FMX Auto box problems

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Billy_the_Kid
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Location: Pretoria

FMX Auto box problems

Post by Billy_the_Kid » Mon 19 Dec 2011, 11:50

Hi all,

This weekend I attempted to rebuilt the FMX for the second time. and ended up removing it 4 times. Last night I started her and took her out for a drive and everything was fine and decided to use the car today to go to work, however halfway there she started slipping again, once she shifts to 3rd she puls fine, also reverse is slipping as well. I did stop to check the fluid levels and they for spot on.

Can it be that my settings on the front and rear band is incorrect? Also are there anything else that I need to lookout for.

Are there anyone in or close to pretoria that might be able to come and have a look at the settings, I will remove the sump before hand.

Otherwise any input would be appreciated.

Thanks
William
My current rides
Ford Cortina Ldv 3.0L V6
Ford Transit 2.5L V6
Kawasaki GPZ 550 Customized
Kawasaki GPZ1100

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RASSIE
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Re: FMX Auto box problems

Post by RASSIE » Tue 20 Dec 2011, 07:01

Hi William that is bad news!!
I think you need to bring the F100 to me to look after and then you go back to a V6 Cortina with a manual box. :lol:
Not many can do a FMX box as most have passed away who new them.
Rassie.
http://www.rassiesauto.co.za/
“Cowboys do not ride donkeys”
“I will die driving a V8”

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Billy_the_Kid
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Joined: Tue 10 Aug 2010, 10:15
Location: Pretoria

Re: FMX Auto box problems

Post by Billy_the_Kid » Tue 20 Dec 2011, 08:50

Rassie,

Don't joke, I am seriously thinking of giving the F100 the good old petrol and match treatment. :twisted: :cry:

William
My current rides
Ford Cortina Ldv 3.0L V6
Ford Transit 2.5L V6
Kawasaki GPZ 550 Customized
Kawasaki GPZ1100

Neek.
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Re: FMX Auto box problems

Post by Neek. » Tue 20 Dec 2011, 18:40

William, WTF, you can't say that !! :lol: :lol: :lol: :lol: :lol: :lol:

Actually, ignore Rassie, I'll take the F100 from you ! :lol: :lol:

I'm surprised that you took the box out 4 times !! That's not a 2 minute job.

Just out of curiosity, what's the total amount of oil in the box at the moment, inclusive of TC ?

When you say ''rebuild'', is that renewal of the clutches and bands and seals and filter ?

What adjustments did you make to the bands ? Same as the mail I sent you, or different ?

Did you follow the link, or must I send you the 57mb file ?

Please give more detail about the shift patterns.
Is it a slip from 1-2 and 2-3 ?
Can you change gear 'manually' ?
When you engage 'D' gear, does it engage immediately, or is there a delay ?
Did you adjust the vacuum modulator at all ?

We'll get your box fixed, but just need a bit more detail first. :D

And R5 says you didn't use a Type F equivalent oil !?

Laterz.
:D
''Bullet the Blue Sky''

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Johann65
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Re: FMX Auto box problems

Post by Johann65 » Tue 20 Dec 2011, 20:07

There is a specialist who is in Germiston area who is reputed to be very good. You will have to visit him. Anybody know who he is???
Member No: 209
Ah! Yes I remember it well! (Only GM's!)
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Billy_the_Kid
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Location: Pretoria

Re: FMX Auto box problems

Post by Billy_the_Kid » Wed 21 Dec 2011, 13:43

Nick,
Well my best time for taking the box out is currently 43 minutes and to put it back, it took me 1 hour and 20 minutes that’s including the filling with oil.

My current total amount of oil is just over 9 ½ liters TC and oil cooler included.
Yes I did the new clutches, bands, seals and filter. Used the old oil pump and I am thinking that it might be my oil pump that giving me hassles now.

I adjusted the the bands as per the instruction you send me, however when I checked them on Monday night, they were lose again and I reajusted them to the specs. When I drove her on Monday night she felt better baut as soon as she heats up sh started with her shit again.

Basically she does not want to pull away it shounds as if the box is slipping but once she is running it almost feels as if sheruns normally, when she shifts to second , she starts to stutter it almost feels as if the engine is misfiring, if I then put apply full throttle she goes normally and when she shifts to 3rd sh runs normally, no problems. When apply the brake to stop she start to jerk again just before I get to a complete stand still. If I do manual shifts she shifts up and down but the simptoms stay the same.

