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TCM failure
The early nineties Mitsubishi made TCMs are quality computers with the exception of the failing Rubicon electrolytic capacitors that were used to equip these electronic control units.
Engine computer or transmission computer, these will break down after five years or so, some last a few years longer but they are basicaly on bowored time. TCM or TCU failure usually appears as "fail safe mode"- the car drives in second or third gear only.
Important:
On the '91 - '92 model 3000GT, Stealth and Diamante',
the Transmission Computers are notorious for blowing the main processing chips when they fail. Its very imoprtant to inspect your TCM before sending it in for rebuild service. Call us for info when you open it up, and we'll walk you through it, in an attempt to make sure you do not ship us an unrepairable unit.eare on bowored time. TCM or TCU fail usually appears as "fail safe mode"- the car drives in second or third gear on
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Rebuilt Mitsubishi Diamante' TCMs or TCUs, -transmission computers
Diamante'  MD740087 and MD758086
Replacement TCMs for these part #s are going for $525. - when available
When we get these in stock they don't last long in the inventory, however we usually are able to order one for you if we do not have it when you call.
Before sending in an MD740087 or MD758086 for rebuild and return service,
please check the main processing chips on the circuit board for signs of the examples below.
If you have either of these on your TCM, it will not be repairable.
There is one large chip and two smaller ones on these.
This is the classic bubbled chip,
it is possible to replace the chip, but it is not available for replacement
This is a sneaky one, the brown center burnt chip,
this is easy to miss, sometimes it is very faint, not as obvious as this one,
but it is still a board killer.
Call us toll free at 800 241 6689
Our staff of technicians specialize in the repair and rebuilding of automotive computers, specifically engine computers and transmission computers, known as the ECM, ECU and TCM or TCU.
We rebuild, repair and exchange Japanese electronic control units for Mitsubishi, Suzuki, Honda, Mazda, Geo, Acura, Hyundai, and import Dodge, Plymouth, and Eagle.
Core Refund Warranty & Returns
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