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How's the steep downhill decents? One person here in the local club just recently purchased a '99 TJ with the auto and built up nicely. Tera 4" lift, 1" bl, D60's front and rear with 4:10's and is running 35x12.50 SSR's. You have to virtually put your foot through the floor board going down hills in this thing, standing on the brake with two feet . It just wants to go... Is this pretty typical for auto's?
I was reading somewhere, that someone (B&M Racing maybe ?) makes a kit for the TH700 that allows it to lock.
Anyone know anything about it.
Any thoughts?

Fred
 

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nice sig Fred <IMG SRC="smilies/thefinger.gif" border="0">

[ 10-23-2001: Message edited by: RCKRATZ ]
 

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Iam running a late 60's model borg warner cast iron cruise-o-matic with 4.88 gears.I have no trouble with down hill crawling. My uncle has a 99 TJ and he has the same complaint as your friend, it does not hold itself back on down slopes. He is going to install the atlas transfer case to see if that will cure the proublem.
 

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I understand the older modle auto's had a rear pump driven by the output shaft that kept the pressure up in the trany to so it would creat back pressure going down hill. The newer modles don't (cost factor i guess).

Bigger brakes always help. <IMG SRC="smilies/usa.gif" border="0">
 

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Rubi Ray hit it on the head, My borge warner has a rear pump in it. Even going down the highway when you let up on the gas it does not free wheel or coast like the new autos, it slows down under compresson like a standard tranny.

[ 10-23-2001: Message edited by: Steelfan ]
 

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I have a 94 YJ with 4.0/999/300 (4:1 gears) 4:56 gears and 38's On steep declines I have to put it in Neutral so that I can stop. I am in the process of putting hydraboost on my rig. There is a kit from www.offroadengineering.com that allows you to adjust the idle. If I could drop the idle by 200 rpm I'm sure it would be better.

[ 10-23-2001: Message edited by: The Rockslut ]
 

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LOWER GEARING!

TJs seem to work best with LOW gears IMOO. A stock TJ with 3.73s and the 225/75/15 tires is about perfect with the auto. Interstate driving is still 17-18 mpg at 75-80mph.

later <IMG SRC="smilies/jeep1.gif" border="0">
 

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Originally posted by Mieser:
<STRONG>LOWER GEARING!

TJs seem to work best with LOW gears IMOO. A stock TJ with 3.73s and the 225/75/15 tires is about perfect with the auto. Interstate driving is still 17-18 mpg at 75-80mph.

later <IMG SRC="smilies/jeep1.gif" border="0"></STRONG>
<IMG SRC="smilies/laughing.gif" border="0"> That tire size and nerf bars are tearing up the ARCA curcuit right now! <IMG SRC="smilies/thefinger.gif" border="0"> <IMG SRC="smilies/laughing.gif" border="0"> He said 222/75/15 BWAHAHAHAHAHAAHAAHAHAHA

Did I mention I just got my Maglight mounts put in? <IMG SRC="smilies/biggrin.gif" border="0">
 

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i've never had a problem goin down hills with my 3 spd. offroad or onroad hills. i'm running a stock rig right now with 3.31s and 29" tires.

i'm not sure if my tranny has a pump in the rear. it probly does tho cuz the design is oooold. TF727 backing an AMC360.

try deeper gears i guess. 4.56 or 4.88 sound good. you could also swap in a larger brake master cylinder from a truck. funny thing i found out the other day... AMC wagoneer brake cylinders are bigger than most full size trucks are. gotta love old jeeps.
 

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Did he upgrade the rest of the braking system? With dana 60's and there brakes a jeep should be able to stop on a dime no matter what with very little brake pressure.
 

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My Cj-6 has an AW-4 in it, and it has excellent downhill engine braking......

5.13 gears though.

4.10's are too tall for those tires in my opinion.

Folks are too worried about reving their 4 and 6 cyls, and end up getting way too tall a gear.

get your engine revin. don't be afraid of low gears, then you won't have a problem with your auto like dat.
 

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I ran 4.2/999/300(with 4 to 1) with 4.10 gears on 35" tires and had no problems. I could go down the slabs on the con with it low and no brakes. I just changed my gears to 4.88 and have not had it on the trail yet.
 

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I have basically the same setup (4.10's 36's) and I don't have any problems. Steeper gears will help. If I'm following manuals down a hill I go a little faster but not much.

Sounds obvious but make sure its in 1st and not drive. <IMG SRC="smilies/rolleyes.gif" border="0">
 

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Whatdadealeeoh?
My 00TJ auto with 4.10's and 35's
Stays ingaged down hill as long as I got it in 1st! Dont expect it to slow down in D !
No it dont creap like a stick but it does
slow up, gearing has alot to do with this also. Teralow would really help.
I'm taking donations <IMG SRC="smilies/bounce.gif" border="0">
Geno
 

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what a waste dana 60,s and 35,s...get the sawzall out and put some real meat on there...then you will have more cushion as you are flying down the hill with 4.10,ssss

<IMG SRC="smilies/crybaby2.gif" border="0">
 

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Slut,

Alright smarta$$!!! I was saying that the gearing combo was about right. If you take this formula....

New tire cir. times old gear ratio divided by the old tire cir.

This would allow you to take the feel of a stock TJ and find out what gearing Freds friend needs.

35" SSRs are about 34.5" tall @ 108.33 cir. times the stock 3.73 gears divided by the 225s tire cir of 90" equals 4.49. With the added weight of the SSRs I would go with 4.56 gears.

There you go. I hope that helps a bit more. To clear something else up, NOT EVERYONE WANTS TO RUN IN THE AMERICAN ROCK RACING ASSOC. <IMG SRC="smilies/biggrin.gif" border="0">

later <IMG SRC="smilies/jeep1.gif" border="0">
 

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Originally posted by Mieser:
<STRONG>Slut,

Alright smarta$$!!! I was saying that the gearing combo was about right. If you take this formula....

New tire cir. times old gear ratio divided by the old tire cir.

This would allow you to take the feel of a stock TJ and find out what gearing Freds friend needs.

35" SSRs are about 34.5" tall @ 108.33 cir. times the stock 3.73 gears divided by the 225s tire cir of 90" equals 4.49. With the added weight of the SSRs I would go with 4.56 gears.

There you go. I hope that helps a bit more. To clear something else up, NOT EVERYONE WANTS TO RUN IN THE AMERICAN ROCK RACING ASSOC. <IMG SRC="smilies/biggrin.gif" border="0">

later <IMG SRC="smilies/jeep1.gif" border="0"></STRONG>
<IMG SRC="smilies/laughing.gif" border="0"> I know what you were trying to say but it just sounded funny. Glad to see you didnt get your panties in a wad over that. <IMG SRC="smilies/thefinger.gif" border="0"> <IMG SRC="smilies/biggrin.gif" border="0">
 
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