Rebuilt 4L60E transmission problem after replacement

badluck53 · 04-05-2009, 04:54 PM

Just replaced transmission for my '95 Chevy Cheyenne 1500 4x4 truck with a warrantied transmission (3yrs - 36k miles). The original transmission was slipping. Now have intermittent problem of truck downshifting from 3rd into 2nd and then staying there. Had to drive 15 miles @30miles an hour until I got home. After turning truck off and letting it rest for a few minutes, went on another ride and the transmission stayed in the proper gears. Is there a sensor on a '95 that should be looked at which affects the transmission? Not really familiar with the computer modules on these. Have been a backyard mechanic since a teenager, but this has me floored since it could involve the computer. Does anyone have any suggestions as to what this problem may be? Hoping that the transmission is okay as it was just installed in the truck last Thursday & just got it back on Monday. Have to have the truck in driving shape very soon as moving to another job site after going back home to TN from IL within the next 4-6 weeks.

mudseeker · 04-05-2009, 06:40 PM

could be pressure bleed off due to a sticky/leacking valve. also check the 20 pin connection at the trans, could have a loose wire.

badluck53 · 04-05-2009, 07:02 PM

Thank you so much!!! I relayed this info to my husband (who is up in Illinois & having the transmission problem). He hasn't had a chance to look at the harness connector yet but at least he has a good idea now of where to start looking. He's hoping it's not a pressure bleed problem as the transmission is rebuilt from a shop somewhere in southern Illinois & had just been shipped to a local garage who installed it. I will update you with any other info he relays to me after he looks at the 20-pin connector, etc.

Case 7230 · 04-06-2009, 03:53 AM

Quote:

Originally Posted by mudseeker

could be pressure bleed off due to a sticky/leacking valve. also check the 20 pin connection at the trans, could have a loose wire.

Do these transmissions have a throttle cable that could be sticking?

badluck53 · 04-06-2009, 05:14 AM

Quote:

Originally Posted by Case 7230

Do these transmissions have a throttle cable that could be sticking?

I just relayed this piece of info to him as I don't know if this model of transmission has a throttle cable. I know that the throttle body sensor on my Hyundai Tuscon was causing a very similar problem & had to be replaced and I didn't know whether a 1995 Chevy Cheyenne had sensors like that or not.

Case 7230 · 04-06-2009, 05:58 AM

OK. I was really asking mudseeker as he is one of the Chevy experts on here. I was really wondering about a cable connection to the trans. Your truck will have a Throttle Position Sensor but I don`t know if that trans gets an input from that or not.
I`m sure more guys will chime in shortly.

mudseeker · 04-06-2009, 11:08 AM

the 60e does not use a TV cable. the trans senses load with the map sensor(shift points), tps(kick down) and a few others i'm not remembering. a scan tool would easily pin point the problem with a short drive watching the trans data.

Case 7230 · 04-06-2009, 01:42 PM

Quote:

Originally Posted by mudseeker

the 60e does not use a TV cable. the trans senses load with the map sensor(shift points), tps(kick down) and a few others i'm not remembering. a scan tool would easily pin point the problem with a short drive watching the trans data.

Thanks for the reply. But another question, does that trans have a governor assembly? And another, does it get any information from the Vehicle Speed Sensor?
I`m interested myself but hopefully it may help the original poster.

mudseeker · 04-06-2009, 08:32 PM

Quote:

Originally Posted by Case 7230

Thanks for the reply. But another question, does that trans have a governor assembly?the 700r uses a governor, but i'm pretty sure it's electronic brother does not And another, does it get any information from the Vehicle Speed Sensor?the VSS is in the trans, but i don't think it uses the info for shifts. there may be an ISS(input) and OSS(output) that monitors slippage, but not relevant to the posters problem
I`m interested myself but hopefully it may help the original poster.

