Need some advice regarding 4L80E and gears

i ran 4:11s with my 80e and it was great, even for a DD, remember the 80 e and 60e have the same overdrive gear ratio so nothing will change on the highway, also i liked the 80 much better because 1st shifted out at 49 2nd shifted at 91 and 3rd shifted at 152, never found out how high OD would go :devil: this AWD trans will be getting an 80 when it gives up the ghost.

Im pretty sure the 80 has a .75 OD and the 60 has a .70 OD so not much difference probably 100-200rpm at highway speeds.

I wouldn't worry to much about the gear ratio difference.

Quote:

---

Originally Posted by silverado_lover

So it seems my 4L60E has bit the dust and I'd like to replace it with a mild 4L80E but I'm concerned about the loss of low end power due to the tall first gear. Currently I have 3.42's and 29" tires and it seems this combination isn't very desirable with a 4L80E, my truck will mainly be used for just having fun on the streets and the occasional drag strip run. I will also be taking it on the highway since it'll be my DD till I can pick up something else for a DD, so what gears would y'all recommend? I was thinking probably 3.90's but I'm not certain.

Future mods include a Vinci Trucker cam and a Yank 3200 and wayyyy on down the road probably a turbo.


Or would y'all just recommend that I rebuild my 4L60E?

Thanks in advance fellas :melissa:

---

I run a 30" tire with USA standard gear 4.10's and a True Trac from Ron's and I love it. Highway mileage did not change a measurable amount and in town mileage increased. I am starting my 80e swap within the month with a 258mm Circle D 3600. Why not just do the converter now to not hassle with changing it out later? Even stock engines benefit greatly from a stall.

Quote:

---

Originally Posted by Botlfed

i ran 4:11s with my 80e and it was great, even for a DD, remember the 80 e and 60e have the same overdrive gear ratio so nothing will change on the highway, also i liked the 80 much better because 1st shifted out at 49 2nd shifted at 91 and 3rd shifted at 152, never found out how high OD would go :devil: this AWD trans will be getting an 80 when it gives up the ghost.

---

60e is 0.696 OD and the 80e is 0.75 OD. So if you're at 2,088 cruising at 65mph with the 80e you will be at 2,250 rpm's.

guess, i never noticed to rpm change but 150rpms at speed isnt that big of a change to worry about.

Quote:

---

Originally Posted by screaminchicken

Why not just do the converter now to not hassle with changing it out later? Even stock engines benefit greatly from a stall.

---

Mainly because I'm a broke college kid who needs his truck back as soon as I can get it :point:

If I had the funds to put a stall in while I replace the trans I would definitely do so...I applied for a better paying job last night, so hopefully they start hiring soon. Minimum wage sucks :(

Im in the same boat :lol: I'm doing my 80e swap in a 10x18.5 storage unit with no heater in Wyoming.

sounds like you need an extension cord and a portable heater. I wired up an LT1 in my 92 truck in mid january is 20 degree weather at night. I had a truck tarp over the hood, shop light hanging from the underside of the hood and had a space heater under there working on it in short sleeves while in the middle of my driveway. :)

Ha yup, gonna use a tarp to close off the underside and just heat that.

Quote:

---

Originally Posted by silverado_lover

Mainly because I'm a broke college kid who needs his truck back as soon as I can get it :point:

If I had the funds to put a stall in while I replace the trans I would definitely do so...I applied for a better paying job last night, so hopefully they start hiring soon. Minimum wage sucks :(

---

I have a 60e i would donate to the silverado lover truck build when i get it out of my truck. i will help you install it to. just need to figure out if we can convert it from 4wd to 2wd. may be a few weeks though.

Maybe i can do something about that job situation to. PM me if your intrested