Chip to control shift firmness on Gen1 ?

12-05-2001, 07:48 AM

I am wondering if you can set up a chip to control the shift firmness (line pressure) of the E4OD ?!

I don't know if my converter is going out or what, but my truck has started to shft EXTERMELY HARD!! Even when you put it in gear, it makes a big thump?!

The weird thing is,.....it comes and goes! Sometimes it will shift like this for several days at a time, then it'll quit and shift fine for a week or so. Then it starts shifting hard AGAIN!!

Any ideas or suggestions?!

Thanks

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93L #3978
95 SHO ATX
01 VF750 Magna

12-06-2001, 10:31 PM

I can control trans pressure for sure, but it sounds to me like you have other problems. Usually hard shifting like you are mentioning is caused by the PCM going into a default, which causes super hard shifts. The most common cause is related to loosing the speed sensor signal, so the PCM has no idea of vehicle speed.

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SAL- Power Surge Performance
www.powersurgeperformance.net
01 Lightning
99 Lightning
95 Lighnting
91 SHO Plus (can't drive Lightnings every day)

12-05-2001, 07:48 AM	#1 (permalink)
93whitelightning Guest Posts: n/a View this user's gallery iTrader: / %	Chip to control shift firmness on Gen1 ? I am wondering if you can set up a chip to control the shift firmness (line pressure) of the E4OD ?! I don't know if my converter is going out or what, but my truck has started to shft EXTERMELY HARD!! Even when you put it in gear, it makes a big thump?! The weird thing is,.....it comes and goes! Sometimes it will shift like this for several days at a time, then it'll quit and shift fine for a week or so. Then it starts shifting hard AGAIN!! Any ideas or suggestions?! Thanks ------------------ 93L #3978 95 SHO ATX 01 VF750 Magna

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12-06-2001, 10:31 PM	#2 (permalink)
Lightningtuner Guest Posts: n/a View this user's gallery iTrader: / %	I can control trans pressure for sure, but it sounds to me like you have other problems. Usually hard shifting like you are mentioning is caused by the PCM going into a default, which causes super hard shifts. The most common cause is related to loosing the speed sensor signal, so the PCM has no idea of vehicle speed. ------------------ SAL- Power Surge Performance www.powersurgeperformance.net 01 Lightning 99 Lightning 95 Lighnting 91 SHO Plus (can't drive Lightnings every day)