Posted by Vaughn [172.69.140.165] on Wednesday, August 21, 2024 at 09:48:56 :
In Reply to: NP540 Overdrive Swap posted by Glenn [162.158.174.79] on Tuesday, August 20, 2024 at 14:45:40 :
These are your 5 speed O/D transmissions outside of what Kaegi mentioned:
NP540O (M) 6.06/3.31/1.84/1.00/0.82/6.42R Ford, GM, Chrysler, 1956-78
NP541O (M) 6.15/3.30/1.86/1.00/0.85/6.13R Ford, GM, Chrysler, 1957-69
NP542O (H) 6.15/3.30/1.86/1.00/0.85/6.13R Ford, GM, Chrysler, 1970-82
280VO (H) 5.98/3.50/1.86/1.00/0.80/5.04R Clark '68-85 up
300VO (H) 6.27/3.51/1.89/1.00/0.80/6.27R Clark '60-68
380VO (H) 6.27/3.55/1.89/1.00/0.80/5.11R Clark '68-75
400VO (H) 6.17/3.56/1.90/1.00/0.80/6.02R Clark '60-75
The Clark 400VO has the best ration between gears and may be used on the larger Dodge trucks. A transmission shop may be able to help narrow the vehicles down to what engine you have and input shaft you'll need. You'll also need to determine the bellhousing and what size bore is needed to use with the transmission you decide to use. Any parts you'll need if the trans shop you work with can't get it, contact the link, they will have it.