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MRD
23-02-2010, 08:44 PM
Both the D4 and the Pro4 have 39/16 tooth gears, would I be right in thinking they used the same gear set?

Cheers :)
mark christopher
23-02-2010, 08:46 PM
crown wheel and pinion? if so i believe you are correct
MRD
23-02-2010, 10:42 PM
Yea, its the diff gear ones. Pro4 parts are getting a bit thin on the ground and both mine are shot from my crazy 3.5t motor days. A 20t saturn is all thats going in it from now on :).
Jamesy
24-02-2010, 10:22 AM
The only difference between the Pro4 and D4 gears is that the D4 diff gears have round holes for the diff balls, whereas the Pro4 had square holes.

The D4 gears will fit the Pro4 no problem.
Skodes
15-07-2010, 10:52 AM
The only difference between the Pro4 and D4 gears is that the D4 diff gears have round holes for the diff balls, whereas the Pro4 had square holes.

The D4 gears will fit the Pro4 no problem.

Just came across this info after a Google search. It's good to know, cheers man. :thumbsup:

Stu