Am thinking that this might be a dependable and different/unique ‘swap’ for an older truck. I have a 1939 Hudson 112 Model 90 pickup (pending rebuild/restoration), and think that the Cummins R2.8 w/AX15 (2WD/RWD) trans would work well together.
Have made inquiries to both Cummins, and to Advance Adapters. Nothing from Cummins as yet – other than the automatically generated emails. I did get a response from Vic Carroll (Advance Adapters). They do not market or have access to a 2WD AX15 transmission (?), however they appear to be in the midst of expanding trans adapters for the R2.8 (?).
It is a bit ‘early on’ in the rollout of the Cummins R2.8 diesel engine, hopefully Advance Adapters will follow through, expanding their offerings for ‘adapter kits’ for other transmissions.
The ’39 has manual center steering (as manufactured). At present, I am trying to determine the ‘weight difference’ between what the truck came with (175 cu in flathead inline 6) and the Cummins R2.8. The answer (when it comes), will have an effect on what direction this whole thing goes in – which (besides engine) might well include the front suspension, steering, etc.. I figure that there may be as much as 200 LB difference in weight – however that is pure speculation at this point.
The rear axle is, in my opinion, ‘toast’. Parts to rebuild it are just about impossible to obtain, and even if it were done – it would most likely not hold-up to the increased power / torque. Luckily, there are several differentials that would ‘fit’ under the rear of the truck, only requiring minor modifications, and would be more than adequate to handle the power/torque – and even have the same wheel bolt pattern/measurements.
Another of the ‘major issues’ is that of the AX15 transmission (no ‘new’ 2WD version available) – so selecting a workable transmission would be another stumbling block (and possibly flexibility between trans type (Auto/Manual).
Currently, planning on this project is purely thoughts, ideas and discussion(s) – almost nothing is ‘set in stone’. In-and-of itself, It is very daunting to a gray-haired Army retiree (stubborn fart, ‘older than dirt’ – LOL!)…
Other than planning and thoughts, I have done very little with my '39 Hudson 112 Model 90 pickup truck. I am still contemplating what to put 'under the hood', and how I am going to go about doing it. The Cummins R2.8L is, from my 'first look' a somewhat good 'fit' for reliability, power, and will be more than a bit unique in comparison to the normal SBC shoved between the rails of most 'restorations'.
I say I have done very little, (cleaning and repairing a few pieces), however, I have bought a scale - to weigh some of the Hudson engines I have in my workshop - just to see how they will compare (weight wise) with the Cummins R2.8L engine. That (the weigh-in) is coming, hopefully soon - but have other basic things to do around the workshop, in preparation for beginning to do 'projects'. Am also anticipating the 'shoe to fall' - i.e., the release & sale of the Cummins R2.8L, which was due earlier this year (delayed, due to CA emissions testing/qualification (?)).
The 1939 Hudson 112 Model 90 Pickup is more than somewhat unique and rare - try finding one, in ANY condition. An internet search will find a few - and you are sure to find pictures of my pickup truck among those images. Most of what you will see are NOT the Model 90, but the Model 98 (Big Boy, 3/4 ton), and you'll likely only find a couple of them. My estimate is that there are less than 20 of these pickups left, in ANY condition.
When I have a chance, I'll post a few photos of my Hudson pickups - yes, pickups. I have four at the moment - two (2) 1946 Hudson Pickups, and now two (2) 1939 Hudson Model 90 112 pickups (just acquired a second one, out of Colorado - last week).
