To 10 speed to 13 speed or not?

Unfortunately I don't think mine is convertible. Wish I could.

It's an rtx14609b. I don't think the RTX is convertible.

 

Best to stick to what you have. Lower cost on the transmission, less problems down the road.

Clutch, transmission, U joints and carrier bearing, pinion and mains. Done

 

I like the 10s.

Driven plenty in the 10s and the 13s, I've gotten better fuel economy with the 10.

13 is just more work.

If it's not your fuel, a 13 would be ok. But I promise you, that 435 HP engine is going up that big hill at practicality the same speed with either one.

And in 55 mph states you're gonna regret the 13.

 

Considering the 13 is driven like an 8.

Granny is hardly every used. And the only time the split gets used is max speed and climbing hills.

There are some 13's though that have the low end split instead of the high end split.

 

Because he lacks the big baller mentality? My dad was riding on 24.5’s back 30 years ago, you’ve seen his truck. Its the living large mentality, unless he meant 18 speed and not 18 inch rims.

 

Mine is geared to run 8th over for the most part. I looked at the ratios for my transmission, rtlo14613, and it's single over. What I'd like to do is change from 3.91 to 3.42, which is almost the same as the .87 overdrive, and run in direct.

I'll run down to 1,400, and while creating a hill, instead of dropping a hole, I'll let it pull down to 1,350, but very infrequently. I can't drive it like an N14 or 3406 and let it pull down to 1,100.

BTW, even with a "late" model Detroit, it still is necessary to keep it in the power band. These really dont like to pull under 1,400 which means with a ten speed you've got to shift at 1,900 to pick it up. The 13 makes it so easy. Shift at 1,700 and pick it up at 1,400.

 

Sorry, I forgot the super truckers just want to look rich. Single truck baller, now that's an oxymoron.

 

Now I'll admit that I havent driven an 18 speed, but as far as I know they are 13 speeds that you can split the low range too. I progressive shift the low range, because except on a hill, late model (read from 1989 on) big torque engines will pick it up in the low range. The only time it would appear to be an issue is when you're heavy. In the high range, unless someone can show me I'm wrong, a 13 and 18 are the same. So if you're going over 15 mph, what difference is there between a 13 and 18?

 

Well, technically there is a little. Rtlo41613b 5th direct is 2.70 and rtlo14618b is 2.29, but 8th direct on 13 is direct and 7th over on 18 is direct, effectively giving you more gears in the high range in a 13 speed than in an 18 speed.

 

But but but.....I thought if ya wanna have that REAL super trucker mentality then ya need a 5x4 twin stick. LOL your dads truck is sweet btw

Plus, I figure he didn't have a very good reason for his theory about only have an 18 in a truck with atleast 7 axles.