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TJ auto 1st Low tooooo fast
Posted: Tue Sep 08, 2009 6:26 pm
by mytronic
Hi all
I have just bought myself a Late 1996/early 97 TJ, yes it says 1996 on the sticker

I'm just about to kit it out with 2 inch Lift with EFS Shocks. I notice that 1st low is very fast and frankly scary so if I put Simex 31/9.5/15 under her I should think I will be skating down muddy tracks

Any wise words of wisdom ? as I am used to fabulous 1st low of my MU and Mits JTop
Re: TJ auto 1st Low tooooo fast
Posted: Tue Sep 08, 2009 8:39 pm
by TJ
Three options really:
1) 4L and 1st when going hills
2) Left foot braking (and over-riding that with accelerator)
3) Re-gear diff ratios.
Its actually the diff ratios (probably 3.07) that is the problem not the gear box. So far I have been living with a combination of 1 and 2. Number 3 is an expensive but more permanent/proper solution.
Re: TJ auto 1st Low tooooo fast
Posted: Wed Sep 09, 2009 7:54 am
by mytronic
Thanks for that
Thought as much. I assumed that the low would be as good as a 1994 cherokee I once owned, that had a great low range
Re: TJ auto 1st Low tooooo fast
Posted: Wed Sep 09, 2009 10:38 am
by TJ
mytronic wrote:Thanks for that
Thought as much. I assumed that the low would be as good as a 1994 cherokee I once owned, that had a great low range
I don't know much about Cherokees, but all NP 231s are 2.72:1 low gear ratio. I have a feeling Cherokees had NP 242, which would also have the same low ratio.
But then you might have different transmission and diff ratios giving a different overall crawl ratio. It gets a bit complicated sometimes when you are comparing two different vehicles (unless they have the same engine, gears and everything, including tyre sizes).
Re: TJ auto 1st Low tooooo fast
Posted: Wed Sep 09, 2009 4:25 pm
by mytronic
Cool, will work on this one
Do you know of anyone that has a spare front body mount ?
Mine is missing the rubbers and bolt !
Thanks
Re: TJ auto 1st Low tooooo fast
Posted: Wed Sep 09, 2009 5:19 pm
by xj
mytronic wrote:Thanks for that
Thought as much. I assumed that the low would be as good as a 1994 cherokee I once owned, that had a great low range
Also a 4 sp auto in the Cherokee aye.
Re: TJ auto 1st Low tooooo fast
Posted: Wed Sep 09, 2009 6:56 pm
by mytronic
xj wrote:mytronic wrote:Thanks for that
Thought as much. I assumed that the low would be as good as a 1994 cherokee I once owned, that had a great low range
Also a 4 sp auto in the Cherokee aye.
Yes I remember now
So will a Cherokee trans retrofit to a Wrangler by chance ?
Forever hopeful

Re: TJ auto 1st Low tooooo fast
Posted: Wed Sep 09, 2009 7:55 pm
by TJ
mytronic wrote:xj wrote:mytronic wrote:Thanks for that
Thought as much. I assumed that the low would be as good as a 1994 cherokee I once owned, that had a great low range
Also a 4 sp auto in the Cherokee aye.
Yes I remember now
So will a Cherokee trans retrofit to a Wrangler by chance ?
Forever hopeful

It can be done (many write ups on the net) with a few things. You will need TCM (transmission control module) from the Cherokee. You will also need to play with the front and rear driveshafts (transmission lengths are different). Which also means playing with the transmission skid and the mount. So yes its doable, but you must want it that badly.
Re: TJ auto 1st Low tooooo fast
Posted: Fri Sep 11, 2009 3:31 pm
by mytronic
OK, I will make that stage 3
Just put 31x10.5x15 Silverstone Xtreme tires on and took it for a blat. Must say that I would have expected the 4.0l donkey to do better. And, wow does the fuel gauge actually move and fast I might add

So on the net to find a way of raining her back and getting more bang for buck.
Re: TJ auto 1st Low tooooo fast
Posted: Fri Oct 09, 2009 8:21 pm
by mytronic
Looking at getting a Teraflex transfer case reduction kit
http://www.teraflex.biz/products/low-23 ... nsion.htmlWho knows, hopefully fixes issue
Anybody done this ?
Re: TJ auto 1st Low tooooo fast
Posted: Fri Oct 09, 2009 8:54 pm
by xj
IF its the same on another mate had, it didnt like L3 to L5, and was informed after that it was only to be used in L1 and L2.... or was it the other way around..... cant remember, but there was def something amiss with it.
Search "Atlas II"
Re: TJ auto 1st Low tooooo fast
Posted: Sat Oct 10, 2009 7:43 am
by mytronic
Thanks for the heads up
Will look at the Atlas Version