I had Weddle(when they were still doing Vanagon trannies and before I
knew about Dayro) put a used 4.57 R/P in my 90 GL and also a .77 4th
gear.  Wish I had spent the extra $250 and gotten a taller 3rd gear
too.  I can wind it up to 60 in 3rd with a pretty much stock 2.1, but
a little taller would really be nice on 2 lane roads to be able to
throw it in 3rd and pass even pokier traffic than myself.  The stock
3rd/.77 4th has an rpm drop off of about 1400 rpm.  Maybe not a
problem with a Subie or ZTec, but with stock it took some getting
used to.  With stock Agilis tires, the tranny runs a true 70 mph at
3400 rpm  That part I really like.

DM&FS

At 08:00 PM 3/12/2009, mark drillock wrote:
>They are the same internally except for the ring & pinion ratio. The DM
>has a 5.43 ratio while the DK has a 4.57 ratio, both having the same
>gears R,1-4. The DK would give much lower engine rpms at the same road
>speed. The external case is also different with the DK having a stronger
>casting.
>
>Mark
>
>AD Felder wrote:
>>I have a type 091 4-speed transmission in my 82 westy
>>diesel.  According to Bentley, this would have the code letters
>>DM.  The aircooled also had a type 091 transmission, but with code
>>DK.  What is the difference between these two transmissions, and
>>especially, the parts within 'em?
>>
>>