Posted by Dave on Thursday, March 18, 2004 at 1:39AM :
Hi folks. I have a clark CL455 tranny that actually seems to be all but a bolt in swap for the NP425. From what I can see I'd have to relocate 2 bolt holes and find a clutch with the right spline in 11" diameter. The problem I am having is fnding out what hte grear ratios are in this particular clark box. I have read "overdrive" and direct drive 5th, in which case it is like a 6.69 1st. Either way it seems like a "WIN" situation. Has anybody made this swap and does anybody know the ratios in an '84 GMC application??
Thanks in advance