Birty Dastards Jeep Club

Tech Forum => Workshop => Topic started by: Syncro stan on June 29, 2014, 07:37:13 PM

Title: Newbie advice
Post by: Syncro stan on June 29, 2014, 07:37:13 PM

Looking to pick up a 60th anniversary this week, 4.0 litre petrol, auto box, want to run 265/75 16 Wrangler duratrac. What gearing issues could this cause, oh 3" lift kit as well. Thanks in advance.

Title: Re: Newbie advice
Post by: JamesH on June 29, 2014, 09:22:51 PM

You'll have 3.55 gears and would want 4.10 to correct back to stock with the 265/75/16. It will change gears lot at motorway speeds and feel sluggish. It will also have less than ideal amounts of engine braking when going down hills offroad.

Title: Re: Newbie advice
Post by: bigjeepzj on June 29, 2014, 09:26:45 PM

 :iagree:

Title: Re: Newbie advice
Post by: gazjeep on June 29, 2014, 09:59:29 PM

Yep, what they said  :icon_super:

Title: Re: Newbie advice
Post by: Syncro stan on June 30, 2014, 06:08:46 AM

So, better staying nearer stock, how easy to mod gearing?

Title: Re: Newbie advice
Post by: jay140285 on June 30, 2014, 06:52:01 AM

I am running 31's without a re gear.


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Title: Re: Newbie advice
Post by: bigjeepzj on June 30, 2014, 12:54:16 PM

the cheapest way is to get axles of a 2.5 petrol
or it's expensive 

Title: Re: Newbie advice
Post by: JamesH on June 30, 2014, 01:21:20 PM

It'll work while you get the lift and tyres and any niggles sorted. Then the swapping in of 2.5 petrol axles or buying new ring and pinions gears, overhaul kits and labour to have them fitted can be done. I'd fit the lift kit and tyres first and get used to what it's like - I ran mine on 31" tyres with stock gear for ages.

Title: Re: Newbie advice
Post by: jay140285 on June 30, 2014, 04:54:08 PM

Mine will cruise on motorway ok only time I noticed a problem was with a sticky calliper and a big road hill climb.


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Title: Re: Newbie advice
Post by: Syncro stan on June 30, 2014, 05:06:21 PM

Thanks

Title: Re: Newbie advice
Post by: georgen on June 30, 2014, 07:56:16 PM

Now since i am new to the Jeep thing my gearing is way out running 33,s, I can do 85mph in 3rd gear and fifth is useless unless up to motorway speeds and flat ground or even better downhill, BUT.................... off road I have found the gearing of the TJ low box the opposite, especially than the land rover low box I am more used to, where I would do something in a land rover in 2nd low, I find 3rd low in the TJ better to keep up with the flow with my mates whom I know are running in 2nd low in there Landies, which is a complete up yours to the on road gearing saga I have.
So where I have a problem on the road, I have no such problem once off road and in Low.