NV3550 Install - Page 2

**jerresredyj** · 07-30-2012, 06:58 PM

Quote:

Originally Posted by nathanninja

When I did my swap, I noticed the pilot bearing I took out was small (about 1" OD). The OEM part number for a 94-95 YJ references a larger (about 1.8" OD). And if you look at the end of the crank, it looked like there was 2 bores for a pilot bearing, the smaller one being farther in, and the larger one being closer to the rear of the vehicle. I was going to try the OEM larger one in the larger bore, but I was afraid it would sit too far back on the input shaft and hit the splined part of the shaft. But it looks like thats exactly what you did, and didn't have any problems?

I felt the same about the larger bore. I measured the best I could and it looked like it would be close. I didn't have to force anything so I'm hoping it will be ok.

nathanninja · 07-30-2012, 07:52 PM

Quote:

Originally Posted by jerresredyj

I felt the same about the larger bore. I measured the best I could and it looked like it would be close. I didn't have to force anything so I'm hoping it will be ok.

Humph, makes me wish I had used that bearing instead of the bushing. Less friction, plus I had to sand out my bushing to fit, so it's not even perfect. Oh well, at least I'm not the only one. Post back when you know for sure that its not binding anything and I'll amend my info thread to reflect that

Mr.ThunderMakeR · 07-31-2012, 12:54 PM

Quote:

Originally Posted by Karma

The shift tower is not a straight bolt in. You will have to move a mounting tab on the tower to match the bolt pattern on the tranny. I can't easily describe the issue but you will see it. The fix is obvious and requires minor welding on the tower mounting, not on the tranny. I just wanted to mention it so you will know what to expect.

Why did you change the shift tower?

Karma · 07-31-2012, 01:30 PM

Quote:

Originally Posted by Mr.ThunderMakeR

Why did you change the shift tower?

HI Thunder,
Because the tower bolt pattern (AV15) did not match the pattern on the transmission (3550).

Sparky

Mr.ThunderMakeR · 07-31-2012, 03:40 PM

Quote:

Originally Posted by Karma

HI Thunder,
Because the tower bolt pattern (AV15) did not match the pattern on the transmission (3550).

Sparky

Wouldn't it be easier to retain the NV3550 tower and shifter?

Karma · 07-31-2012, 05:01 PM

Quote:

Originally Posted by Mr.ThunderMakeR

Wouldn't it be easier to retain the NV3550 tower and shifter?

HI Thunder,
I think we are talking about two different things. My '89 YJ came with the AX15 and had the shift tower for that tranny and vehicle. My new 3550 did not come with a tower. Therefore, I had to adapt the AX15 tower to the 3550.

If you have researched this tranny swap, you will find this to be a normal problem. It's not difficult but the mounting tab must be moved for the AX15 tower to mount on the 3550.

Sparky

**jerresredyj** · 07-31-2012, 07:50 PM

Karma, thanks for the info on the ax15 to 3550 swap but I'm doing a BA10 to 3550 swap.

Karma · 07-31-2012, 09:33 PM

Quote:

Originally Posted by jerresredyj

Karma, thanks for the info on the ax15 to 3550 swap but I'm doing a BA10 to 3550 swap.

HIjerres,
Oh, I'm sorry. Actually, I knew that but I got confused. I haven't read the front end of thread for a while. That happens a lot.

Sparky

jamesbland123 · 07-31-2012, 11:46 PM

Not sure if you drive the jeep in any water, but when I did my 3550 swap I vented the tranny with a nipple so I could use a hose going to the engine bay. The stock vent is a small piece of metal that loosely covers a hole. For most driving is fine, but if you go into water over the top of the tranny you might want to re-engineer that.

Mr.ThunderMakeR · 08-01-2012, 09:33 AM

Quote:

Originally Posted by Karma

HI Thunder,
I think we are talking about two different things. My '89 YJ came with the AX15 and had the shift tower for that tranny and vehicle. My new 3550 did not come with a tower. Therefore, I had to adapt the AX15 tower to the 3550.

If you have researched this tranny swap, you will find this to be a normal problem. It's not difficult but the mounting tab must be moved for the AX15 tower to mount on the 3550.

Sparky

Got you. I'm just gonna make sure I get one with the original shift tower. It looks like most of the ones on ebay have it.

Quote:

Originally Posted by jamesbland123

Not sure if you drive the jeep in any water, but when I did my 3550 swap I vented the tranny with a nipple so I could use a hose going to the engine bay. The stock vent is a small piece of metal that loosely covers a hole. For most driving is fine, but if you go into water over the top of the tranny you might want to re-engineer that.

Got any pics? This was something I was already thinking about.

Karma · 08-01-2012, 09:53 AM

HI,
I don't see the purpose of a special transmission vent. The factory does not supply one. I think the reason is because the transmission vents through the top opening for the shift tower. And that opening is impossible to totally seal. At least, so I've found.

Am I wrong?

Sparky

**jerresredyj** · 08-05-2012, 11:25 AM

Here's the vent on the NV3550. I'll probably replace it with a barbed fitting and hook up the old vent hose.

**jerresredyj** · 08-22-2012, 08:44 PM

Installed skid pan Saturday. I had to make the trans mount and torque arm bolt slots about a 1/2" longer towards the rear. I used the Advance Adapters transfer case shifter bracket and had to do some file work on the linkage so I could adjust it about 1/4" shorter. I only had to trim the trans tunnel to clear the transfer case shifter bracket. PO had trimmed the tunnel to clear the shifter when they installed a 3" BL and transfer case drop, both which are now gone.

Today I made a trans tunnel cover pattern.

Mr.ThunderMakeR · 08-23-2012, 01:58 PM

Got any more specific info about how you made that pattern? Cardboard? I've been thinking about how to do this as cardboard won't match the curvature of the tunnel. Also is your TCase shifter on the pass side and trans shifter on the driver side? That's opposite of the original YJ layout, but its a good idea.

I'm going to have to get creative as I'm using a TJ tcase shifter handle that mounts to the tub and not the transmission.

**Opihi59** · 08-23-2012, 02:13 PM

Quote:

Originally Posted by Mr.ThunderMakeR

Also is your TCase shifter on the pass side and trans shifter on the driver side? That's opposite of the original YJ layout, but its a good idea.

Based on the curve of the shifter, the photograph is taken from the passenger side of the Jeep. Front would be towards the right in the image, so the T case shifter is Driver's side and conventional layout.