Re: identifying gm t-5s

["James J." <m1garand@speakeasy.net>]

James,
   A GM T-5 will bolt to the 4-speed or 3&4 speed 215 bellhousing (but 
not the 3-speed one).  A Ford T-5 will require an adapter plate, but 
since it has a longer input-shaft, it will work.  There should be a tag 
on the housing, identifying the actual serial number.  There are a few 
places on the web that will allow you to track the year and ratio from 
that tag.  I have a Ford T-5 that I'm rebuilding and the tag was missing 
to begin with, but if you take the cover off the box, there will be 
numbers stamped onto the shafts of the cluster gears.  A good 
tranny-shop should be able to tell you what unit you have based on the 
stamps.  The big challange is just to avoid the 6-cyl. models which have 
lower torque ratings.
   Good luck!
James J.

James Nazarian wrote:

> Gents,
> I find myself in the position of needing a new transmission.  I replaced the
> rear oil seal on my T-10 last night and discovered that the whole debacle
> with drivetrain industries left me with a bent output shaft.  Since I need a
> tranny I'm looking into T-5s.  Before I decide on this route versus sourcing
> another T-10 I need some answers, hopefully you guys can help.
>
> How do I identify a .63 fifth from a .75?  Will there be a number on the
> tranny or is it in the body number of the donor car?  Either way, what am I
> looking for?
>
> What cars did they come out of?
>
> What spline count do they have on the input shaft?  Ten is preferable
> because I can reuse my clutch.
>
> What is the diameter of the input shaft?  This is significant for clutch
> disk, but also so that I know if I can reuse my HTOB.
>
> If I already have the factory 4sp bellhousing will the T-5 bolt right up?
>
> If so, is the length of the input shaft the same or will I need to make a
> spacer?
>
> Does the pilot bushing need to be special or can I reuse the stock one?
>
> Roughly, how long is the driveshaft when using a T-5?
>
> I'm not worried about the speedo gears because I have an electronic
> speedometer, but I'd like to know what thread the speedo takeoff is on the
> T-5.
>
> I'm aware that I will need to modify the crossmember again, and will likely
> have to modify the shifter as well, so I don't anticipate any surprises
> there.  Same for tunnel mods, there may be some but I'm not worried, I know
> how to use a hammer :)
>
> Obviously, I don't expect there are many people out there that have made the
> T-10 to T-5 conversion, so I'm not as interested in conversion procedures
> but in what was encountered when installing the T-5 to begin with.
>
> If I missed anything that had to be modified or any special parts that had
> to be sourced, please speak up.
>
> Thanks a lot everybody,
>
> James Nazarian
> 71 MGB Tourer
> 71 MGBGT V8
> 85 Dodge Ram
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