Question: EZ TCU from TCI in a 1992 6.5TD K2500 with 4L80E - Diesel Place : Chevrolet and GMC Diesel Truck Forums
 
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4L80/85E Transmissions. 6L90 Transmission Discuss the 4L80/85E transmissions found in the 6.2/6.5L equipped vehicles and Duramax equipped vans. 6L90 discussion.


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Old 03-26-2019, 08:37 AM   #1 (permalink)
KUSCHEL
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EZ TCU from TCI in a 1992 6.5TD K2500 with 4L80E

Hello.

I have got some questions for the use of the EZ TCU in my K2500.

I think when you put a 4L80E in a car where a TH400 was in before, the EZ TCU is more or less a standalone CU just for the transmission.


Because I have 1992 model I am running a mechanical DB2 IP.
So there are no real engine trouble codes, right?

It looks like that the EZ TCU just needs the information of the
- TPS-Sensor
- Output speed sensor
- wheel diameter
- axle ratio

Does the EZ TCU works together with original ECU/TCU of my K2500 or is the original CU in my truck completely switched off?
Does the SES lamp in the cluster still works properly when the EZ TCU is connected?
How does the 4L80E shift in 4x4 low?

Is here somebody who has the EZ TCU in his truck?

Regards
Jan

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1992 K2500 6.5TD Regular Cab with Long Bed

Last edited by OkDually; 03-26-2019 at 08:41 AM. Reason: prefix
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Old 03-26-2019, 12:37 PM   #2 (permalink)
Glagulator
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Join Date: May 2005
Location: Very south TEXAS, Formerly Wisconsin
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The computer in your truck should be just a TCM, only transmission codes.
What is the part # on it?
If it is 16147609 then the EZ TCU completely replaces it.
Your trans should work about the same with either controller.

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There are 10 kinds of people in this world; Those who understand binary and those who don't.

99 CREW LONG SRW C3500 work truck 199k+ mi. orig. motor & trans 4.10, modded engine harness, new oil cooler & lines, all new front end parts and poly bushings, trans poly mount, all new brakes.
96 SUBURBAN K2500 wife's truck 210k+ mi. orig. motor & trans, 3.73...
95 C2500 Suburban 6.5td HO w/p, timing set, HB & pulley, all rubber hoses, modded engine harness, PMD to bumper...
95 C1500 Suburban 6.5td rebuild tranny, convert to DB2, replacing as many parts as I can.
96 C2500 Suburban 7.4L converting to 6.5td w/ DB2, 4L80, 3.73
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Old 03-28-2019, 12:43 PM   #3 (permalink)
KUSCHEL
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Join Date: Oct 2008
Location: GERMANY / Hannover
Posts: 43
iTrader Score: 0 reviews

I have exactly the same part number in my truck.
If I replace the original TCM to an EZ TCU there is no SES lamp in the dashboard anymore, right?


Do you know if I still need the engine rpm sensor singal from the oil pump drive?
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1992 K2500 6.5TD Regular Cab with Long Bed
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Old 03-29-2019, 01:17 AM   #4 (permalink)
Glagulator
Diesel Specialist
 
Join Date: May 2005
Location: Very south TEXAS, Formerly Wisconsin
Posts: 3,496
iTrader Score: 5 reviews

The EZ TCU has it's own trouble light, no more SES.
You will need the ESS signal.
__________________
There are 10 kinds of people in this world; Those who understand binary and those who don't.

99 CREW LONG SRW C3500 work truck 199k+ mi. orig. motor & trans 4.10, modded engine harness, new oil cooler & lines, all new front end parts and poly bushings, trans poly mount, all new brakes.
96 SUBURBAN K2500 wife's truck 210k+ mi. orig. motor & trans, 3.73...
95 C2500 Suburban 6.5td HO w/p, timing set, HB & pulley, all rubber hoses, modded engine harness, PMD to bumper...
95 C1500 Suburban 6.5td rebuild tranny, convert to DB2, replacing as many parts as I can.
96 C2500 Suburban 7.4L converting to 6.5td w/ DB2, 4L80, 3.73
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