I have a 3 spd overdrive from a 1/2 ton (55-59), and it looks to be the
same
length as the standard transmission. I don't have a regular non overdrive
tranny to confirm the measurements. I have a parts book and will look to see
if the driveshaft for the overdrive is a different part number.
If someone does have the length of the talishaft for the non overdrive
transmission, it will be easy for me to confirm whether or not the driveshaft
length will have to change. I don't think it does.
If you don't have the parts for the column shift, I would just use a
floor
shift. Old column shifters can be a pain to get set up properly.
The transmission freewheels when it is in the overdrive mode.
Bob
On Sunday 11 December 2011 10:37, William Schickling wrote:
> Bob,
>
> I wish I had more info for you. I had a 52 3/4 ton with this conversion. I
> loved it. It had a toggle switch on the dash for the overdrive. It
> freewheeled half of the time. I don't remember which (overdrive in or out).
>
> Since mine was an open drive conversion from closed drive it definitely had
> a new drive shaft and rear-end. Mine was on the column and it was a blast
> to drive. I can compare it to my 1940 3/4 ton. Top Speed on the 40 is about
> 40, maybe 45. The 52 could do 55 to 60. I should never have sold that
> truck :)
>
> The column shift used arms on the steering column. Is that still there or
> do you need a new column?
>
> Bill (Haven't replied to a list serve email in too many years) Schickling
>
>
>
> Sent: Sunday, December 11, 2011 1:24 PM
> To: Oletrucks (oletrucks)
> Subject: [Oletrucks] 3 speed overdrive conversion
>
> Happy Holidays everyone. I just acquired a 3 speed od trans that came out
> of a 57 Chevy sedan engine unknown. I am thinking of installing it in my
> 56 = ton which at some point was converted from 3 speed column to 4 speed
> floor. I have a 235 6 cyl engine.
>
>
>
> Has anyone done this? I havent measured, but Im guessing that I will have
> to get the drive shaft modified, does anyone know for sure? I would like to
> convert back to 3 on the tree with the od, but I dont have any of the
> linkage or shift components and there appear to be a lot of them and they
> arent cheap.
>
> Thanks,
>
> Bob
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