Shift points high after JDM engine/tranny swap
09-30-2004, 01:33 PM
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Shift points high after JDM engine/tranny swap
I just had my 88 Legend engine & tranny swapped with a JDM engine-tranny combined unit by a local mechanic. Afterward, I noticed that the 1-2 shift point is at around 5500 rpm (way high) - the shift points are somewhat off too. The ATF was not Honda, but Mercon III.
In your opinion, is this a problem with the "new" tranny, ATF issue or a matter of some computer adjustment? Also, what is the danger of driving in this condition until it is corrected?
In your opinion, is this a problem with the "new" tranny, ATF issue or a matter of some computer adjustment? Also, what is the danger of driving in this condition until it is corrected?
10-01-2004, 07:23 AM
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Originally Posted by SOLDIER [X]
probably changed the gear ratios so try to shift sooner if u don't wish to rev way too high. That can be caused by the new tranny.
10-01-2004, 03:25 PM
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no i meant that the new transmission may have different gear ratio's thus causing the shift points to change based on speed. Like for an LS transmission at 80 mph u might be at 3500k rpm but with a GS-R transmission you may be at 75mph on the same engine.
10-02-2004, 07:09 PM
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Originally Posted by stoporder
I just had my 88 Legend engine & tranny swapped with a JDM engine-tranny combined unit by a local mechanic. Afterward, I noticed that the 1-2 shift point is at around 5500 rpm (way high) - the shift points are somewhat off too. The ATF was not Honda, but Mercon III.
In your opinion, is this a problem with the "new" tranny, ATF issue or a matter of some computer adjustment? Also, what is the danger of driving in this condition until it is corrected?
In your opinion, is this a problem with the "new" tranny, ATF issue or a matter of some computer adjustment? Also, what is the danger of driving in this condition until it is corrected?
5500?
Is that under WOT?
That would sound low to me.
10-02-2004, 07:29 PM
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Originally Posted by SOLDIER [X]
probably changed the gear ratios so try to shift sooner if u don't wish to rev way too high. That can be caused by the new tranny.
More info: took it to a mechanic who adjusted the throttle cable leading to the trans, to no avail. Then took it to a trans shop, which checked this cable, plus the solenoids and could find no external problems. So... I'm getting the trans replaced on Monday under warranty. Too bad it wasn't a simple fix....