/.........................

hotrodpc · 04-06-2009, 09:30 PM

My guess is going to be a malfunction in Solenoid B. Sol B controls the 2-3 shuttle valve and the 2-3 shift valve. Just a guess, it could be the Sol B itself, or either the 2-3 Shuttle Valve or 2-3 shift valve in front of the shuttle valve. For the purpose of driving it until it is fixed, give this a try. I understand you are saying it is going into 2nd gear and staying there and not shifting into 3rd. So when it is stuck in 2nd gear, bring the shift lever manually into 2nd gear, then shift into 3rd, leave it there for a couple seconds, then shift into OD. What this does, is fluid is routed differently in manual selected 2nd, and differntly into manual selected 3rd than it is if just in OD. So the purpose would be to reroute the fluid and possibly bypass the problem. Basically just like a road map, going to the same location, just taking a differant route. No guarentee it will make a difference, but it might be a way to be able to drive it until fixed properly.

04-05-2009, 04:54 PM	#1
badluck53 Junior Member Join Date: Apr 2009 Location: Nashville, TN Posts: 3	Rebuilt 4L60E transmission problem after replacement Just replaced transmission for my '95 Chevy Cheyenne 1500 4x4 truck with a warrantied transmission (3yrs - 36k miles). The original transmission was slipping. Now have intermittent problem of truck downshifting from 3rd into 2nd and then staying there. Had to drive 15 miles @30miles an hour until I got home. After turning truck off and letting it rest for a few minutes, went on another ride and the transmission stayed in the proper gears. Is there a sensor on a '95 that should be looked at which affects the transmission? Not really familiar with the computer modules on these. Have been a backyard mechanic since a teenager, but this has me floored since it could involve the computer. Does anyone have any suggestions as to what this problem may be? Hoping that the transmission is okay as it was just installed in the truck last Thursday & just got it back on Monday. Have to have the truck in driving shape very soon as moving to another job site after going back home to TN from IL within the next 4-6 weeks.

04-05-2009, 06:40 PM	#2
mudseeker Senior Moderator Join Date: Feb 2006 Location: michigan Posts: 6,373	could be pressure bleed off due to a sticky/leacking valve. also check the 20 pin connection at the trans, could have a loose wire. __________________ i'd rather be hunting

04-06-2009, 11:08 AM	#7
mudseeker Senior Moderator Join Date: Feb 2006 Location: michigan Posts: 6,373	the 60e does not use a TV cable. the trans senses load with the map sensor(shift points), tps(kick down) and a few others i'm not remembering. a scan tool would easily pin point the problem with a short drive watching the trans data. __________________ i'd rather be hunting

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04-05-2009, 07:02 PM	#3
badluck53 Junior Member Join Date: Apr 2009 Location: Nashville, TN Posts: 3	Thank you so much!!! I relayed this info to my husband (who is up in Illinois & having the transmission problem). He hasn't had a chance to look at the harness connector yet but at least he has a good idea now of where to start looking. He's hoping it's not a pressure bleed problem as the transmission is rebuilt from a shop somewhere in southern Illinois & had just been shipped to a local garage who installed it. I will update you with any other info he relays to me after he looks at the 20-pin connector, etc.

04-06-2009, 05:58 AM	#6
Case 7230 Senior Member Join Date: Dec 2007 Posts: 547	OK. I was really asking mudseeker as he is one of the Chevy experts on here. I was really wondering about a cable connection to the trans. Your truck will have a Throttle Position Sensor but I don`t know if that trans gets an input from that or not. I`m sure more guys will chime in shortly.

04-06-2009, 09:30 PM	#10
hotrodpc Senior Member Join Date: Jul 2008 Location: OKC, OK Posts: 3,145	My guess is going to be a malfunction in Solenoid B. Sol B controls the 2-3 shuttle valve and the 2-3 shift valve. Just a guess, it could be the Sol B itself, or either the 2-3 Shuttle Valve or 2-3 shift valve in front of the shuttle valve. For the purpose of driving it until it is fixed, give this a try. I understand you are saying it is going into 2nd gear and staying there and not shifting into 3rd. So when it is stuck in 2nd gear, bring the shift lever manually into 2nd gear, then shift into 3rd, leave it there for a couple seconds, then shift into OD. What this does, is fluid is routed differently in manual selected 2nd, and differntly into manual selected 3rd than it is if just in OD. So the purpose would be to reroute the fluid and possibly bypass the problem. Basically just like a road map, going to the same location, just taking a differant route. No guarentee it will make a difference, but it might be a way to be able to drive it until fixed properly.