(02-03-2020, 12:16 AM)fixkick Wrote: I am still STUCK at tires SIZE why leave off such a very important fact.
endless tires made, endless rims, I can not at all guess what tires and rims are on this car ever.
and would be nice to know, for sure, at post 1 for sure.
virtual signature 1:
1998 sport, 4wd, 4AT, 4door, 2.3L new engine + UNKNOWN TIRES AND RIMS. (1.8L ECU and 1.8L TCM stock sill there)
You are correct.
[quote pid='12563' dateline='1580652999']
1998 sport, 4wd, 4AT, 4door, 2.3L new engine + P245/75R16 Tires (1.8L ECU and 1.8L TCM stock sill there)
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I went from the Stock tires to P245/75R16 which is about 13% larger.
I used the term 'reduction box' incorrectly. This is what I used.
https://www.ihpartsamerica.com/store/SPE...ARBOX.html Not from the same manufacturer but this is a picture of what I am using (removed now) .
With the box in place, speedo reading 70. GPS says Im going 70. (and of course P1875 codes. It is not immediate but eventually will throw the codes)
Probably should address this at the speedo sensor than the transmission sensor as it's probably going to be easier to solve
If I can grab the VSS signal from the speedo with the arduino, change it and sent it to the ECU at the difference I MIGHT be able to solve this.
I guess I am also 'mixed up' in the direction I need to go with this. 13% high or 13% low to get it back so the 4AT trans VSS happy as to me.
I have a 1998 FSM and can copy and upload the relevant pages.
I have not played with an arduino but from my reading I think one could be used to make the changes needed.