1965 Rear Axle Bearings - everything you need to know

[BuickGS65]

I wanted to post all the information I have about 1965 rear axle bearings, since there are differences among Skylark, Sportwagon & Gran Sport.

1965 GRAN SPORT & 64-65 SPORT WAGON BEARINGS
GM Part # 907717, 907690 or 391744
RW507AR (with retainer) or RW507A
Larger diameter than Skylark
No longer made(?) but harder to find at the very least!

1965 - 1967 SKYLARK
GM Part # 907664 or 907682
RW507C or RW507CR (with retainer)
Still made

1966 - 1968 GRAN SPORT & SPORTWAGON
GM Part # 907884
RW507G or RW507GR (with retainer)

Perhaps make a "sticky" thread?

[65GSConv]

So if a rear axle bearing goes out on a 65 Gran Sport, there is no repair option for it?

[WkillGS]

So if a rear axle bearing goes out on a 65 Gran Sport, there is no repair option for it?

There's a 'how-to' on Buicks.net. The GS/Sportwagon bearing has a larger OD than the 507C bearing....the article details how an adapter bushing was installed to fit the smaller OD 507C bearing into the larger GS/Sportwagon housing.

Some additional info....The 66-68 GS/Sportwagon used a RW507G bearing which has the RW507A bearings OD and also a larger ID for the bigger axles.
The 'R' suffix in the bearing # indicates it includes the press-on bearing retainer.
Finding the correct axle seal for these has been difficult in the past. Unsure what is currently available.

[Loren At 65GS]

I just did a google search for the RW507 AR and came up with multiple sources.  It appears to be in production ? [ take note of "?" ]
One listing is from a company called MIBearings LLC in Traverse City, MI.  Their listing shows the manufacture as Timkin . Need to call for a price.

 I don't know if these are American made or ?

  Loren

[GS66]

Should a guy be buying a couple of these to have on hand just in case?

[gssizzler]

I’ve done that already! Also not a bad idea to carry a set with on trips! In the emergency kit!

[WkillGS]

Should a guy be buying a couple of these to have on hand just in case?

Absolutely!
There are some 1965 RW507A's on eBay starting at $35. The 66-68 'G's' show up far less often.

[GS66]

Is the part # different for 66 Skylark Gran Sport?

[2x4 gransport]

I had a rear axle bearing go out last fall,couldn't find the correct one looked for three weeks, finally found a nos one in Washington state.💲💲💲

[BuickGS65]

Is the part # different for 66 Skylark Gran Sport?

Jim:

66-68 GS & Sportwagon are the same. GM # 907884.

I don't have the universal #.

[GS66]

Thank you! I did pick up 1 for the 65 so far.

[gssizzler]

To be safe you could do like my buddy does now after losing a bearing on a long road trip and having to pull the axle in the hotel parking lot! He takes a axle that already has a bearing pressed on it! Ready to go! Plus can carry a spare bearing in the tool kit!

[BuickGS65]

First post updated...

Walt - I couldn't find that post on Buicks.net - can you please provide a link?  Thanks!

[GS66]

OK, I secured some 65 ones, now need to find some for the 66.

[GS66]

I have the 65 ones now but need a pair for a 66. If anyone sees a lead let me know.

1966 - 1968 GRAN SPORT & SPORTWAGON
GM Part # 907884
RW507G or RW507GR (with retainer)

Thanks!