Your a mack guy. You know the gold bulldogs on the trucks. Why did some come with gold ones and others did not. I hread a couple diff. reasons.

 

When Mack began offering the Maxidyne engine in 1967 the policy was to put gold bulldogs on all Maxidyne equipped trucks.

This continued until about 1980, when Mack began using chrome dogs on all their trucks.

In the mid 90's Mack brought back the gold bulldog, and it was installed on all Macks which had an all Mack driveline ie: engine trans & rear diffs.

Now that we've entered the Volvo - Mack era, there will no longer be such a thing as an all Mack driveline.

 

i knew for a fact about the maxidyne part. But i didnt about the all mack part. I also hread if you got a v-8 e-9 they gave you a gold dog. I guess thats just BS. Well we can kiss the good old mack days good bye. Splitshifter

 

Didn't they have 5 speed transmissions too?

Edit...
"The Maxidyne engine was introduced in 1967, and provided maximum horsepower over a wider range of engine speeds than any other standard diesel engine of its day. The engines design leveled the horsepower curve and as a result, increased fuel efficiency and significantly reduced the need for shifting. It was such an improvement that a transmission with five speeds, rather than ten or more, could be used for most over-the-road applications."

Nothing like answering your own question.

 

5 speeds were for on road trucks & tractors, and the 6 speed "extended range" transmissions were for on/off road use.