Attached are photos of the front and rear axle/diff cover to help identify the axle year or year range so we can select the appropriate ARB Air Locker model. A couple of notes:
Any input would be greatly appreciated.
- The truck is a 1970 - I believe the rear axle is original based on the records I have, but could be mistaken.
- I believe the front axle is a used period correct replacement - I'm not 100% sure on that.
- I measured the bolt studs on the steering knuckle and the measurements that I got off my truck indicate the front axle is a pre 1978. The link explaning these technique for identifying the axle year is below.
- Steering Knuckle 101....(FAQ) - https://forum.ih8mud.com/threads/steering-knuckle-101-faq.117942/
- From what I've read and what ARB told me - stock axles for a 1970 FJ40 would require ARB Air Locker part numbers:
- Rear - RD153, for a semi float
- Front - RD142, for a full float
- However - as you can see in my photos - both of my diff covers are 10 bolt and the spec.s for both the RD153 & the RD142 indicate a 12 bolt....
- I believe the RD132 is for a 10 bolt but my understanding is that's not typically stock on the 1970 FJ40
Any input would be greatly appreciated.