Thread: ZF gearbox question - petrol & diesel D1s

AFAIA it is the same a ZF4HP22

different ratios in petrol and deisel

Originally Posted by 87County

My question is: regarding the D1 ZF gearbox.....

Is the gearbox used in the V8 any different from the one used with 300 tdi ?

- if it is different - what are the points of difference ?

thanks

Different valving/shift points/ bellhousing/Torque convertor, I'm not sure about the gearing, Regards Frank.

Originally Posted by INDABA

different ratios in petrol and deisel

so.... do you know what they are ?

(RAVE indicates differing lock-up and change speeds tdi/V8, so I can understand Tank's comments but RAVE gives no reference as to ratios)

if it is just valving -does anyone know if a simple valve block change enables a ZF that was in a V8 to be installed in a tdi ?

(because 2nd hand ZFs that are/were in V8s are available very cheaply)

one of the projects Ive got on the side is a semi dead v8 auto that I was going to strip down to show how it all works...

if youve got a TDi one down there and it can be gotten to here then Im happy to lay spanners on to find out whats different where.

Originally Posted by Blknight.aus

one of the projects Ive got on the side is a semi dead v8 auto that I was going to strip down to show how it all works...

if youve got a TDi one down there and it can be gotten to here then Im happy to lay spanners on to find out whats different where.

Thanks Dave, the one in question isn't mine - but it's in a tdi and is "slipping" (according to the owner) so I'm anticipating some repair/replacement action action will be required in the near future and I was wondering if a cheap alternative is a V8 D1 ZF.

Originally Posted by Tank

Different valving/shift points/ bellhousing/Torque convertor, I'm not sure about the gearing, Regards Frank.

All the above but the main thing is the input shaft and front pump as they are made to handle the vibration.

Cheers Casper

as a temporary fix you can use a slip stop additive

http://www.wynns.net/product_files/A...4506%20PIS.pdf

Lucas automatic transmission additive stop slip | eBay

Lucas Automatic Transmission Fluid Conditioner - 591ml | eBay

it'll help put off the inevitable...

you might get lucky and find that the "slipping" is actually the TCLC on the way out which means if you do an oil sample and its got fine black floaties in it a fluid change to prevent further damage will allow you to just replace the TC without having to rebuilt the box.

relying on those addatives is just going to make the final repair cost higher as the damage done will be greater.