Sometimes it feels as if she is pulling away in 2nd and as soon as I put foot sh goes alof a sudden like a bat out of hell.
When I engage ‘D’ there seems to be a slight delay and the same with reverse, also when I reverse it feels the same as when I try to pull away going forward.

I did not touch the vacuum modulator at all, it is currently screwed in all the way.

I used a catrol ATF since I cpould not find anything stipulating type F on the bottle at my local Midas.

Oh – I did follow the link and the info were very helpul, thank you.

Cheers
William
My current rides
Ford Cortina Ldv 3.0L V6
Ford Transit 2.5L V6
Kawasaki GPZ 550 Customized
Kawasaki GPZ1100

Neek.
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Re: FMX Auto box problems

Post by Neek. » Wed 21 Dec 2011, 14:12

Hi William,

That's a good comprehensive post. :D
43 minutes !!!!!! 8O
That is seriously impressive !!
If you get a call later and the guy says he's Chip Foose. He is ! :lol:
And you will get a job on 'Overhaulin'. :lol:
Are you working on your own, or do you have help ?
Personally I lost track after 4 hours ! (Ok, I'll be quicker next time, but not 43 minutes).

The oil level should be 10.40 litres (for ales), but 9.50 litres is fine.
Out of curiosity, is your dipstick accurate ?
Mine shows way too full with only 8 litres !??

I have comments and questions, and I'd like to upload some pictures to use for reference, but will only do that later.

My first thought, and easiest adjustment for you, is that the vacuum modulator plays a key role, and being adjusted all the way in sounds wrong.
From the full in position, turn it out one full 360 degree turn, and drive around the block at normal pace, then adjust one more turn again, and test drive.
Do that +/-8 times and let us know your feedback.
You should definitely get a different 'feel' at some point in the test drives.

Is the vacuum connection from the box to the intake manifold leak proof ?

How exactly did you clean the gearbox components ?

Cheerz4now,
Nick
:D
''Bullet the Blue Sky''

Neek.
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Posts: 257
Joined: Thu 24 Nov 2011, 20:15
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Re: FMX Auto box problems

Post by Neek. » Wed 21 Dec 2011, 14:17

Sorry, 1 more quick question.

Are your shifter and kick down linkages/cables setup 100% ?

This isn't too serious from what you've said, but full detail will assist with the 'problem analysis'.
''Bullet the Blue Sky''

Neek.
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Posts: 257
Joined: Thu 24 Nov 2011, 20:15
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Re: FMX Auto box problems

Post by Neek. » Wed 21 Dec 2011, 15:01

The picture below, for the benefit of those wishing to learn, is of an FMX gearbox, which is principally the same as any 1970's Ford, GM, Chev etc 3 speed auto gearbox.

The silver bit on the left is the bell housing which covers the Torque Converter (TC), and the silver bit on the right is the extension housing.
The wee round thing coming out of the back at the bottom of the blue bit is the vacuum modulator.

William, I read in various manuals suggested oil levels ranging from 8.50 litres to 10.40 litres, which was irritating !

The bell housing comes in different specs to fit different engines, but the extension housing comes in different lengths !
One of mine was +/-25cms long while the other one was +/-40cm's long, and this has to influence the oil level required.
I never did get clarity on that one! :cry:

I have the +/-25cms fitted currently with 9.50 litres in it. Works beautifully, with no aeration, although I will add another 0.50 litres when the engine's eventually back in.

A late initial shift into reverse or drive indicates a low oil level.

Add another 1/2 litre to the box before you do any vacuum adjustments and let us know if there's any difference.

Too much oil is better than too little oil in case you're concerned, but it will be no problem ! :D
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''Bullet the Blue Sky''

Neek.
DIY enthusiast
Posts: 257
Joined: Thu 24 Nov 2011, 20:15
Location: Cape Town

Re: FMX Auto box problems

Post by Neek. » Thu 22 Dec 2011, 22:18

Hi William,

The band adjustments that you mentioned in another thread are perfect, for a C4 !!!!!!!! 8O
''Bullet the Blue Sky''

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