Before & After - My 1993 K1500

93 Krawler · 07-29-2015, 12:51 PM

The pcm will shift out of manual 1st to 2nd at the WOT setting specified in the tables. You can start in 2nd, but if stomp on it it will kick into 1st. The easiest way to solve this is to use a shift kit. http://www.summitracing.com/parts/tr...-hd2/overview/ It is exactly what I want. The last kit I did I set the shift firmness to towing so it didn't snap hard. It was fine in 2 hi, but 4 lo was was harsh at higher rpms. I might leave the firmness stock and have the firmness adjusted in the pcm. I do think hooking up the 4 lo wire will help with shifting in drive, but that's it. For now, I will hook the 4 lo wire up and deal with it. I just changed the fluid and flushed it out with Dex 6, so I'm thinking this winter I'll do something. That was like $100 in trans fluid...

93 Krawler · 07-30-2015, 12:45 PM

The wire I should've left intact. DOH!!!

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93 Krawler · 08-10-2015, 07:00 PM

I pulled the harness mostly back out so I could run the 4 lo wire and see what the deal was with the MAF sensor. I was thinking that I attached one to many black/white ground wires together. GM uses black and black/white wires for sensor wires too, not just grounds. Well, that wasn't the problem, they were all good. When I shortened the harness, I staggered the solder connections so there wasn't any next to each other and used shrink tube. For whatever reason, I didn't stagger the MAF wires. Well the shrink tube shrank too far, and a few pointy soldered wires were sticking out and touching the other wire. I fixed those and now the IAT reads within 2 degrees of the coolant temp, or room temp... I'll know tomorrow how the 4 lo wire works out.

tbshakie · 08-11-2015, 09:33 AM

that has to be frustrating as hell. I am glad that you are making progress.

93 Krawler · 08-11-2015, 12:37 PM

Quote:

Originally Posted by tbshakie

that has to be frustrating as hell. I am glad that you are making progress.

Yes, very

Hopefully it will run like it should now.

Anyone ever run Tom woods off set u-joints? Curious to see how they hold up.
My front t-case joint binds some at full droop, so I bought one hoping it won't bind anymore. I usually have to service that joint after every ride.

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tbshakie · 08-11-2015, 01:06 PM

I don't know anyone that runs them. Have read they vibrate like hell at anything over crawling speed, but I do NOT have any first hand experience.

93 Krawler · 08-11-2015, 08:11 PM

Quote:

Originally Posted by tbshakie

I don't know anyone that runs them. Have read they vibrate like hell at anything over crawling speed, but I do NOT have any first hand experience.

My front shaft is made with AG spline, so I'm sure I won't notice any extra vibrations.

blazerbrad · 08-12-2015, 07:26 AM

Out of curiosity, did you now have the VSS on the transfer case or transmission? Glad to hear it is running better now. Now it's time to tear it back out for a cam and a shift kit!

93 Krawler · 08-12-2015, 08:36 AM

Quote:

Originally Posted by blazerbrad

Out of curiosity, did you now have the VSS on the transfer case or transmission? Glad to hear it is running better now. Now it's time to tear it back out for a cam and a shift kit!

It's on the tcase now. There may be a cam in the future, but I'm done for a while...

08-11-2015, 09:33 AM	#4
tbshakie Join Date: Apr 2012 Location: Circleville Ohio Posts: 61	that has to be frustrating as hell. I am glad that you are making progress. __________________ 1976 CJ 5 1984 CJ 7 1993 K3500 GMC 6.5 TD

08-11-2015, 01:06 PM	#6
tbshakie Join Date: Apr 2012 Location: Circleville Ohio Posts: 61	I don't know anyone that runs them. Have read they vibrate like hell at anything over crawling speed, but I do NOT have any first hand experience. __________________ 1976 CJ 5 1984 CJ 7 1993 K3500 GMC 6.5 TD

07-29-2015, 12:51 PM	#1
93 Krawler >>>PMC<<< - CORE Member - - Administrator - Join Date: Sep 2010 Location: Ross, OH Posts: 2,069 Images: 1268	The pcm will shift out of manual 1st to 2nd at the WOT setting specified in the tables. You can start in 2nd, but if stomp on it it will kick into 1st. The easiest way to solve this is to use a shift kit. http://www.summitracing.com/parts/tr...-hd2/overview/ It is exactly what I want. The last kit I did I set the shift firmness to towing so it didn't snap hard. It was fine in 2 hi, but 4 lo was was harsh at higher rpms. I might leave the firmness stock and have the firmness adjusted in the pcm. I do think hooking up the 4 lo wire will help with shifting in drive, but that's it. For now, I will hook the 4 lo wire up and deal with it. I just changed the fluid and flushed it out with Dex 6, so I'm thinking this winter I'll do something. That was like $100 in trans fluid...

07-30-2015, 12:45 PM	#2
93 Krawler >>>PMC<<< - CORE Member - - Administrator - Join Date: Sep 2010 Location: Ross, OH Posts: 2,069 Images: 1268	The wire I should've left intact. DOH!!!

08-10-2015, 07:00 PM	#3
93 Krawler >>>PMC<<< - CORE Member - - Administrator - Join Date: Sep 2010 Location: Ross, OH Posts: 2,069 Images: 1268	I pulled the harness mostly back out so I could run the 4 lo wire and see what the deal was with the MAF sensor. I was thinking that I attached one to many black/white ground wires together. GM uses black and black/white wires for sensor wires too, not just grounds. Well, that wasn't the problem, they were all good. When I shortened the harness, I staggered the solder connections so there wasn't any next to each other and used shrink tube. For whatever reason, I didn't stagger the MAF wires. Well the shrink tube shrank too far, and a few pointy soldered wires were sticking out and touching the other wire. I fixed those and now the IAT reads within 2 degrees of the coolant temp, or room temp... I'll know tomorrow how the 4 lo wire works out.

08-12-2015, 07:26 AM	#8
blazerbrad - CORE Member - Join Date: Feb 2007 Posts: 831 Images: 6	Out of curiosity, did you now have the VSS on the transfer case or transmission? Glad to hear it is running better now. Now it's time to tear it back out for a cam and a shift kit!