More than likely, and this is something that I have has problems with..is
the wiring. I ended up buying some velcro and sticking it to the roof of the
"space" that the speedo unit slides into. Take your time with this one. It
may be to your advantage to take off the steering wheel. It frustrates me
to watch my old mechanic Gunther pop it back in in 5 seconds, and say "what
do you mean you were having problems getting it in?"