Lil IHRA classification help please!! Newbie Alert!

[Dan Fahey]

Originally Posted by Frank B.

93 's came with a 4l60 not 4l60e. 94's and 95's came with 4l60e with OBD1 computer. 96 to 98 came with OBD2 computers. Cars with the OBD1 computer have shifting problems with a high stall convertor.

That is correct for the 1-2 shift. However there is a 1-2 Fix for the OBD1 PCM's.
You could run up to a 3000 stall converter without it.
More than that the sensor on the rear of the trans shifted preventing the 1-2 shift under load.

Ed Wright or Bryan Herter (PCMforless)can send you a BIN file for the 1-2 Fix.
TunerCat and LT1 edit are two software available for loading and tuning files.

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