Posted By |
Discussion Topic:
differential pinion rear bearing
|
|
thirtysixford |
07-19-2012 @ 6:35 PM
|
|
|
Member
Posts: 206
Joined: Oct 2009
|
ordered a bearing 18-4625-a from one of the smaller online houses. Their catalog did not say it was NOS or used, so I thought it would be new. Here is a picture of what I got.
|
ford38v8 |
07-19-2012 @ 8:45 PM
|
|
|
Senior
Posts: 2736
Joined: Oct 2009
|
Unless you wanted a pretty paperweight, it's what's inside that counts.
Alan
|
40 Coupe |
07-20-2012 @ 4:13 AM
|
|
|
Senior
Posts: 1646
Joined: Oct 2009
|
look at the rollers inside the bearing, they should be without any pits or heavy scratches. If they have any pitting the bearing is used. I do not know if this bearing is still available: 32-47 Pinion pilot bearing 18-4625-A Bower R-1304-BF
|
deuce_roadster |
07-20-2012 @ 9:35 AM
|
|
|
Member
Posts: 284
Joined: Oct 2009
|
If the rollers look good I wouldn't worry about the cage part that keeps the rollers away from each other, just clean it up. That particular bearing is a problem now. The replacements have soft "cage" parts that the hardend rollers will wear away. If you take a file and try to cut the original you will see it is hardened, the new ones which I think are only available from NTN are soft. I will be using a good used bearing instead of a new one in the rear I am assembling with new Timken bearings.
|
supereal |
07-21-2012 @ 11:12 AM
|
|
|
Senior
Posts: 6819
Joined: Oct 2009
|
C&G (800/266-0470) lists the pinion rear bearing as 18-4625-A. That bearing was used from 32-48. The bearing is installed with a driver, and the banjo housing should be heated before driving the bearing to prevent damage to the bearing. The housing will have to be heated to install the pinion bearing cup assembly, as well. The pinion bearings were not identical in the original use, and the bearing next to the gear was marked with the letter "P". Those bearings were usually sold as a set, and the newer replacements may not be marked. In any case, it takes a press to put the bearings and cup on the pinion shaft.
|