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Old 08-28-2014, 07:32 PM   #19
clinebarger
Senior Member
 
Join Date: May 2009
Location: Fort Worth, TX
Posts: 6,370
Re: LS SWAP 4l60e problems

Quote:
Originally Posted by BR3W CITY View Post
Cline, I know my stuff...and even to me that sounds like latin

Can you clarify a little bit? Not sure how to use the info you put up.
Sorry about that, I know you have been battling this for quite some time.
Boostedc10 did a great job explaining!!

A worn AFL bore does not always set Solenoid Performance codes or TCC performance codes such as p1870.

You may want to install a pressure gauge on the trans & Closely monitor line pressure....While monitoring Current applied to the EPC, This can be done through a Scan tool if it shows the Current in Amps. I use a DVOM hooked directly to the 2 EPC control circuits. Use the chart below as reference.

I had a '04 2500HD with a 4L80E that I thought was slipping the TCC upon initial apply, It turned out it was falling out of 4th into 3rd then back to 4th. The O/D clutches were distressed & the AFL valve bore was worn. Reconditioning the valve body with a Sonnax Sure Cure kit & new clutches Fixed it.
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