Ok here is is.........Now remember the letter thing is only used by TA to tell the changes in the model and is NOT the "REAL" model name.
870 Series:
First of the design; incorporating frameless passenger windows (except in sliding window situations), drivers window utilzed a "RTS" style openings, grilless front, rear side engine grill is a basic horizontal grill pattern, 78 degree back slope. Interior characteristics are the "Luminator" interior lights, soild type rubber standee grips and interior rear wall is sloped matching the exterior.
METRO A Series:
Still incorporating frameless passenger windows (except in sliding window situations) & drivers window utilzed a "RTS" style openings. Four part grill introduced on the front, rear side engine grill is changed to a Cris-Crossed pattern. 78 degree back slope remains. Interior characteristics are the "Luminator" interior lights are lost for what we now know as the Transmatic Light System, soild type rubber standee grips are lost for stainless steel standee grips. Interior rear wall is sloped matching the exterior.
METRO B Series:
Still incorporating frameless passenger windows (except in sliding window situations). Drivers window is changed to a "T" style with a larger opening for the driver. 78 degree back slope remains. Interior characteristics are basically the same as the "A", EXCEPT that towards the design change the "C", the rear wall became a straight 90 degree wall.
METRO C Series:
Still incorporating frameless passenger windows (except in sliding window situations) & "B" Style Drivers. 78 degree back slope remains. Interior characteristics are basically the same as the Later version "B" with the straight 90 degree wall. Introduction of the use of Roof Mount HVAC Units comes with this model
METRO D Series:
Introduction of "RTS" type framed windows. Driver's window retains the "T" style however the top portion which was a window is now lost and the Circuit Breaker panel is put in its place, from the exterior however it looks like nothing has changed. 78 degree back slope is lost for a slight reverse 95 degree angle, however later in the design it became a even 90 Degrees. Interior characteristics are basically the same as the "C". HVAC units are on the rooves of this series.
METRO E Series:
Passenger and Driver's Window is that of the "D". 90 Degree exterior back. Interior characteristics are basically the same as the "D", However with the loss of the choice of Roof Mount HVACs, the rear wall gained a new HVAC vent style, taking up a good portion of the rear wall.
That's a quick summary......
Regards,
Trevor Logan