What's new
CK5
Register an account today to become a member! Once signed in, you'll be able to participate on this site by adding your own topics and posts, as well as connect with other members.

'89 R3500 Crew Cab 2wd to 4wd conversion & beyond

Started out with 2wd TBI350 with SM465 to current 4wd with 454, 700r4, NP241
Overview Gallery Discussion
At this point I'm going to keep plugging away. I figure next I need to get the harness connected to the 4l80 then I can go for a drive and see if anything shows up with the engine under a load.

If it stays quiet I'll do an oil change and filter check to be sure nothing internal is trying to sacrifice itself.
 
Sure sounds like you found a belt squeak. You could also give it a squeech of belt dressing as it’s making noise and see if it quiets down immediately. Im not a huge fan of the stuff but it does help isolate the problem.

I’ve found sometimes the belt is squeaking where the edge is riding on a pulley too. It can wear in eventually and quiet down on its own, if a pulley is out of alignment it won’t go away. On that setup the only pulley with the ability to move in-out is the ps pulley. It could be off a little bit.

If it is squeaking on an edge you’ll usually see it shine up that edge more than the other side.
 
I had a belt squeal on my L29 when I first fired it. Everything was brand new and it eventually went away on it's own.
 
Gonna have to be careful rotating the engine with the ratchet. Noticed the handle was hitting the fan wires. You can see the nice knurl imprints.

20240625_143817.jpg


I also did a tailpipe smoke test.


I need to shorten a couple of my airlines. They are 4an that were listed as nitrous lines. They are PTFE lined. Has anyone cut ends off similar and put on reusable hose ends? I found PTFE hose ends on Summit. Seems like it should work for lines that see 150psi max.

20240625_173039.jpg
 
Are you wanting to reuse a AN fitting on a trimmed ptfe line? I just did this on my trans cooler and put a proper 90 in it.

Zero problems and my line pressure is around 230psi
 
mrk5 said:
I also did a tailpipe smoke test.


I need to shorten a couple of my airlines. They are 4an that were listed as nitrous lines. They are PTFE lined. Has anyone cut ends off similar and put on reusable hose ends? I found PTFE hose ends on Summit. Seems like it should work for lines that see 150psi max.
Click to expand...
Engine sounds good!

As for the hose ends, make sure they are for the correct wall thickness and ID...no repeats...;)

Babaganoosh said:
Are you wanting to reuse a AN fitting on a trimmed ptfe line? I just did this on my trans cooler and put a proper 90 in it.

Zero problems and my line pressure is around 230psi
Click to expand...
Cooler line pressure does not equal transmission shift pressure. Usually the cooler line is only around 80 psi or so I have read, never actually measured it.
 
folkenheath said:
Engine sounds good!

As for the hose ends, make sure they are for the correct wall thickness and ID...no repeats...;)


Cooler line pressure does not equal transmission shift pressure. Usually the cooler line is only around 80 psi or so I have read, never actually measured it.
Click to expand...
You’re right, I need more coffee.
 
Babaganoosh said:
Are you wanting to reuse a AN fitting on a trimmed ptfe line? I just did this on my trans cooler and put a proper 90 in it.

Zero problems and my line pressure is around 230psi
Click to expand...
folkenheath said:
Engine sounds good!

As for the hose ends, make sure they are for the correct wall thickness and ID...no repeats...;)
Click to expand...
True. I can't remember who made the lines, it was Zex or something like that. They are about 4 ft too long and I don't want to just coil up the excess like I had before; looks messy. I was thinking new hose ends would be cheaper than new lines.

I went ahead and picked up a new little pulley like @skunked has for the AC delete. It was a GM Genuine, included the bolt and spacer, and cost just about $25. It fits with the AC compressor.

20240627_102218.jpg

This gives me another belt option. I can use the belt I bought the first time around that fits that little pulley as a spare.

This past weekend we ran a couple trails and had to pull a Jeep off the trail because his alternator seized and burned thru the belt. I was thinking have a couple of belt options might allow a person to bypass a pulley and still drive home.

I finally got the harness routed down to the 4l80. I needed a different plug type for the output speed sensor (OSS) in the tcase which finally showed up. I have the early 90's style that ORD used for the NP205 housing. Actually the harness would have been just a few inches too short to reach the OSS without the new connector.

