When Pegleg needed a 16 spline yoke for his T85, his local driveline shop couldn't get one.  I checked my local shop, same story.  But the (late) owner of my local shop said he could take a truck yoke, the kind used on two piece driveshafts and unfinished OD, and turn the OD down to the 1 11/16 diameter to fit the bushing.  Worked fine, but Pegleg had to buy the new yoke and pay for turning it down.

John - "The Hoosier Hurricane"

The T86 in 55 and 56 used 16 spline with a 1.036 spline diameter. The same as a 3 speed without O/D for those years. The 57 and later used a 28 or a 31 spline. 28 spline was usually on a T86 of 57 or later.

Kenneth

Fredricksburg, Texas

What spline count does the light duty t-86 have?  How about the '55-'56 automatic transmissions? 

Check with some of the tbird parts houses, they get them at times for heavy duty T85s and keep an eye on ebay. The 31 splines you can still get new. The 16 splines can be tuff but their out there.

-Gary Burnette-

I'm pretty sure I counted 16 splines.

If the output shaft is 31 splines, then the yoke from a C6 automatic transmission will work.  I used one from a C6 that was behind a 352 which had the smaller ujoint (1310 series).  Many of the 390 equipped C6’s had a larger u-joint or a crossover u-joint (two different length crosses) which is fine depending upon what the driveshaft is requiring.  There are also some crossover ujoints available with two different size crosses that allows some additional interchangability.

Lorena, Texas (South of Waco)

First question would be

"How many splines are on the output"?

Oldmics

I have a T-85 OD that I'm planning to put behind my Y-Block but I'm missing the driveshaft yoke. What year yokes will interchange?  Thanks..Mark