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[psl]

I have a problem with the autobox on my miggy and I thought I’d dip into the great pool of knowledge that is OOF.
I’ve not her long so don’t know how long this has been happening for but.
after a while I lose momentum I get High revs like its in neutral and the suddenly the box remembers what its doing and puts it back in gear with a thump, check automatic gearbox then comes up and its limp home time, however if I back off as it starts to rev high and change down a gear manually I can stop it coming up with a fault.

I haven’t yet checked the ATF level because I haven’t got a replacement washer for the level plug yet and its cold out.

I suspect it might be the selector switch, but am open to hear you views.

Pat

P.s Great Forum.

[Marks DTM Calib]

Sounds like classic thrust washer failure to me......bet if you drop the front sump off the box you will find the remnants of a washer.

[TheBoy]

If the LEDs by stick light up appropriately, then not selector switch.

First port of call would always be change ATF, but as suggested above, I suspect bits of thrust washer will be there.

Easy enough to replace thrust washer once box is off.

[HerefordElite]

 
got to agree with Mark on this - similar thing happened to my box while on the way to the south of france a couple of years ago, wouldn't change down lots of clunks etc.
took the sump off to change the filter and found (what i now know to be) what was left of the thrust washer
ended getting a second hand box fitted for £500

guess from what the guys are saying you can sort the thrust washer prob???

good luck

[psl]

Sounds like classic thrust washer failure to me......bet if you drop the front sump off the box you will find the remnants of a washer.

  so what our my best options from here? reapir the box myself, get a garage to do it, or swap it out for another one.

And whats my time scale is it likely to wall apart at any moment or can I keep driving on it until it gets fixed?

thanks for the replys so far.

[TheBoy]

Sounds like classic thrust washer failure to me......bet if you drop the front sump off the box you will find the remnants of a washer.

  so what our my best options from here? reapir the box myself, get a garage to do it, or swap it out for another one.

And whats my time scale is it likely to wall apart at any moment or can I keep driving on it until it gets fixed?

thanks for the replys so far.

I wouldn't drive until fixed, unless you are going to change box anyway.

To change thrust washer, from memory, its:
Box off car
Remove TC and bellhousing (with oil pump)
Fit thrust washer
Refit

With the right equipment, probably around 3hrs?