. So, it is likely correct that you had to make shims for the posi unit bolt holes to fit the 3.36 gearset. Smaller bolt holes on the higher number gear sets is really puzzling. Why Buick had unique arrangements is anyones guess at this point. As to using the later bearings, I have heard that some rebuilders can modify the housings to accept them. However, just putting them in won't work to my knowledge as there is no machining in the axle tubes for a proper seal. There is a board member (Oph I think or something like that) who may have more information. BTW the "R" at the end of the bearing number means that the retainer is included. Mark
I was told that the FM # RW507D was super seeded by RW507ER. I will have the guy check his parts warehouse to measure the bearing in stock to see if it is the same as RW507D.
Thanks Mark, I know the rear end is out of a GS400 4 speed and matched the housing stamps the the manual to confirm it. I will check the parts numbers too.
bearing question Hey guys I had this trouble about about a month ago The bearing sezied in my 67 GS340 and chewed up the axle. I found a complete differental from a 67 GTO and for now swapped out the bad axle. I went to Akron bearing and after some searching I found the right one. The bearing number is for a federal mogal bearing number RW507CR and the seal is a chicago raw hide number 13492. Akron bearing was expnsive so I just ordered them through Advanced Auto parts. I know these fit. thanks Adam
The 67 GS 340 uses the Skylark rear which is different than the GS400 one. The RW507CR is used on the Skylark rears and not the GS400 one. Axles are different too. Pontiac used the RW507CR up to around 1972. Need to be specific here as it can cause problems. If a 66 Gran Sport or 67-68 GS400 (not GS340 or GS350) and any 66-68 Sportwagon (not Special Deluxe wagon) has the original rear it only uses the RW507GR bearing and seal listed above. Same goes for the axle shafts. The Skylark axles/bearings will not work in the housing. As to the RW507ER, I bought some of them by mistake and they don't look like they will fit. Try the following link for more info. bearing chart Mark
Jim, I have not but I will on Monday. I just started checking the bearings and seals today when I wanted to get parts to put the newly painted rear end together. I found an old post that said someone got a set for $44.00. I can tell you now I will be the next person to buy a set from them. Thanks for the help.
I don't know why you want to go thru this problem/hassle. Get an 8.5 and install it. You can grind of the "ears" to make it look like an 8.2 and only an expert will know. My friend who had the bearings listed here some time ago went thru this with his 67 GS400 and then his 68 GS400. From our discussion, just a bad idea from day one and better off in the long run (cheaper, better selection of parts) to go with the corporate 8.5 as Mark suggested in a previous post.
I had to replace one of the outter bearings on a '67 GS 400 posi rear and the only place I could get the bearing was from the gang at Classic Buicks. This was about 3 years ago. Dunno if they have any more in stock. Good Luck
I find all my obsolete Buick bearings from Olcar bearings. they are reasonable and have the parts nobody else has..
there is a place in quincy mass. called south shore bearing. he usually has everything. it is an older shop so he may have something like this. good luck.
Ol Car Bearing Rec'd my bearings today! :TU: I would recommend Ol Car Bearings to anybody needing a bearing that is hard to find. I think Green Bearing is out of business now.
