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post #1 of (permalink) Old 07-31-2002, 06:14 PM Thread Starter
 
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Lock-up

I have been trying to figure out what rpm my converter is locking up. I did a brake stand about an hour ago and from that I got 2500rpm that just doesn't sound right. I was woundering if anyone knows what the stock lock-up is for the E40D on a '90 with 351w? I'd call Ford but they have given me so much wrong info I don't trust their opinion. Or is there another way of finding out that I don't know about?
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post #2 of (permalink) Old 07-31-2002, 06:41 PM
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Re: Lock-up

Online transmission shops probably list that info.
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post #3 of (permalink) Old 07-31-2002, 10:19 PM
 
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Re: Lock-up

I can get the specifics but my tranny guy told me it normally locks up in third but can lock up in second.
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post #4 of (permalink) Old 07-31-2002, 10:23 PM
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Re: Lock-up

IIRC stock stall speed is 1800... but when it locks up I dunno. I thought the ECM controlled that based upon TPS position and other factors...???
post #5 of (permalink) Old 08-01-2002, 03:57 AM
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Re: Lock-up

yeah it's a factor of load, not rpm... it could lock up in 3rd at 2500 or in OD at 1900, who knows.
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post #6 of (permalink) Old 08-01-2002, 08:33 AM
 
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Re: Lock-up

the stall speed is different thatn the lock-up. The lock up is controled byt the tranny's internal controller. when it wants to lock-up it floods the T/C with high pressure and high volume of fluid which locks the fins together.
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post #7 of (permalink) Old 08-01-2002, 01:54 PM
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Re: Lock-up

"the stall speed is different thatn the lock-up"

Right............. that's why I said I believe stock stall speed is 1800 and I'm not certain what governs lock-up?????? But I agree w/Muddy, I think it's a function of load. Mine is extrememly annoying and locks at low rpms when it shouldn't... I can really feel it lock and unlock. There's a product out there which allows you to control or delay lock-up for the E4OD, I'm seriously considering that (not the B&M ka-boom nuke your E4OD unit).
post #8 of (permalink) Old 08-01-2002, 08:01 PM Thread Starter
 
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Re: Lock-up/stall speed

I stopped at a tranny place today (a friend refered) and he showed me what Shilo said 1800 for stall speed and also said what Havack said, Lock-up can be in second or third and if it's working correctly then it should always be in third. Mine does do it in second or third and also a low rpm. He pointed out that oversize tires will affect shifting points(no sh!t), and that would affect it too.
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post #9 of (permalink) Old 08-01-2002, 09:50 PM
 
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Re: Lock-up/stall speed

If you are running the PSOM then you can fix the shift points by adjusting the conversion constant.
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post #10 of (permalink) Old 08-02-2002, 06:01 PM Thread Starter
 
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Re: Lock-up/stall speed

I remeber in a different thread this subject, An I don't believe I have a PSOM. I have looked under the dash everywhere and can't find one. Do all models 87-91 have these?
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