pesky gearbox

Sep 04, 2003 7 Replies

now the git's slipping. I dunno, treat it to a n oil change and a new filter, that's bleddy gratitude for you.



I suspect "Clutch A" - definitely sounds like a clutch slipping, and behaves exactly like a slipping clutch on a manual too.



bugger.



Is 450 notes for a ZF 4-speeder plus BW transfer box a decent price? I've the offer of one ex 3.9 RR, supposed to be in good condition, reasonable mileage. Need to know pronto, as I'm off to fetch it in the morning, then all (har har) I have to do is fit it. Might just get a box without transfer, which'd be 200 notes less. Anyone know for certain if there are any differences in the main box depending on which transfer box is fitted?



bloody 175 notes to hire a car for a week, too dammit. But it'd be more hassle and as much expense to put the Sierra back on the road (no tax and MOT)


Buy a nail...then you can always sell it after... Buy a nail with a V8 in....then you can always rob it for the bits after :-) Thats what I did when I was a 2 car person and one conked longterm (we need 2 cars as I work shifts :-( )

Can't the belt be adjusted???? I got the gearbox on my £800 Granny Scorpio sorted for £500 rebuilt the broken bit's only with 12 month warantee...never hot my hands dirty but took some soul searching bearing in mind the purchase price...have to say it is a tidy motor though...criminal they depreciate so much ('93 on a K plate 18 months ago)

Lee

On or around Thu, 4 Sep 2003 23:21:26 +0100, "Lee_D"

enlightened us thusly:

the ZF has a pile of multiplate clutches (like motorbike clutches), There's one that is engaged for all forward gears, and I'm guessing that it's this one that's slipping. However, the 'box is known to have done at least 130K miles, possibly more, so I doubt it's worth doing anything less than a complete re-build on it. Buying another box gives me the option of either rebuilding it meself, or exchanging it at a later date

gotta decide now whether to get a transfer box as well. extra 200 quid, but it'd give me a spare transfer box...

I agree with your diagnosis, but all the clutches will be well worn, it's just that the A clutch normally goes first.

Price is ok if box is good. Some ZF's have a shorter machined spline length on the output shaft and need the correct input gear in the transfer box. Apart from that, all interchangeable, bar the later rangie's ZF4HP24 which is stronger in terms of torque handling but has electronic control over some of the shift points.

Best of luck, Austin. Badger.

On or around 5 Sep 2003 04:46:21 -0700, snipped-for-privacy@hotmail.com (Nick C) enlightened us thusly:

miscalculated, or the luck ran out. lost almost all the forward drive this morning, about 12 miles from home. reverse still fine... decided against reversing 12 miles, though, and parked it up, fetched it back on the big trailer this afternoon.

bought the complete box/transfer box. Turns out to be a Genuine Parts recon, says "Condition E" on the little plate, whatever that may mean.

450 notes, with transfer box and handbrake drum (and linkage, which I haven't got at the moment, so that's a result) but without torque converter (lazy buggers dismantling it, I guess) AFAIK, the TC I've got is OK though.

fun and games next week to fit it - the excellent Mr. Hannaford says that if I put it in and it's wrong, I can bring it back within a week for a refund. Which of course won't get the motor back on the road, but is reassuring.

if it lasts 4.5 times as long as the last one (which only cost 100 quid) I'll be happy.

Out of interest - if you find out what killed the old one will you let us know??

Graeme

but without torque

For gods sake make sure you flush the torque converter out fully or you could end up with another knackered box! Flush with paraffin until it comes out as clean as it went in, get as much out as you can then flush twice with clean fluid (Dexron II?) remember to flush the pipes and cooler as well. Badger.

On or around Fri, 5 Sep 2003 22:33:53 +0100, "Graeme" enlightened us thusly:

old age and patchy maintenance, I reckon. I think it's done between 130K and 140K miles, no idea of the service history.

the primary cause of failure seems to be the "A" clutch, which is basically the "input" clutch to the gearbox for all forward gears, and so gets the most wear, I assume, in normal use. Very likely all the other clutches are worn. It's still got reverse, though, so the ones that do reverse still operate. I was initially of the opinion that it might have been faulty operation of the clutch, but as the symptoms developed, it was pretty clear that it was wearing out. The fact that reverse still works properly rather tends to discount the other causes for no drive, like pump failure or low pressure.

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