I have a 1992 standard cab short wheel base. It had a 6 with a auto tranny. I would like to know how to tell which gear ratio I have.

Thanks

Lefty 92

 

There are several ways that may or may not apply.

1) Use the VIN code and see if you can order a build sheet. I don't think you can now, with a 92, but you can try.

2) Use one of the after market VIN decoders. This isn't necessarily accurate, though.

3) Crawl under the truck and see if there's still a tag or label on the rear axle. This also may not be accurate, if the rear ratio has ever been changed.

4) Lift the back end on one side, after chocking the front tires both sides. While it's up, mark the drive shaft so you can count accurately. Turn the back tire up in the air (with the transmission out of PARK!) and see how many turns the driveshaft turns. Just 3 is probably 2.94; 3.5 times is 3.54/3.55; almost 4 is 3.94.

5) Open the rear end and count the teeth on the ring and pinion. This is 100% accurate. It's also the messiest. And requires the most work.

RwP

 

it will also be stamped on the ring gear if you pull the cover.

 

May be on equipment decal under the hood too if it's still there.

Steve