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Unread 05-18-2013, 02:11 PM   #1
breakthru
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1985 CJ7 
 
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Gears for runnin 35's?

I don't do much off-roading but I like the look of 35's. What would be best gear ratio overall for 90% weekend cruising at 45 mph and 10% off-roading? Looking for good gas mileage and being able to use 5th gear. Lol. Any recommendations on brand?

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1985 CJ-7 258ci with a T5 tranny, Dana 300 t-case with Tera Low 4:1, 4" sagging Suspension lift, Warn floating axles, all around disc brakes, DUI Distributor, stainless brake lines, flexalite dual electric fan, weber carb, and 33 AT. Future mods include going to 35's under a Rubicon Express lift with full body replacement, interior restore and train horn... with time, money, and weather permitting.
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Unread 05-18-2013, 02:24 PM   #2
CJ7KAHUNA
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Quote:
Originally Posted by breakthru View Post
I don't do much off-roading but I like the look of 35's. What would be best gear ratio overall for 90% weekend cruising at 45 mph and 10% off-roading? Looking for good gas mileage and being able to use 5th gear. Lol. Any recommendations on brand?
4.56 is what I have. I dont have 35's yet but will have within the next month or so. I am currently running 33's and I start off in 2cd gear. I figure 35's will still be low in 1st gear but not granny low if you get what I am saying.
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Unread 05-18-2013, 03:38 PM   #3
gogop66
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There are a couple of charts, check here: http://www.jeep4x4center.com/calculators/index.htm

Most say 4.56
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Unread 05-18-2013, 03:43 PM   #4
BlueRubiconrich
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you like the look. It's not about look. I run 35" tires with 3:73's but I have a
t18 and a Scoutr Dana300. plus Dana 44's with lockers. It's about can your axles/ujoints stand up to 35" tires.
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86 CJ7 258,T18,Scout Dana300,twin sticks,Dana44's,4W Disc, locked,35's,YORK OBA,Warn 8274,fullcage.
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Unread 05-18-2013, 03:54 PM   #5
Headingout
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I have 33's and 4.88's and I'm happy with this combo, it is lower than stock overall and feels good.
I can also easily start off in second gear,
the 4.88's give great low speed trail running in first, while still having enough legs to run with traffic on the highway.
I would go 4.88 and the 35's for weekend cruising.
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Unread 05-18-2013, 04:08 PM   #6
BlueRubiconrich
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Don't forget a 85 CJ7 has the small dana 30 Ujoints!.going 4 wheelin?
when running big tires such as 35" think about that maybe upgrade
to a Dana 44 with a bigger ring gear then go to 4:10's or lower.
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86 CJ7 258,T18,Scout Dana300,twin sticks,Dana44's,4W Disc, locked,35's,YORK OBA,Warn 8274,fullcage.
51 M100 1/4 ton Jeep trailer
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Unread 05-18-2013, 09:00 PM   #7
aero mech
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Running 35s with 4.10 after running 33,s I think unless you have a five speed you will find 4.56 too low. I turn about 2700 at 65
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Unread 05-19-2013, 06:32 AM   #8
MSBXCJ
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I had 2.73 with 35s and regeared to 4.56 with same 35s and love it. It is perfect for driving around town and about 2-3 times a year I take it to Hidden Falls in Marble Falls to do some wheeling with friends. It has made a world of difference and worth every penny.
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Unread 05-19-2013, 09:46 AM   #9
arg0413
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I run 35's with 3.54 gears and stock axles.. I have a T18A and a D20, I start out in 2nd gear and cruise at 2300 RPM at 65MPH, for what your doing it's perfect!! If you don't go off road, dont worry about your axles, I offroad my Jeep non stop with stock axles and lockers, and I've never broken anything (granted I don't have rocks here in Louisiana, it's mostly mud and creeks). Honestly I have a friend with 44s running the D30 and AMC20 (open axles) and has never broken anything!!! lol and he has a SBC under the hood!!! What gear ratio do you currently have?
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Unread 05-19-2013, 10:29 AM   #10
Jack61
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4.56 gears should be perfect all around for you especially with the less than stellar T-5 trans
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Unread 05-19-2013, 01:41 PM   #11
capt205
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4.56's with 35x12.5x15 BFG KM2's D30, T176, D300, D44, 258.

Puts it in the sweet spot for both on and off road
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Unread 05-19-2013, 09:47 PM   #12
breakthru
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Thanks all! I run 3.73's now. When I say off road, all I mean is mud holes... No rocks here either... FL.

258, D300 with terra low and full floating amc20.
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1985 CJ-7 258ci with a T5 tranny, Dana 300 t-case with Tera Low 4:1, 4" sagging Suspension lift, Warn floating axles, all around disc brakes, DUI Distributor, stainless brake lines, flexalite dual electric fan, weber carb, and 33 AT. Future mods include going to 35's under a Rubicon Express lift with full body replacement, interior restore and train horn... with time, money, and weather permitting.
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Unread 05-20-2013, 08:01 AM   #13
breakthru
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Any recommended brands that are good???
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1985 CJ-7 258ci with a T5 tranny, Dana 300 t-case with Tera Low 4:1, 4" sagging Suspension lift, Warn floating axles, all around disc brakes, DUI Distributor, stainless brake lines, flexalite dual electric fan, weber carb, and 33 AT. Future mods include going to 35's under a Rubicon Express lift with full body replacement, interior restore and train horn... with time, money, and weather permitting.
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Unread 05-20-2013, 08:04 AM   #14
breakthru
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Any highly recommended brands?
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1985 CJ-7 258ci with a T5 tranny, Dana 300 t-case with Tera Low 4:1, 4" sagging Suspension lift, Warn floating axles, all around disc brakes, DUI Distributor, stainless brake lines, flexalite dual electric fan, weber carb, and 33 AT. Future mods include going to 35's under a Rubicon Express lift with full body replacement, interior restore and train horn... with time, money, and weather permitting.
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Unread 05-20-2013, 08:06 AM   #15
capt205
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I went with G2 4.56 and Truetracs front and rear from 4 Wheel Parts.

I regeared my 2003 F350 in 08 with Genuine Gear from 4 Wheel Parts, 100,000 miles later, still no issues. Went from 3.73 factory, to 4.10 with Truetrac's front and rear.
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