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Borg Warner 3 speed transmission with overdrive

Posted By Studebaker Dean Saturday, April 17, 2021 9:35 AM
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1966 N700 CrewCab
 Posted Thursday, April 29, 2021 12:29 PM
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I have 2 of these transmissions in 1966 F100 trucks plus 2 spares and a bunch of NOS parts. Really like these transmissions! My 1966 F100 Ranger was getting 22+ mpg bone stock, then I decided to clean up the truck a bit. It turned into a full blown frame off resto . . Chassis now done but gotta find time and energy to paint it.
Studebaker Dean
 Posted Sunday, April 18, 2021 1:35 PM
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Thanks Steve - I spent much of today looking for my Borg Warner "Official Guide to the R-10 and R-11 O/D" booklet - found it!
There is a short section on using "Reverse" and it says that the "Freewheeling clutch must be locked out". Apparently to accomplish this there is a shaft/rod built into the transmission so that when placing trans in reverse it will lockout freewheeling clutch in O/D.
With this info I'm thinking that the shaft/rod is either broken or jammed causing my two problems - 1. can't put transmission in reverse lever on trans is jammed and 2. the O/D lever won't move either using the cable or trying to move lever on the unit by hand.

I appreciate the comments received so far. Even if not providing exact answers it has been thought provoking. My Studebaker shop manual wasn't much help, but maybe the parts book will shed some light.

By the way -nice Autocar. I have a soft spot for the orphan vehicles.
Wolfcreek_Steve
 Posted Sunday, April 18, 2021 9:44 AM
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I don't think leaving the OD in overdrive will cause damage. The overdrive unit has an overrunning clutch, that when in high range, won't transmit power through the unit when turning backwards.
I suspect that one of the shift levers is bound up (maybe in between gears)
Years ago I had a Ford Pinto that would get stuck between gears, (selector pin was worn and would slip between the shifting forks) I had to remove the trans cover, pry everything back into position) then it would work fine until the next hiccup. It was in a Triumph TR4 so it was easy to get to. I got enough practice so I could fix it at night in the pitch dark, just by feel. (wasn't smart enough to replace the pin or carry a flashlight)

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“He, who is without oil, shall throw the first rod” Compressions 8.7:1
Steve Peterson
Central Wisconsin

Follow The Leaders For They Know The Way AUTOCAR
Studebaker Dean
 Posted Sunday, April 18, 2021 8:55 AM
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Thanks Geoff,
Even though the O/D lever is engaged it no longer free-wheels, so as you've suggested I'll continue with trying to free up that O/D lever

I know you shouldn't leave the O/D lever engaged when you backup and I've done really well with that up until now, but I think that's what I did and damaged the cluster gear (or?) to the point where I can't move the O/D lever. There aren't many (any?) shops nowadays that have experience in the 3 speed manual transmissions let alone the O/D units. This unit is fun to drive/operate but if problems occur they aren't cheap or easy to repair.
Geoff Weeks
 Posted Sunday, April 18, 2021 1:41 AM
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Because the O/D "freewheels" when engaged (power can go from the engine but the axle can't drive the engine) I would focus my efforts in getting the OD to shift in an out then move on to the transmission. I don't have much other help.
Studebaker Dean
 Posted Saturday, April 17, 2021 9:35 AM
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Fingers crossed - I have a Studebaker half ton pickup with V8, 3 speed borg warner T85 trans with O/D, and I'm having issues and hoping someone has some advice for me.
I cannot shift into reverse and cannot disengage the O/D with the cable. I removed the linkage from the low/reverse lever on the trans but not able to move lever at the transmission, (maybe stuck in first?) However, I still can put shift lever in first gear, shift to second and third with no issues. I also disconnected the O/D cable from the O/D lever (at trans) and I'm not able to move that lever either. Any ideas on the problem are appreciated.

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