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Grand Am/IMSA Data Guy
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Rear wheel bearing source needed
Hi Gang
I have been reading some prior threads on wheel bearing failures and sources for different bearings. I have been chasing a problem on my car for a couple of years. I have replaced banana arms, machined them to bring the bore back into spec, added large metal rings (in place of e-brake set-up) to add strength etc. My car is an 84 and only used for track (DE and a little vintage). My parts sources (Westex and SSF) both send the same bearing SKF 305988D. Last summer I bought a pair though the Porsche dealer, they were exactly the same numbers, different box and 2x price, as my suppliers. I noticed on a prior thread that someone used a p/n SKF 309609ad, and someone included a photo of a bearing made in Italy. I need to find better quality/durability bearings. Any help finding a source would be greatly appreciated. Thanks
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Jerry Austin AIM Data Products Dealer 84 911 3.6 track car - Sold Morris Minor Van with S2000 running gear http://austinmotorsportsllc.com/ |
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Registered
Join Date: May 2004
Location: Encinitas (San Diego CA)
Posts: 4,495
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UMMMM, Pelican sells virtually ALL Porsche parts? Why don't you call them???
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1971 RSR - interpretation |
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Join Date: Jul 2002
Location: Mercer, PA
Posts: 782
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BOUGHT MINE FROM PELICAN PARTS.
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Registered
Join Date: Oct 2002
Location: St. Louis region
Posts: 3,147
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I've got a pair of rear wheel bearings sitting here, recently purchased from our host. SKF, # 305988D, made in Spain. Unless this bearing also fits something else, I doubt if you're going to find anything better. Any chance you're damaging them when installing?
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Deceased: Black '88 Carrera Coupe, Steve Wong and Russell Berry chips, Dansk premuffler, custom MK GT3-style muffler, Magnecores. Al Reed 7 & 8 X 16 Fuchs. Full Elephant Racing suspension, 21/28 T-bars, Turbo tierods, bump steer kit, Bilstein Sports, BK strut bar. Ruf bumpers, 935 mirrors, Carrera 3.0 tail, DasSport bar. '11 BMW 328iX, '18 Nissan Frontier 4X4, '92 Acura NSX. |
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Bird. It's the word...
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I think Jerry was asking for help in relation to brands and opinions... I suspect he knows where to buy them
![]() The originals in my car were FAG, and I had a choice of Timmken (sp) or SKF to replace them. I went with the SKF and no problems so far. The threads I read flagged a possible issue with outer diameters of the various brands (we're talking fractions). I also used a bearing retainer compound to be sure.
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John Forcier Current: 68L 2.0 Hotrod - build underway |
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Grand Am/IMSA Data Guy
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Wavey
I have been replacing these wheel bearings for a number of years, on many different 911's. I have all of the correct tools. I am confident I am doing them correctly. That said, the units from SKF (305998D) just do not hold up to the strain on the track using Michelin Sport Cups, or Hoosier racing slicks. I am looking for a bearing that has proven to hold up better than the "Spain" version. I am very leary of just ordering replacement because 3 different sources have sent me the 305998D, and now you say PP sells the same. Hoping that someone has a source. Thanks and keep the info coming
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Jerry Austin AIM Data Products Dealer 84 911 3.6 track car - Sold Morris Minor Van with S2000 running gear http://austinmotorsportsllc.com/ |
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Join Date: May 2001
Location: Peoples Republic of Long Beach, NY
Posts: 21,140
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I have no hard experience on this so
afaik, based on a BusinessWeek article, the Timkin Brg mfg spends the most on R&D, has the most expensive facilities, etc, and produces the finest bearing in the world. I also got a heads up from a bearing pro, that was visiting this site, when I asked him about my info. He said that on your street car SKF is good enough. I may be able to search his name if you need it later and get his view on a track car ? also fwiw, is this issue due to grease failure ?
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Ronin LB '77 911s 2.7 PMO E 8.5 SSI Monty MSD JPI w x6 |
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Join Date: Nov 2004
Location: Greater Metropolitan Nimrod, Oregun
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I went to college (Crass Western Perverse Univ. -- aka "Case") with a Timkin offspring and ... they are very proud of their bearings.
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"A man with his priorities so far out of whack doesn't deserve such a fine automobile." - Ferris Bueller's Day Off |
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