what size tire? the 4.10s will be much nicer with the 80es first gear...but the higher OD gear kind of hurts too, depending on tire size. How much highway, etc? Personally, i like deep gears for DD purposes, but mines mostly street driving.
Too much gear?
Hey guys...
getting ready to do my 4.3 -> 6.0 swap, however going to do gears and an ezlocker first... I was planning on doing 4.10 gears as in my previous experience, the motto was dont fear the gear. This will be a DD, and i will be running a 4l80E with a 3200 stall... too much gear? Should i be looking into 3.73? Thanks.
getting ready to do my 4.3 -> 6.0 swap, however going to do gears and an ezlocker first... I was planning on doing 4.10 gears as in my previous experience, the motto was dont fear the gear. This will be a DD, and i will be running a 4l80E with a 3200 stall... too much gear? Should i be looking into 3.73? Thanks.
1 - 16 of 16 Posts
Joined
·
5 Posts
The tire will be a 255/45 on a 20" rim. It'll be 80% city streets, 20% highway... if we do highway driving already, wife drives her 350z.
Joined
·
611 Posts
i ran 410s with my old setup and was crusing at 2200 rpms at 70mph with a 30" tire
if i was going to do ti again i would of went 430s to help with 1320 performance
you should be fine knowing the 80 robs so much and has horrible stock gearing for NA applications
if i was going to do ti again i would of went 430s to help with 1320 performance
you should be fine knowing the 80 robs so much and has horrible stock gearing for NA applications
Joined
·
5 Posts
Thanks Quik, thats pretty much what i thought. ill stick with my gut on this one and shovel in the 4.10s.
Joined
·
5 Posts
255 works out to be just about 29" tall, which will put me about 2250?
I wonder if they make somewhere in the middle of the road 3.90s for these trucks, like they do mustangs. search time.
Joined
·
47,426 Posts
Uh no, smaller diameter tire (rotates faster) = higher RPM. 2494rpm @ 70mph.
Yes, a 3.90:1 gear set is made.
Joined
·
5 Posts
Whoops, duh.. :bawl:
Joined
·
4,762 Posts
2500 rpms isn't going to hurt anything cruising down the highway. He already stated that only 20% of his driving is on the highway. 4.10's should get better mileage in town due to less force needed to start things rolling. Alot of 6.0's came stock with 4.10's and the 80E from the factory so it can't be that bad of a combination. Plus the 4.10's will allow for the extra rotational mass of those 20's.
Joined
·
47,426 Posts
2500rpm on the freeway is going to hurt your economy and is unneeded wear. 2000-2200 is far better for the freeway, I think we all agree on that.
Also, too much gear can be bad for in town cruising. I prefer to keep the vehicle in whatever gear is direct (1:1) so it is not constantly shifting in and out of OD. I figure 50mph I can handle about 2000-2200rpm there, so around 40mph it's even less.
If you're overgeared, you'll have OD engaged and have you at the bottom of your powerband and without you'll rev too high. Just something to think about.
Also, too much gear can be bad for in town cruising. I prefer to keep the vehicle in whatever gear is direct (1:1) so it is not constantly shifting in and out of OD. I figure 50mph I can handle about 2000-2200rpm there, so around 40mph it's even less.
If you're overgeared, you'll have OD engaged and have you at the bottom of your powerband and without you'll rev too high. Just something to think about.
1 - 16 of 16 Posts
