Thread: Differential Pinion Seal Help needed

I checked the CBC bearing book and early series 1 have a different seal to late series one. I suggest looking at John Craddocks website , he may have more info on which seal fits what and an interchange from the part numbers that you already have.

Ian
Bittern

I believe the seal changed in Aug 49 when the long-nose diff was replaced by the now familiar Series diff.
.W.

An alternative approach would be to take the bearing/seal retainer and the drive flange to a local bearing supply company. It is likely that they have or can order in a correct seal.

Bear in mind that it is quite possible that the differential is no longer the one originally fitted - any Series diff except a Salisbury is interchangeable except the One Ton (and there are almost certainly none of these here) or some FC ones.

If you have the Rover part number, some bearing suppliers can cross reference this, but note the caution above.

G'day Jeff,

This is what I do when confused over P/N's for oil seals.
Measure accurately ( calipers are accurate enough) the seal housing inside diameter and it depth to the shoulder. Also the flange seal area diameter. Go to a bearing shop and give them these "housing and shaft" measurements. They will be able to give you the correct seal that will fit.
You have a choice of Nitrile or Viton rubber. Viton is 5 times more expensive however, resists going hard when used with Sulphur based EP oil.

Good luck!
Chris

I have always just taken the old seal , flange & O/S dimension by measuring were it fits in the diff, to CBC & bought them there . I have had 3 X S1's & replaced the seals in all 3 without a problem. I usually also fit speedy sleeves while I am at it just to be on the safe side.

For those who may be interested, theNational Seal 410183-N has thecorrect1-3/4” x 2-3/4” x ½”dimensionsare a good quality Pinion seal at $15.00ea + GST.regards
Jeff

1 x National Seal 410183-N $15.00ea + GST.
1-3/4” x 2-3/4” x ½”

Originally Posted by JDNSW

An alternative approach would be to take the bearing/seal retainer and the drive flange to a local bearing supply company. It is likely that they have or can order in a correct seal.

Bear in mind that it is quite possible that the differential is no longer the one originally fitted - any Series diff except a Salisbury is interchangeable except the One Ton (and there are almost certainly none of these here) or some FC ones.

If you have the Rover part number, some bearing suppliers can cross reference this, but note the caution above.

Fully agree with John here. Just take your old (however trashed) seal to a bearing supplier (Statewide Bearings or similar) and they will measure it up and find you a replacement. In Bunbury it is usually off the shelf and quite reasonably priced.

Chris

Yes, that is exactly when I did in the end. The guys at StateWide Bearings were super helpful and after inspecting the running surface on the drive flange, suggested Speedy Sleeves as well. I came away very happy but still a bit upset that a number of "respected" LR parts dealers are selling seals that are clearly incorrect. I must be the only person to discover this.

cheers
Jeff