Problème boite automatique / auto gearbox

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DARK STAR
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Problème boite automatique / auto gearbox

Post by DARK STAR » Tue Nov 07, 2017 5:46 pm

Eric Cano is making progress with his SE5a but not with the gearbox.

Quelques informations au sujet de ma scimitar : je ne l'ai toujours pas récupéré...
Elle est toujours en Normandie avec des problèmes de BVA
Le joint de collecteur d'échappement a été changé et la voiture ne chauffe plus
J'en ai profité pour déplacer la pompe à essence et changer les bagues au niveau des trains avant par des bagues en polyuréthane
A ce jour il reste à résoudre les problèmes avec la BVA :
La marche arrière ne passe pas et la troisième à du mal à passer. Il faut pousser le moteur dans les tours pour que la troisième passe.
Il manquait de l'huile dans la boite (j'ai ajouté 1 litre d'huile) ... Je suis donc légèrement inquiet

Some information about my Scimitar: I still have not recovered her ...
She is still in Normandy with auto box problems.
The exhaust manifold gasket has been changed and the car no longer overheats.
I took the opportunity to move the fuel pump and change the rings on the front suspension with polyurethane rings.
To date, there are still problems with the automatic gearbox:
The reverse does not pass and the third gear is struggling to pass.
It is necessary to rev the engine so that the third passes.
It was missing oil in the box (I added 1 litre of oil) ... so I'm slightly worried.


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Problème boite automatique / auto gearbox

Post by scimjim » Tue Nov 07, 2017 6:36 pm

Is it a C3 or BW35? Correct gearbox oil level check is always the first action. If that’s okay, drain and see what the oil looks like.


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Problème boite automatique / auto gearbox

Post by DARK STAR » Tue Nov 07, 2017 7:23 pm

I think it's a Ford box but I'll check, there are two Scimitar automatics in work at the moment and I am easily confused.
The level should be ok, that's why he added a litre of fluid.


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Problème boite automatique / auto gearbox

Post by scimjim » Tue Nov 07, 2017 7:29 pm

DARK STAR wrote:
Tue Nov 07, 2017 7:23 pm
The level should be ok, that's why he added a litre of fluid.
I’ve heard that before, hence I reiterate that the correct method of checking needs to be carried out :D


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Current: SE5 (8Ball), TI SS1 (snotty), 1600 SS1 (G97), 1600 SS1 (C686CCR), 2.5TD SE5a (diesel 5a), 6 x random other SS1s.
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1300 SS1 (Number One) & Sarah's coupe.
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Problème boite automatique / auto gearbox

Post by DARK STAR » Tue Nov 07, 2017 8:00 pm

:mrgreen: :mrgreen: :mrgreen:


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Problème boite automatique / auto gearbox

Post by philhoward » Tue Nov 07, 2017 11:16 pm

If it’s a BW35, the adjustment of the “kickdown” cable is very important.

Easy check - if it’s got a corkscrew of pipe at the back of the engine connected to the inlet manifold (same tapping as the brake servo) and the gear lever has a rod attached to it, it’s the C3. If there’s no pigtail and the gear lever has a U shaped cable on it, it’s a BW35.


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Problème boite automatique / auto gearbox

Post by Roger Pennington » Wed Nov 08, 2017 12:11 am

I'd echo Jim's point about correct checking of the level, and also wonder what type of oil he added?


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Problème boite automatique / auto gearbox

Post by Paul Hill » Wed Nov 08, 2017 12:31 am

Also check your vac pipes :idea:


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Problème boite automatique / auto gearbox

Post by scimjim » Wed Nov 08, 2017 12:53 am

Would vac pipes and kick down cable affect reverse?


Jim King

Current: SE5 (8Ball), TI SS1 (snotty), 1600 SS1 (G97), 1600 SS1 (C686CCR), 2.5TD SE5a (diesel 5a), 6 x random other SS1s.
Previous: SE5, 3 x SE5a, 2 x SE6a, 3 x SE6b, GTC, 2.9i GTC, 3 x 1600 SS1, 1300 SS1, Mk1 Ti Sabre, Mk1.5 CVH Sabre
Chief mechanic for: 1400 K series SS1 (Megan3), 1400 CVH EFi SS1 (Grawpy), Sabre/MX5 auto (The Flying Broomstick),
1300 SS1 (Number One) & Sarah's coupe.
CURE THE FAULT - NOT THE SYMPTOMS

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Problème boite automatique / auto gearbox

Post by DARK STAR » Wed Nov 08, 2017 10:30 am

It's a BW35 if that's any help ...


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Problème boite automatique / auto gearbox

Post by DARK STAR » Wed Nov 08, 2017 10:32 am

PS what is 'kick down' please because I need to explain it in french :lol:


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Problème boite automatique / auto gearbox

Post by philhoward » Wed Nov 08, 2017 10:50 am

Kickdown is the last 5% of the throttle travel that asks the gearbox to change to "maximum acceleration" mode.

On a Ford C3, that's all it does - tell the gearbox to kickdown.

On a BW35, it tells the gearbox how much load is being requested for it to adjust its change-up/down speeds accordingly. On a C3, this is done by manifold vacuum and a modulator fitted to the gearbox (for reference).

The kickdown cable won't affect reverse gear operation but can affect how and when it changes gear.

Low fluid level does affect change-up/down behaviour and (I think) will also prevent reverse gear working if it's low, but has enough fluid to (sort of) work in forward gears. There are other possibilities for why reverse doesn't work, but oil level is the first one to check, and properly. It's a long winded process too and must be followed to the letter. It is in the handbook - and if you don't have it, it's on sporting-reliants.com (although only in English..).
Auto_Fluid.JPG
Auto_Fluid.JPG (125.24 KiB) Viewed 154 times
The procedure for the C3 is different (engine to remain running).


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Problème boite automatique / auto gearbox

Post by philhoward » Wed Nov 08, 2017 10:51 am

Paul Hill wrote:
Wed Nov 08, 2017 12:31 am
Also check your vac pipes :idea:
scimjim wrote:
Wed Nov 08, 2017 12:53 am
Would vac pipes and kick down cable affect reverse?
No vac pipes on an BW35 box.


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Problème boite automatique / auto gearbox

Post by DARK STAR » Wed Nov 08, 2017 1:15 pm

Ok so kick down is a sort of maximum throttle signal which tells the gearbox to change down.
Thanks for all that, I'll translate the essentials and re-post ;-)


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Problème boite automatique / auto gearbox

Post by philhoward » Wed Nov 08, 2017 1:23 pm

Pretty much, Chris.

Difference between the 2 gearboxes is it can be left off the C3 (I think Roger has his disconnected?) with no adverse effects. If it’s missing, broken or maladjusted on a BW35 it results in box failure in short order.


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SE5a Barn Find Project 24 Valve conversion
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http://www.ss1turbo.com
Never try and argue with an idiot. They drag you down to their level, then beat you based on experience.

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