Ba 4 Speed Auto Slipping?

[falcon73]

How can you tell if the 4 speed auto is slipping.

This box has been maticulously maintained etc

I have noticed this since last time at the drags and I have only driven the falcon twice since and tonight I gave it a good going due to a reseting of the ECU.

When it coolish the box grabs well and slams second gear hard with the shift kit etc but once up to running temp it seems to slip a bit when changing gears and get a bit of a shutter occasionally when power is put down hard.

I think by memory Castrol trans oil but dont quote me, the trouble started after I did the recent exhaust changes and dropped from 14.47 to 14.21 1/4, it was fine, then played with motor abit more and that's when it started. Car is a lot stronger just seems the auto is not handling as well putting the power through to the wheels

I am thinking maybe some trans upgrades bands seals whatever can be done plus better oil any recommendations

Any help appreciated

[Ninka]

Sounds like band or clutches have reached the end of their useful life.

Be careful driving the car for too long like this, as it is quite common for the 2/4 band to lose the lining, and then run metal against metal, which can damage the drum they run on.

Strengthening the 4 speed is mainly done by modifying the valvebody, which will make the band and clutch grab harder, which will also be the case in moderate city driving, making the car bit jerky, or certainly shifting quite hard.

Hope this helps.

Edited 07/06/08 01:07 AM by Adam

[falcon73]

Thanks mate, what are the possibilities of a Turbo 4 speed fitting in behind a N/A.

Are they stronger?

[Ninka]

They will fit, but I believe the 'T' boxes are only stronger because of clutches having different material in them, so you may as well upgrade your own if it is otherwise in good condition.

[falcon73]

Any idea of cost to do that, approx would be fine, gotta take it to the minister for war

[Adam]

Around $2200. Give or take a bit.

[falcon73]

Another question, If I got a XR6T box and wanted to just do a frshen up type service on it before install, can this be done and what would cost in servicing a T Box.

Sorry for the Q's, havent dealt much with the box before

[Adam]

I think it's best if you call some of the places that rebuild these and ask them your questions.

[falcon73]

I would like to do that but unfortunatley time poor, weekend public holiday and then work in a call centre makes it hard, I wish to now asap as I have an opp at a replacement through a friend at a cost so trying to ascertain which would be the better way of going cost wise and as said havent had much to do with the boxes

[XR6_661]

I just got myself a reconditioned gearbox from brissie....$1800 fitted inc. freight to cairns.

I could get you the details of the company that sells them in brissie if you want