diesellibrarian
SILVER Star
Hi all -
I've done the requisite searching and FAQ-ing, and I can't find a clear answer to this question, so I'm looking for some advice.
I have an 11/71 FJ40 with three-speed and stock transfer case. The truck came without a front driveshaft, so I sourced a used one which I believe is from a '74 or later FJ40. I've just discovered that the flange nut spacing changes sometime in '73 to 60mm from 56mm, so the replacement shaft won't fit the T-case.
The plot twist is that I'll likely be swapping in a third member from a '74 and later FJ40 into my front axle housing, I'm likely to have 56mm spacing at the t-case, and 60mm at the axle. So, these are my questions:
I've done the requisite searching and FAQ-ing, and I can't find a clear answer to this question, so I'm looking for some advice.
I have an 11/71 FJ40 with three-speed and stock transfer case. The truck came without a front driveshaft, so I sourced a used one which I believe is from a '74 or later FJ40. I've just discovered that the flange nut spacing changes sometime in '73 to 60mm from 56mm, so the replacement shaft won't fit the T-case.
The plot twist is that I'll likely be swapping in a third member from a '74 and later FJ40 into my front axle housing, I'm likely to have 56mm spacing at the t-case, and 60mm at the axle. So, these are my questions:
- will the '74 later driveshaft be the right length? Like, will it fit at all? Or will I need to source a 69-73 shaft?
- if I keep the stock t-case but run the later diff, I will need two different flange spacings (56mm on the case end and 60mm on the axle end), correct?
- are the male and female ends of the shafts interchangeable between the 69-73 and 74-79 shafts? ie same length/spline count etc? And if so, can I assemble a "frankenstein" drive shaft using parts of the earlier and later shafts?
- OR should I swap an earlier pinion flange onto the later third? Are earlier and later pinion flanges interchangeable?