Got the code DTC P1870 Transmission Component Slipping.....need advice

[Shane]

I put a Yank 3500 stall conveter in liek 2 years ago and i noticed liek 4 months after in high gear when i gave little gas it would grind a little bit but only in high gear. I just got a light today and i used Auto Tap and got the code DTC P1870 Transmission Component Slipping what are the possibilties it would be and what should i do? Thanks

[SkAchilles]

I would do a search and type in P1870, a LOT will come up. There are several things it could be. Best case senario, it is just the pulse valve and Transgo sells a $50 kit to fix it. Worst case, it is the valve body. That is about $400+ any labor, or if you can find a place to do it you can just get it bored and resleaved much cheaper. When I got that code, mine was the valve body. I have heard it can also be things like the TCC regulator valve, and pressure control solenoid. It's been brought up several times so I would just search around. As far as I know, if it is doing it in the lower gears, it is the pulse valve, higher gears it is the valve body.

Hope some of that helps.

[Only4U]

it's your converter, lock up is screwing up. it could also be the tranny pump, or a solenoid of some sort. take it in and get it looked at.

[Kris Burns]

We get at least two or three 4L60E's a month with a p1870 code. there is a pulse valve upgrade we do to correct the problem. transgo sells an upgrade kit take it to any tranny shop and there know exactly what to look for. it's very common

[Shane]

how much should i expect to pay to have it fixed if i bring them the part?

[SLOWBRAEATER]

first the tranny guy put a spring from a 700 pump in and then i put a high stall converter in and the problem went away, only cost 80.00 for the spring to be put in and since your tc is new i bet its the spring like the guy above is talkin about

[Magnus]

Kris, welcome to the board and EXCELLENT post. [img]smile.gif[/img] Very good info.

[Kris Burns]

Thanks magnus, we install a transgo shift kit minus the servo which is a pain to get to on the car. most of the 4L60E's we get in with the p1870 are pickups but I've done at lest 9 or 10 f-bodies. We also replace the pulse width modulator solenoid and do a service. the price we charge is around $325.00. The price will vary in other places. we charge $63.00 an hour for labor here in phoenix

[SLOWBRAEATER]

:eek: 63.00 an hour? yikes ill stay in pa where its only 32.00 hour

[Guardsman]

Superior Transmission also sells a kit that gets rid of the pulse width modulated TCC apply, and converts it to an straight on-off apply.
I have been having problems with my TCC not locking up, and it finally popped the code in December.
Also, the tranny in my car was replaced under warranty just before I bought it, and it's already having problems again (about 55,000 miles later).
There are also various other kits available to fix the various other quirks and problems on the 4L60E. I was looking at $425 to install them, and would have had to pull the tranny to do it. The transmission guy I was talking to said he can do a rebuild, including installing the fix kits, for $1100. It's not really that much more than just installing the fix kits, and it's extra insurance.
My advice is to definitely get your tranny fixed at a non-GM shop, because they will only install parts that will end up with the same problem another 30,000, 40,000, or 50,000 miles down the road.
I have dealt with Chevy's customer service on a couple of issues, including the tranny, which has a service bulletin, so Chevy knows about it, but Chevy will either give you another tranny with the same problems if you're under warranty, or blow you off if you're no longer under warranty.