Thread: Engine running but fails to proceed?

Onya

The auto is a (obvious) first place of suspect .... but I thought you could do with an plausible alternative .....

I put that photo up on the shagged spline as , all tho it looks just about sheered, it actually was working OK ... I just happen to stumble over it when searching for something else ...It was jambed into the gears of the center diff and had to be bashed out with a very large hammer

So I can only "imagine" that if it did go, that it would be silent in it's failure, as it would just round the splines completely off
That shaft pictured, was about 250 000 K's old

BUT I'm also leaning, as B92 8NW has said, on a sus Auto .... If I was to upgrade, I would look at the 94 Disco (area) and grab everything from the back of the motor to the end of the tailshafts and give it a upgrade to the lt230 transfer box

I would expect the BW to be on it's way to failure, and if so, and you wanted to keep it original .... then I would order a replacement recon unit, imported directly from Ashcroft UK

love your train of thought of what you have saved, rather than what you have spent .....


Mike

Originally Posted by Lotz-A-Landies

O.K. Gurus

Last evening on the way home from work Vague, my 1985 RRc, let me down. Basically slowing for a set of lights which changed to green as I approached, put my foot on the accelerator but didn't seem to have full drive. Emergency roll around corner into side street using remaining momentum.

No forward drive in high or low range but seemed to have reverse. Then It seemed to have reduced forward drive in low range neutral, but eventually that went also.

Had difficulty reversing up tilt tray even in low range.

How expensive will this be?????

1985 RRc - 4.6 efi, ZF auto, BW viscous transfer.

Diana

Is the vehicle really a 1985 model.
If it is and you are running a 4.6 with the 4hp22 auto they would be a bad thing.
The 1985 model should have an LT230? not the BW. Sounds like an 1995 model

if you're really lucky (assuming its not low oil)its a sticking valve body and youre not developing pressure to fully lock up the first clutch pack.

This is fixable with an extensive flush/replace oil/filter procedure.

If its other than that its generally a box out and overhaul.

Sounds awfully like a Sprag clutch failure to me Diana. The reverse drive although poor and the ability to get a little forward drive can be the correct symptoms for this type of failure. Some models of the 4HP22 in RR's and D1's had a PLASTIC sprag housing...

JC

excuse the high jack, whats a sprag clucth and A clutch
thanks ian

Originally Posted by buzz66

Is the vehicle really a 1985 model.
If it is and you are running a 4.6 with the 4hp22 auto they would be a bad thing.
The 1985 model should have an LT230? not the BW. Sounds like an 1995 model

Errrrrr Argggghhhhhh!

So you are suggesting that I don't know what my Vague actually is, are you?

I have no answer to that suggestion that wouldn't be rude!

Why would a ZF and 4.6 be a bad thing?

what hes getting at is this.

so far as I know only the 3.5 was available in aus in 85

the auto in that version of the rangie is not as robust as the later ones. If you were to retrofit a 4.6 onto that auto you will kill it as its not rated for the oomph the 4.6 has got (it will deal with it for a while though).

IF however youve made a typo and your rangie is a 95 which has a later version of the ZF in it thats a different case.

If youve dropped the whole shebang late model 4.6 with its zf into an early model thats a different story again.

Originally Posted by muddymech

excuse the high jack, whats a sprag clucth and A clutch
thanks ian

Hi Ian,

Ashtrans would be able to give a better description, but here goes...
The Sprag clutch is basically a 1 way clutch, it is simply a housing with a rotating centre member that is locked up in 1 direction of rotation by the action of cam shaped elements between the inner and outer surfaces of the 'drum' shaped housing. The stupid idea of using plastics to construct a member that can and does transfer a fair bit of force is beyond me
The early 4HP22's in RRC's etc and many other vehicles such as Jag and BMW, Volvo etc were mostly steel, only plastics were used later on, I think from about 1995 odd?
An 'A' clutch is forward clutch pack, numbered rather like A pillar, B pillar etc etc.
Anyway, as Dave says usually fitting a 4.6 infront of a 4hp22 can spell disaster if driven HARD, but mine handled it just fine it was eventually the 4BD1T that killed 2 of them

JC