I started tearing apart the parts TJ this week. The parts TJ (owned by a friend) is a 98 wrangler sport with a blown head gasket a horrible knock and a rusted out frame. But the good news is it has a 3 speed auto tranny.
I pulled the tranny out Saturday night. After cleaning it up I took it apart a little and welded the stock breather hole shut and re routed it up top where I could run a breather hose to it. Tonight I Swapped the pedal assembly, shifter assembly, and PCM over to my tj I will probably pull my 5 speed out Wednesday night and If all goes well she will be back on the road by Friday. Then I can pull the front axle out and put the new one in(it will be nice to have matching gear ratios in my front and rear axles again)
I cant wait to get back out to Rausch creek with the 8.8 rear, 4.10 gears, 35s, and the auto tranny. It's going to feel like a different Jeep. I'll try to get some pics up of the progress this week.
negative. I like riding the rocks and it is so much easier to do so with an auto. I only drive the jeep about 2 to 3k miles a year but I go wheeling at a local offroad park www.rauschcreek4x4.org as often as I can. I have been using a hand throttle for about 6 months but I drove a auto tj a while back and ever since I've been hooked
hmm. i guess i just have big man syndrome. i love my standard. i take one throttle spring off so it idles between 1200 and 2000 rpm and it crawls itself up most trails. i just stay on the brake and clutch. i also have a hand throttle though.
Sorry for the lack of pics I will try to get them up asap.
Last night after work I pulled the ax-15 out of my jeep and got the 32rh in place. Now all that's left is to install the transfer case, hook up the wiring and kick down cable, replace the tranny pan with a new mopar extra capacity pan and extended pickup, put the tummy tuck skid back on, install the driveshafts then I should be ready for a test drive
What I would give to swap my auto( rebuilt last month or so ) for a five speed. I do to much highway driving and this three speed auto just kills me!
I do very little highway driving. And the jeep is not my daily driver, for that I have a wrx. Im running 35" tires with 4.10 gears. fourth gear in the ax-15 is a 1:1 ratio,the same as 3rd gear in the 3 speed auto and at 70mph in 4th gear im only at 2500rpm so it will still be capable of longer trips.
Do you know if you have a locker in the rear or if it is an open diff?
If it is open then all you have to do is jack up the rear end so that one tire is off the ground. Rotate your tire 2 full revolutions. While you are spinning the tire count how many revolutions your drive shaft makes.
The number or revolutions that the drive shaft makes would be your gear ratio ( if you have 4.10s the drive shaft will make just a little over 4 revolutions )
If you have a locker, jack up the rear so that both tires are off the ground and only rotate the tire one revolution. Count the drives shaft revolutions the same as above.
Assuming your TJ previously had the 5-speed transmission Solman, you'll need to install an extended output shaft seal into your new 32RH or it will leak ATF like a sieve where the 231 input shaft seats into it. When it was origninally installed against the 5-speed, the 231's input shaft is too short to seal into the 32RH so you need to install that extended output shaft seal onto the 32RH.
Don't bother seeing if it will leak, it WILL leak... and big-time too. You'll also need a different crankshaft position sensor for the automatic's bell housing, the one from the 5-speed won't work.
I did my 5-speed to 32RH conversion for rock crawling purposes too and it was as much of a boost to its offroad abilities as adding the f/r lockers, 4.88 gearing, and big-ass tires.
That the automatic allowed my Jeep to suddenly easily climb three particular rock waterfalls without a winch that always required a winch prior to the conversion brought home the fact an automatic's torque converter gives 2-3X greater low-end torque than is available with a manual transmission.
Some just don't get the benefits to an automatic transmission on extreme level trails and never will... and very likely because they simply don't do extreme level trails. I've been driving manual transmissions since the 60's but for rock crawling and other extreme-level trails, give me an automatic any day.
__________________ When you have a choice, buy American.
Jerry, I bought the extended seal from Teraflex per an email I got from you a few months ago. I already installed it in the tranny a couple days ago. As for the CPS I have the entire parts jeep at my house that the tranny came from so I left the cps from the auto attached. Hers a break down of what I took from the parts jeep.
32rh 3 speed tranny
kick down cable
tranny mount plate that bolts to transfer case skid
tranny cooler lines
teraflex extended rear tranny seal ($30)
mopar performance deep tranny pan kit with extended pickup ($55)
b&m external tranny fluid cooler (plan to bypass stock cooler in the radiator) ($65)
10 quarts of atf+4 tranny fluid ($70)
As a side note on the teraflex external rear tranny seal. It turned out that I did not need it (I installed it anyway) because I have a transfer case that came from a 2001 tj that had the nv3550 transmission. For whatever reason the input shaft on that transfer case sticks out just as far as the one that come on the auto tranny equipped TJs. I guess it was just the np231j transfer cases that were mated to ax-15s / ax-5s that had a shorter input shaft.
Look there's only 2 pedals down there. Its was a little uncomfortable reaching all the bolts but the pedal assembly is swapped out.
The tranny mount on the 32rh is closer to the front that the ax-15. My Undercoverfabworks ultra high clearance skid already had the holes in the right place I just needed to steal the bracket from the parts jeep transfer case skid.
Here is the 32rh in place with the Mopar performance deep pan and extended pickup kit installed.
the new tranny breather hose sits right above the PCM the was taken from the parts jeep as well.
So far that is where Im at with the swap. I did install the tranny cooler yesterday but I havent taken any pics yet. Tonight I should have her all done and ready for a test drive.
Great progress, solman. You'll definitely love the auto for the rocks. My CJ was a manual and I didn't think it could get any better with an auto, so it was a major mind-f*(k for me to believe it when all my rock-crawler buddies had autos in their Jeeps. They talked me into an auto Jeep since I wanted to play in the rocks and I haven't looked back! Have fun and let us know what you think after your first rock run with the auto!!
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Thanks Jerry, and yes the kickdown cable is set right. No slop but not too much tension. Well I buttoned everything up today and took it for a test drive. All I can say is WOW I should have done this a while ago. It shifts great it feels like it has way more low end power and it drops into passing gear right when it should.
Now I need to finish my front axle and put it in so I can test out the auto in 4wd.