Quote Originally Posted by 1project2many View Post
BFYZ is about what many calibrations are about in the GM database. The transmission type is undocumented. It's hard to say why this happened. Possibly the inclusion of automatic trans information s an option seemed superfluous in a car line that only offered automatic transmissions. It is clearly not a manual transmission. It clearly is a "no listing / all" calibration.



Replacement GM Cam for Fleetwood and Caprice shows part no 10088155. Same cam as 305 TPI engines.
Cam specs here:
http://www.gmtips.com/3rd-degree/dox/tips/cams/cams.htm

The 9C1 cars got a larger cam but I'd look at the exhaust for the small difference in Caddy and Caprice.
93 Caddy TBI had a weird 1 year only ECM with a Memcal and the one I have had my hands on had the ASR system from the Vettes and electric fans. The absence of the clutch fan may explain the rated power difference.

The TH375 aka 3L80 vanished in trucks in 1990. I doubt they used them in Cadillacs. Perhaps the coach chassis had the 4L80E in them starting in 91 but I doubt that too. I know the LT1 Limos used the same 4L60E that was in the 9C1 Caprice with the large added coolers. Making me believe in all likelyhood the earlier cars used a 700r4 too.