Diff I.D.

Old October 7th, 2018, 05:32 PM
Registered User
Thread Starter
Join Date: Jun 2018
Posts: 21
Diff I.D.

have a '69 Cutlass S that appears to have an oil leak @ the left axle. The plan is to replace axle seals/bearings (at least) @ both axles given I don't know the history of this vehicle.
I have not removed the diff cover (12 bolts) yet but made a note of casting #'s on diff housing & am seeking some answers as what diff I have. @ bottom of diff housing there is stamped: 402227 & "CFD 1" across from it.
On the other side of diff housing is a large "P" & at top of diff housing there appears to be a 270 stamped there. In what I can gather from limited research this is the "O" type axle from 1970 (?). For the purpose of getting the correct
bearing/seal kit can anyone confirm this to be the case ? Apparently, if I were to get a bearing/seal kit for a '69 it would not fit due to design changes that occurred in 1970. Also, where would I find a kit for my application?
Many thanks
Loucobalt is offline  
Old October 7th, 2018, 06:44 PM
Registered User
Fun71's Avatar
Join Date: Feb 2013
Location: Phoenix, AZ
Posts: 6,442
You can easily pull an axle shaft and verify if it's an open bearing and seal pressed onto the shaft (1970 style) or a sealed bearing pressed onto the shaft and an oil seal pressed into the axle tube (1967-1969 style).
Fun71 is offline  
Old October 7th, 2018, 07:13 PM
Registered User
monzaz's Avatar
Join Date: Jul 2006
Location: Richfield, Oh
Posts: 1,352
Oiled or seald bearing

Going by the casting numbers does not always work. Best way is always Physical pulling of the axle shaft as stated.
402227 - is supposed to be a 1970 casting... which means usually a OILED bearing system with the seal ON the axle shaft out board the bearing.
If you need bearings and seals for either we have the kits
for one side or both sides for sealed or oiled which ever you have.
Just PM and will help. You can send pictures if you are still unsure after pulling the axle shaft.
It is not a big deal - pull the tire pull the drum remove the 4 retaining nuts with the access drilled holes in the axle shaft wheel mounting flange and yank that axle out. Fluid should stal in as long as you jack only one side up at a time.
J D Race
monzaz is offline  
Old October 8th, 2018, 06:40 AM
Registered User
Thread Starter
Join Date: Jun 2018
Posts: 21
Gentlemen, thanks for the quick & informative responses. Will pull the axle shaft & inspect.
Loucobalt is offline  
Related Topics
Thread Starter
Last Post
Parts For Sale
February 1st, 2008 08:13 AM
Small Blocks
May 31st, 2007 04:33 AM
Big Blocks
April 8th, 2007 06:02 PM
March 12th, 2007 03:42 PM
August 10th, 2003 10:12 PM

Thread Tools
Search this Thread
Quick Reply: Diff I.D.

Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.