Originally Posted by L.J.:
I think you could say that Lee has definitely opened up a few vehicles and poked around..
Larry
First, I am very happy to see others experiment and modify 'Streets. Its fun, and a great platform for creativity.
I have taken apart every type of 'Streets vehicle I can get my hands on. They are all basically the same chassis design. Two important differences are the type of center pickups - very early K-line vehicles, the ones with metal chassis, had elxcellent vertical-movement center pickups (tiny spring-loaded pickups that telescoped up and down, in place) and TMCC versions my Lionel and WBB now have something about like the standard lever-action spring loaded center pickups on quality locos. All others had that cheap and fragile spring-steel arm and tiny roller pickup, which is problematic.
The other important difference is the wheels: there are types:
"trainlike" - identical to those on clown cars, on early K-line and some WBB now - the worst type of "streets wheels from a realistic appearance standpoint. They look like train wheels. Apparently, WBB is using these on the new sedans due out next month, just painting the center hub. Ugh.
"tiny wheels" - those on the "vintage truck" (looked sort of Model A like) - these are the only 'Streets wheels that are the proper diameter for scale cars. they have a bit of tire edge molded into them and wire-wheel like hubs. I've bought up all I can for future diecast car conversions (about eight).
"van wheels" - used on many of the Ford panel vans and some of the UPS-type delivery vans. These have a very square profile like train wheels but a chrome plastic car-like hub that makes them acceptable.
"rubber wheels" as on the bus (see below).
The "bus" is quite interesting, because: a) it's scale except for length, b) its the only 'Streets vehicle that depends on rubber tires for traction (they seem to be designed to not make contact with the road surface, but instead so the inside edge of the tires grabs the outer edges of the rail like a traction tire does) , c) due to those tires it has a wider track than other 'Streets vehicles by about 7/16 inch, d) its track and tires are of a size that really fits scale "big trucks" and construction vehicles best.
I have bashed a number of 'Streets vehicles (UPS van into an armored personnel carrier, the bus into a military scout vehicle, etc.), and early on many times used the stock chassis with the stock motor and a shorted chassis for conversion of diecast 1:43 cars. But anymore, I use only the axles, making the chassis myself and using larger, flywheel motors where they will fit, and better center pickups and adding a gearbox where it will fit. A lot of work but particularly the flywheel makes for a better runner.