Auto gearbox advice

[Scrappy]

Hi everyone, i have a 1972 2000 auto. Whilst working on the carbs i went out to test the car without the kickdown cable connected. The result was the gearbox changed up and down absolutely perfect (no kickdown though) If the kickdown cable is left disconnected, will it damage the gearbox? It is so much smoother without and i can also drop a gear manually for overtaking. Any thoughts on this or who i can approach?

Thank you, Alf.    

[Pete Lewis]

sounds like the kick down cable and its valve are not set right

the  inner cable should have a small ferule crimped on the carb end which should sit just close to the outer cable abutement

if no ferule is fitted there is little chance of diy setting the kick down valve 

Pete

[Scrappy]

Thank you Pete, there is a ferule on the cable and have adjusted it as per different manuals and does make a bit of difference. The problem is that it hangs on to 2nd gear until you are doing about 45 to 50mph unless you take your foot off the throttle for a few seconds then it goes into top. Without the cable connected it will go into top at 30mph. Very odd as everything feels smoother. I just cant find if leaving it off will damage the box, so i guess i will have to leave it connected.

Thank you again, Alf.  

[Pete Lewis]

it wont hurt the basic box operations   just you loose the override valve to drop a gear when the pressures allow 

i guess you have checked the oil levels hot ??

is this a BW35 ?   

Pete

[Anglefire]

I know Bristol Transmissions (Guess where!) do rebuild old and modern boxes (Auto and manual) and has a good reputation at least for modern ones - but is a good way from you.

[Scrappy]

16 hours ago, Pete Lewis said:

it wont hurt the basic box operations   just you loose the override valve to drop a gear when the pressures allow 

i guess you have checked the oil levels hot ??

is this a BW35 ?   

Pete

Yes it is a 35 Pete. I have gone though the oil level check method, hot in park and after running through each gear... Without the cable attached it performs perfectly. I would leave it off but i don't want to destroy the box unless i know it's safe to do so. Even the oil is nice and clean with no nasty smell to it. Bristol is a bit to far Anglefire   Thank you both for your help, if you here of anything? Can you let me know.

Alf.  

[Guest]

Alf,

G Whitehouse Autos Ltd in Halesowen B62 9JE - 0121.559.9800 are excellent, but certainly not the cheapest.......... however they are very happy to advise and give their advice freely. They do a lot of work with BW35 units and know them upside down & inside out.

www.gwautos.com // info@gwautos.com

Regards.

Richard.

[Pete Lewis]

have you got a workshop manual the 2000 wsm has a lot of 35 and 65 data on testing and fault finding 

i can attempt a scan of the fault finding charts if that would help 

Pete

[Scrappy]

6 hours ago, Pete Lewis said:

have you got a workshop manual the 2000 wsm has a lot of 35 and 65 data on testing and fault finding 

i can attempt a scan of the fault finding charts if that would help 

Pete

Hi Pete, a friend is dropping me a genuine Triumph manual at the weekend as i have only got the autodata one. He said there is a lot about them in it, so i will let you know how i get on. so thank you again.

Alf.

[Scrappy]

8 hours ago, classiclife said:

Alf,

G Whitehouse Autos Ltd in Halesowen B62 9JE - 0121.559.9800 are excellent, but certainly not the cheapest.......... however they are very happy to advise and give their advice freely. They do a lot of work with BW35 units and know them upside down & inside out.

www.gwautos.com // info@gwautos.com

Regards.

Richard.

Hi Richard, thank you for your input and i will certainly give them a ring and see what they have to say. They are also closer than Bristol  I will of course let you know how i get on, but it will be Monday before i get chance to phone them as i guess they won't be working weekends.

Alf.

[Pete Lewis]

9 hours ago, Scrappy said:

genuine Triumph manual

the fault chart is midway about page 2-5.29 in my blue one its   quite elaborate ,takes abit of careful working through 

get some good Tea 

Pete 

[Scrappy]

On 12/02/2021 at 08:10, Pete Lewis said:

the fault chart is midway about page 2-5.29 in my blue one its   quite elaborate ,takes abit of careful working through 

get some good Tea 

Pete 

Thanks Pete, manual arrived this morning and i see what you mean  A blue hardback that will need plenty of tea. Only had to pay in tea and biscuits a well, so very pleased. Will report back. Thanks again.

Alf

[Scrappy]

Hi Pete, the manual is heavy reading as you say but i can't really find anywhere that says for certain it would be ok for the kickdown to remain disconnected. Bit of a strange one really. I have tried phoning the people that Richard kindly gave me the info for, but as yet i can't get through to them..... They might be closed because of furlough. But i will keep you posted if anything happens. Thank you both again.

Alf.   

[Guest]

I've just tried, Alf - straight through to G W on the second ring.

[Scrappy]

2 hours ago, classiclife said:

I've just tried, Alf - straight through to G W on the second ring.

Thanks Richard, i saw your post and rang them again a while ago and got through. You were right about them being helpful, it was a good job that i didn't run to far without the cable as it can damage the box. Upshot is that the problem i have sounds likely to be adjustment probably of the kickdown cable and he will remove the ferule and start again. So once we can move around again i will take it to them and let them sort it out for me   Thank you again.

Alf. 

[Guest]

That's excellent news Alf - as you are there they will probably give the box a running check over; any questions you have, they are the folk to speak with !!

Good luck.

Richard.

[TomL]

 

Hi Alf,

I second Richard's suggestion of Graham Whitehouse.  They did an excellent job on my ZF 4HP22 auto gearbox in the Vitesse.  Very knowledgeable and helpful.  My understanding of the BW35 is that although it's referred to a the "kickdown cable", it needs to be connected at all times as it governs up-changes as well as kickdown.

Let us know how you get on.

Tom

[Scrappy]

On 17/02/2021 at 21:10, TomL said:

 

Hi Alf,

I second Richard's suggestion of Graham Whitehouse.  They did an excellent job on my ZF 4HP22 auto gearbox in the Vitesse.  Very knowledgeable and helpful.  My understanding of the BW35 is that although it's referred to a the "kickdown cable", it needs to be connected at all times as it governs up-changes as well as kickdown.

Let us know how you get on.

Tom

Thank you Tom, i will let you all know how i get on. It wont be until probably April/May when the lockdown has settled. Then hopefully get kickdown sorted  

Alf.