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Guest Message by DevFuse
 

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delayed lock up


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7 replies to this topic

#1 nipper

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Posted 11 September 2006 - 06:08 PM

This is annoying not an issue. same road same conditions. Sometimes the car stays in third with a delayed upshift to fourth. When in fourth with cruise may delay lockup.
Fluid is new, and does it when hot. Any ideas?

#2 Manarius

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Posted 12 September 2006 - 12:41 AM

I find that using cruise, my car jumps a lot from lockup to not locking up. I think the cruise unit's interaction with the TCU causes this - I don't think it's mechanical.

#3 OB99W

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Posted 12 September 2006 - 08:07 AM

This is annoying not an issue. same road same conditions. Sometimes the car stays in third with a delayed upshift to fourth. When in fourth with cruise may delay lockup.
Fluid is new, and does it when hot. Any ideas?

Is the road level or inclined? If inclined: up, down, how steep?

#4 Andyjo

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Posted 12 September 2006 - 08:30 AM

have you tried the extra grounding mod? i found my 4eat shifts alot better with it... i just ran some heavy gauge wire from the neg. battery terminal, to some bolt on the block.. not sure exactly what it was :rolleyes:

#5 grossgary

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Posted 12 September 2006 - 08:35 AM

try disconnecting the shift resistor and see what happens?

i leave mine disconnected anyway, shifts are firmer and the POWER light blinks but i like the way it shifts much better that way.

#6 nipper

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Posted 12 September 2006 - 08:47 AM

Is the road level or inclined? If inclined: up, down, how steep?



doesnt matter, it can be flat or down hill. Uphill i understand.

nipper

#7 OB99W

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Posted 12 September 2006 - 01:31 PM

doesnt matter, it can be flat or down hill. Uphill i understand.

I don't know offhand why a '97 (phase 1) 4EAT and matching TCU would behave the way you're describing. The phase 2 units (like my '99) have a shift map that includes downshifting to 3rd if you just tap the brakes while going downhill (to obtain engine braking). Even that wouldn't explain the behavior on a level road.

#8 Manarius

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Posted 12 September 2006 - 03:29 PM

Phase I (well, 90-94 at least) shift down into 3rd to attain engine braking. It's quite a difference slowing to a stop in Neutral than in Drive.




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