Back in 1980 my friend had a gmc general, 8v92 with a 13 speed with a 4 speed auxiliary, never did run out of gears on the top side, probably could have hit 100 and still had 13 gears left.
Gear Ratios: Misinformation at its worst.
Discussion in 'Experienced Truckers' Advice' started by Hammer166, Apr 28, 2021.
Page 12 of 17


Trucking Jobs in 30 seconds
Every month 400 people find a job with the help of TruckersReport.

Taller and shorter refers to the diameter of the ring gear
When installed they are on edge and 1 is taller than the other.Rideandrepair Thanks this. 
Back in the day when 12 bolt rear was the thing to have in a GM. You can't put 456 gears in a 3 series carrier and you can't put 308's in a 4 series carrier. Well without serious modifications you can;t.
Rideandrepair Thanks this. 
Rideandrepair and God prefers Diesels Thank this.

If you have 4.11's, and 3.54's, the 3.54's are the taller, longer, higher gear of the two.Rideandrepair, Bean Jr. and Hammer166 Thank this. 
Rideandrepair and Bean Jr. Thank this.

The ring gear tho Not necessarily the pinion.Rideandrepair Thanks this. 
Unless I'm just completely misunderstanding what you're getting at.Rideandrepair, Bean Jr. and Hammer166 Thank this. 
They make a spacer and longer bolts to put say 4.11 on a carrier that had 3.08 or where ever the split was. The ring is the same diameter on both. The pinion is bigger in circumference on higher gears is why the back spacing is different. You cannot however use a 4.11 carrier with 3.08
Rideandrepair and Hammer166 Thank this. 
The answer to the equation is stated as 3.55 to 1.
41divided by 10 is 4.1 so the ratio of the gears is 4.11 and 4.101 is the same answer. The 0 means nothing.
Also 37 teeth divided by 9 teeth is still 4.11 ratio.Rideandrepair and God prefers Diesels Thank this.
Trucking Jobs in 30 seconds
Every month 400 people find a job with the help of TruckersReport.
Page 12 of 17