Diff Ratio 3.8

[gsgib55]

I now have 3.73 in my Crewman ute 5.7 , best decision since owning it , lower revs , amazingly smooth gear changes AND fuel economy of 32 mpg or 14 kms to the liter. Is there a ratio available of 3.8 to fit the Crewman or will I have to go to 3.9 , I find the 3.73 is just slightly slow off the mark owing to the larger size of the Crewman . If anyone should have a diff to suit Crewman with a ratio of 3.8 I would really like to hear from you . Garry

 

[krusing]

Any Ratio can be used,[specified for Holden for that Series]
And it all depends on the size of the tires you are running,
Based on that, you will just need to alter PPK to suit the Ratio & Tire combination.

 

[gsgib55]

thanks for the reply , but I find it a little confusing , by what do mean 'any ratio can be used' ,

 

[vr304]

3.9 is the next one up from 3.73 mate, you could get a hi stall converter for getting you off the mark quicker and general better acceleration down low

 

[Immortality]

The common ratio's are 3.07, 3.46, 3.73, 3.9, 4.11

The difference between 3.73 and 3.91 is about 100rpm at 100km/h.

Gearing Analyzer with Shift Tracer

Enter gear ratios, tire and diff ratio to analyze RPM vs velocity at shift points with tracer

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[VYCommodore76]

by common, he means these are the only ratios available.

 

[gsgib55]

3.9 is the next one up from 3.73 mate, you could get a hi stall converter for getting you off the mark quicker and general better acceleration down low

hello , and thanks for the reply , would going to 4.1 over 3.9 be an option ?, garry

 

[vr304]

hello , and thanks for the reply , would going to 4.1 over 3.9 be an option ?, garry

I personally wouldn’t, too short of a diff gearing in my opinion

 

[losh1971]

Which trans do you have?