Ok, so I got rid of my 24V with headaches, and apparently picked up a 12V with someone else's headaches.. So, out of the frying pan, into the fire.I've been working out some kinks on this '97. I test drove it last friday, and from what I recall, it seemed to be fine.. Unless I didn't notice it (my fault for lack of due-diligence.)At any rate, the issue (for this thread) is the transmission.Story goes: 2 owners ago, dude bought a Jasper trans, installed it, killed it, warrantied it, killed that one, warrantied it, killed it, then Jasper said "this is your last one."so he pulled the 5spd from this '97, installed the Jasper auto in it, and stuck the 5 speed into the truck that he was using to kill transmissions.However, he did a ____-poor job, and sold it to last owner, who killed the poorly/improperly incomplete install in short order. So he took it to a diesel trans guy in MD, who rebuilt the Jasper trans using triple disc TC, red clutches, kevlar bands, HD valve body, etc. (parts from HTS Diesel).Installed a PCM (to replace a non-existant one) and rewired everything, so to speak, or so the story goes.Fast forward to me.. ( I don't need any "I told you so" type stuff, because I know. Believe me, I know.. One word: Wife. )I drove it home last friday, and all seemed well, although I did notice it seemed to rev a little higher to get it moving.. Granted, I'm new to autos, as my '01 was a manual, and the '96 before that, was manual, so I'm somewhat rusty on how they perform/react. Thought maybe the TC had a little higher stall.Last night, my 7 y.o. daughter wanted to ride around the block in the new dually.. Wish granted. That's when I noticed that something wasn't quite right... No low/1st gear engagement. Neither with shifter in D, or if I manually drop it to L (1), nothing, nada.. it seems to stay in 2nd gear or so.. I will add that if in D, at a stop, let off the brake and the truck starts to creep forward.. give a little throttle and drop it into 2nd, it feels to almost 'drop' a gear, as the forward progress seems to be a more positive engagement, but still no 1st. Driving 30mph, slow prepare for a stop sign, drop lever to 2, it downshifts.. drop to 1 from like 10mph, no gear change/drop occurs.. it stays in 2nd..TC lockup and such works, and with the 4.10s, 60-65mph yeilds about 1900-2000rpm.The Coolant Temp Sensor circuit is fubar somewhere, as is the tach in the I/C. The tach does read through the scan gauge, however, so the Crank Position Sensor seems to be operational.I was told this trans has a 3/36 warranty, but getting that info is proving to be a tad on the tough side..Trans looks fresh, complete with gray paint, Jasper stickers, etc., so it was apparently rebuilt in the Jasper case.Help. I need to troubleshoot this as inexpensively as I can, for obvious reasons.

http://www.cumminsforum.com/forum/98-5-02-performance-parts-discussion/534021-stronger-pull-trans-cable-without-limited-throw.html

"Tightning the TV cable does nothing more than increase your trans pressure so that the trans governor needs more shaft RPM to overcome the increased pressure.Adjust it too tight & it won't want to shift & it will downshift too early"

Early shifting could be the TPS. You may need to pull the sleeves out of the mounting holes to change the shift points enough.

I've done this. To get it to shift later, I almost have to run the TPS at around 1.6-1.8v.

I've done this. To get it to shift later, I almost have to run the TPS at around 1.6-1.8v.

Dang!! How comw every time I come up with something to help you shoot me down in flames??

Dang!! How comw every time I come up with something to help you shoot me down in flames??

Because I've been at this for over a year lol Sent from my SPH-L710 using Tapatalk 2

So a week into having the replacement transmission, triple disk converter, and my valve body, the lockup is viscous (as expected).However, I still have the early shifting issue. TV cable is adjusted properly, etc.This weekend, Im going to try and stick the stock VB that came in the replacement trans back into it, and see how that does.

I don't remember...have you tried running a potentiometer and setting the shift point yourself?

I don't remember...have you tried running a potentiometer and setting the shift point yourself?

yeah, I have. I had an odd issue, however, with after awhile, say cruising for 30-40minutes down the highway, it would disable OD all together. A cycle of the ignition is what it would often take to clear the issue.

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I just read this somewhere on the webz:

3-4 UPSHIFT OCCURS IMMEDIATELY AFTER 2-3 SHIFT

1. Overdrive Solenoid Connector or Wiring Shorted. 1. Test connector and wiring for loose connections, shorts or ground and repair as needed.

2. TPS Malfunction. 2. Test TPS and replace as necessary. Check with DRB® scan tool.

3. PCM Malfunction. 3. Test PCM with DRB® scan tool and replace controller if faulty.

4. Overdrive Solenoid Malfunction. 4. Replace solenoid.

5. Valve Body Malfunction. 5. Remove, disassemble, clean and inspect valve body components. Make sure all valves and plugs slide freely in bores. Polish valves with crocus cloth if needed.

1. Haven't checked this out

2. Replaced TPS

3. Replaced PCM

4. Hmm...

5. I've done this. I have a replacement one that I can throw in, as well.

Rick I've just did my break in service @ 5k on my HD rebuild & upgraded to the 48re. I have a Q for you. I've noticed before this service & now after that the tranny when pulling a load with OD off will up shift, down shift to 3rd & 4th around the 2 to 2.4k rpm range. To avoid this I put a little more fuel to it, increase RPMs, it down shift till it hits 2.5k rpm, then up shifts to 4th. I don't thing it should be doing this. Your thoughts please.

With the OD in the "OFF" position, it should shift 1, 2, 3, LU. If you then turn the OD "ON", it will unlock, then go into OD, then lockup again.2500 rpm is high for it to shift at, under normal to moderate pedal travel. Have you checked your TV cable adjustment? Basically, you want it (the TV arm on the trans) "closed" or at the furthest point forward at idle. as soon as you start to move the throttle, the TV cable should start to move the arm. At WOT on the pedal, the TV arm should be at it's farthest point toward the rear of the trans.If it is too tight, this will cause a later shift into gears, as well as a more abrupt gear change.Is this what you are experiencing?

Yes, but only when under a load. the trans will not ossilate between 3 & 4 with no load... So I need to make sure TV cable is adjusted correctly, how about the throttle pressure/position and solenoids ?? Thanks for the help, been OT for a few weeks, will monitor thread daily now.