Along those lines, my biggest complaint about the Terminator so far is they don't seem to have 4x4's in mind for it. As I mentioned the OSS harness is too short and they don't have a way to tune the trans for low range in the transfercase. I can put the trans into manual mode which is how I'll probably run low range. My only concern is whether or not I'll ever get torque converter lock. I like being able to lock the torque converter to keep the heat down. I could also make a tune for trail use that would compensate. I figured out the math to where I can change the transmission gearing and axle gearing in the software to equal the same compound low range gear ratios. Downside is having to keep a laptop handy to load the different tunes.

Back to the trans harness, Scott from 6 years ago didn't do me any favors when he installed the 4l80e harness on the standalone controller he buried it under the carpet using the original hole for the SM465 shifter that was in the truck. Since then I have added additional framing to the seat frame that really pins the carpet down. So rather than tear out the entire interior, I just cut the carpet.

20240627_135223.jpg

I'll find some way to cover over the cut so it's not too ugly.
 
If your using the turbine speed sensor and vss on the trans it will work just fine sense it’s 1:1 but if the sensor is in the magnum or tcase it will give the terminator fits.

This is why I have a adapter with the vss in it for low range so it doesn’t care what the transfer case is doing.
 
The OSS is in the tcase tail housing. Unfortunately my 4l80e was a 4x4 version I got before I knew about the advantages of using a 2wd unit. And I didn't get lucky and have a tone ring for the OSS in the trans like a few have.
 
It's a 95. The 4wd cases have a spot for the OSS, but there's just a plug there instead. There are rumors of people getting lucky and having a tone ring for the OSS in a 4wd trans, but it didn't happen for me.
 
mrk5 said:
Along those lines, my biggest complaint about the Terminator so far is they don't seem to have 4x4's in mind for it. As I mentioned the OSS harness is too short and they don't have a way to tune the trans for low range in the transfercase. I can put the trans into manual mode which is how I'll probably run low range. My only concern is whether or not I'll ever get torque converter lock. I like being able to lock the torque converter to keep the heat down. I could also make a tune for trail use that would compensate. I figured out the math to where I can change the transmission gearing and axle gearing in the software to equal the same compound low range gear ratios. Downside is having to keep a laptop handy to load the different tunes.
Click to expand...
I agree, I wish they had an input in the software so you could tell it you're in low range. Then you could just tell it your gear ratio and it would work either way.

The way you have it, it will work fine in high range, but it will shift late in low range, or not shift at all.

However, even with other ECU, you have to use a manual switch to tell it you are in low range, because many transfer cases have 4WD switches in them, but not low range switches.

With the Dom/HP ECUs you can load different tunes straight from the digital dash, no laptop needed. Not sure that's possible with the Terminator X unfortunately.
 
Not having the ability to use the TCC lockup when the selector is in anything other than D would be kind of dumb. Is that really how the terminator system is programmed?

Using a second tune to change lockup min speed might be the way forward. Is there no other terminator OS that includes 4wd tables?
 
Tnsejed said:
Not having the ability to use the TCC lockup when the selector is in anything other than D would be kind of dumb. Is that really how the terminator system is programmed?

Using a second tune to change lockup min speed might be the way forward. Is there no other terminator OS that includes 4wd tables?
Click to expand...
No, lockup can happen in other gears too, I think the TCC can be locked in 2nd, 3rd, or 4th.

centexk5 said:
Anyway to put a manual switch in line to force lock up? Used to have one on my old Cummins.
Click to expand...

Yes, you can lockup the converter just by switching that TCC wire to ground in parallel to the computer.

He could also make it a virtual switch in his digital dash if he wanted.
 
I found a video of the new v3 trans controls for the holley terminator and TCC on a 4l80. Its got everything you'd need to change for low range speed lock and unlock. Speed tables and gear are there. As long as it works in the manual mode (not really sure what that means in this system). If it will still follow the tables, or if only automatic mode D will do it. Its too dumb if it doesn't work in the manual mode or with the selector anywhere other than D.

Gonna take some playing though. It's got duty cycles too so that's cool.
 
Tnsejed said:
I found a video of the new v3 trans controls for the holley terminator and TCC on a 4l80. Its got everything you'd need to change for low range speed lock and unlock. Speed tables and gear are there. As long as it works in the manual mode (not really sure what that means in this system). If it will still follow the tables, or if only automatic mode D will do it. Its too dumb if it doesn't work in the manual mode or with the selector anywhere other than D.

Gonna take some playing though. It's got duty cycles too so that's cool.
Click to expand...
I think that would work but wouldn’t you have to swap tunes along with shifting the tcase?
 
You must log in or register to reply here.

Latest Posts

Top Bottom