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Old 09-02-2020, 04:34 PM
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Delay between 1st and 2nd after transmission rebuild..

Hey ppl,

I rebuilt my ZF5HP24 this year in spring and finally got a chance to test it (I was rebuilding other parts of engine afterwards). Before the rebuild there was a big delay engaging 1st gear and that is fixed for sure. I thought it was all fixed until I got a chance to drive a little. Now, I have delay between 1st and 2nd gears. If I am driving fully automatic, car does not seem to engage 2nd (after 1st) properly but if I put on 1st directly and switch to 2nd, it switches and I can drive without problems.

I had rebuilt the valvebody before the transmission but the solenoids were never changed (tested ok).

What would be the problem? I know gears 1 - 4 are under Clutch A so that cannot be. I see 'E' brake engages at 2nd though. I am really hoping not to open up the transmission once again..


I have switched transmission computers and cleared adaptations as well..


Any ideas?.

Thanks,

Ozzie
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Old 09-02-2020, 10:15 PM
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I have the gm transmission in both my x, however wife's copy will act like you described when cold. Seems like it will never so shift on its own from 1 -2 unless I lift the throttle a bit then it will shift. Once warmed up it shifts fine
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Old 09-03-2020, 10:11 AM
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Quote:
Originally Posted by andrewwynn View Post
I have the gm transmission in both my x, however wife's copy will act like you described when cold. Seems like it will never so shift on its own from 1 -2 unless I lift the throttle a bit then it will shift. Once warmed up it shifts fine
Does this occurs even in the summer time? Normally a delay shift is programmed into the trans so that in the winter time it aides in warming up the fluid in the trans. Could be a bad tmp sensor in the trans that is not reporting the correct temp to the EGS (Not TCU) or DME (Not ECU).
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Old 09-03-2020, 01:46 PM
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Itís ambient temperature related. Ill pull the temperature up on my scanner on my car versus wifeís and see how it compares.
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Old 09-09-2020, 10:22 PM
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So, I opened the valve body once again to check E-brake related issues (1-2 or 2-1 gear switch delays) after the transmission rebuild and found this in the pan. What would that be? Would that be the E-brake clutch feed pipe gasket which may explain the 1-2 gear switch issues?


Thanks,


Ozzie
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Old 09-09-2020, 10:44 PM
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If it fell down when you removed the valve body from the trans, it is probably a sealing sleeve. You can see it at 2:10 into this video.

https://www.youtube.com/watch?v=rJw7RWGl0Qw
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2006 Infiniti G35
2001 BMW 3.0I E53 X5 Build date 08/2000 SOLD
Lotus Europa 1970 Destroyed by fire
Lotus Europa 1970 S2 Renault Powered
Lotus Type 52 1970 Twincam Webers Powered
PORSCHE 911 Targa 1982 The Garage Queen
Audi Avant donated to Kars for Kids
BMW 525IT Sold
Audi 4000CS Quattro Sold
Jensen Healey Lotus Powered Sold
Opel 1900 Sold
Triumph Spitfire 1971 Sold
Triumph Spitfire 1968 Sold
Plymouth "Cuda" 340 Six pack SOLD
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Old 09-09-2020, 10:50 PM
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Quote:
Originally Posted by upallnight View Post
If it fell down when you removed the valve body from the trans, it is probably a sealing sleeve. You can see it at 2:10 into this video.

https://www.youtube.com/watch?v=rJw7RWGl0Qw

Thank you but those two rubber seals are smaller than this and they are kept in there with snap rings as you can see in this photo..


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