Soundguy
Old Timer
- Joined
- Mar 11, 2002
- Messages
- 51,575
- Location
- Central florida
- Tractor
- RK 55HC,ym1700, NH7610S, Ford 8N, 2N, NAA, 660, 850 x2, 541, 950, 941D, 951, 2000, 3000, 4000, 4600, 5000, 740, IH 'C' 'H', CUB, John Deere 'B', allis 'G', case VAC
so if gear oil is "okay" to use in the trans or diff....then i assume there is no so-called "yellow metal" in the NAA. some have written about this metal being damaged by GL-5 oils?
The 9n, 2n, and 8n have a scotch yoke belly pump plumb full of yellow metal.... that's why you see the comments about using yellow metal safe oils in pre53 fords.
soundguy