[elky] Re: Monte - Lockup
- From: Robert Adams <elcam84@xxxxxxxxx>
- To: elky@xxxxxxxxxxxxx
- Date: Sun, 5 Dec 2010 09:27:54 -0600
On Sat, Dec 4, 2010 at 11:47 PM, Ray Buck <rbuck@xxxxxxxxxxxx> wrote:
>
>
> On 12/4/2010 9:40 PM, Robert Adams wrote:
>
> The trannys all lock up in 3rd and 4th. They don't lock up
> in 2nd because the road speed the ecm locks up the converter at is always
> higher than what is normal in 2nd unless you are at full throttle bu then
> the ECM unlocks the converter anyway due to TPS voltage.
>
> Even the burb locks up in 3rd you just don't usually feel it.
> Also some trucks have a 3rd and 4th switch so the ECM can release the TCC
> between shifts but in the case of your burb the ECM controls all shifts and
> doesn't need those switches anymore.
>
>
> *I'll have to try holding it in gear to see if I can feel the lock. It's
> generally 42mph, isn't it?*
>
Most chips are set around 28-35mph. On a properly working
system it's much nicer to drive with it locked up at low speeds. If the
combo is off or the tuning is off then it won't be any fun.
>
>
> The only thing the ECM does with the 4th gear switch
> in regards to TCC is to force lockup in 4th at all times TPS is below a
> preset threshold. Any other time the ecm is only looking at TPS and road
> speed for when to lock up. Which always happen in 3rd and 4th.
>
> The 2004r will not lockup in 1st because the TCC pressure feed
> is off the 2nd gear apply. And it's 2nd that feeds it so it can be locked up
> in 3rd and not have a lag in pressure if it were fed off the 3rd(direct)
> clutches.
>
>
> *Thanks for the explanation. I never knew how it locked (well, not quite)
> 1st gear outta the process. Now I understand.*
>
Well there is more to it but..
>
>
>
> I'd hook up a manual switch and if it works
> right then the B&M box is bad. Wouldn't surprise me as their stuff isn't
> known to be the best. Course that goes for allot of other aftermarket auto
> electronics.I'm not a fan of their shift kits either cause they cut too many
> corners and make them bang.
>
>
> *I don't suspect the box, but it'd make things a lot easier to determine
> what's working and what isn't if a simple switch was rigged up.
>
> r
> *
>
>
>
I wonder if it's a wiring issue.
Robert Adams
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