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DRIVE TRAIN
CROWN WHEELS AND PINIONS, TR250, TR6
"The Heart of the Differential"
I am not going to list many rebuild components for differentials in this Glove Box
Catalogue. In fact, you can find a complete listing with illustrations onPlates CZand
DAin Volume 1 (Blue) of TRF's TR6 catalogue which is posted online. Similar
coverage is found in the red paper TR250 catalogue on Plate BJ. This section is listing
crown wheel and pinion sets only. There are several qualities of this product in the
market place, and TRF offers ones which are made in Germany. These may cost a little
more, but we have found them to be the best. The diffs we have built with the German
crown wheels and pinions have been quiet and long-lasting. Various axle ratios were
originally offered by Triumph, and the stock ratios are the most readily available.
These are 3.7 : 1 for models with carburettors and 3.45 : 1 for P.I. models. Often used
with A-type overdrive, 4.1 : 1 is also available, and another ratio has reached the
market just as I am writing—it is 4.3 : 1. I am not sure what the application would be
for this one, perhaps a drag car with overdrive! If any other ratios become available, we
will add them to the online version of this catalogue, and we will include them in the
next paper edition.
Part No.
Description
No.Off
List Price
Your Price
Crown Wheel and Pinion Set,
3.7 : 1
1
703.94
ratio, correct for TR250, TR6
models with carburettors
Crown Wheel and Pinion Set,
3.45 : 1
1
703.94
ratio, correct for TR5, TR6
models with P.I.
Crown Wheel and Pinion Set,
4.1 : 1
1
589.95
ratio, often used with A-type
overdrive
NEWLY AVAILABLE
Crown Wheel and Pinion Set,
4.3 : 1
1
589.95
ratio (Drag car with overdrive?)
