Transmission issue when cold - JeepForum.com
 
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post #1 of 12 Old 08-30-2019, 11:28 AM Thread Starter
MartinPoland
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Transmission issue when cold

Hi. I have a strange issue with 45rfe trans - it happeneds only when it’s cold.
I’m starting cold engine, pushing D, starting to go on, everything is ok, transmission shifting ok, but when I’m trying to stop the car transmission don’t want to stop, still pushing forward - stays on 2 or 3 gear and does not go to loose, chokes the engine and engine goes out. It happeneds only when it’s cold, after fiew minutes of driving and fiew stops like this everything is ok. Any idea what’s happened.

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post #2 of 12 Old 08-30-2019, 12:57 PM
jtec
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when this happens - try shifting to N - advise.
have the system scanned for codes.
Does the CEL come on at every stsrt for @3seconds then go out?

When I see the price of OEM I think aftermarket.
When I see the quality of aftermarket I think OEM.
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post #3 of 12 Old 08-31-2019, 02:45 AM Thread Starter
MartinPoland
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Hi. Im shifting to N - because I don't want to shut down the engine, but this does not solve the problem.
System scanned - no codes
What do you mean CEL? What is this?
It happeneds everytime in the morning when engine is cold. When its hot tranny works perfect.
The gearbox was under renovation half year ago, all friction discs were replaced, converter after regeneration, new oil, new filters, new solenoid pack, new lines for oil cooler.
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post #4 of 12 Old 09-03-2019, 01:31 PM
cranbiz
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I'm not sure where this thread belongs but I'm sure it's not in the JL forum.

OP, what is the vehicle? I'm sure it's not a 2019+ Jeep wrangler.

06 KJ
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post #5 of 12 Old 09-05-2019, 07:05 AM Thread Starter
MartinPoland
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Hi. Its 2010 JK with 2,8 crd diesel.
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post #6 of 12 Old 09-05-2019, 07:21 AM Thread Starter
MartinPoland
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545 rfe transmission problem when cold

Hi. I have a strange issue with 45rfe trans - it happeneds only when itís cold.
Iím starting cold engine, pushing D, starting to go on, everything is ok, transmission shifting ok, but when Iím trying to stop the car transmission donít want to stop, still pushing forward - stays on 2 or 3 gear and does not go to loose, chokes the engine and engine goes out. It happeneds only when itís cold, after fiew minutes of driving when temperature is growing everything is ok. System scanned - NO codes
Any idea whatís happened.
The gearbox was under renovation half year ago, all friction discs were replaced, converter after regeneration, new oil, new filters, new solenoid pack, new lines to oil cooler.
Do you think it can be oil pressure sensor in gearbox?
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post #7 of 12 Old 09-05-2019, 07:25 AM
cranbiz
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Moving to the JK forum.

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post #8 of 12 Old 09-07-2019, 01:44 PM
skjeep
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if it stalls it looks like converter lockup. This issue is known with NAG 1 converters with worn lockup springs - where cold fluid remaining in the piston has enough force to engage lockup clutch . But never seen that on RFE trans.
Pressure sensor would normally throw a code.
I would tip the remanned converter

current 2x XJ, 2x JK-U, SJ, M38A1, WJ
gone XJ, TJ, XK, ZJ
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post #9 of 12 Old 09-09-2019, 01:37 PM
cranbiz
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It's not a NAG1, 2010 CRD so it's an export JK and prior to the NAG1. OP says 45 RFE but the common transmission in the Gen 1 JK's was the 42 RFE.

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post #10 of 12 Old 09-10-2019, 04:17 AM
skjeep
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Quote:
Originally Posted by cranbiz View Post
It's not a NAG1, 2010 CRD so it's an export JK and prior to the NAG1. OP says 45 RFE but the common transmission in the Gen 1 JK's was the 42 RFE.

NO


42RFE does not exist.



If you mean 42RLE with VLP (variable line pressure), that was the standard auto tranny behind 3.8 engine. Its predcessor was 42RLE (no VLP) behind 4.0 in TJ or 2003-2007KJ Liberty with 3.7engine. And in fact it is a longitudal clone of a minivan A604 tranny


But 2.8CRD disel used 5-45RFE from the beginning. It is the same trans as found in WJ with 4.7, 2002only KJ liberty with 3.7 engine, 2003-2006 KJ Liberty with 2.8 diesel or WK or Commander with 5.7Hemi up to 2011


In 2012 got also the diesel JK the NAG1

current 2x XJ, 2x JK-U, SJ, M38A1, WJ
gone XJ, TJ, XK, ZJ
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post #11 of 12 Old 09-10-2019, 08:23 AM
cranbiz
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Yeah, the 42 RFE was a typo.

I'm not really up on the export CRD's but I did know the NAG1 wasn't a possibility in 2010, which is why I commented on that.

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17 WK2 Trailhawk
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post #12 of 12 Old 09-10-2019, 09:12 AM
skjeep
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Quote:
Originally Posted by cranbiz View Post
Yeah, the 42 RFE was a typo.

I did know the NAG1 wasn't a possibility in 2010, which is why I commented on that.



not in JK, but in other models yes For example NAG1 was standard with 2,7CRD diesel WJ, 3,7WK etc

current 2x XJ, 2x JK-U, SJ, M38A1, WJ
gone XJ, TJ, XK, ZJ
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