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Re: 5:38 gears [Re: barak] #856185 12/31/07 04:55 PM
Joined: Jan 2001
Posts: 2,281
Curtis Johnson Offline
Body Damage is Cool
Pilot Bob is running 5:38's and turning 33's with a 3.4 and an automatic. He is very happy with the combination.
He says it will cruise highway speeds all day and still climb like a goat with the Tera Lows. IIRC he reported the milage at about 16 mpg. 17 if the wind is low. And that's pulling a trailer to the Davis Mountains.
I even called him to confirm my info is correct.

Mileage will always get better the more vaccuum you can pull on the intake. High Manifold Vaccuum # means a happy engine.
Lug the motor and you kill your milage. Enigine is working too hard.

Just call me The Gadget Master!![/b]
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Re: 5:38 gears [Re: barak] #856186 12/31/07 04:57 PM
Joined: Sep 2003
Posts: 1,871
onebadtrooper Offline
Body Damage is Cool
swap in a MUA <img src="/forums/images/graemlins/smile.gif" alt="" />.

I'd go for the 5.38's my tires are worn down to 33's and Its just about right.

89 trooper, tera low t-case gears,5.38's, 3" indy4xsus lift3"body lift,safari snorkle,warn winch,custom bull bar,custom rock sliders,warn hubs,35x13.50r15,custom rear bumper trooper pics
Re: 5:38 gears [Re: onebadtrooper] #856187 12/31/07 05:05 PM
Joined: Jul 2001
Posts: 1,810
paulevans76 Offline
Body Damage is Cool
w/ a SC in the future, it may not be worth the trouble. Perhaps you should wait until after that upgrade to decide whether or not to install or sell the gears. But for anyone in the sub 200hp range (most of us) running 33"+ rubber, the 5.38's are a great upgrade.

88 Troop - Posing yard art
Re: 5:38 gears [Re: paulevans76] #856188 12/31/07 06:16 PM
Joined: Jan 2000
Posts: 2,437
lttlbddy Offline
Body Damage is Cool
If you are going to put a locker in, it makes more sense to do the gears too (cost wise).

Re: 5:38 gears [Re: lttlbddy] #856189 01/01/08 12:07 AM
Joined: Jan 2005
Posts: 1,528
barak Offline OP
Body Damage is Cool
Thanks for that reply curtis , that helps with info a lot with the same combination I have of engine and trans.I don't do much pulling , but one day might get a small trailer for hauling my motorbike with me , so then I can 4x and ride the bike around town and stuff too.

I do have a lockright locker in the front end right now , and maybe down the road will get a 12 bolt locker as that is a lot easier to install , not as much to do to tear apart the carrier.

I was more into what I would gain with the 33" tires by going to the 5:38 , whether it would up the mileage , or improve driving performance around town or on the highway.But if it does make a noticeable difference with the 3.4 and auto tranny , then I might go ahead and do the upgrade.especially if it will make a difference when i do start towing the odd thing , maybe even a small camper trailer if I end up getting another one of those.

1996 Jeep Grand Cherokee 5.2 with mods.Hughes Air gap intake , 52MM TB , ford injectors, 2 3/4" lift, Doug Thorley headers , HID headlights with LED , HID fog lights , glow gauges , a few others
Re: 5:38 gears [Re: barak] #856190 01/04/08 03:09 AM
Joined: Oct 2001
Posts: 945
maxwell417 Offline
Rock Warrior
I loved my 5.38s, before the front diff fragged.

In my 3.4v6 a/t Trooper highway performance was much better. The transmission didn't have to down shift for every hill. And I could pull my pop up trailer with ease.

The overall highway gearing is similar to my 89 Trooper RS with 4.77s and 5 speed.

Curt B 89RS Calmini Header Delta Cam 33x10.5 BFG MTs & 90 Trooper 3.4 v6, SAS D44 ARB/Hobart 5.38s 35s my pictures
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