regearing to 4.10 or 4.56s? cant decide
CF Veteran
Joined: Sep 2010
Posts: 21,168
Likes: 5
From: Milwaukee, WI
Year: 1987
Engine: Check
I will toss my experience in...(87 two door, 4.0, manual trans)
My 4.10s on 31s sucked. It was waaay overgeared. First gear was absolutely useless on the street. And I always found myself wanting a 6th gear on the highway.
Then I went to 33s. And first gear got a LITTLE more useful, but IDK. It still feels a bit overgeared, but the power is nice.
My 4.10s on 31s sucked. It was waaay overgeared. First gear was absolutely useless on the street. And I always found myself wanting a 6th gear on the highway.
Then I went to 33s. And first gear got a LITTLE more useful, but IDK. It still feels a bit overgeared, but the power is nice.
CF Veteran
Joined: Feb 2010
Posts: 1,152
Likes: 1
From: La Habra, CA
Year: 1988
Engine: 4.0 RENIX
with my experience, i would tell you to gear lower (4.88). I'm running 4.10s on 235/75s and an AW4 and i just love it. turn about 2500 rpms @ 70 mph, gives me excellent power and good fuel economy. with your ax15 though you could probably get away with 4.56, although i'd prefer the extra gear to compensate for the increase in rolling mass of the 35s. don't be afraid to rev that 4.0 on the highway
CF Veteran
Joined: Sep 2007
Posts: 4,869
Likes: 14
i ran 5.38s with my 35's.
absolutely loved it. put tons of miles on it, cruised at 70-75 mph for 32 hours at a time. got 15 mpg doing so as well in a fully loaded rig with wheeling and camping gear for 3 guys to survive a month.
if you already narrowed it down to 4.10s vs 4.56, then definately go for the 4.56s if we can't sway your mind to go a tad lower.
absolutely loved it. put tons of miles on it, cruised at 70-75 mph for 32 hours at a time. got 15 mpg doing so as well in a fully loaded rig with wheeling and camping gear for 3 guys to survive a month.
if you already narrowed it down to 4.10s vs 4.56, then definately go for the 4.56s if we can't sway your mind to go a tad lower.
Senior Member
Joined: May 2011
Posts: 749
Likes: 1
Year: 1997
Model: Cherokee
Engine: 4.0
huntingman, i never heard of that daw gon foreign word panacea either.
not to thread jack but what about 33s and an aw4. 4.10s or 4.56.
i do 4-500 miles a week hwy. looking for 14.5 mpg.
not to thread jack but what about 33s and an aw4. 4.10s or 4.56.
i do 4-500 miles a week hwy. looking for 14.5 mpg.
CF Veteran
Joined: Nov 2011
Posts: 7,387
Likes: 10
From: City of Trees, CA
Year: 93 2 door
Model: Cherokee
Engine: 4.0
my 8.8 has LSD. does that make it harder to install a full case or something?
these clutch packs are probably already passed half life and I havent even installed it yet
Last edited by Atmos; May 12, 2012 at 03:34 PM.
CF Veteran
Joined: Nov 2011
Posts: 7,387
Likes: 10
From: City of Trees, CA
Year: 93 2 door
Model: Cherokee
Engine: 4.0
the gear calculator puts 4.56 above stock rpm for 33's Aw4. with added weight and wind resistance etc (the things the gear calc doesnt account for), would that pretty much put you back at stock rpm?
I'll want 34's or 35's in the future. that wont feel to bad will it?
I'll want 34's or 35's in the future. that wont feel to bad will it?
MJ>XJ
Joined: Mar 2009
Posts: 17,836
Likes: 7
From: Griffin, G.A.
Year: 1990
Model: Comanche
Engine: 4.0 I6
Originally Posted by Atmos
I have a question about that^^
my 8.8 has LSD. does that make it harder to install a full case or something?
these clutch packs are probably already passed half life and I havent even installed it yet
CF Veteran
Joined: Sep 2009
Posts: 1,142
Likes: 2
From: Grand Prairie, Texas
Year: 1998
Model: Cherokee
Engine: 4.0 HO I6
I just regeared my jeep to 4.88 and I'm running 33's, soon to be 35's. Its awesome off road and on the highway. Gas mileage has gone back up to almost 17 on the highway.