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Woolys_CJ7 10-20-2009 12:52 PM

Drivetrain Build Advice – Trail and Second vehicle use, for now
 
We are starting out with a high mileage (over 250,000) CJ7 with a fresh motor that sat for the last 6 years and turning it into a reliable daily driver that will be used part time (soon to be 16 year old daughter drives my car when needed I take Jeep to work). Besides being a fun let’s take the Jeep, I want to make this a capable trail rig for the desert and mountain trails in Arizona along with an occasional trip to Glamis. I’m currently going through the Jeep to make it extremely reliable, painless wiring and central ground, changing all fluids, replacing any worn suspension and steering components. What I’m asking for is the groups thought on the following plans below.
Current:
• 2.5 inch **** Cepek lift
• 31’s
• Keep the narrow axle look
Planned upgrades:
• Truss and weld the AMC20 axle tubes when I put in one piece axles.
• Detroit Truetrac’s front and rear
• Tube front fenders
• TJ rear flares with body trimmed to match
• 33’s or 35’s
Questions:
• Will 35’s fit with the body modifications and current lift?
• If I go 35’s will I have to re-gear from the 3.54 to?
• Are there narrow track axle upgrades?
Thoughts, what will I break with the larger tires? Other input?

Thanks,
Wooly

kickingprop 10-20-2009 01:33 PM

There are NT upgrades the same at the WT axles, but I'd seriously recommend finding a good set of WT axles (that have already been re-geared to 4.10 or so) and swap those in. The gearing will be right for the 33-35" tires.

Trussing and welding the AMC20 will make it plenty strong for those size tires, actually stronger than a Dana44.

As far as Re-gearing also goes...if you are going to put in Tru-Tracs front and rear you'll have to re-set backlash, etc anyway so you might as well (Aggghhh The dreaded MAW's!) re-gear then while everything is out.

Do you run a 4 or 5 speed transmission and will you use it on the highway? this will help determine the best gearing.

TrueTrac's are pretty solid and will do well in most offroading situations.

Front Tube fenders...tons of people make them and they are all great products for the most part I like Kings OffRoad's Products - KORE, King's Off Road, King's Off Road Enterprise, Off Road Chassis Turn-Key Buggies

That link is for the YJ fenders but he always has CJ tube fenders in stock (website just hasnt been updated in a while)

the TJ flares, tube fenders, and body trimming should give you plenty of clearance for 35's if you go to a 4.5" Lift...I dont think 2.5 is going to be enough personally unless you wont be putting it in any flexy situations.

If its going to be getting a lot of city/highway use I'd also consider going to 4 wheel disc breaks. Lots of great DIY writeups out there and complete setups as well depending on how much you want to spend. But power 4wheeldisc brakes will make it MUCH safer to drive than manual drums...


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