80's A998/A999 into Early A

Alright, so I spoke with Pat Blais who told me..

"Mike,

Now I get the picture: 1985 TF-998 or TF-999 to be installed behind the 1965 273. Problem is that the torque converter pilot hole at the rear of the early 273 crankshaft measures 1.51” I.D and the 1985 converter pilot measures 1.81” O.D. So the late model converter (1968+) will not install into the early type crankshaft (1964-67). Only two practical solutions to consider: 1. If you have the original 904 which was mounted to the 273 you could use the front pump assembly, front clutch assembly and rear clutch assembly with the 18-spline input shaft and simply transfer those 3 parts to the 1985 Torqueflite and use the 1965 converter which fits into the 1965 crankshaft recess. 2. (you don’t likely want to hear this !) – either remove the 273 crank and have the pilot hole machined out to 1.81” I.D. to accept the 1985 converter OR swap the 273 crankshaft for a 1968+ 318 crankshaft, forged or cast type will work.

TF-998 versus TF-999. The 998 was introduced by Chrysler in 1968, same year the converter pilot knob/crank pilot hole changed. The 998 was upgraded from the 904 by changing to a wider low-reverse, double-wrap type band, planetaries upgraded to 4-pinion versus 3-pinion in earlier models and the 27-spline input shaft. The TF-999 was introduced about 1974 and came with a wider second gear band and a front clutch drum that held a 5th friction disc and steel plate. It essentially was a “mini Hemi 426 Torqueflite”. In 1979 Chrysler introduced a low-gear planetary gearset along with a high numerical rear axle ratio (2.4 & 2.2) to meet the Federally mandated C.A.F.E. mileage requirements and still retain good off-the-line acceleration.

So you don’t need my bushing but you have a couple of decisions to make. The A-500’s are still available out here on the West Coast as well as the 727 size 518’s and 618’s. *

Thanks; let me know if I can be of further assistance with parts or information.

Pat"

Soooo.. Not usable? Unless I pull the 273, which I don't really want to do.