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BTR Auto EF slips in 1st sometimes help me!! 

 

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 Post subject: BTR Auto EF slips in 1st sometimes help me!!
Posted: Fri Aug 22, 2008 3:38 pm 
Stock as a Rock
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Age: 37

Posts: 133

Joined: 6th Nov 2005

Ride: XHII ute

Location: Brisbane
QLD, Australia

hey all,

my ef II wagon sometimes slips 1st gear from take off.
it does it very rarely, usually when rolling through a give way sign or through a slow roundabout. it feels like it gets caught between the 2-1 downshift then you put the foot down and it slips a tad then it grabs & off you go.
doesnt do it all the time, it can go a week (200 or 300km) without any problems then just out of the blue it will do it from a set of traffic lights or similar. doesnt seem to matter if its hot or cold, its just completely random.
I pulled the valve body off a while ago & checked the band adjustment. everything was in specs. i did a trans service, new fluid & filter and replace the s5 solenoid with an au one. (recommended to me by an auto trans reco shop).
didnt fix it.
i checked the fluid level car running, auto pan slightly warm, tranny fluid is spot on.
not sure what the problem is.
i've read that the s1 solenoid controls the 1-2 shift thought maybe it was the problem. i checked it with a multimeter and its spot on specs. (23ohms). maybe the s1 is a bit d**k sometimes?

as anyone else had this happen to them?
it seems to be a lot better if i leave the economy switch off.
i have also read that the current to the s5 solenoid is 1000mA while in garage 1st & auto 1st gear but gets full pressure in manual low.
manual low has no issues at all.
i think maybe because my auto is getting a bit tired, it can't cope with the lower liner pressure in 1st.

btw, im a mechanic so i dont mind getting in there and fixing what needs fixing rather than just swapping the auto for the sake of it. what do you learn by doing that?
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Posted: Fri Aug 22, 2008 4:57 pm 
Getting Side Ways
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Age: 66

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Joined: 18th Mar 2006

Ride: EF-XR8chaser

Location: wollongong
NSW, Australia

try the error codes,might give a clue or as you said too many ks,my box killed 1-2 band at 276k,so had it rebuilt,no problems so far-with warranty,more to play with---------problems

 

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Posted: Fri Aug 22, 2008 10:34 pm 
Parts Gopher
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Joined: 13th Mar 2007

Location: Melbourne
VIC, Australia

Have you done a "stall test"?
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Posted: Mon Aug 25, 2008 12:48 pm 
Stock as a Rock
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Age: 37

Posts: 133

Joined: 6th Nov 2005

Ride: XHII ute

Location: Brisbane
QLD, Australia

yes. the torque converter is fine.

i would like to try a full auto flush but 20 litres of fluid isnt cheap.
i dont want to waste money on atf95 if the box is stuffed anyway.
the fluid looks brown, even after 2 services. its probably part of the problem.

i check the error codes, got a system passed.
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Posted: Mon Aug 25, 2008 2:13 pm 
Fordmods Junkie
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Ride: AUXR6 HP With Ducati SupA Bike!

Location: Perth
WA, Australia

if the fluid is brown after 2 services

flush the system!

 

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Posted: Wed Aug 27, 2008 11:06 pm 
Oompa Loompa
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Age: 59

Posts: 39

Joined: 8th Dec 2004

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Ride: ef xr falcon

Location: sydney
NSW, Australia

Hi ,have a similar prob with my EFxr as descibed in previous post several months ago(1st-2nd gear shift) i hav had auto serviced and s5 solonoid replaced with AU one ,made no differance.
no diagnose test came up with any problem with the auto.
A reply to a similar auto prob was its the B-1 bevel spring in the 2-4 serv
As yet i have not tried this solution ,but would be sure happy if someone could confirm this as a solution !!!!!
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