I recently picked up a nice rebuilt T170 RTS trans (3 speed plus OD, standard central top mounted floor shifter, NOT the car-based SROD or the RUG) at a swapmeet, from a 1985 truck with a 300/6, and tried to install it- it went into the bellhousing perfectly, bolted up to the crossmember, and everything was going great until I realized the output shaft was a bit smaller and had a different spline count than my NP435 does. I double checked with my mechanic and apparently all that's needed to make this work is an appropriate slip yoke. I can't find a source of new or used yokes for this transmission much of anywhere.

What's confusing is that this trans supposedly came out of a 1985 F150 300/6 2wd longbed with a 2.47 rear end. My truck is a 1984 F150 300/6 2WD longbed with a 3.08 rear end. I didn't think that with everything else being completely bolt-in the output shaft would be different with only one year apart. Does anyone happen to know the part number I need to get a yoke that will fit the splines/shaft of a 1985 T170 RTS and a stock 1984 2wd u-joint? Or, alternatively, some solution to get this thing hooked up to the driveshaft if a new part isn't available.

Thanks!

 

Upper pic: Applications...Find what you want, then look at the slip yoke code.

Lower pic: Slip yoke codes to Ford part numbers.

Once you type the code, I'll post the page with the specs for it and etc.

Enlarge the pic by clicking on it twice.

* RUG SR-OD Single Rail 4 Speed Overdrive. 1978/83: F100/150 300/302 2WD // 1978/87 E100/250 300/302/351W /// 1977/83 misc. I-6 & V8 Ford/Merc Passenger Cars.

 

Thanks so much for that, I think the information might be on the previous page though? The first page shows "1980-89 F150 2WD cont'd", and has only the eight cylinder applications for overdrive transmissions listed. The New Process chart lists the six cylinder applications first so I think that my 3spd+od application, which came out of a six cylinder, was on the previous page ('85 six cyl, 2wd, RTS was the donor)

 

Previous...correct page.

 

Studying that page a bit, I'm not sure which one to ask for. All I know about the donor truck for my new trans is that it was an '85, 300/6, 2WD- not sure of the wheelbase for sure, or any other pertinent information. Would counting the splines on the output shaft and/or measuring its OD on the trans I'm attempting to put in help?

I'm also not sure of the wheelbase in inches for the truck it's going into (mine). I have an '84, single cab, long bed (133"?), 300/6, NP435, 2WD, 3.08 rear.

Unless I'm missing something, its likely going to need a 117 or 119 yoke, and a 41/42 front/rear u-joint?

 

117 = E1TZ-4841-B .. Yoke // 119 = E2TZ-4841-A ..Yoke

Pic: Specs for these two puppies:

 

The Certification Label on the driver's side door jamb has the wheelbase in inches on it, heading of WB.