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Old 09-27-2007, 07:05 PM
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1999 suburban 4l60e problems

Hello,
I dont post very often but Iv just about ran out of options.
To make this a short story the torque converter locks up 95% of the time and I get the classic 1870p code. Had a new tranny built and installed and still have the same problem so now Im replacing the ECU but Im not sure if the tranny and motor ecu are the same. If they are I replaced the ECU but the security light shuts the motor down when I start it.
There might be a chance that my remote start system could be a problem but Im thinking not.
If anyone has a idea please dont be shy.
Bob

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Old 09-27-2007, 08:04 PM
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Quote:
Originally Posted by saltybob
Hello,
I dont post very often but Iv just about ran out of options.
To make this a short story the torque converter locks up 95% of the time and I get the classic 1870p code. Had a new tranny built and installed and still have the same problem so now Im replacing the ECU but Im not sure if the tranny and motor ecu are the same. If they are I replaced the ECU but the security light shuts the motor down when I start it.
There might be a chance that my remote start system could be a problem but Im thinking not.
If anyone has a idea please dont be shy.
Bob

as I read this;

you had a 1870 slip code...Was the trans and converter replaced ( different units ) or same units rebuilt?? You still have the same trans problem?

You also have a security system failure now too?

Any pinched wires during the trans install?







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Old 09-27-2007, 10:09 PM
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Sorry for the confusion,
Use it or lose it comes to mind.
The new trans and converter are form a 98 that I had rebuilt.
The security light issue happens when I trade out my ECU(starts then dies)with the one form the 98. I'm not sure if the is related to trading the ECU or maybe a reset issue with the alarm system.
As for the pinched wire, symptoms are the same before and after the trans swap.
Bob
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Old 09-27-2007, 10:22 PM
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Quote:
Originally Posted by saltybob
Sorry for the confusion,
Use it or lose it comes to mind.
The new trans and converter are form a 98 that I had rebuilt.
The security light issue happens when I trade out my ECU(starts then dies)with the one form the 98. I'm not sure if the is related to trading the ECU or maybe a reset issue with the alarm system.
As for the pinched wire, symptoms are the same before and after the trans swap.
Bob
Often the 1870 code is set from converter lock up clutch slippage.

1999 with a LS1 motor would be a different design converter , different depth bell housing , input shaft is different from a 1998 trans behind a a 5.7 liter motor. The trans were matched up correctly I would think if it bolted together.? Both were of the 3 piece design case? Bell housing unbolts?

Was the v-body on this rebuilt trans checked for wear in the PWM lock up valve bores? This is a common failure in the v-body. There some repair kits for this TransGo has a plug and play kit that I have used many times.

Sonnax has a different design repair kit and requires tooling to bore/reem out the valve bore for the repair.

The AFL valve needs a looking at too

Both brands of kits work well

Has the vehicle been scanned to determine if the converter clutch is slipping excessively?


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Old 09-27-2007, 10:36 PM
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The valve body was totally updated and the same code is coming up but the converter lock up is less evident with the new trans. Basically when going from park to drive or reverse my RPM drops to 450 and jerks at shifts.
Iv had it to 3 trans shops and 1 electronic shop. When the trany is controlled by a handed held unit the trany works fine but I dont have much faith in the shops that I went to.
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Old 09-28-2007, 06:31 PM
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After replacing the trans and converter 3 local visits to trans shops and one electrical shop I changed out the ecu and had a local Chevy dealer reprogram it for my vin. All is well
TY
Bob
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Old 09-28-2007, 09:53 PM
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Long way to go to fix a trans problem.....
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