4l80E seperate aftermarket wiring/computer

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ChEvRoLeT - 24 Feb 2008 01:50 GMT

Does anyone know if GM sells a after market wiring harness to manage the
4L80e transmission ?.. I have heard to just find a diesel 6.5 and grab the
wiring and computer,, Sounds like a waste of time though.. I'd rather buy an
after maket system that I can hook up cleanly inn my 85 4x4 Thanx for any
advice.

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drjohnson - 24 Feb 2008 04:50 GMT

> Does anyone know if GM sells a after market wiring harness to manage the
> 4L80e transmission ?.. I have heard to just find a diesel 6.5 and grab the
> wiring and computer,, Sounds like a waste of time though.. I'd rather buy
> an after maket system that I can hook up cleanly inn my 85 4x4 Thanx for
> any advice.

There are others but I have used these with good results.
http://www.hgmelectronics.com/products/compushift.
I'll have to look around but there is another company that makes them, maybe
TCI. The good and bad. You can use a OEM controller and harness but in order
to tune it you will have to look into something like tunercat. Also you need
to look at how to handle your tps and map. The diesel shift points are gonna
suck if you cant change them. I don't know the exact RPM but the diesel
controller is gonna spit out some low RPM shifts. There is actually not
cheap and easy way to do it. If you use OEM you are gonna save maybe 200/300
bucks but you are gonna be dealing with a wiring nightmare. Spend a few more
bucks and you have plug and play. How valuable is your time?

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